Track circuit choke transformer

The invention belongs to the technical field of track circuit equipment, and particularly relates to a track circuit choke transformer which comprises a transformer body. A plurality of groups of terminals are fixedly connected to one side of the transformer body, a protective shell is fixedly connected to the side, close to the terminals, of the transformer body, a sealing plate is slidably connected to the top surface of the protective shell, a sliding groove is formed in one side of the sealing plate, and a positioning block is slidably connected to the inner wall of the sliding groove; a first spring is fixedly connected between the side, close to the sealing plate, of the positioning block and the inner wall of the sliding groove. And when the terminal is not used, the protective shell can be sealed by virtue of the sealing plate, and at the moment, the protective shell can protect the terminal, so that the transformer body can operate more stably. 本发明属于轨道电路设备技术领域，具体的说是一种轨道电路扼流变压器，包括变压器本体；所述变压器本体的一侧固定连接有