Underground gas detection ventilation device

The utility model relates to the technical field of gas ventilation, and particularly discloses an underground gas detection ventilation device which comprises a ventilation fan body, a rectangular shell is fixed at one end of the ventilation fan body, an air opening is formed in the rectangular shell, a gas concentration detection device is arranged at the top of the rectangular shell, and two rectangular plates are symmetrically and rotationally arranged in the rectangular shell. And control mechanisms corresponding to the two rectangular plates are arranged on the side, deviating from the air opening, of the rectangular shell. According to the utility model, the air pressure at the air port can be accurately controlled and adjusted, the problem that the manual operation precision is difficult to control is effectively avoided, and the safety is higher. 本实用新型涉及瓦斯通风技术领域，具体的公开了一种井下瓦斯检测通风装置，包括通风机本体，通风机本体一端固定有矩形壳，矩形壳设有风口，矩形壳顶部设有瓦斯浓度检测装置，矩形壳内部对称转动设有两个矩形板，矩形壳与风口背离的一侧设有与两个矩形板对应的控制机构。本实用新型能够对风口处的风压进行精确控制调节，有效避免了人工操