译文:
内容提示:三偏心金属硬密封蝶阀具有耐高温,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。但其依然存在结构问题。
目前,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,其密形式多采用密封结构,密封材料为橡胶、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。
三偏心金属密封蝶阀的结构特征
三偏心金属密封蝶阀的蝶板回转中心(即阀门轴中心)与蝶板密封面形成一个尺寸A偏置,并与阀体中心线形成一个B偏置;阀体密封面中心线与阀座中心线(即阀体中心线)形成一个角度为β的角位置。
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。
“ Three eccentricity metal hard sealing butterfly valve used in the structural problems ”是由提供的国际阀门新闻,译文仅供参考。另外,中国蝶阀网还提供相关产品搜索:、、 、、等。
原文:
Content Tip: three eccentricity metal hard sealing butterfly valve with a high temperature, easy operation, open and close without friction, closed with the transmission of the torque increases to compensate for seal, improved butterfly valve sealing performance and durability advantages. But its still structural problems.
Now, as a method used to achieve piping system off and flow control components, has been in the petroleum, chemical industry, metallurgy, water, electricity and many other areas to be very widely used. Already public knowledge of the butterfly valve technology, its dense form of multi-sealed structure, sealing material for rubber, and so on. As the structural characteristics of the restriction is not suitable for high temperature, high pressure and corrosion resistance, abrasion resistance and other industries.
Present a more sophisticated butterfly valve is a three eccentricity metal hard sealing butterfly valve, valve and valve seat as the Siamese components, valve seat sealing surface layer welding temperature, corrosion resistant alloy material. Multi-layer soft-stacked ring fixed to the valve plate, this butterfly with the traditional butterfly compared to high temperature, easy operation, open and close without friction, is closed with the transmission of the torque increases to compensate for seal, to improve a butterfly valve sealing performance and durability advantages.
Three eccentricity metal sealing butterfly valve of the structural characteristics of
Three eccentricity metal sealing butterfly valve butterfly plate rotation center (that is, the valve shaft center) and the butterfly plate sealing surface to form a size A bias, and with the valve body centerline to form a B bias; valve sealing surface of the center line of valve Block centerline (ie, body centerline) to form an angle β of the angular position.
However, this butterfly valve in the use of the process is still the following problems:
1, due to soft and hard stacked multi-ring fixed to the valve plate, when the valve plate to its normal open state media, the formation of a positive sealing surface erosion, and metal sheets laminated in the soft-sealing tape subject to erosion, the direct impact on seal performance.
Second, by the structural conditions that limit the structure do not meet the following diameter DN200 valves, because the overall structure of valve plate thick, large flow resistance.
Third, because of three eccentric structure, the principle of the valve plate sealing surface and the valve seat between the seal relies on transmission of the torque to valve plate pressure to the valve seat. Positive flow state, the media, the higher the pressure sealed squeeze more tightly. When the flow channel medium countercurrent time with the media pressure increases valve plate and seat units between positive pressure less than the medium pressure, the seal started to leak out.
High-performance three eccentric two-way hard-seal butterfly valve, its characteristics are: above the valve seat ring by a soft T-shaped sealing ring on both sides of multi-layer stainless steel slices. Valve plate and valve seat sealing surface for the oblique cone structure, in the valve plate oblique cone surfacing temperature, corrosion resistant alloy materials; fixed in the regulation of ring platen between the spring and platen on the adjustment bolt assembly with the structure.
This structure effectively compensate for the sleeve and the valve between the tolerance zone and the stem in the medium under the pressure of the elastic deformation, solve the valve in the two-way exchange of media delivery exist in the process of sealing problems. Use of soft T-seals on both sides of the composition of multi-layer stainless steel sheet with a metal seal and soft seal the dual advantages of both the low and high temperature cases, both with zero leakage sealing performance.
Experimental proof of pool positive flow state (medium flow direction and the butterfly plate rotation in the same direction), the sealing surface pressure is the transmission of torque and media pressure on the valve plate of the role of the elected. Positive media pressure when the valve plate oblique cone surface and the valve seat sealing surface squeezed more tightly, sealing the better. When the counter-current state, the valve plate and valve seat between the seal by drive torque to valve plate pressure to the valve seat. With the reverse-medium pressure, the valve plate and valve seat units between positive pressure less than the medium pressure, the adjustment ring springs under loading of the stored deformation energy compensation valve plate and valve seat sealing surface of the tight Pressure to play automatically compensate. Therefore, this utility model, unlike existing technologies, as the valve on-board installation of software and hardware multi-ring, but directly installed on the body, in the platen and the valve seat intermediate additional adjustment ring is a very good two-way hard-sealing method . It can replace valve, the cut-off valve and ball valve.
原文来源:
3333333333333333333333333333333333333333 科研成果:新型变形铝合金阀杆螺母
译文:
阀杆螺母是阀门驱动装置的重要零件之一。阀门工作时,手轮或电动装置带动安装在支架箱内的阀杆螺母旋转,阀杆螺母将手轮或电动装置的运动和启闭力矩传递到阀杆,阀杆升降阀门密封元件(闸板、阀瓣、柱塞、膜片等),实现阀门的启闭和密封。
铝合金阀杆螺母具有优良的机械性能和铸造性能,成品率高,比重小,仅为铜比重的1/3左右,价格也为铜的1/3左右,具有较高的比强度(强度/比重)和xxx。我校研制的新型的变形铝合金,是通过冲压、弯曲、轧、挤压等工艺使其组织、形状发生变化后晶粒得到了细化的铝合金,其强度、硬度以及抗压性、抗拉性都有很大的提高,尤其在表面工艺处理上,使用了镀层、拉丝等工艺,加强了表面的硬度,耐划耐刮。变形铝合金阀杆螺母的材料应具有一定的强度、韧性和硬度,较低的摩擦系数,良好的耐蚀性和一定的耐热性。适用于手轮和电动闸阀、截止阀、隔膜阀和柱塞阀等的阀杆螺母,还可广泛应用于轴套、轴瓦、蜗轮齿冠及其它耐磨件的制造上,作为日渐匮乏的铜合金材料的的替代产品,具有很高的经济效益和社会效益。
新型的变形铝合金的材料力学性能,使其制造的阀杆螺母在常温时的材料抗拉强度σb达到550Mpa,延伸率δ为12%,表面硬度值应为HB≥150,满足阀杆螺母的使用要求。新型的变形铝合金与阀杆主要材料的马氏体不锈钢、奥氏体不锈钢等摩擦性能,干摩擦系数小于0.35。
“ Research results: the new deformed aluminum alloy stem nut ”是由提供的国际阀门新闻,译文仅供参考。另外,中国蝶阀网还提供相关产品搜索:、、 、、等。
原文:
The valve stem nut is one of the drives of the important parts. Valve job, hand-driven wheel or electrical device installed in the bracket inside the stem nut rotation, stem nut hand wheel or electrical device to the movement and hoisting torque delivered to the stem, lifting the valve stem sealing element ( gate, flap valve, plunger, diaphragm, etc.), to achieve the valve open and close and seal.
Aluminum alloy stem nut with excellent mechanical properties and casting performance, yield a high proportion of small, the proportion of copper is only 1 / 3 the price for copper in 1 / 3 with high specific strength (strength / weight), and cost-effective. Our school developed a new type of deformation of aluminum alloy is produced by stamping, bending, rolling, extrusion and other processes to bring the organization, the shape change after the grain has been refined aluminum alloy, its strength, hardness and resistance to stress, anti - La nature has greatly improved, especially in the surface treatment process, using a coating, drawing and other techniques to enhance the surface hardness, scratch resistance to draw. Deformation of aluminum alloy stem nut material should have a certain degree of strength, toughness and hardness, low friction coefficient, good corrosion resistance and a certain degree of heat resistance. Apply to hand-wheel and electric valve, globe valve, diaphragm and plunger valve stem nut, etc., but also widely used in bushings, bearings, worm gear crown and other wear-resistant parts manufacturing as an increasingly scarce copper alloy materials, alternative products, with high economic and social benefits.
The new deformation mechanical properties of aluminum alloy material to manufacture the stem nut when the materials at room temperature tensile strength of σb to 550Mpa, elongation δ of 12%, the surface hardness value should be HB ≥ 150, to meet the stem nut use requirements. The new deformed aluminum alloy and martensitic stainless steel stem the main materials, austenitic stainless steel friction performance, dry friction coefficient is less than 0.35.
原文来源: