The utility model relates to a high-temperature wear-resistant hard-sealed ball valve with dust-proof structure, which comprises a valve body, a valve stem and a ball. The valve seat is made of an integral whole. A left pressure ring, a right pressure ring, a butterfly spring and a compression ring are successively installed between the valve seat and the valve body. The left and right pressure rings are combined structures, and the side of the left pressure ring is provided with a ring. A ring-shaped groove is arranged on the side of the right pressure ring corresponding to the ring-shaped groove. A graphite ring is sealed between the left and right pressure rings, and a graphite ring is installed between the pressure ring and the valve seat; a rectangular sealing ring is arranged in the middle of the valve stem, and the first sealing ring, the second sealing ring and the second sealing ring are symmetrically arranged on both sides of the rectangular sealing ring in turn. The supporting ring and the inclined plane of the inner side of the two supporting rings are internally tightened, and the inner side of the two supporting rings are respectively provided with the second sealing ring matched with the inclined plane. The utility model has the advantages of simple structure, scientific and reasonable design, ingenious conception, improved sealing performance of the product, and has the value of wide popularization and application.
【技术实现步骤摘要】
一种具有防尘结构的高温耐磨硬密封球阀
本技术属于阀门领域,涉及球阀,尤其是一种具有防尘结构的高温耐磨硬密封球阀。
技术介绍
球阀是在灰渣管路中比较理想的启闭装置,其密封的好坏直接影响阀门的质量和使用寿命。过去采用O形橡胶密封结构形式,即在阀座上加工出的环形槽内放入O形密封圈,然后将其装配进套类零件上加工出的孔内,形成阀座与阀体的密封。这种结构的密封性能取决于设计时的过盈量,即O形密封圈的压缩量和孔、轴零件的加工精度。过盈量太小,密封性能差,过盈量太大,装配时容易挤坏O形密封圈,使密封失效。上述密封结构简单,装配容易。但若阀座、阀体的加工精度不高或难以提高加工精度时,除基本的密封性能难以保证或难以进一步提高精度时,原因在于球阀的开关属于部分回转型的,经常需90°开关。如果密封不严,就会出现泄露,管道内的颗粒介质对阀门零件冲蚀,降低阀门的寿命。另外,由于阀杆与阀体之间为动配合,有一定间隙,阀门在开关时介质作用在球体上的巨大推力,必然使阀杆产生一定倾斜,阀杆的力偏向的一边,那一边就磨损严重,而且灰渣水中含有大量悬浮物冲蚀着密封圈。引起阀杆部位O形密封圈寿命周期短,泄露现象经常发生,对现场环境也造成一定影响。
技术实现思路
本技术的目的在于克服现有技术的不足,提供一种具有防尘结构的高温耐磨硬密封球阀。本技术的方案是这样实现的:一种具有防尘结构的高温耐磨硬密封球阀,包括阀体、阀杆和球体,所述阀体内密封旋转安装球体,该球体与安装在阀体内的阀座密封接触,该球体同轴固装阀杆,所述阀座为一体制成,该阀座与阀体之间依次安装左压环、右压环、蝶形弹簧以及压紧环,所述左、右压环为组合结构, ...
【技术保护点】
1.一种具有防尘结构的高温耐磨硬密封球阀,包括阀体、阀杆和球体,所述阀体内密封旋转安装球体,该球体与安装在阀体内的阀座密封接触,该球体同轴固装阀杆,其特征在于:所述阀座为一体制成,该阀座与阀体之间依次安装左压环、右压环、蝶形弹簧以及压紧环,所述左、右压环为组合结构,左压环的侧面制有环形凹槽,对应环形凹槽的右压环的侧面一体制有环形凸起,该左右、右压环之间密封安装石墨圈,所述压紧环与阀座之间安装石墨环;所述阀杆中部设置矩形密封环,该矩形密封环两侧依次对称设置第一密封环、第二密封环和支撑环,两个支撑环的里侧向内收紧的斜面,该两个支撑环里侧分别设置与之斜面配合的第二密封环。
【技术特征摘要】
1.一种具有防尘结构的高温耐磨硬密封球阀,包括阀体、阀杆和球体,所述阀体内密封旋转安装球体,该球体与安装在阀体内的阀座密封接触,该球体同轴固装阀杆,其特征在于:所述阀座为一体制成,该阀座与阀体之间依次安装左压环、右压环、蝶形弹簧以及压紧环,所述左、右压环为组合结构,左压环的侧面制有环形凹槽,对应环形凹槽的右压环的侧面一体制有环形凸起,该左右、右压环之间密封安装石墨圈,所述压紧环与阀座之间安装石墨环;所述阀杆中部设置矩形密封环,该矩形密封环两侧依次对称设置第一密封环、第二密封环和支撑环,两个...
【专利技术属性】
技术研发人员:李开发,
申请(专利权)人:天津达沃斯阀门有限公司,
类型:新型
国别省市:天津,12
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