The utility model discloses a butterfly valve for airtight air defense projects, which comprises a valve body, a valve rod and a valve plate, the valve body is cylindrical, two port valve body are respectively provided with a flange, valve plate in the inner cavity of the valve body, the valve body is arranged on the inner wall of the valve seat is matched with the valve plate, valve seat for the circumference of the valve plate is provided with a sealing pad. The stem end of the support in the body of the circle, the other end of the stem from the body through the ear seat of the valve body, the valve plate and the free end is provided with a handle, the valve stem perpendicular to the body axis and the deviation from the valve diameter, the middle is vertically connected with the lever, the lever diameter direction along the cylinder extension and lever pin hinged on the top of the bearing, bearing welding in the valve plate, the free end of the lever is provided with a cylinder head, cylinder head end for valve plate is a plane, and a pressure spring is arranged between the cylinder head and the valve plate pressure. The fixing end of the spring is sheathed on the central rod of the pressure spring, and the root of the compression spring center rod is welded on the valve plate. The butterfly valve is easy to process, low in manufacturing cost and reliable in sealing.
【技术实现步骤摘要】
一种人防工程用气密蝶阀
本技术涉及一种人防工程用阀门,特别涉及一种人防工程用气密蝶阀,属于人防设备
技术介绍
现有技术中的蝶阀包括阀体、阀杆和阀板,阀体为圆筒状,阀体的两端口分别设有连接法兰,连接法兰上均布有螺栓孔,阀板位于阀体的内腔,阀体的内壁上设有与阀板相配合的阀座,阀座面向阀板的圆周上设有密封垫,或者阀板的外周设有密封垫,阀杆的一端支撑在阀体的圆周上,阀杆的另一端从阀体的阀体耳座中穿出,阀板的自由端设有把手。阀杆沿蝶阀的直径延伸且位于阀体的轴向中部,阀板中部固定在阀杆上呈中心对称。操纵把手转动阀杆时,阀板随阀杆转动,阀板的两半周从两个方向分别向阀座的密封面靠拢直至闭合。传统的蝶阀存在如下不足之处:1.需要通过阀杆对阀板施加比较大的预紧力,才能保持阀板的密封,预紧力稍小则阀板可以没有密封,预紧力太大则容易导致阀板变形或者阀杆与阀板之间的固定连接出现问题。2.由于依靠阀板的圆周实现与阀座的密封,密封面为弧面,加工难度大,精度要求高。3.由于阀杆沿蝶阀的直径延伸,阀板两半周密封力的方向不同,且以阀杆的轴线为中心呈中心对称,当蝶阀受到来自外侧的冲击波时,阀 ...
【技术保护点】
一种人防工程用气密蝶阀,包括阀体、阀杆和阀板,所述阀体为圆筒状,所述阀体的两端口分别设有连接法兰,所述连接法兰上均布有螺栓孔,所述阀板位于所述阀体的内腔,所述阀体的内壁上设有与阀板相配合的阀座,所述阀座面向所述阀板的圆周上设有密封垫,所述阀杆的一端支撑在所述阀体的圆周上,所述阀杆的另一端从所述阀体的阀体耳座中穿出,所述阀板的自由端设有把手,其特征在于:所述阀杆垂直于所述阀体的轴线且偏离阀体的直径,所述阀杆的中部垂直连接有杠杆,所述杠杆沿所述筒体的直径方向延伸且杠杆通过销轴铰接在支座顶部,所述支座的根部焊接在所述阀板上,所述杠杆的自由端设有圆柱头,所述圆柱头面向所述阀板的端面 ...
【技术特征摘要】
1.一种人防工程用气密蝶阀,包括阀体、阀杆和阀板,所述阀体为圆筒状,所述阀体的两端口分别设有连接法兰,所述连接法兰上均布有螺栓孔,所述阀板位于所述阀体的内腔,所述阀体的内壁上设有与阀板相配合的阀座,所述阀座面向所述阀板的圆周上设有密封垫,所述阀杆的一端支撑在所述阀体的圆周上,所述阀杆的另一端从所述阀体的阀体耳座中穿出,所述阀板的自由端设有把手,其特征在于:所述阀杆垂直于所述阀体的轴线且偏离阀体的直径,所述阀杆的中部垂直连接有杠杆,所述杠杆沿所述筒体的直径方向延伸且杠杆通过销轴铰接在支座顶部,所述支座的根部焊接在所述阀板上,所述杠杆的自由端设有圆柱头,所述圆柱头面向所述阀板的端面为平面,且所述圆柱头与所述阀板之间设有压簧,所述压簧的固定端套装在压簧中心杆上,所述压簧中心杆的根部焊接在所述阀板上。2.根据权利要求1所述的人防工程用气密蝶阀,其特征在于:所述圆柱头面向所述阀板的端面上设有沉孔,所述压簧的自由端嵌于所述沉孔中。3.根据权利要求1所述的人防工程用气密蝶阀,其特征在于:所述支座面向所述阀杆的...
【专利技术属性】
技术研发人员:戴兴泉,黄加章,徐超,
申请(专利权)人:扬州碧源人防工程有限公司,
类型:新型
国别省市:江苏,32
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