查询词典 pipe coupling

Production of intellectual property rights have an independent national patent products - Bergen plates lined with plastic pipe embedded tendons, Bergen licensing stainless steel double-layer steel-lined metal tube, Bergen tendons embedded double-sided plates lined with plastic pipe, condensation-type lined with plastic pipe, steel mesh skeleton reinforced plastic composite pipe, high pressure bi-metallic tubes, thin-walled stainless steel pipes, galvanized pipes are an alternative to traditional ideals of environmental protection pipe.

公司生产拥有独立知识产权的国家专利产品--贝根牌内筋嵌入式衬塑钢管、贝根牌钢衬不锈钢管双层金属管、贝根牌内筋嵌入式双面衬塑钢管、缩合式衬塑钢管、钢丝网骨架增强塑料复合管、高压双金属管、薄壁不锈钢管，是替代传统镀锌管的理想环保管材。

Is one: the petrochemical, chemical, metallurgical, mechanical, electrical, pharmaceutical, light industry and the nuclear industry and other professional services industries, the production of material specifications, heat-resistant steel, resistance Steel mill heat-resistant alloy steel, rare earth wear-resistant steel, high-pressure high-temperature nickel chromium alloy steel: Steel Casting products, high temperatures centrifugal cast pipe casting, centrifugal cast pipe (casting thickness: 5 mm ---- 60mm, outside Drive: 50 mm ---- 1600mm, single-tube products such as super-6 m diameter size of the cast pipe products) tube, cracking furnace tube, and into the furnace, the furnace tube radiation, radiation control, the loser of the ash, the reaction of various Furnace roll, roll bottom, the furnace roll, sank roll, roll stability, and various types of precision casting fixture, heat-resistant steel castings, and Steel Plant for Hot Piercing Plug casting, casting industrial furnace, heat treatment furnace industrial castings , Heat-resistant castings, wear-resistant steel castings, various types of chemical process pumps, plastic alloy centrifugal pump fluoride, fluoride alloy pump, stainless steel pumps, valves, pipe, steel-lined composite of various pieces, all kinds of PTFE Plastic pipe, fin tube heat exchanger, paper, chemicals, light industrial and textile enterprises such as air-conditioning GL Ⅱ type, U-radiators, welding a variety of stainless steel, alloy steel, carbon steel, high-frequency finned tube , Studded tube, sawtooth-shaped fin, and other products of the manufacturing enterprises.

靖江市舒尔机械制造有限公司是一家为：石化、化工、冶金、机械、电力、制药、轻工和核工业等行业服务的专业公司，生产各种材质规格的，耐热钢、耐磨钢耐热合金钢、稀土耐磨合金钢、高温承压高镍铬合金钢：特钢铸造制品、耐高温离心铸管铸件，离心铸管（铸造壁厚：5mm----60mm、外径：50mm----1600mm，单管制品长6m等超大径的铸管制品尺寸）炉管、裂解炉管、转化炉管、辐射炉管、辐射管、输灰管、反应管、各种炉辊、炉底辊、炉内辊、沉没辊、稳定辊、及各类精密铸造工装夹具，耐热钢铸件，钢管厂用热轧穿孔顶头铸件、工业炉用铸件，热处理工业炉用铸件，耐热铸件，耐磨钢铸件，各类化工流程泵，氟塑料合金离心泵，氟合金泵，不锈钢泵、阀门、管件、各种钢衬复合管件，各类聚四氟乙烯塑料管件，翅片管换热器、造纸、化工、轻纺等企业的空调GLⅡ型，U型散热器、焊接各种规格的不锈钢、合金钢、碳钢等，高频翅片管、钉头管、锯齿形翅片管等产品的生产企业。

The results show that the porous pipe quantity, head loss and hydraulic deviation rate of the porous pipe would increase while water head in entrance, pipe length and porous pipe permeability increasing. The head loss mainly concentrated on the top half of the porous pipe.

结果表明，随着进水口压力、管长和微孔渗灌管透水性能的增加，微孔渗灌管水流量、沿程的水头损失和水力偏差率增大，且水头损失主要发生在微孔渗灌管靠近进水口的前半段。

Installation technology and application of the long-distance grp sand pipe;2. drainage pipe and field test of GRP sand pipe construction technology, we draw the conclusion that GRP pipe is applicable for drainage pipe of port engineering.

通过对玻璃钢夹砂管与钢筋混凝土排水管的综合性能比较及对玻璃钢夹砂管施工工艺的现场测试，得出&玻璃钢夹砂管完全适用于港口工程的排水管道&的结论。

The device includes a drill spigot inserting into the marebase sand layer through the upper cover soil layer, there sets air inlet, sand discharging pipe and vibration connecting pipe in the drill spigot; there sets a sand absorption head on the bottom of the air inlet and sand discharging pipe; the bottom of the vibration connecting pipe connects with the vibration head; the sand absorption head is made up of a centre cavity, ring cavity and sand absorption pipe.

该装置包括一穿透上部覆盖土层插入到海底深埋砂土层的钻孔套管，在钻孔套管内，设有进气管、排砂管和振动连接管；进气管和排砂管的下端连接一个吸砂头；振动连接管的下端连接振动头；吸砂头由一中心腔室、环状腔体和吸砂管构成。

This article introduces joint type of copper-aluminum pipe,including straight pipe butted joint,flared pipe insert joint,reducing pipe insert joint and reducing pipe lap joint,and the welding technologies in domestic and abroad,including friction welding,energy storage welding,flash welding,resistance welding,braze welding,cold butt welding and ultrasonic welding.

介绍了铜铝管的接头形式，主要包括：直管对接、扩口管插接、缩口管插接和缩口管搭接；以及国内外的焊接技术，主要包括：摩擦焊、储能焊、闪光焊、电阻焊、钎焊、冷压焊及超声波钎焊等。

The basic thoughts of applying genetic algorithms in pipe network design is: concerning the objectives of pipe diameter, defining the costs of pipe network as objective function, and considering hydraulic situation(continuous equation and cycle equation of the crossover of pipe network), velocity of flow of pipes as restraining elements, this thesis carries out the optimal calculation on the design of pipe network.

运用遗传算法进行管网优化设计的基本思路是：将管网管径作为求解对象，以管网造价为目标函数，以水力条件（管网节点连续方程和环方程）、管段流速作为约束条件进行优化计算。

In this thesis the process of constructing the non-perturbative Hamiltonian theory is de-scribed and is applied to estimate the vacuum condensate. It contains the following contents:At the very beginning, by using the path integral method and eliminating the gluon freedom, aGCM action 〓 of current quarks including lower order current-current coupling was derivedfrom the QCD Lagrangian and the effective Hamiltonian operator that could hardly be doneby the normal methods was derived. After doing this, the broken vacuum is introduced whichincludes quark-antiquark condensate through the generalized Bogoliubov-Valatin transformation,the effective Hamiltonian of constituent quark was derived. The detailed formulas containingthe spatial current-current coupling term for the effective Hamiltonian and gap equations wasworked out by parameterizing the correlation kernel as a quadratic potential. And then, the gapequation was solved and the quark-antiquark condensate of vacuum was studied both in the casesof instantaneous interaction and retarded interaction. In the end, the effective Hamiltionian withtwo-body quark-quark interaction was derived with one-body approximation, and with the helpof the functional integral method the coupling non-linear dynamic equations for systems withnuclear matter was derived. Finally, these equations were solved by selfconsistent method andthe effect of nuclear matter on vacuum condensate was studied. The spatial current-current coupling term is too difficult to handle, hence the correlationkernel is assumed to be not important and usually omitted in the pure vacuum condensate, andthe instantaneous interaction generally is adopted. Retaining the spatial current-current termand partial retardation effect, the quark pairs condensate in pure vacuum was studied, and theeffect of quark mass was also studied. At present, little study is focused in the case with nuclearmatter and spatial current-current term also omitted. Under the approximation with partialspatial current-current term, the effect of nuclear matter on vacuum condensate was studied.

本论文描述了量子色动力学整体色对称模型哈密顿量方法的构建过程，得到了反映正反夸克对凝聚真空结构的关于组分夸克的有效哈密顿量算符，它隐含了胶子作用，并且准确至流-流耦合项；接着，通过参数化哈密顿量中的夸克作用关联核，导出平方禁闭势参数化选择的哈密顿量的具体公式和能隙方程；随后，应用公式，编程求解，考察了瞬时作用下和部分延迟作用下真空的正反夸克对凝聚，在计算中保留了空间流-流耦合作用；之后，导出瞬时势和延迟势下包含二体作用项的哈密顿量公式，并采用单体化近似，通过泛函变分方法得到核物质存在时耦合的非线性动力学方程；在保留部分空间双流耦合作用的近似下，求解核物质的动力学方程，考察核物质密度对真空凝聚的影响，以往考察真空凝聚，对关联核的选用，由于空间流-流耦合项不易处理，也认为作用不大，常忽略该项，并且常采用瞬时作用；本文保留空间双流项和部分延迟作用，考察了真空情形的夸克对凝聚，还考察了夸克质量对纯真空凝聚的影响，以往对核物质存在情形的真空凝聚考察很少，也都忽略空间流-流项，本文在考虑部分空间流-流项近似下，考察了核物质存在对真空凝聚的影响。

WUXI LUDE TECHNOLOGCIAL CO.,LTD., invested by PUN TEH INDUSTRIAL CO.,LTD in 2003, with 28 years of gestation. We have 45000 square meters , first-class modern production and 28 years of accumulated experience in hydraulic coupling ,pneumatic coupling, water coupling and other applications, which create and well versed in all variety of world types ,like European standard, American standard and Asia standard. Also welcome the development and creation of different coupling types. Now our technique have run neck and neck with world industrial advanced countries, building long term OEM cooperation with world brands and having high reputation all over the world.

1980年成立的台湾鹏德工业股份有限公司经过28年的孕育，于2003年投资兴建无锡陆德科技有限公司；占地40000㎡，一流现代化生产，累积28年对油压、空压、水用及各种快速接头经验，创造全世界各式各样的快速接头型式规格：欧洲规格、美洲规格、亚洲规格样样精通；并可以接受各型各样的快速接头的开发与制造，与世界工业化先进国家，先进品牌并驾齐驱，并与世界品牌长期建立OEM的合作关系，享誉国际。

In this topic, the dynamic analysis methods for piezoelectric vibrator are studied systematically based on the theoretical model, FEM numerical experimentation and FEM governing equation for given compound-mode vibrator, and some valuable conclusions are obtained. The main work accomplished is summarized as follows: 1.Elaborate the main modeling methods for piezoelectric vibrator and the significance and necessity to study the dynamic characteristics of piezoelectric vibrator which emphasize the urgency of this paper. 2.Take the bending deformation induced by piezoelectric ceramic as example, the energy transfer mechanism of electric energy to mechanical energy are analyzed; the motion and force transfer mechanism are analyzed for the longitudinal-bending vibrator. 3.Based on mode assumption and Hamilton principle, the coupling model of piezoelectric vibrator of linear USM is built; moreover, the equivalent circuit model is obtained and a coupling equation represents the relation between electric parameters and mechanical parameters is derived which provides foundation to match the vibrator and driving circuit. 4.Combine the constitutive equation of piezoelectric ceramic with elastic-dynamical equation, geometric equation in force field and the Maxwell equation in electric field and the corresponding boundary condition equation, the FEM control equation for piezoelectric vibrator of USM to solve dynamic electro-mechanical coupling field is established by employing the principle of virtual displacement. The equation lays the foundation to study the non-linear constitutive equation of piezoelectric ceramic driven by high-power. 5.Define the dynamic indexes of characteristic of vibrator and carry out variable parameters simulation by calculating the model parameters and the electric characteristics of vibrator are simulated according to the equivalent circuit model. By numerical experimentation, the working mode of vibration of vibrator and the shock excitation results of the working frequency band which provides the mode frequency to realize bimodal are analyzed. Detailed calculation of the electro-mechanical coupling field parameters is made by programming the FEM control equation.

本课题从理论模型、有限元数值试验、有限元控制模型等方面以复合振动模式振子为例对超声电机压电振子的动力学特性及其分析方法进行了全面系统地研究，得出了许多有价值的结论，主要概括如下： 1、阐述了目前针对超声电机压电振子的主要建模方法，对压电振子动态特性的研究意义和必要性进行了论述，突出了本文研究内容的迫切性； 2、以压电陶瓷诱发弹性体发生弯曲变形为例，分析了压电陶瓷通过诱发应变来实现机电能量转换的机理；对基于纵弯模式的压电振子的运动及动力传递机理进行了分析； 3、基于模态假定，利用分析动力学的Hamilton原理，建立了面向直线超声电机压电振子的机电耦合动力学模型，并据此建立了压电振子的等效电路模型，导出了电参量与动力学特性参量的耦合方程，为压电振子与驱动电路的匹配提供了依据； 4、从压电陶瓷的本构方程出发，综合力场的弹性动力学方程、几何方程、电场的麦克斯韦方程以及相应的边界条件方程，采用虚位移原理，建立了压电振子动态问题机电耦合场求解的有限元控制方程，为研究其大功率驱动下的非线性本构模型奠定了基础； 5、界定压电振子的动力学特性指标，对压电振子的机电耦合动力学模型参数进行计算及变参数仿真；依据等效电路模型，对压电振子的电学特性进行了仿真分析；通过有限元数值实验，对压电振子工作模态附近的模态振型及工作频率附近的频段进行了激振效果分析，找出了实现模态简并的激振频率；利用有限元控制方程，通过编程计算，对压电振子的力电耦合场参数进行了详细计算，得出了一些有价值的结论。

There are different types of personal loans available.

有许多不同类型的个人贷款优惠。

The above mentioned teaching model of spiral rising can be used to avoid rigidness in teaching.

上述螺旋式上升的教学模式，可以避免教学形成模式後的僵化现象。