The utility model discloses a vacuum leak-proof bellows in the technical field of bellows, including bellows. The bellows include outer bellows and inner bellows. The outer bellows are located outside the inner bellows. The outer walls of the outer bellows are respectively equipped with vacuum valves and pressure sensors. The vacuum valves and pressure sensors are connected to the outer bellows and the inner bellows. Between layers of bellows, the outer wall of the bellows is provided with a leakage protection pipe, the outer end of the vacuum valve and the pressure sensor is arranged outside the leakage protection pipe, the two ends of the bellows are provided with joints, the outer wall of the joints is provided with external threads, the outer part of the joints is connected with connecting flanges through external threads, and the outer part of the joints is provided with sealing parts, and the inner part of the connecting flange is provided with external threads. A sealing ring is provided, and the sealing element matches the sealing ring. The structure is simple, the design is novel, the service life is long, the assembly and maintenance are very convenient, and the occurrence of safety accidents is greatly reduced.
【技术实现步骤摘要】
一种真空防泄漏波纹管
本技术涉及波纹管
,具体为一种真空防泄漏波纹管。
技术介绍
波纹管是指用可折叠皱纹片沿折叠伸缩方向连接成的管状弹性敏感元件。波纹管在仪器仪表中应用广泛,主要用途是作为压力测量仪表的测量元件,将压力转换成位移或力。波纹管管壁较薄,灵敏度较高,测量范围为数十帕至数十兆帕。它的开口端固定,密封端处于自由状态,并利用辅助的螺旋弹簧或簧片增加弹性。工作时在内部压力的作用下沿管子长度方向伸长,使活动端产生与压力成一定关系的位移。活动端带动指针即可直接指示压力的大小。波纹管常常与位移传感器组合起来构成输出为电量的压力传感器,有时也用作隔离元件。由于波纹管的伸展要求较大的容积变化,因此它的响应速度低于波登管。然而现有的燃气波纹管组件在使用过程中存在着一些不足之处,长时间使用组件会造成出现漏气现象,并且现有的波纹管组件气密性差,特别在螺纹口处,只是利用密封带进行一定的密封,这样的密封的效果不好,会出现连接不稳定现象,而且在输送需要防爆防泄漏的物质时,如燃油燃气,容易因为波纹管的疲劳性损伤等,引起波纹管的泄漏,从而产生安全事故。基于此,本技术设计了一种真空 ...
【技术保护点】
1.一种真空防泄漏波纹管,包括波纹管(1),其特征在于:所述波纹管(1)包括外层波纹管(11)和内层波纹管(12),所述外层波纹管(11)位于内层波纹管(12)的外部,所述外层波纹管(11)的外壁分别安装有真空阀(2)和压力感应器(3),所述真空阀(2)和压力感应器(3)连通于外层波纹管(11)和内层波纹管(12)之间,所述波纹管(1)的外壁设有泄漏保护管(4),所述真空阀(2)和压力感应器(3)的外端设在泄漏保护管(4)的外部,所述波纹管(1)的两端设有接头(5),所述接头(5)的外壁设有外螺纹(6),所述接头(5)的外部通过外螺纹(6)螺接有连接法兰(7),所述接头(5 ...
【技术特征摘要】
1.一种真空防泄漏波纹管,包括波纹管(1),其特征在于:所述波纹管(1)包括外层波纹管(11)和内层波纹管(12),所述外层波纹管(11)位于内层波纹管(12)的外部,所述外层波纹管(11)的外壁分别安装有真空阀(2)和压力感应器(3),所述真空阀(2)和压力感应器(3)连通于外层波纹管(11)和内层波纹管(12)之间,所述波纹管(1)的外壁设有泄漏保护管(4),所述真空阀(2)和压力感应器(3)的外端设在泄漏保护管(4)的外部,所述波纹管(1)的两端设有接头(5),所述接头(5)的外壁设有外螺纹(6),所述接头(5)的外部通过外螺纹(6)螺接有连接法兰(7),所述接头(5)的外部设有密封件(8),所述连接法兰(7)的内部设有密封圈(9),所述密封件(8)与密封圈(9)相适配。2.根据权利要...
【专利技术属性】
技术研发人员:庞震,
申请(专利权)人:湖北统塑管业有限公司,
类型:新型
国别省市:湖北,42
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