闸板

For high-speed flow of medium, the gate to open in local conditions can cause the vibration of the gate, and the vibration may damage the gate and the valve seat sealing surface, and cutting medium will suffer erosion flashboard.

对于高速流动的介质，闸板在局部开启状况下可以引起闸门的振动，而振动又可能损伤闸板和阀座的密封面，而节流会使闸板遭受介质的冲蚀。

The paper describes the improvement on the structure of the gate valve in chute,proposes a reasonable design method for the flashboard so that the gate valve can be sealed completely and reliably and the best sealing effect is realized.

对溜槽闸板阀结构进行改进，提出合理的闸板尺寸设计方法，确保溜槽闸板阀的完全可靠密封，达到最佳密封效果。

Knife-type valve: Features 1, ultra-structure length, saving materials, piping systems can greatly reduce the overall weight of 2, the effective space occupied by small, can effectively support the strength of pipelines can reduce the possibility of pipeline vibration 3, flashboard selected austenitic stainless steel, Corrosion performance greatly improved, which can effectively prevent the corrosion caused by gate leakage sealing diarrhea 4, on the use of flexible packing seal PTFE, sealing reliable, flexible and lightweight 5, the gate with Knife function, can effectively break the gates of all types of media objects

刀型闸阀：产品特点 1、超短结构长度，节省材料，可使管路系统整体重量大大减轻 2、占用有效空间小，能有效支持管道的强度，可减少管道振动的可能性 3、闸板选用奥氏体不锈钢，耐腐性能大大提高，可有效的防止由于闸板腐蚀引起的密封泻漏 4、上密封填料采用柔性 PTFE ，密封可靠、操作轻便灵活 5、闸板具有闸刀的功能，能有效的闸断介质中各类杂物

Dark rod knife gate valve with disc buried in the body cavity is completely isolated from the external environment, it is suitable for pip which is installed in the swage pool and body is immersed in the liquid . If disc is not isolated from external environment ,disc will be corrupted immediately , so it will affects life of the valve.

暗杆式刀闸阀是闸板埋在阀体内腔完全与外界环境隔绝的一种阀门，它适合与那些安装在污水池底下阀体浸泡在液体里的管道，如果不把闸板与外界环境隔离，那么闸板就很快会被外界环境所腐蚀，影响了阀门使用寿命。

For high-speed flow of medium, open the gate in local conditions can cause the vibration Cast Gate, Globe, Check Valves of the gate, but they may damage the vibration damper and the valve seat sealing surface, while the throttling damper will suffer erosion of the medium.

对于高速流动的介质，闸板在局部开启状况下可以引起闸门的振动，而振动又可能损伤闸板和阀座的密封面，而节流会使闸板遭受介质的冲蚀。

The host produces: The wedge type gate valve, the bright pole coal gas gate valve, the gate valve, the electrodynamic balance-like double damper plate gate valve, the box thread gate valve, the bright pole underground gate valve, the electrically operated dark pole wedge type gate valve, seals the gate valve, the knife gate valve, the cut-off valve, the box thread cut-off valve (Japanese-style, Soviet type), to turn on lathe softly opens the type check valve, to risefall the check valve, the noise elimination check valve, to clamp the small dish shape check valve, the vertical check valve, to stand lies the dual purpose check valve, the small dish shape by-pass valve, the by-pass valve, the stopcock, the Three Contacts stopcock, the plunger valve, the ball valve, the flange reed valve.

主产：楔式闸阀、明杆煤气闸阀、闸阀、电动平衡式双闸板闸阀、内螺纹闸阀、明杆地下闸阀、电动暗杆楔式闸阀、软密封闸阀、刀型闸阀、截止阀、内螺纹截止阀、旋启式止回阀、升降止回阀、消声止回阀、对夹碟形止回阀、立式止回阀、立卧两用止回阀、碟形平衡阀、平衡阀、旋塞阀、三通旋塞阀、柱塞阀、球阀、法兰蝶阀。

The bottom of the disc is made of knife-shaped gate with a cut off function of the medium. When gate is closed , oblique plane of gate valve encounters wedge block of gate to achieve sealing effect.

闸板底部做成刀形斜面具有切断介质功能，而且闸板关闭时通过阀体上的锲块紧靠闸板斜切面使得闸板紧紧贴靠阀座密封面，从而起到了密封效果。

Composed of round door frames, gate, rack , sealing strip, adjustable structure of sealing , this kind of sealing principle is door frame is fixed on square pipe of pool and wall, rack is fixed on door frame and wall, through rack opens and closes till weld block of gate meets with weld block of rack to make sealing surface of gate close to sealing surface of door frame to achieve sealing .Besides , sealing of gate and sealing of door frame are made of inlaid copper which is well resistance ,It makes valve with well sealing ,wear resistance , corrosion resistance, easily operation, convenient installation , long life , wildly usage.

本闸门是由圆型门框、闸板、导轨、密封条、可调整密封机构等部件组成，其密封原理是门框固定于水池圆型管道及墙壁上，导轨固定门框与墙壁上，闸板通过导轨做启闭动作，直到闸板上的锲块碰到导轨条上的锲块，使得闸门密封面紧靠门框上的密封面，从而起到密封效果，另外闸板密封面跟门框密封面都是镶铜材质的，具有耐磨损的特性，使得阀门密封密封性好、耐磨性强、耐腐蚀、操作简单、安装方便、使用寿命长、适应性广等特点。

Composed of square door frames, gate, rack , sealing strip, adjustable structure of sealing , this kind of sealing principle is door frame is fixed on square pipe of pool and wall, rack is fixed on door frame and wall, through rack opens and closes till weld block of gate meets with weld block of rack to make sealing surface of gate close to sealing surface of door frame to achieve sealing .Besides , sealing of gate and sealing of door frame are made of inlaid copper which is well resistance ,It makes valve with well sealing ,wear resistance , corrosion resistance, easily operation, convenient installation , long life , wildly usage.

本闸门是由方型门框、闸板、导轨、密封条、可调整密封机构等部件组成，其密封原理是门框固定于水池方型管道及墙壁上，导轨固定门框与墙壁上，闸板通过导轨做启闭动作，直到闸板上的锲块碰到导轨条上的锲块，使得闸门密封面紧靠门框上的密封面，从而起到密封效果，另外闸板密封面跟门框密封面都是镶铜材质的，具有耐磨损的特性，使得阀门密封密封性好、耐磨性强、耐腐蚀、操作简单、安装方便、使用寿命长、适应性广等特点。

The major one was the development of multibore or variable-bore rams, which solved the inherent problem of the ram BOP sealing on only one specific size of tubular goods, Multirams can adapt to different sizes within a limited range—e,g,, between all tubulars with diameters between 3% and 5 in, [8,9 and 12.7 cm].

主要的一个是多孔或可变孔闸板，它解决了闸板防喷器只密封一种特定类型的官状货物的固有问题。多孔闸板可以适应有限范围内不同型号的货物-比如，在所有直径介于3%和5%之间（8，9和12.7厘米）。

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。