原文：
目前，蝶阀作为一种用来实现管路系统通断及流量控制的部件，已在石油、化工、冶金、水电等许多领域中得到极为广泛地应用。在已公知的蝶阀技术中，其密封形式多采用密封结构，密封材料为橡胶、聚四氟乙烯等。由于结构特征的限制，不适应耐高温、高压及耐腐蚀、抗磨损等行业。 现有一种比较先进的蝶阀是三偏心金属硬密封蝶阀，阀体和阀座为连体构件，阀座密封表面层堆焊耐温、耐蚀合金材料。多层软叠式密封圈固定在阀板上，这种蝶阀与传统蝶阀相比具有耐高温，操作轻便，启闭无磨擦，关闭时随着传动机构的力矩增大来补偿密封，提高了蝶阀的密封性能及延长使用寿命的优点。 但是，这种蝶阀在使用过程中仍然存在以下问题： 一、由于多层软硬叠式密封圈固定在阀板上，当阀板常开状态时介质对其密封面形成正面冲刷，金属片夹层中的软密封带受冲刷后，直接影响密封性能。 二、受结构条件的限制该结构不适应做通径DN200以下阀门，原因是阀板整体结构太厚，流阻大。 三、因三偏心结构的原理，阀板的密封面与阀座之间的密封是靠传动装置的力矩使阀板压向阀座。正流状态时，介质压力越高密封挤压越紧。当流道介质逆流时随着介质压力的增大阀板与阀座之间的单位正压力小于介质压强时，密封开始泄漏。 高性能三偏心双向硬密封蝶阀，其特征在于：所述阀座密封圈由软性T形密封环两侧多层不锈钢片组成。阀板与阀座的密封面为斜圆锥结构，在阀板斜圆锥表面堆焊耐温、耐蚀合金材料；固定在调节环压板之间的弹簧与压板上调节螺栓装配一起的结构。 这种结构有效地补偿了轴套与阀体之间的公差带及阀杆在介质压力下的弹性变形，解决了阀门在双向互换的介质输送过程中存在的密封问题。采用软性T型两侧多层不锈钢片组成密封圈，具有金属硬密封和软密封的双重优点，无论在低温和高温情况下，均具有零渗漏的密封性能。 试验证明池正流状态(介质流动方向与蝶板转动方向相同)时，密封面的压力是传动装置的力矩和介质压力对阀板的作用产生的。正向介质压力增大时阀板斜圆锥表面与阀座密封面挤压越紧，密封效果越好。当逆流状态时，阀板与阀座之间的密封靠驱动装置的力矩使阀板压向阀座。随着反向介质压力的增大，阀板与阀座之间的单位正压力小于介质压强时，调节环的弹簧在受载后所储存的变形能补偿阀板与阀座密封面的紧压力起到自动补偿作用。因此本实用新型不像现有的技术那样，在阀板上安装软硬多层密封圈，而是直接安装在阀体上，在压板和阀座中间增设调节环是十分理想的双向硬密封方式。它将可取代闸阀、截止阀及球形阀。

“ Butterfly valve in the course of a few structural problems that exist in”是由提供的阀门新闻，译文仅供参考。另外，中国蝶阀网还提供相关产品搜索： 、 、 、 、 、 、 、 、 、 、 、 等。

译文：
At present, the butterfly as a piping system used to implement off and flow control components, has been in the petroleum, chemical industry, metallurgy, water, electricity and many areas are very widely used. The butterfly valve has been publicly known in the technology, the seal forms enclosed structure, sealing material for the rubber, PTFE and so on. As the structure of the restrictions, not suited to high temperature, high pressure and corrosion resistance, wear and other industries. Present a more advanced three eccentric butterfly valve is metal seal butterfly valve, valve and seat components for the piece, the valve seat sealing surface layer welding temperature, corrosion resistant alloy material. Stacked multi-layer soft ring fixed in the valve plate, this butterfly has a high temperature compared with the traditional butterfly valve, easy to operate, open and close without friction, closed with the drive mechanism to compensate for increased seal torque and improve a valve sealing performance and durability advantages. However, this butterfly is still in the course of the following problems: 1, due to soft and hard multi-stacked ring fixed in the valve plate, when the valve plate normally open state, forming a positive medium to its sealing surface erosion, and metal sheets laminated in the soft seal by brushing with a direct impact on seal performance. Second, by the structural constraints of the structure do not meet the following path DN200 valve, because the overall structure of thick disc, large flow resistance. Third, because of the principle structure of the three eccentric valve plate sealing surface and the seal between the valve seat is on the transmission of torque to seat the valve plate pressure. Positive flow state, the higher the pressure medium sealed tight squeeze. When the countercurrent flow medium with medium pressure when the valve plate and valve seat, the pressure between the units is less than the pressure medium, the seal began to leak. High-performance 3-way eccentric hard sealing butterfly valve, characterized in that: above T-shaped valve seat ring sealing ring from the soft side multilayer composed of stainless steel sheet. Valve plate and valve seat sealing surface for the oblique cone structure, oblique cone surface in the valve plate welding temperature, corrosion resistant alloy materials; fixed in the regulation of the spring between the ring plate and the plate with the adjusting screw assembly structure. This structure effectively compensate for tolerance between the sleeve and the valve stem in the medium band and elastic deformation under pressure to solve the two-way valve in the process of exchange of the medium transport sealing problems exist. T-side with soft multi-layer film composed of stainless steel ring with a metal seal and soft seal the dual advantages of both low and high temperature cases, all with zero leakage sealing performance. Pool tested positive flow state (flow direction of medium and disc rotating in the same direction), the sealing surface pressure is the transmission of torque and media pressure on the valve plate of efficacy. Positive medium pressure valve plate when the oblique cone surface and the valve seat sealing surface of the tight squeeze, the better the sealing effect. When the counter-current state, the valve plate and seal between the valve seat by drive torque to the valve plate voltage to the valve seat. With the reverse media pressure, valve plate and seat unit between the positive pressure is less than medium pressure, the adjustment ring spring loaded strain energy stored after the compensation valve plate and valve seat sealing surface of the tight pressure to play the role of automatic compensation. Therefore, unlike the utility model as the existing technology, the valve plate to install software and hardware multi-ring, but directly on the body, in the middle of plate and an additional adjustment ring seat is very good way of two-way seal . It can replace the valve, globe valve and globe valve.