本实用新型公开一种核燃料包壳管双轴蠕变高温夹具，包括两夹紧机构，每一夹紧机构均包括一安装壳体；每一安装壳体的一端还均开设一连接孔，包壳管的两端分别插设于一连接孔内；其中一所述安装壳体的内部沿其轴向还开设一与连接孔连通的通气流道，且该安装壳体的外壁还设有与通气流道连通的通气接口；每一连接孔内还均安装一套设于包壳管外壁的密封件；每一安装壳体设有连接孔的一端还固定连接一连接环，且每一连接环内还均安装一套设于包壳管外壁的压紧组件，压紧组件用于将密封件压紧限位于连接孔内。本实用新型采用了分体的设计，可有利于试验动态拉压过程中，不会导致密封件松脱、掉落，进而保证试验的稳定性。

The utility model discloses a double-shaft creep high temperature clamp for a nuclear fuel cladding tube, which comprises two clamping mechanisms, each of which comprises a mounting shell; One end of each mounting shell is also provided with a connecting hole, and both ends of the cladding tube are respectively inserted in a connecting hole; The inner part of the mounting shell is also provided with a ventilation channel communicated with the connecting hole along its axial direction, and the outer wall of the mounting shell is also provided with a ventilation interface communicated with the ventilation channel; A set of sealing parts arranged on the outer wall of the cladding tube is also installed in each connecting hole; One end of each mounting shell is arranged with a connecting hole and is fixedly connected with a connecting ring, and each connecting ring is also provided with a set of pressing components arranged on the outer wall of the cladding tube. The pressing components are used to compress the sealing parts in the connecting hole. The utility model adopts the design of separate body, which can be conducive to the dynamic tension and compression process of the test, and will not cause the sealing parts to loose and fall off, so as to ensure the stability of the test.