Jam valve of joining in marriage vapour shaft

The utility model discloses a jam valve of joining in marriage vapour shaft, rotating and setting up on the lateral wall of shaft inner tube including hollow structure's central siphon and activity end cap, activity end cap, it has a plurality of flat pipes of vapour of joining in marriage to join in marriage on the urceolus of vapour shaft the circumference equipartition, and the central siphon is used for drive activity end cap to join in marriage the flat pipe of vapour to one of them sealing, the activity end cap includes end cap, resilient means, hydraulic piston and shores the channel -section steel, the end cap with shore the channel -section steel and set up respectively at the resilient means both ends, shore the wall connection of channel -section steel and shaft inner tube, hydraulic piston sets up the one end at the central siphon, and hydraulic piston's tip passes resilient means to be connected with the end cap, is provided with hydraulic medium and resilient means in thecentral siphon and contr