Simple wellhead for coal mine underground fracturing

The utility model relates to a simple well mouth for coal mine underground fracturing, the well mouth is a four-way structure or a three-way structure, the four-way structure comprises four gates, two of the four gates are 350 type gates and two 250 type gates, the four gates are connected with corresponding pipelines and instruments through flange plates, the four flange plates are a flange plate (1), a flange plate (2), a flange plate (3) and a flange plate (4), and the flange plate (1), the flange plate (2), the flange plate (3) and the flange plate (4) are connected with the flange plate (1). Wherein the flange plate (1) is connected with one 350-type gate, the flange plate (2) is connected with the other 350-type gate, the flange plate (3) is connected with one 250-type gate, a cock and a pressure gauge are connected at the gate, and the flange plate (4) is connected with the other 250-type gate and used for backflow after pressure. 本实用新型涉及一种煤矿井下压裂的简易井口，所述井口为一个四通结构或三通结构，所述四通结构包括4个闸门，其中2个为350型闸门和2个250型闸门，