| 摘要 |
A gate valve with an integrated operating medium represents a new solution for using the potential energy of the operating medium for better drive reliability and easier activation of the gate valve. The design solution of this problem consists of two components: the distributor, which takes over the function of pressure equalisation of the operating medium in the centre part of the valve housing with the pressure in the feed line, as well as the medium flowing out of the centre part of the valve housing into the pipeline, if the pressure exceeds the permitted limit or in the case of pre-opening of the gate valve, when it is necessary to direct the force of the medium against the shut-off body in the direction of its opening, and thereafter to activate the drive elements. The distributor can be hydraulically, electronically, electrically, mechanically or manually controlled. The inner body part of the valve, with a mechanism for blocking and automatically adjusting the angle, is used for absorbing the kinetic energy of the operating medium in the closing phase of the gate valve. In this way, it is also possible to neutralise the consequences of hydraulic shocks in the pipeline while the gate valve is closed. The invention provides for the manufacture of gate valves from the smallest to the largest nominal widths with the capability of connection on both sides for all fluids without paraffin components. <IMAGE> |
