Protective system for pressure limiting valve, which is characterized by a pressure limiting valve and water protection valve which are connected in series, the pressure limiting valve and water protection valve are respectively arranged on the water inlet and outlet, wherein the pressure limiting valve is communicated with the water outlet protection valve water inlet, outlet pressure is less than the water pressure limiting valve the protective valve allows the pressure; the pressure limiting valve and water protection valve cavity are provided with water inlet and outlet is communicated with the channel, and can make the pressure cavity and water cavity component isolation; the water channels are arranged in the sealing nozzle, and a pressure limiting assembly with the control rod assembly is arranged in the water channel and by moving the control rod assembly and sealing sealing nozzle, the formation of water channel gradually cut off, so as to protect the safety of the pressure limiting valve. The invention can rapidly cut off the waterway when the pressure limiting valve fails, and once closed with the seal opening, it can not be reopened, thus protecting the safety of the pipe network and the equipment, and giving the maintenance signal at the same time.
【技术实现步骤摘要】
本专利技术涉及一种阀体保护系统,尤其涉及的是一种在自来水供水管网及净化 处理系统中的限压阀的保护系统。
技术介绍
在现有技术的供水管网中,水压时有波动,供水管网及居民用水设备常面临 耐压安全隐患。在通常的应对措施中,减压阀是最为普遍的,采用减压阀可以把较高的水压 降低,从而降低水流的压力。减压阀的种类较多,包括膜片式、活塞式、波紋管式 限压阀,上述三种限压阀工作原理完全相同,只是限压组件有差异,为叙述简便, 以下以膜片式限压阀为例进行叙述。膜片式限压阀在实际使用过程中,容易在以下几方面产生故障1、 弹簧易碎断,此种情形有可能使限压阀失去限压功能;2、 密封不严,此种情形也有可能使限压阀失去降压功能;3、 膜片开裂,此种情形也有可能使限压阀失去限压功能。限压阀的毁坏后果是很严重的,有可能导致水压超过部分管道及设备的承压 能力,导致管道或管道上的其他设备碎裂,发生事故。因此,应该对限压阀的安全 稳定性必须采取技术手段予以保证。
技术实现思路
本专利技术所要解决的技术问题是,克服上述现有技术的缺陷,提供一种限压阀 的保护系统,可在限压阀出现故障后迅速切断水路,保护管网及设 ...
【技术保护点】
一种限压阀的保护系统,其特征在于:其是由限压阀和断水保护阀串接而成,所述限压阀和断水保护阀上分别开设有进、出水口,其中限压阀出水口与断水保护阀进水口连通,限压阀出水口压力小于断水保护阀允许压力;所述限压阀和断水保护阀内腔均设有与上述进、出水口连通之通水通道,以及可使空腔和通水腔隔离之限压组件;所述通水通道内均设有封水口,与限压组件配合之控制杆组件一端置于通水通道内,通过控制杆组件的移动而封堵封水口,形成对通水通道之逐级隔断,从而保护限压阀的安全。
【技术特征摘要】
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