阀罩

抽油泵活塞上阀罩的改进与使用

Research and application of topside valve house of pump plunger

抽油泵高效固定阀罩的研制与应用

Development and application of the standing valve cover

抽油泵柱塞防断上阀罩的研制与应用

Development and application of break prevention top valve housing for oil well pump plunger

几种抽油泵闭式阀罩

Closed Valve Bonnets in Sucker Rod Pumps

室外机组阀罩注射模设计

Design of Injection Mold for the Topside Valve on the Machine Groups Outer of House

该泵采用了旋转接头、螺旋阀罩、柱塞总成、刮砂器于一体的多功能防砂结构，具有排而不卡和漏失量小的特点。

The pump consists of swirl nozzle , valve cover , plug assemble and sand scratcher .

该防断上阀罩改变了标准型上阀罩结构设计，延长了使用寿命。

It varies the structural design of standard type top valve housing , and extends the lifetime .

这种抽油泵采用等径柱塞，上游动阀罩内无阀球，仅通过螺纹与柱塞上部连接；

The pump adopts isodiametric plunger , and there is no valve ball in its upper traveling valve housing .

标准型抽油泵柱塞上阀罩的工作缺陷是出油孔壁磨损断裂。

The shortcoming of top valve housing for standard type oil well pump plunger is wear and rupture of oil flow pore wall .

本实用新型可防止抽油泵在采油过程中上排出阀罩出油孔筋柱裂断，提高抽油泵的使用寿命，降低采油成本。

The utility model can prevent the discharge-orifice steel columns of the upper draining valve cover from cracking , increase the service life of oil-well pumps , and lower oil-production cost .

文章分析了导致中高油气比油井泵效较低的原因，针对普通固定阀罩存在的缺点，对其结构进行了改进。

This paper presents the analysis on the reasons of the lower pump efficiency in the higher gas-oil ratio well , aiming at the shortcoming of common standing valve cover and the conventional structure improved .

通过对阀罩结构进行工艺分析，设计了一副结构紧凑、简单合理、便于使用成型的注射模，介绍了该模具的特点。

Over analysis of the process of topside valve structure , a pair of mold with strict , simple and feasible structure to be used and moulding easily is designed , and the mold 's characters are introduced .

HVDC换流阀系统屏蔽罩的电场分析和电容参数提取

Electric Field Analysis and Parameter Extraction of Shielding Cover of HVDC Converter Valve System

主要对3MД型煤气发生炉中的水力逆止阀及钟罩阀进行了改进。

Abstract : The improvements both back valve and bell-jar valve of hydraulic power for coal gas producer type 3m Д were mainly made .

为了减小加工工艺对EP阀工作性能的影响，磁铁和阀罩的同轴度应控制在8级，铁芯外径表面粗糙度应抛光至0.8μm。

In order to lessen the effect of the machining process , the coaxality between valve head and iron core and surface roughness of iron core should be controlled within level 8 and 0.8 m respectively .

影响出油孔壁断裂的主要因素是阀球撞击的不确定性，在分析阀球碰撞时对上阀罩产生影响和上阀罩结构缺陷的基础上，设计了此防断上阀罩。

The main factors of influencing pore wall rupture is the indeterminate valve ball impact . On the basis of analysing the effect of valve ball impact on top valve housing and the structural shortcoming of top valve housing , the break prevention top valve housing is designed .