译文：
紧急关闭阀是近几年开发出来的新产品。在工程中应用正在不断增多。在安装调试过程中，我们也发现了一些问题，有一些是施工上的问题，有一些是设计上的问题。一个好的产品不仅产品本身的质量要好，最重要的是应该让大家了解它、熟悉它、合理地使用它，才能发挥它的{zd0}的作用。 为什么要使用紧急关闭阀 大家知道，历来消防管网和生活管是两个供水系统，由两个泵组分别供水，从泵房到大楼很长一段距离由二路管道供水。这样因敷设二路管道施工工作量较大，管路材料多一倍，以及维修时辨认某一根管道也有诸多不便；第二，消防管道长年不使用，容易生锈，管壁和接口因腐蚀减薄，平时不用没有压力，而一旦发生火警，管道内突然压力增高，容易爆裂，致使消防系统不能供水。第三，上海提倡水泵直接从市政管网抽水，不再设置地下水池。这样既省去了水池建造的费用，同时避免了水源的二次污染。保持了水源的清洁卫生，保证人民的健康这是最重要的一条。由于有这几方面的优点，所以这一产品正逐渐地受到大家的欢迎。 紧急关闭阀的工作原理 紧急关闭阀是水力控制阀中的一种。是由主阀、节流阀、导阀、压力表以及接管等其他管件组成。当主阀进口压力低于导阀设定的压力时，导阀此时处于开通状态，主阀上盖腔内压力与主阀出口压力相等，进口与出口存在压差，水流经阀口由出口流出。当消防泵起动，或变频泵压力升高，超过导阀设定压力时，由主阀进口通向导阀控制管压力升高，作用在弹簧上的压力增大，向下压紧，带动阀芯下移，使导阀关闭，此时主阀进口压力通过节流阀不断补充到主阀阀盖上腔，因阀瓣受到的向下的压力大于向上的推力，主阀关闭。请大家注意的关键点是，进口压力小于设定压力该阀一直处于开启状态，进口压力大于设定压力，该阀处于关闭状态。现在有很多设计人员误以为只要装了紧急关闭阀，它就会关，不用讲什么条件，那就错了。 工程中存在的问题 我们在实际安装调试过程中遇到许多不合理的地方，提出来供讨论。位于上海浦东羽山路有一住宅区。这一住宅区泵房间位于地下，楼高三幢十二层和二幢八层，层高2.8米，生活泵消防泵均是DN80，生活泵扬程53米，消防泵扬程60米、流量10L/S，供水分五路，DN80管进入屋顶水箱。由DN80的水泵同时供五路DN80的水管，因此水压不高，只能勉强进入水箱。紧急关闭阀把压力设定在0.5MPa，同时供五路水，压力不会超过0.5MPa，只能对水箱补水。但是，如果有四个水箱已满，水箱上的液面控制阀关闭，只剩下一个水箱水不满仍需补水，此时压力就会升高，超过0.5MPa，紧急关闭阀就会关闭，剩下的一个水箱就不能补水了。为了让每一个水箱都能顺利补水，就需要把压力稳定在0.45MPa，使之小于0.5MPa，才不会造成关闭。这就需要在生活泵上加一台泄压阀。现在大多数单位，生活泵上不设泄压阀。有的单位使用了电接点压力表，当水压升高超过0.5MPa时自动跳闸，水泵停止运转，这样仍然解决不了单个水箱的补水问题。 第二个问题是当消防泵起动时，所有的紧急关闭阀处于开启状态。DN80水泵分五路DN80水管，此时如果水箱里水不满，水压就上不去，不可能超过0.5MPa，直到水池灌满，液面控制阀关闭，压力才能升高。这里设计者就应考虑增大水泵容量，或者减小水管口径，两者至少应相差二档，如水泵改为DN100，五路水管改为DN65，此时的压力才能超过0.5MPa，起到关闭作用，才能把消防水往大楼里送。再举例，在上海控江路上有一住宅小区DN100消防泵，六路水管DN80，仍然不能关闭，所以水泵和多路供水管应相差二档为宜。 第三个问题是，水泵房的排水系统，泄压阀排出的水应排入消防水池或下水道，不应排在狭小的明沟里。还是举上面的讲述的例子，在调试时五路水管，一路一路逐步关闭，结果水泵里的水抽出来全部由泄压阀泄放在地下室，排水泵远小于消防泵，地下泵房结果被淹。{zh0}的方案是生活泵和消防都采用变频泵，调试时水压恒定不受流量的影响。或者用定量泵加泄压阀也可以，但泄压阀必需用水管联到水池或下水道，下水道口径比进水管大一至二档。紧急关闭阀阀后直通用户的方案比较好。在消防管网和生活管网间宜增加一个防污隔断阀，以防消防水回流污染生活用水。 第四个问题，安装位置的选择。到目前为止，多数用户把紧急关闭阀安装位置放在喑井内。有一家用户把紧急关闭阀设置在楼梯下，我认为放在楼梯下比较合理，便于调试和维修。如放在喑井内应留有足够的维修空间，有的喑井面积只有40×60cm2，而且有1米多深，空间太小维修人员根本无法调试。并且阀的两端没有伸缩节或软接头，如果需拆下维修就无法再装上去。建议喑井面积60×80cm2，深度不宜过深，以井盖加盖后不碰阀门为宜。另外，需加软接头或阀门有一头接弯头。 第五个问题，管路在启用前应冲洗干净。我们在调试过程中发现紧急关闭阀不能关闭，排除了压力的因素外，怀疑有小石子在阀体内存留，经检查12台阀门多数有小石子存留，其中有两台把阀体的下腔塞满了。所以在安装紧急关闭阀前应清洗管道，才能保证所有的阀门正常工作。

“ emergency shut-off valve works with the five notes ”是由提供的国际阀门新闻，译文仅供参考。另外，中国旋塞阀网还提供相关产品搜索：、、、、等。

原文：
Emergency shutdown valve is in recent years developed a new product. In engineering applications are increasing. In the installation process, we also found a number of issues, there are some construction problems, there are some design problems. A good product not only to better the quality of the product itself, the most important is to let everyone know it, know it, and the rational use of it, in order to play its biggest role. Why the use of emergency shut down valve As you know, has always been the fire pipe network and life management are two water supply systems, water supply by two pumping systems, respectively, from the pump to the building for a long distance from the Road to piped water. Road due to the laying of such a large workload of pipeline construction, pipeline materials, double, and maintenance of a pipeline when the identification is also a lot of inconvenience; second, fire pipes for many years not to use, easy to rust, wall panels and interfaces for corrosion thinning, usually do not have no pressure, while the case of fire, a sudden pressure increase inside the tubes, easy to burst, resulting in fire system can not supply. Third, the Shanghai to promote pump pumping directly from the municipal pipe network is no longer underground pool. This will not only eliminate the cost of the construction of the pool, while avoiding secondary pollution of the water. Maintaining the cleanliness of water sources to ensure people's health is the most important one. Because of the advantages of these areas, so the products are gradually being everyone's welcome. Emergency shut-off valve works Emergency shutdown valve is in a kind of hydraulic control valve. Is from the main valve, throttle, guided valves, pressure gauges and other pipe fittings formed to take over. When the main valve inlet pressure below the set pressure valve guide, the guide valve is turned on at this time, the main valve cover chamber pressure and the main valve outlet pressure equal to, import and export existing differential pressure, flow through the valve port by exports out of . When the fire pump starting, or pump-pressure increases, more than lead valve set pressure, the import pass by the main valve guide valve control pipe pressure increases, the role of the spring on the pressure, pressed down to drive spool down, so that guide valve closed, this time the main valve inlet pressure through the throttle valve continuously added to the main valve cover chamber, due to valve flap downward pressure being greater than the upward thrust, the main valve closed. Please note that the key point is that the inlet pressure is less than set pressure of the valve has been turned on, inlet pressure is greater than set pressure, the valve is turned off. There are so many designers to the misconception that as long as the emergency shutdown valve installed, it will pass, do not say what conditions, it would be wrong. Engineering problems We have encountered during the actual installation and testing of many unreasonable to propose for discussion. Plume is located in Shanghai Pudong Road there is a residential area. The residential area pump room on the ground floor, three-storey and two eight-story 12-layer, layer of 2.8 meters, living pumps fire pumps are DN80, life pump head 53 meters, fire pump head 60 meters, flow rate 10L / S , water supply sub-Wu Lu, DN80 pipe into the rooftop water tank. From DN80 pump at the same time for the Wu Lu DN80 pipe, so pressure is not high, barely into the tank. Emergency shutdown valve to the pressure set at 0.5MPa, while for the Wu Lu water, pressure, no more than 0.5MPa, could only supply water to the water tank. However, if there are four water tank is full, liquid level control valve on the tank off, leaving only a tank of water still dissatisfied with pay, at this time the pressure will rise, more than 0.5MPa, emergency shut-off valve will be closed, The remaining one can not recharge the tank. In order to smoothly supply water tanks for every one, we need to be stable at the pressure 0.45MPa, so that is less than 0.5MPa, will not lead to the closure. This requires that pumps life add a pressure relief valve. Most units now, life is not set pump pressure relief valve. Some units use the electric contact pressure gauge, when the water pressure is increased automatically when the trip exceeds 0.5MPa, water pumps stop functioning, so that a single tank is still not solve the problem of replenishment. The second problem is when the fire pump start, all of the emergency shutdown valve is open. DN80 pump sub-Wu Lu DN80 plumbing, this time, if dissatisfied with the tank water, water pressure would not increase, unlikely to exceed 0.5MPa, until the pool filled, liquid level control valve closed, pressure can rise. Here the designer should consider increasing the pump capacity, or reduce the pipe diameter, the two should be at least a difference of two files, such as water pumps replaced DN100, Wulu pipes replaced DN65, at this time the pressure can be more than 0.5MPa, since to close the role, in order to bring the water to the building fire service delivery. Another example, in Shanghai, there is a residential district Kongjiang DN100 fire pump, six road pipe DN80, still can not shut down, so multi-channel pumps and water pipes should be a difference of two files is appropriate. The third problem is that the drainage system pump house, pressure relief valve discharge water should be discharged into the fire pool, or sewer and should not be ranked in a narrow ditch Ming. Or to cite the example described above, in the debugging Wu Lu pipes, all the way all the way to gradually shut down, resulting pump the water out of wholly on the pressure relief valve to vent the basement, drainage pump is far less than the fire pump, underground pumping station results flooded. The best option is to pump life and fire safety have adopted variable frequency pump, when debugging is not a constant pressure flow. Quantitative pumps or pressure relief valve can also be added, but the pressure relief valve necessary to the pool or in conjunction with the sewer pipe, sewer diameter than the inlet freshman to second gear. After the emergency shutdown valve valve through the user's program is better. Pipe network and live in fire between the pipe network is advisable to increase an anti-fouling cut off valve to prevent the return of contaminated fire water for domestic use. The fourth question, the installation location of choice. So far, most users the location of emergency shutdown valves installed on the dumb wells. There is an emergency shutdown valve users to set up the staircase, I think on a more reasonable under the stairs for easy commissioning and maintenance. If on the dumb wells should allow sufficient space for maintenance, and some dumb well an area of only 40 × 60cm2, and has more than 1 meter deep, space is too small maintenance staff simply can not debug. And valves at both ends there is no expansion joints or soft joints, if the required repairs can not be removed again Zhuangshang Qu. Proposed dumb Wells area 60 × 80cm2, the depth should not be too deep to seal covers do not touch after the valve is appropriate. In addition, the need to add flexible connector or valve with a pick elbow. The fifth issue, piping should be washed clean before opening. Debugging process, we found that emergency shutdown valve can not be closed, eliminating stress factors, suspected to have gravel in the body of memory to stay, after checking the valve 12 the majority of Taiwan have gravel retention, including two to the next body cavity filled. Therefore, the installation of emergency shut down valve should be cleaned before the pipeline, in order to ensure that all the valves work properly.
原文来源：