The invention relates to a rubber sealing ring for underground inspection well interface, in particular to a double-hardness corrugated rubber sealing ring, including a straight cylinder sealing part and a hard flange connected with one end of the straight cylinder sealing part. The straight cylinder sealing part adopts low hardness rubber material, and the hard flange adopts high hardness rubber material, which not only guarantees the soft sealing performance of the sealing part, but also solves the problem that the flange is too soft, the stiffness is poor, and the construction is easy to be deformed; at the same time, the additional cost caused by the steel ring reinforcement method is increased. Difficulties in creating difficulties and high quality risks. The inner side of the straight cylinder sealing part is provided with a shallow corrugated sealing ring so as to facilitate the direct demoulding when the sealing ring is manufactured by die pressing method; the structure of the mould is greatly simplified without setting a movable core, the production efficiency is improved, and the cost of the mould development and production is reduced; and the existence of a serrated sealing rib on the inner side of the sealing ring is solved. The problem of easy tearing improves the safety and reliability of products.
【技术实现步骤摘要】
一种双硬度波纹式橡胶密封圈
本专利技术涉及一种橡胶密封圈,具体涉及一种双硬度波纹式橡胶密封圈,用于地下检查井接口。
技术介绍
检查井是城市的重要基础设施。地下电缆、排水、排污、供水、供气和通讯等各种管道需要穿过设置在混凝土或塑料检查井壁上的圆形接口,与检查井内的设施或管路连接。为防止检查井外的水、泥土及其他污染物进入检查井内,需要在检查井壁的接口与插入的管道间设置橡胶密封圈。如图7-8所示,橡胶密封圈通常为环状结构,一端设有法兰。在施工时,将橡胶密封圈从检查井外侧推入圆形接口使橡胶密封圈一端的法兰与检查井的外壁贴合,再将塑料或金属管通过橡胶密封圈插入检查井内。现有的橡胶密封圈通过其外壁与检查井接口的内壁过盈配合,以及橡胶密封圈的内壁与插入管外壁之间的过盈配合实现密封效果。通常橡胶密封圈做成光滑直筒的简单结构,以便于橡胶密封圈的模压制作。橡胶密封圈的直筒部分和法兰部分采用相同种类、相同硬度的橡胶材料制作。由于检查井、管道以及橡胶密封圈制造的精度不高,尺寸存在波动,往往导致密封的效果不佳。通常采用加大橡胶密封圈的厚度,以保证过盈配合及密封效果,但这容易造成过盈配合太紧,管道插入困难的问题。橡胶密封圈通常采用硬度较低的橡胶生产,因此法兰的硬度也较低,刚度较差,一旦发生过盈配合过紧的情况,管道插入过程中容易出现橡胶密封圈一端的法兰严重变形,进而导致整个橡胶密封圈被管道挤入检查井内。这大大增加了施工安装的难度,并且施工后的密封效果也存在潜在风险。为了解决现有技术的弊端,通过修改橡胶密封圈直筒部分的结构,以优化密封效果,降低施工组装的难度,同时对法兰部分采用复合增强的 ...
【技术保护点】
1.一种双硬度波纹式橡胶密封圈,其特征在于:包括直筒状密封部和与直筒状密封部一端连接的硬质法兰(3);所述直筒状密封部内侧设有波纹密封环(2);所述波纹密封环(2)采用浅波纹形状;所述直筒状密封部采用低硬度橡胶材料,所述硬质法兰(3)采用高硬度橡胶材料。
【技术特征摘要】
1.一种双硬度波纹式橡胶密封圈,其特征在于:包括直筒状密封部和与直筒状密封部一端连接的硬质法兰(3);所述直筒状密封部内侧设有波纹密封环(2);所述波纹密封环(2)采用浅波纹形状;所述直筒状密封部采用低硬度橡胶材料,所述硬质法兰(3)采用高硬度橡胶材料。2.如权利要求1所述的双硬度波纹式橡胶密封圈,其特征在于:所述直筒状密封部的外侧设有锯齿状密封筋(1)。3.如权利要求2所述的双硬度波纹式橡胶密封圈,其特征在于:所述锯齿状密封筋(1)的数量和高度根据实际工况要求进行调整设计。4.如...
【专利技术属性】
技术研发人员:沙镇嵩,王学斌,杨治晓,
申请(专利权)人:北京洛科瀚科技有限公司,
类型:发明
国别省市:北京,11
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