CN202674413U - 带有防虹吸装置的进水电磁阀 - Google Patents

带有防虹吸装置的进水电磁阀 Download PDF

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CN202674413U
CN202674413U CN 201220238954 CN201220238954U CN202674413U CN 202674413 U CN202674413 U CN 202674413U CN 201220238954 CN201220238954 CN 201220238954 CN 201220238954 U CN201220238954 U CN 201220238954U CN 202674413 U CN202674413 U CN 202674413U
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guide rod
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陆宝宏
徐新华
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Zhejiang Hongchang Electrical Appliance Technology Co Ltd
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JINHUA HONGCHANG ELECTRICAL EQUIPMENT CO Ltd
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Abstract

本实用新型属于电磁阀类，具体是一种带有防虹吸装置的进水电磁阀，包括阀体，其特征在于：在阀体的进水口位置增加一防虹吸装置，防虹吸装置由防虹吸座、导杆、橡胶片、弹簧、反向封水座、O型圈、压片构成，其中防虹吸座由内圆柱环与外圆柱环用筋连接为一体，在防虹吸座内圆柱环构成的中孔内有可自由滑动的导杆，导杆上套有压缩弹簧，导杆一端固定有橡胶片，橡胶片紧贴反向封水座，反向封水座由压片固定在阀体上，防虹吸座的筋作为压缩弹簧工作的支撑面。本实用新型结构简单合理，原有的进水电磁阀阀体只需稍作改进，加装该装置就可实现防虹吸功能，提高了进水阀的整体性能。

Description

带有防虹吸装置的进水电磁阀
技术领域
本实用新型属于电磁阀类，具体涉及一种带有防虹吸装置的进水电磁阀，尤其涉及用于洗衣机、热水器、洗碗机等用水设备控制水流通断的防虹吸进水电磁阀。 
背景技术
现有的洗衣机、热水器等用水设备用于控制水流的进水电磁阀，其工作原理是借助管路内水压，使其作用于橡胶膜片上实现关闭密封的，通常不具备防虹吸的功能。当管路内其它部位用水或水压不稳定时，会引起电磁阀的进水口产生负压，从而使电磁阀的密封膜片抬起，致使电磁阀的进、出水口导通，使残留在进水阀出水管道内含有洗涤剂（对于洗衣机而言）等的不洁水倒流进入自来水系统管路，污染系统管路内的洁净水。在北美发达国家，如美国、加拿大，对洗衣机上的进水电磁阀有相应的强制性标准，要求达到防虹吸功能。 
发明内容
本实用新型的目的是针对现有技术的不足，提供一种结构合理、简单可靠、成本低的带有防虹吸装置的进水电磁阀。 
本实用新型采用如下技术方案： 
一种带有防虹吸装置的进水电磁阀，包括阀体，其特点在于：在阀体的进水口位置增加一防虹吸装置，防虹吸装置由防虹吸座、导杆、橡胶片、 压缩弹簧、反向封水座、O型圈、压片构成，其中防虹吸座由内圆柱环与外圆柱环用筋连接为一体，在防虹吸座内圆柱环构成的中孔内有可自由滑动的导杆，导杆上套有压缩弹簧，导杆一端固定有橡胶片，橡胶片紧贴反向封水座，反向封水座由压片固定在阀体上，防虹吸座的筋作为压缩弹簧工作的支撑面。 
本实用新型反向封水座与阀体间有O型密封圈，其在阀体进水口内的装配位置设计成使压缩弹簧形成一定的预压缩。在阀体进水口位置设计有环状凸台，压片上设有相应的凹槽，环状凸台与压片凹槽相扣，以保证反向封水座在进水口内的位置固定。 
本实用新型当进水阀正常工作时，水流产生的压力将因压缩弹簧弹力紧贴在反向封水座上的导杆推开，水流经由阀内腔向出水口流出；当进水阀关闭时，由于压缩弹簧的弹力，使导杆上的橡胶片紧贴在反向封水座的环形封水面上，隔断进水口与阀内腔的通道。当进水口产生负压时，负压作用在导杆上的力，与压缩弹簧弹力的方向是一致的，促使其更加密封。整个防虹吸装置形成一个限制水流回流的单向机构，达到了防虹吸的目的。 
本实用新型结构简单合理，原有的进水电磁阀阀体只需稍作改进，加装该装置就可实现防虹吸功能，提高了进水阀的整体性能。防虹吸装置增加的成本不多，使进水阀符合了相关国际标准的要求，有利于提高电磁阀在市场上的竞争力。 
附图说明
图1为是本实用新型剖视图。 
图2为防虹吸座结构示意图。 
图中1是阀体，2是压片，3是O型圈，4是反向封水座，5是橡胶片，6是导杆，7是压缩弹簧，8是防虹吸座，81为防虹吸座内圆柱环，82为防虹吸座外圆柱环，83为筋，84为中孔。图中箭头表示的是进水电磁阀正常工作时通过电磁阀的水流流向。 
具体实施方式
下面结合附图对本实用新型的具体实施作进一步的描述 
如图1所示，本实用新型主要包括阀体1、压片2、O型圈3、反向封水座4、橡胶片5、导杆6、压缩弹簧7、防虹吸座8，如图2所示，防虹吸座8由内圆柱环81与外圆柱环82用筋83连接为一体，在防虹吸座8内圆柱环81构成的中孔84内有可自由滑动的导杆6，导杆6上套有压缩弹簧7，导杆6一端固定有橡胶片5，橡胶片5紧贴反向封水座4，反向封水座4由压片2固定在阀体1上，防虹吸座的筋83作为压缩弹簧7工作时的支撑面。 
本实用新型阀体1由工程塑料注塑成型，进、出水口与介质管道相连，其连接形式可以是螺纹或其它形式。阀体1进水口内设有两层台阶和一圈凸台，最深处台阶用于控制防虹吸座8的安装位置，防虹吸座8的结构设计成由内外两圈同心圆环柱通过几条筋连为一体，也可以按此结构直接设计在阀体上，其内孔安装导杆6，控制导杆6与防虹吸座8内孔的配合间隙，使导杆6可以在孔内顺畅滑动。压缩弹簧7由防虹吸座8的内圆柱环做导向，由防虹吸座8的四条筋做支撑面，压缩弹簧7的另一端作用于导杆6上，导杆6头部装有橡胶片5，导杆6与橡胶片5紧密配合。阀体1 进水口内较浅的台阶用于控制反向封水座4的固定位置，该位置设计成在各零件装配后，确保压缩弹簧7有一定的压缩量，产生合适的弹力，从而保证导杆6头部装配的橡胶片5紧贴在反向封水座4的环形封水面上。压缩弹簧7产生的预弹力设计成能保证在水压接近零时反向不泄漏，且尽可能小，以最大限度降低防虹吸装置对进水阀正常进水时的影响。反向封水座4与阀体1之间装配有O型圈3，以保证密封。阀体1上的环状凸台可由注塑强制脱模形式，压片2通过一定的力压入后，其上相应的凹槽与阀体1上的凸台相扣，从而保证整个防虹吸装置在电磁阀进水口内的固定，并确保当在进水口产生最大负压（0.1MPa）时防虹吸装置不被拉出。 
本实用新型的工作过程是这样的：当进水阀正常工作时，水流产生的压力将因压缩弹簧7的弹力紧贴在反向封水座4上的导杆6推开，水流经由阀内腔向出水口流出；当进水阀关闭时，由于压缩弹簧7的弹力，使导杆6上的橡胶片5紧贴在反向封水座4的环形封水面上，隔断进水口与阀内腔的通道。当进水口产生负压时，负压作用在导杆6（包含橡胶片5）上的力，与压缩弹簧7的弹力方向是一致，促使其更加密封。整个防虹吸装置形成一个限制水流回流的单向机构，实现了防虹吸的目的。 
本实用新型特别适用于洗衣机、热水器、洗碗机等用水设备控制水流通断。 

Claims (3)

1.一种带有防虹吸装置的进水电磁阀，包括阀体，其特征在于：在阀体的进水口位置增加一防虹吸装置，防虹吸装置由防虹吸座、导杆、橡胶片、弹簧、反向封水座、O型圈、压片构成，其中防虹吸座由内圆柱环与外圆柱环用筋连接为一体，在防虹吸座内圆柱环构成的中孔内有可自由滑动的导杆，导杆上套有压缩弹簧，导杆一端固定有橡胶片，橡胶片紧贴反向封水座，反向封水座由压片固定在阀体上，防虹吸座的筋作为压缩弹簧工作的支撑面。
2.根据权利要求1所述的带有防虹吸装置的进水电磁阀，其特征在于：反向封水座与阀体间有O型密封圈。
3.根据权利要求1或2所述的带有防虹吸装置的进水电磁阀，其特征在于：在阀体进水口位置设计有环状凸台，压片上设有相应的凹槽，环状凸台与压片凹槽相扣。
CN 201220238954 2012-05-25 2012-05-25 带有防虹吸装置的进水电磁阀 Expired - Lifetime CN202674413U (zh)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103352997A (zh) * 2013-07-03 2013-10-16 杭州神林电子有限公司 带负压破坏性逆止器的电磁阀
CN103356072A (zh) * 2013-08-08 2013-10-23 泰州乐金电子冷机有限公司 水嘴和包含其的饮水机
CN110748695A (zh) * 2019-11-05 2020-02-04 厦门颖锋科技有限公司 一种多功能先导式给水阀

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103352997A (zh) * 2013-07-03 2013-10-16 杭州神林电子有限公司 带负压破坏性逆止器的电磁阀
CN103356072A (zh) * 2013-08-08 2013-10-23 泰州乐金电子冷机有限公司 水嘴和包含其的饮水机
CN110748695A (zh) * 2019-11-05 2020-02-04 厦门颖锋科技有限公司 一种多功能先导式给水阀

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