3results about How to "Large flow" patented technology

This invention provides a method for replacing a diaphragm valve and its valve seat. The diaphragm valve can suppress valve seat crushing or deformation even when performing high-speed opening and closing operations at high temperatures, and can stably ensure a high Cv value without fluctuation when operating at high flow rates. The valve seat is easy to replace. The present invention is a diaphragm valve (1), characterized in that it comprises: an outer wall portion (20) for assembling a valve seat provided in a primary side opening (13) within a main body (2); a stepped portion (21) provided in the inner periphery of the outer wall portion (20); a seat ring (4) pressed and fixed to the stepped portion (21); a flange portion (32) provided in the seat ring (4); and a pressing groove (42) for assembling a valve seat formed between the seat ring (4) and the outer wall portion (20) with the flange portion (32) as the bottom. The valve seat (3) is pressed and fixed to the pressing groove (42) such that the upper part of the valve seat (3) is slightly protruding, with the extension portion (27) of the outer periphery of the upper part of the valve seat (3) covering the position near the top (23) of the outer wall portion (20) and the extension portion (28) of the inner periphery of the upper part of the valve seat (3) covering the position near the top (35) of the seat ring (4).

The utility model discloses a kind of shell protection integrated bus duct with equipotential connection, for the equipotential protection of adjoining bus duct, including first bus duct, second bus duct and bus duct connector, two adjacent first bus duct and second bus duct between joint busbar are locked connection by bus duct connector;At least one ground connection is connected on the top side cover plate of first bus duct or and second bus duct, and the equipotential terminal for the ground safety of busbar power transmission loop between all adjacent bus ducts;At least one ground cable line for preventing current overload is connected on the equipotential terminal;Effectively increase the leakage current flow of shell and the safety of busbar power transmission loop ground, reduce the probability of single-phase ground leakage, effectively improve the efficiency of ground protection.

The application discloses a radiofrequency catheter capable of clamping tissues, which comprises a handle assembly, an inner tube, a distal electrode assembly, a proximal electrode assembly and an outer tube arranged in sequence from inside to outside; the proximal ends of the inner tube and the outer tube are connected to the handle assembly; the distal electrode assembly comprises a distal stent and a distal electrode; the proximal electrode assembly comprises a proximal stent and a proximal electrode; the distal stent and the proximal stent both have a retracted state of being retracted into the outer tube and an unfolded state of being unfolded and expanded outward after being extended out of the outer tube; when the distal stent and the proximal stent are both in the unfolded state, the distal stent and the proximal stent can clamp the atrial septum tissue on opposite sides of the atrial septum tissue; the distal electrode and the proximal electrode are firmly attached to the atrial septum tissue; during radiofrequency ablation, the distal electrode and the proximal electrode are electrified, the heat ablation effect on the atrial septum tissue is more obvious, and the deep tissue of the atrial septum is necrotic after heat ablation, which helps to delay the closure of the shunt hole and makes the patient benefit for a long time.