Solenoid magnetic reed force characteristics were analyzed and calculated exercise time

In the textile industry, automatic systems for the production of high-grade jacquard woven jacquard fabric is a precision machinery manufacturing technology , mechatronics technology, computer control technology as one of modern weaving equipment , mainly by electronic jacquard and jacquard looms composition, automatic when operation of the electronic component of the electromagnetic valve jacquard weaving jacquard fabric pattern characterizing the system into a corresponding  2 way manifolds  to enhance the movement of the warp , so the system automatically jacquard weaving crucial actuator . Meanwhile an electronic jacquard generally requires thousands of solenoid valves and solenoid valves in either work 24 hours a weaving system can reliably state action , so the system electromagnetic solenoid  Instrument manifolds  demanding . Earlier, in the Changshu Textile Machinery Co., Ltd. jointly developed electronic jacquard solenoid valve process, we have completed the design and calculation of electromagnetic parameters of the solenoid valve . In this paper, magnetic solenoid valves , spring force characteristics were analyzed and calculated exercise time , and made ​​the choice to explore the dynamic performance and the important parameters of the solenoid valve. Magnetic solenoid valve from the core , yoke and reed composition , while the solenoid valve can be separately analyzed and pull the release position in accordance with the reed .

Butterfly simple structure, small space required for installation

Butterfly simple structure, small space needed to install, easy to operate, with good regulation  2 way manifolds  can be achieved quickly open and close and flow resistance loss when fully open, so widely used. Valve installed in the pipe conduit not only for on-off control, but can also be used for adjusting the flow and pressure pipe. Project  Instrument valve manifolds  aqueduct design, according to the formula in the design flow of hydraulic lines calculated in line with the actual situation, and under low flow conditions calculated residual pressure line there is a big head. Qin Qing Ji to lead pipes, for example, long-distance water pipelines partially completed in phases according to the city water needs.

Inverted siphon pipes buried under the circumstances and height size, arrangement of inverted siphon

Huadu District Water Department in recent years has increased the drainage remediation efforts to ensure the recovery and improve the flow of river irrigation and drainage canal flower functions, taking into account the cross
along the river channel more trunk stream river channel bottom elevation than flowers on both sides of  Instrument valve manifolds  bottom elevation lower branch factors remediation process cross drainage structures across more form with a siphon tube. The overall  2 way manifolds  of inverted siphon siphon tube is when the channel across the valley, rivers, roads and set up channels for the connection of pressure pipelines, such as the shape of an inverted siphon pipes buried under the circumstances and height size, siphon tube into the arrangement shaft, inclined tube, curve type, and bridge and other types of furnishings.

Tightening torque deformation under the action of the compatibility equation connecting thread

According to the design of the actual working conditions underground wells tied back and re-entry device , designed for re-entry device tieback and the structural model to determine the major mechanical problems to be solved . Re-entry device, the load transfer between the sleeve threaded connections rely on to achieve this end , the establishment of a preload force of the re-entry device connecting thread mechanical model is derived under the pretension deformation compatibility equation  High pressure ball valve  , the use of a dedicated software program prepared by its approximate solution is obtained , so as to carry out the thread , threaded joints and the contact face of stress analysis and strength check laid the foundation for this new type of connection thread structure design and  2 way manifolds  provide a theoretical basis . In addition, the proposed device oval tieback casing forming a nonlinear finite element model and the double casing downhole branch  5 way manifolds  element analysis model . Oval tube plastic deformation in order to obtain the nonlinear characteristics of the finite element analysis software uses two different methods to study the round casing in a non- uniform deformation under load and stress state , and to determine the steel casing material springback deformation after the plastic deformation is very small .

Rope diamond core drilling technology

Wireline diamond core drilling technology in China for more than 30 years of application history, has formed a relatively complete drilling processes and procedures. But the rope coring drill to maintain the original structure and the strength of the basic level , drill low intensity, short service life , operational reliability is poor, deep hole drilling accident rate , drill pipe break accidents have occurred , can not meet the mineral exploration rope core drilling needs. In order to meet future mineral exploration and development, narrowing the gap with foreign countries , we have a diamond coring drill string and rope  Instrumentation ball valve  for the study of its structure, size, thread and other aspects of the geometric parameters of depth theoretical analysis, mechanical model for simulation optimization , and strive to make our rope coring drill pipe design and application to achieve a high level. Statics using finite  Valve manifolds  , by means of the current international general finite element analysis software ANSYS rope coring drill to establish three-dimensional static finite element  2 way manifolds  model . Qualitative simulation drill pipe and fittings threaded in the working state of stress and strain distribution of such displacement field . Through structural statics study and explore the life of the main factors restricting the drill pipe . To contact the nonlinear finite element theory, the connecting thread for drill pipe joints for detailed theoretical analysis .

FEM structure on the basis of the actual construction conditions for compliance improvements

Floating Production Storage and Offloading Tanker (FPSO) is a tanker offshore structure shape , compared with ordinary oil tankers , FPSO will withstand more severe loading conditions , and thus its hull structure should have a special durability and fatigue fracture strength to ensure that the location of the job continue to work  Valve manifold  to the production requirements of more than 40 years until the end of oil exploration . According to the survey of damaged FPSO injury , openings and through the horizontal longitudinal frame at the connection node and other structures are prone to fatigue damage of the site, it is necessary in the finite element numerical calculation based on the structural form of realistic 2 way manifolds of the construction conditions . FPSO tanker loading and unloading more frequently than , so loading and unloading on the hull caused by the low- cycle fatigue damage can not be ignored . Due to structural nodes in the design or production of an  Instrument valve manifolds  , supervision and management and other aspects of vulnerability , or encountered a typhoon and other adverse sea conditions , the FPSO hull structure will crack. Crack initiation at the weld toe early stages of sanding through the crack repair methods , you can achieve the purpose of extending the fatigue life of the structure . Current international and domestic fatigue strength for FPSO research work focused on how to prevent cracks on the structure for cracks after studies conducted are less.

Thread connection load transfer law

Oil drill male thread root portion due to severe stress concentration in the complex alternating loads , easy to crack initiation , resulting in joint fatigue fracture due to the complex structure , difficult to find a variety of crack fracture strength of the analytic expression patterns generally only be solved numerically . thread contact in three-dimensional calculation is extremely complex, this paper proposes a simplified calculation model gives a reasonable load transfer  Instrument valve manifolds  rules . Using three-dimensional finite element displacement method , more systematic study of the root portion of the male thread with semi-elliptical surface crack in a variety of load stress intensity factor variation . Male thread root for predicting crack after carrying capacity and remaining life , establishing flaw detection cycle , the development of waste sub- standard ,  2 way manifolds  the necessary fracture analysis parameters . Second, the calculation method simplified model of thread contact connection state oil drill pipe joints loaded. Calculating three-dimensional contact with the thread is very complicated and expensive , is not conducive to engineering applications .  Valve manifold , this article assumes the role by the torque T , the thread contact between teeth without the circumferential direction relative slip ; subjected to internal pressure , tensile and bending loads , the contact between teeth without radial relative sliding .

Commercial CFD software research and internal flow check valves

From the study of fluid flow valve mechanism departure, using numerical simulation valve internal flow, numerical simulation results to guide the design of the valve has  2 way manifolds  an important research direction. Numerical simulation tools, one can save test resources, shorten new product development time; hand it can display is difficult to draw from the test flow characteristics in detail. In this paper, commercial CFD software research and internal flow check valve, mainly to do the following tasks: outlines the current situation and the check valve design  Valve manifold  fluid  Instrumentation ball valve  the check valve in the common software applications. Details of the basic theory and computational fluid dynamics method, the calculation method for solving algebraic equations and a variety of mesh generation techniques. Finally, multi-channel Ball Check Valve internal three-dimensional incompressible turbulent flow was simulated, and the results are experimental verification.

Shuttle valve impact, no noise, good sealing performance

Also known as one-way valve or check valve, check valve, and its role is to prevent the media back in the pipeline, it is widely used in petroleum, chemical, thermal network, metallurgy and water pipelines and  Instrument needle valve . Currently, swing check valve can not perfectly sealed, there is tendency to pour, easy to produce pipe vibration can not be installed at any angle, and sealed contact surfaces are  2 way manifolds , but such invention by a Mr Tsang Wai-impact small shuttle valve , no noise, good sealing performance, the soft seal leakage is zero, with good prospects for industrial development. Software as today's most reliable structural nonlinear,  Instrument manifolds  calculation system, its stable nonlinear problem solving, multi-physics simulation and other functions has been in global leadership. Text around large caliber (diameter not less than 200 mm) shuttle check valve Swing check valve with FSI performance numerical analysis carried out to the software as a platform to establish fluid-structure interaction finite element model of the pipeline flow field dynamic analysis.

Check valve characteristic curves called dynamic

Piping system the most important role is to avoid the check valve pipe machinery and mechanical equipment damaged by water hammer. Pump stops unexpectedly when the liquid flow rate decreases, the check valve gradually off small; short period of time, accelerate the flow of liquid begins to reverse, accelerated closure valve in closed  2 way manifolds , reverse liquid flow rate reaches vmax the valve closed, the flow rate of the reverse flow of liquid from the vmax to 0 immediately, immediately downstream of the check valve to produce water hammer pressure value H, and  Instrument valve manifolds  effect, affect the life of the pipeline equipment usually the check valve of the curve called dynamic characteristic curve of the valve closed curve is generated when the water hammer effect has an important role in the project is also taken to prevent or measures to reduce water hammer damage theoretical basis. currently there are many scholars valve dynamic characteristics were studied theoretically describes the dynamic characteristics of the check valve and spring on them.