Experimental special chock plug of small -bore pipe fitting tensile

The utility model discloses an experimental special chock plug of small -bore pipe fitting tensile, including core bar, locking cap, arc facing and nut, the core bar includes toper section and screw thread section, and nut and the cooperation of screw thread section, the tip of toper section are connected in the screw thread section, the locking cap suit is in the screw thread section outside, the arc facing includes four, and four blocks of arc facings locate the toper section outside, and around the axis equipartition of toper section, four arc facing tail ends all with the locking cap joint, reduce experiment operation personnel's working strength in the accuracy that has improved the experimental result, avoided unnecessary extravagant, also be favorable to the laboratory clean and tidy. 本实用新型公开了种小口径管材拉伸试验专用塞头，包括芯杆、固定帽、弧形衬片和螺母，所述芯杆包括锥形段和螺纹段，螺母与螺纹段配合，锥形段的小端于螺纹段连接，所述固定帽套装在螺纹段外侧，所述弧形衬片包括四块，四块弧形衬片设于锥形段外侧、且绕锥形段的轴线均布，四块弧形衬片尾端均与固定帽卡接；在提高了实验结果的准确性的同时减少了实验操作人员的工作强度，避免不必要的浪费，也有利于实验室整洁。