Pipeline leakage signal acquisition instrument based on optical fiber technology

The utility model relates to an optical fiber technology pipeline leakage signal acquisition instrument which comprises an acquisition instrument body, an optical fiber is inserted into the rear end of the acquisition instrument body, a protection assembly is fixedly connected to the rear end, close to the bottom end, of the acquisition instrument body, and the protection assembly comprises a mounting block and a second guide rod penetrating through the front end and the rear end of the mounting block and close to one side; the front ends and the rear ends of the outer sides of the first guide rod and the second guide rod are fixedly connected with blocking pieces respectively, the outer side of the first guide rod located in the middle is sleeved with a first spring, the top end of the mounting block is fixedly connected with a mounting plate, and the inner side of the mounting plate is movably connected with a moving block. A second spring is arranged between the moving block and the mounting plate, a rotat