WELDING TORCH AND WELDING TORCH COOLING SYSTEM

According to an aspect of the present disclosure, a welding torch is provided. The welding torch comprises a torch head and a torch body detachably connected to the torch head. The torch head includesfirst and second torch head-side flow passageways for flowing cooling water, first and second exit/entries respectively communicating with the first and second torch head-side flow passageways, and amovable portion moveable in an axial direction of the torch head. The torch body includes a torch body-side flow passageway for flowing the cooling water, and first and second connection openings respectively communicating with both ends of the torch body-side flow passageway. When the torch head and the torch body are connected, the first and second exit/entries and the first and second connection openings respectively communicate with each other. When the torch head and the torch body are separated, the first and second exit/entries are closed by the movable portion. 根据本公开的一个侧面，提供焊枪。上述焊枪包含焊枪头和与上述焊枪头能拆装地连接的焊枪身。上述焊枪头具