阅读说明：本技术 密封活接头 (Sealing movable joint ) 是由 郝学威 赵屾 焦变英 乔楠 王利平 郎曼 邵莉莉 于 2020-06-16 设计创作，主要内容包括：本发明实施例公开了一种密封活接头,包括：第一接头和第二接头；所述第一接头与所述第二接头固定连接；所述第一接头一端设有第一平面,所述第二接头一端设有第二平面,所述第一平面和第二平面相抵；所述第一平面为水平面；所述第二平面为水平面；所述第一平面设有密封结构。在保证密封性能的同时,缩短了接头的安装拆除距离,提高了膜组安装维护效率,更好的提高沼气提纯系统的整体运行性能。(The embodiment of the invention discloses a sealing movable joint, which comprises: a first joint and a second joint; the first joint is fixedly connected with the second joint; a first plane is arranged at one end of the first joint, a second plane is arranged at one end of the second joint, and the first plane and the second plane are abutted; the first plane is a horizontal plane; the second plane is a horizontal plane; the first plane is provided with a sealing structure. The sealing performance is guaranteed, meanwhile, the mounting and dismounting distance of the joint is shortened, the mounting and maintenance efficiency of the membrane group is improved, and the overall operation performance of the methane purification system is better improved.)

1. A sealed union, comprising:

a first joint and a second joint;

the first joint is fixedly connected with the second joint;

a first plane is arranged at one end of the first joint, a second plane is arranged at one end of the second joint, and the first plane and the second plane are abutted; the first plane is a horizontal plane; the second plane is a horizontal plane;

the first plane is provided with a sealing structure.

2. The sealed union of claim 1, wherein the sealing structure comprises:

the clamping groove is formed in the first plane;

the sealing gasket is arranged on the clamping groove.

3. The sealed union of claim 2, wherein the gasket comprises: an outer ring and an inner ring;

the inner ring is fixedly connected with the outer ring.

4. The sealed union of claim 3 wherein the outer ring is a metal outer ring and the inner ring is a rubber inner ring.

5. The sealed union of claim 1 wherein an outer nut is disposed outside of the second fitting, the threaded end of the outer nut being connected to the first fitting;

and the second joint is provided with a protruding part close to the first joint end and used for positioning the other end of the outer sleeve nut.

6. A biogas purification system, comprising a sealed union of any one of claims 1 to 5;

the gas collection structure is connected with the membrane group through a pipeline;

one end of the sealing movable joint is connected with the pipeline, and the other end of the sealing movable joint is connected with the membrane group and used for sealing the membrane group.

7. The biogas purification system of claim 6, wherein a valve is provided at the connection of the gas collection structure and the pipeline for controlling the gas to enter the pipeline.