The utility model provides an anti-freeze-drying water meter, which belongs to the field of mechanical technology. The anti-freeze-drying water meter consists of a case, in which a gear box is arranged. The gear box includes a cover plate of the gear box, a cover of the gear box and a cover of the gear box. The cover plate of the gear box and the cover of the gear box are fastened and connected. The cover of the gear box is located in the outer cover of the gear box and a number of concave holes are evenly arranged on the cover of the gear box. A spring is arranged in the concave hole and one end of the spring is located at the bottom of the concave hole. One end rests on the cover plate of the gear box, and a number of annular grooves are arranged on the outer wall of the inner sleeve of the gear box. A sealing ring is arranged in the annular groove, and the sealing ring is located between the outer wall of the inner sleeve of the gear box and the inner wall of the outer sleeve of the gear box. The utility model has the advantages of simple structure, practicality and convenience.
【技术实现步骤摘要】
防冻干式水表
本技术属于机械
,具体涉及一种防冻干式水表。
技术介绍
现有的干式水表主要由表壳及安装在表壳内的计量部件、叶轮部件、主从传动磁钢构成,计量部件的底部设置一隔板,将表壳内分隔为水流腔室和安装计量部件的腔室,叶轮部件安装在水流腔室内,所有部件安装完成后,表壳内的空间基本固定不变,即其容积不变,这一不变的容积对于水表计量和安装比较方便,但是当外界温度低于零摄氏度时,表壳内的积水容易结冰,膨胀,会对表壳及计量部件产生向外的挤压力,时常发生表壳被挤压破,造成水表损坏。
技术实现思路
本技术的目的是针对现有的技术存在上述问题,提出了一种结构简单、实用方便的防冻干式水表。本技术的目的可通过下列技术方案来实现:一种防冻干式水表,包括表壳,在表壳内设置有齿轮盒,其特征在于,齿轮盒包括齿轮盒盖板、齿轮盒外套和齿轮盒中套,齿轮盒盖板和齿轮盒外套扣合连接,齿轮盒中套位于齿轮盒外套内且在齿轮盒中套上均匀开设有若干凹孔,在凹孔内设置有弹簧且弹簧一端抵靠在凹孔底部,另一端抵靠至齿轮盒盖板上,在齿轮盒中套外壁开设有若干环形凹槽,环形凹槽内设有密封圈且密封圈位于齿轮盒中套外壁和齿轮盒外套内壁之间。与现有技术相比,本技术通过将原来整体结构的齿轮盒分别由齿轮盒盖板,齿轮盒外套,齿轮盒中套组成,当水表内部收外界的气温影响结冰时,整个水表的内部就会产生膨胀,因为水的密度大,冰的密度小,结冰后分子间空隙变大,而总质量不变,所以体积会变大,此时水表内部受到一定的压力或者膨胀所产生的推力,将齿轮盒中套向上推,从而使得齿轮盒盖板和齿轮盒中套之间的弹簧被压缩,这样水表内部的体积就会变大,让水 ...
【技术保护点】
1.一种防冻干式水表,包括表壳,在表壳内设置有齿轮盒,其特征在于,齿轮盒包括齿轮盒盖板、齿轮盒外套和齿轮盒中套,齿轮盒盖板和齿轮盒外套扣合连接,齿轮盒中套位于齿轮盒外套内且在齿轮盒中套上均匀开设有若干凹孔,在凹孔内设置有弹簧且弹簧一端抵靠在凹孔底部,另一端抵靠至齿轮盒盖板上,在齿轮盒中套外壁开设有若干环形凹槽,环形凹槽内设有密封圈且密封圈位于齿轮盒中套外壁和齿轮盒外套内壁之间。
【技术特征摘要】
1.一种防冻干式水表,包括表壳,在表壳内设置有齿轮盒,其特征在于,齿轮盒包括齿轮盒盖板、齿轮盒外套和齿轮盒中套,齿轮盒盖板和齿轮盒外套扣合连接,齿轮盒中套位于齿轮盒外套内且在齿轮盒中套上均匀...
【专利技术属性】
技术研发人员:董海辉,刘清波,
申请(专利权)人:宁波胜德水表有限公司,
类型:新型
国别省市:浙江,33
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。