54results about How to "Avoid leakage loss" patented technology

A bucket for a steam turbine includes an airfoil portion having a radially outer tip, the radially outer tip having a thermal barrier coating applied thereto, and wherein the thermal barrier coating is resurfaced to form at least one ridge along the radially outer tip.

The invention discloses a method and a device for producing refined brine by utilizing bromine extraction brine. The method comprises the following steps: adjusting the pH value of the bromine extraction brine to 5-8, intercepting solid particles and mechanical impurities through mechanical microfiltration, adding a reducing agent to remove oxidized substances, carrying out ultrafiltration to remove small particles, colloids and macromolecular organic compounds, then, removing most of sulphate radicals and calcium and magnesium ions through nanofiltration interception so as to obtain brine dissolved raw salt, preparing the brine dissolved raw salt into saturated brine, further refining to remove the calcium and magnesium ions by adopting a chemical method so as to obtain refined brine and brine sludge, and returning the brine sludge back to the first step to adjust the pH value of the bromine extraction brine. By means of the method disclosed by the invention, high-efficiency utilization of sodium chloride in the bromine extraction brine is realized; the sun-curing and dissolving processes of a part of sodium chloride are saved; the leakage loss of underground salt brine resources in the salt basking process is avoided; the recovery rate of raw salt in the bromine extraction brine is increased; furthermore, the brine refining cost of a sodium carbonate factory is lowered, so that the production cost is lowered.

The invention relates to an optical fiber employable in an optical communication system using Raman amplification and adapted to improve OSNR and suppress bending loss at the same time, and the like. The optical fiber is a silica-based optical fiber having a depressed refractive index profile constituted by at least a core, an inner cladding having a low refractive index, and an outer cladding, an effective area Aeff of 110 μm2 or more at the wavelength of 1550 nm, and a fiber cutoff wavelength λc of 1.3 μm or more but 1.53 μm or less. The depressed refractive index profile is designed such that the ratio Ra(=2b / 2a) of the diameter of the inner cladding to the diameter of the core is 2.5 or more but 3.5 or less and that the relative refractive index difference Δ− of the inner cladding with respect to the outer cladding is at least the relative refractive index difference Δ−min where the bending loss at the wavelength for use is minimized but not exceeding (Δ−min+0.06) %.

A protection device which is capable of cutting off a pipeline when the pipeline leaks due to the rupture of the pipe self-operatedly closes the pipeline using fluid kinetic energy. A control rod converts linear movement of a piston into the opening and closing movement of a main valve core. The piston separates a hydraulic cylinder chamber into a first chamber and a second chamber. A restoring spring in the first chamber restores a control piston to an initial position. A control valve in the second chamber controls discharge of fluid from the second chamber. A flow state-sensing device introduces fluid in the fluid pipe to the second chamber when the fluid pipe ruptures and leaks.

In a hydraulic control device H comprising a pressure source P which can be switched on and switched off, a reservoir R and a pressure switch W located in a discharge path 13 from a valve assembly V to the reservoir R, which pressure switch W either connects the valve assembly V with the reservoir R or blocks the valve assembly V versus the reservoir R, the pressure switch W contains a displaceable control member 16 which is actuated in a first switching direction by a spring 17 and a pilot pressure originating from the pressure P1 acting at the valve assembly V and in a second switching direction to a control position blocking the discharge path 13 by a pilot pressure originating from the supply pressure of the pressure source, the pressure switch W is designed as a 2 / 2-multi-way seat valve 16 operating with a blocking position without leakage. A valve member 24 forms the control member 16 and co-operates with a valve seat 25 arranged in the discharge path 13. The pressure source P and the valve assembly V are permanently connected via a main channel 10, 11 containing a restrictor D. The discharge path 13 branches off from the main channel 10, 11, 12 between the valve assembly V and the restrictor D. The pilot pressure actuating the valve member 26 in the switching direction towards the valve seat 25 originates from the supply pressure taken between the pressure source P and the restrictor D.