原文：
           装设在离心泵出水管上的新型多功能水泵控制阀同时具有闸阀、逆止阀、水锤消除器三种功能。本文介绍了多功能水泵控制阀的构造、性能参数、工作原理、安装调试、注意事项。

        一、功能要求 离心泵是给排水工程中最常用的一种水泵，通常为了保证水泵的正常运行，在水泵的出水管上根据需要装设有闸阀、逆止阀以及水锤消除器三种阀件，这三种阀件在水泵的运行过程中分别起着不同的作用：闸阀平时是处于关闭状态，减压阀水泵启动时闸阀慢慢打开，水泵停机时，闸阀先慢慢关闭。水泵的闭闸启动和闭闸停车，可以有效的防止开泵水锤和停泵水锤，同时，减少了水泵启动时的电机负荷，水泵在零流量时的轴功率最小，一般仅为设计轴功率的30％。闸阀的另一个功能是，当闸阀关闭时，可以为安装在闸阀与水泵之间的逆止阀等阀件和水泵提供安全的检修条件，防止压水管的水回流；逆止阀能防止突然断电时所造成的水流的流向改变，防止倒流；但是，逆止阀的突然关闭易产生水锤现象。在水泵的几何扬水高度较大时，严重的水锤瞬间高压会导致管道破裂，发生严重的生产事故。防止水锤对输水管道的破坏方法，往往在水泵的压水管上安装水锤消除器。过滤器为了实现水泵运行的自动化，简化管理，减轻劳动，提高可靠性，人们用水力阀门和电动阀门取代手动阀门，对单体阀门进行多项技术改进，出现了缓开缓闭逆止阀、缓动启闭水力阀门、自动缓闭闸阀、双速自闭阀等新型阀门。 以上措施在应用实践中取得了一定的效果，但仍不尽人意，使用压力传感和电气传动控制复杂故障较多，单一阀门的改进不能解决自动运行的主要问题。所以，人们一直致力于研制一种同时具有闸阀、逆止阀和水锤消除器三种阀件功能的阀门，在减少占地的同时满足上述综合要求。JD745X型多功能水泵控制阀是其中较好的一种，液位计它具有一阀多能、运行可靠、简化操作、便于维护，能按水泵的操作要求自动运行的优点，很受到用户的欢迎。 该型多功能控制水泵阀的工作压力分1．0MPa和1．6MPa、2．5MPa三种，动作压力大于或等于O.1MPa，介质温度在0－－80℃，缓闭时间可在3-90s内调节，管道流速2m／s时的压力损失小于0．01MPa，水锤峰值小于1．5倍的工作压力，公称口径DN50-DNl0000。

           二、基本构造 阀门的总体尺寸与普通逆止阀相当，由主阀和外装附件组成。其中，主阀包括阀体、压板及膜片、大阀板、缓闭阀板、阀座、阀杆组件等部件。缓闭阀板用阀杆组件与压板及膜片连接一起，膜片压紧在阀盖与膜片座之间，膜片的上下运动带动缓闭阀板上下升降。阀杆穿过大阀板的中心孔，因之大阀板可以在一定的范围内沿阀杆滑动。平时，大阀板在自重和上部压紧弹簧的压力下压紧在阀座上，使阀门处于关闭状态。多功能水泵控制阀的外装附件安装在阀门膜片两侧与阀门进、出水管上，膜片的下腔与阀门进水侧的连接管上装设控制阀、过滤器和一只特制的逆止阀。膜片的上腔与阀门的出水侧的连接管上只设过滤器和一只控制阀。主阀内大阀板和缓闭阀板的运动和所处的位置决定了特殊阀门阀门工作状态的变化和启闭。阀门的外装附件和管路随时把阀门前后的压力变化传递到阀门内由膜片分成的上腔和下腔，控制大阀板和缓闭阀板的运动，并可以通过调整附件改变大阀板与缓闭阀板的运行速度，使阀门的开启与缓闭时间处于规定的范围内。

           三、工作原理 多功能水泵控制阀在水泵的启动－－关闭时是自动工作的，以下分别阐述其工作过程原理： （1）停泵状态，阀板在出口端及隔膜上腔静压作用下全部关闭。 （2）水泵启动时，水压从旁通管传人下腔，主阀板及缓闭阀板在进口端及下腔水压作用下缓慢开启。 （3）在进水端压力作用下，阀板上升到最大开口状态，开口高度由流量决定。 （4）停泵瞬间，流量及压力突然降低，主阀板在重力作用下开始向下滑蒋。 （5）当流量接近于零时，主阀被关闭，主阀板上留有泄流孔以减弱水锤冲击力；主阀板上、下形成压力差，阀门出口水压从旁通管进入上腔推动膜片压板，使下腔水排人阀门进口，缓闭阀板开始缓闭。 （6）缓闭阀板完全关闭泄流孔，阀门回到停泵初始状态。 四、安装调试 在水泵多功能控制阀安装前，首先应检查主阀是否完好，紧固件应无松动，附件是否齐全。然后，按多功能控制阀的安装图进行安装。 要注意控制管路接入主阀的位置和管路上阀门的工作状态。有逆止阀的一条控制管，一端接人膜片下腔，另一端接人阀的进水管。泵另一条控制管的一端接人膜片的上腔，一端接入阀的出水管；图3中的调节和控制阀应全开。 主阀宜水平安装，并注意阀体外的指示方向应与水流方向相同，不得反装。阀盖与膜片座上排气阀和泄水阀是首次多功能控制阀使用时排气和泄水用的，平时处于关闭状态。根据使用情况，可用调节阀调整主阀的开启和关闭速度。 调试中如发现主阀打不开，应仔细按图3对照，检查控制管是否接好；控制管上应打开的阀门是否已经打开，过滤器有否堵塞。 当发现主阀关闭不严时，首先也应检查控制管的安装位置和管路上的阀门；若主阀反复开启和关闭数次后，水泵仍有反转现象，则表明阀内有异物或阀板损坏；膜片控制室的下腔排气、进气也有水流出，可断定膜片损坏。

“ New Multifunctional Pump Control Valve principle Profile ”是由中国控制阀网提供的阀门行业新闻，译文仅供参考。另外，中国控制阀网还提供相关产品搜索： 手动控制阀、 核用控制阀、 智能控制阀、 自动控制阀、 水力控制阀 等。

译文：
         Installed at the pump outlet pipe on the new multi-functional water pump control valve also has a gate valve, check valve, water hammer eliminator three functions. This article describes the construction of multifunctional pump control valve, performance parameters, operation principle, installation, pay attention. First, functional requirements Centrifugal pump is the most commonly used for drainage of a pump, usually in order to ensure the normal operation of pumps in the pump's outlet pipe on the basis of need for the installation of a gate valve, check valve and water hammer eliminator three types of valves, The three valves in the pumps were running the course plays different roles: valve usually is in a closed, slowly open the valve when the pump starts, pump shutdown, slowly close the valve Xian. Pump closed gates closed and parking brake boot, can effectively prevent water hammer and open the pump Water hammer, while reducing the pump motor load at startup, when the pump flow rate at zero minimum shaft power, the general design axis only power of 30%. Another function of gate valve, when valve is closed, can be installed in the valve and pump check valve between the valve and pump, etc. to provide a safe maintenanceBellows Seal Valves conditions to prevent the water pressure return pipe; check valve to prevent a sudden power outage caused by changes in the flow of water to prevent backflow; However, the sudden closure of check valve is easy to produce water hammer. Geometry in the pump when pumping a high degree of large, serious water hammer pressure can cause pipeline rupture moment, serious industrial accidents. Prevent water hammer damage to the pipeline method, often the pressure of water pump install water hammer eliminator. In order to achieve automatic pump operation, simplify management, reduce labor, improve reliability, force people to water valves and replace the manual valve electric valve on the monomer valves were a number of technical improvements, there has been slow to open Slow Close Check valves, hydraulic valves open and close slowly moving, auto slow closing valve, the two-speed self-closing valves, and other new valve. Practice in the application of these measures have achieved some results, but still unsatisfactory, use of pressure sensing and electrical transmission control more complex faults, a single valve to improve not solve the main problems automatically. Therefore, it also has been working to develop a gate valve, check valve and water hammer arrester Butterfly Valvesvalve function of three valves in the reduction of the land, while meeting the comprehensive requirements. JD745X multifunctional pump control valve is one good Di, which are with One valves an Neng, Yunhangkekao to simplify operations, easy for maintenance, can pump the operation Yaoqiu An automatic run of You Dian, very popular with its users. The multi-functional water control valve working pressure points 1.0MPa and 1.6MPa, 2.5MPa of three, action pressure greater than or equal O.1MPa, medium temperature 0 - 80 ℃, slow closing time in 3 -90s within the regulator, pipe flow velocity 2m / s, pressure loss is less than 0.01MPa, water hammer peak is less than 1.5 times the working pressure, nominal diameter DN50-DNl0000. Second, the basic structure The overall size of the valve and check valve fairly common, from the main valve and the composition of exterior accessories. Among them, the main valve, including valve, pressure plate and diaphragm, a large valve plate, slow closing valve plate, valve seats, valve stem component and other components. Slow closing valve plate and the plate and diaphragm stem components connected together, diaphragm compression in the valve cover between the seat and diaphragm, the diaphragm moves up and down the board under the drive slow closing valve lift. Large valve stem through the center hole plate, consequent large valve plate to a certain extent along the stem slide. Normally, a large valve plate and the upper compression spring in the weight under the pressure of compression in the seat, so that the valve is turned off. Multifunctional Pump Control Valve exterior accessories installed in the valve diaphragm and the valve into the side, outlet pipe, the diaphragm and the valve inlet side of the inferior vena connection pipe installed control valves, filters and a special valve. Membrane of the chamber and the valve connecting the water pipe on the side of the set only and a control valve filter. Large valve plate main valve closed valve plate gentle movement and determine the location of the work of state changes and the valve opening and closing. Valves and piping exterior accessories at any time before and after the valve pressure transmission to the valve within the cavity by the diaphragm into the upper and lower chamber, the control valve closed a large valve plate plate moderate exercise, and can be adjusted by changing the large attachments valve plate and the slow speed valve plate closed, so that relief valve is opened and closed at a specified time range. Third, the working principle Multifunctional Pump Control Valve in the water pump start - shut down automatically when the work is, explainCheck Valves the working process the following principles were: (1) state the pump stops, the valve plate and diaphragm at the exit static pressure on the cavity under the action of all closed. (2) pump starts, the pressure chamber from the bypass pipe under the transmission, the main valve plate and the slow closing valve plate in the inlet and the inferior vena slowly open under hydraulic pressure. (3) in the water-side pressure, the valve plate to rise to the maximum opening state, the opening height of the decision by the flow. (4) transient pumping, flow and pressure suddenly drops, the main valve plate began to fall under gravity Chiang. (5) When the flow is close to zero, the main valve is closed, the main discharge valve plate left holes to weaken the impact of water hammer; main valve panel, formed under the pressure difference, valve outlet pressure from the bypass pipe to promote the diaphragm plate into the cavity so that the water drained under the valve chamber imports slow start slow closing valve plate closed. (6) Slow closed discharge valve platePlug Valves is completely closed hole, stop the pump valve back to the initial state. 4, installation and commissioning Multi-function control valve in the pump before installation, should first check the main valve is intact, there should be no loose fasteners, attachments are complete. Then, press the multifunction control valve installation diagram to install. Pay attention to controlling access to the main pipeline valve location and pipeline valve in the working state. Have a check valve control tube, a termination under one diaphragm chamber, the other end were the inlet valve. Another person control the management of a termination of the diaphragm chamber, one end of the access valve outlet pipe; Figure 3 in the regulation and control valves should be fully open. The level of the main valve should install, and note the direction of the outside body and the flow direction should be the same, not anti-installed. Diaphragm valve cover and exhaust valve seat and the vent valve is the first multi-function control valve and the exhaust outlet when used with, and usually turned off. According to usage, can be used to adjust the main valve control valve opening and closing speed. Commissioning of the main valveSafety Valves is found to be opened, should be carefully controlled according to Figure 3, check whether the access control tube well; control pipe valve should be open if already open, the filter has blocked. When they find the main valve closed strictly, the first control tube should check the installation location and pipeline valves; if the main valve to open and close several times repeated, the water pump still reverse the phenomenon, it indicates that a foreign body or valve disc damage; diaphragm control room of the inferior vena exhaust, intake is also flowing out can be concluded that membrane damage.

原文来源：http://www.1kongzhifa.com/

2010-08-31 07:17

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