51results about How to "Large flow range" patented technology

The flow sensor serves to measure an electrically conductive fluid flowing in a pipe. It comprises a flow tube designed to be inserted into the pipe for conducting the fluid, the flow tube being electrically nonconductive at least on a fluid-contacting inner side, an electrode arrangement consisting of at least two measuring electrodes disposed on the flow tube for picking up a voltage induced in the fluid, and a magnetic field system likewise disposed on the flow tube. The magnetic field system comprises at least two saddle-shaped field coils for producing a magnetic field cutting the fluid during operation of the flow sensor, a respective ferromagnetic pole piece for each of the two field coils, as well as at least one ferromagnetic return path extending around the flow tube upstream of the two field coils and at least one ferromagnetic return path extending around the flow tube downstream of the two field coils for directing the magnetic field around the flow tube. The pole pieces are magnetically coupled to the return paths by means of ferromagnetic coupling elements. Each of the, preferably identically shaped, coupling elements has at least one essentially trough-shaped cover segment which receives a first winding section of the respective associated field coil, lying essentially on a first periphery of the flow tube, or a second winding section of the associated field coil, lying essentially on a second periphery of the flow tube.

A mass flow sensor is manufactured by a process of carrying out a micro-machining process on an N or lightly doped P-type silicon substrate with orientation <100>. This mass flow sensor comprises a central thin-film heater and a pair of thin-film heat sensing elements, and a thermally isolated membrane for supporting the heater and the sensors out of contact with the substrate base. The mass flow sensor is arranged for integration on a same silicon substrate to form a one-dimensional or two-dimensional array in order to expand the dynamic measurement range. For each sensor, the thermally isolated membrane is formed by a process that includes a step of first depositing dielectric thin-film layers over the substrate and then performing a backside etching process on a bulk silicon with TMAH or KOH or carrying out a dry plasma etch until the bottom dielectric thin-film layer is exposed. Before backside etching the bulk silicon, rectangular openings are formed on the dielectric thin-film layers by applying a plasma etching to separate the area of heater and sensing elements from the rest of the membrane.

A biomass-mixed, pulverized coal-fired burner is provided, capable of burning biomass fuel as auxiliary fuel in large quantities and burning only pulverized coal when the biomass fuel is not sufficiently available. The biomass-mixed, pulverized coal-fired burner includes a biomass fuel jet nozzle that extends axially along the biomass-mixed, pulverized coal-fired burner, a fuel jet nozzle that is open midway in the biomass fuel jet nozzle, a secondary air nozzle that surrounds the fuel jet nozzle, and a tertiary air nozzle that surrounds the secondary air nozzle. A pulverized coal component in a fuel stream as a mixture of the pulverized coal fuel stream and the biomass fuel stream is distributed with a higher concentration on an outer circumferential wall side and a biomass fuel component in the fuel stream is distributed inside of the pulverized coal fuel component.

This invention discloses a small-sized drill pile-up valve, which comprises a valve body. The small-sized drill pile-up valve is characterized in that: a reversing valve, an overloading valve and a balanced one-way throttle valve are arranged in the valve body; the valve cavity of the overloading valve and the valve cavity of the balanced one-way throttle valve are communicated with the valve cavity of the reversing valve through casting flow channels respectively; and the valve body is provided with a first oil port, a second oil port, a third oil port, a fourth oil port and a pressure gauge port. The integrated control valve adopts an inserting mode, is organically fused and integrated with the reversing functions into a whole, has the advantages of compact structure, high working pressure, low loss of flow channel pressure, sensitive feedback, convenient operation, attractive appearance, and convenient maintenance. The small-sized drill pile-up valve is suitable for coal seam drilling machinery and small-sized drilling machinery for geological prospecting, is also suitable for small-sized engineering machinery, highway machinery, environmental health sanitation machinery, agricultural machinery and the like.

The invention provides a marine steam flow measuring device and method. The device comprises a flow measuring assembly and a flow converter, the flow measuring assembly is composed of a throttle pipesection, a pressure guide pipe, a valve set and a sensor assembly, connecting flanges are arranged at the two ends of the throttle pipe section, two ends of the throttle pipe section are connected with a steam pipeline, and the sensor assembly is provided with a pressure sensor and three differential pressure sensors with different measuring ranges and is connected to the throttle pipe section through the valve set and the pressure guide pipe; and the flow converter comprises a shell, a signal acquisition module, a signal processing module and a power module are arranged in the shell, a display screen is arranged on the front face of the shell, and a plurality of electric connectors are arranged on the two side faces of the shell and are connected with an external power source, the sensorassembly and an upper computer respectively. The straight pipe section of the flow measuring assembly is short, other special requirements of the straight pipe sections on the upstream and the downstream are avoided, and saturated steam measurement can be conducted in a narrow space of a ship.

The invention provides a parallel structure and detection method of dual-gas flow standard device, and relates to the technical field of measurement. The gas source is connected with a tested flow meter, and the tested flow meter is respectively connected with a bell jar and a standard gas flowmeter through a tee joint; the gas accumulation amount of the bell jar, the standard gas flow meter and the tested flow meter is calculated through the pulse calculation, the gas accumulation amount of the bell jar and the standard gas flow meter is converted into the gas accumulation amount under the pressure and temperature state of the tested flow meter and is added to obtain a standard gas magnitude, and the measured flow meter value error is calculated according to the gas accumulation amount ofthe tested flow meter. The parallel structure and detection method of dual-gas flow standard device solves the technical problems that in the prior art, only the 'single type' standard device value is adopted, the flow range cannot be expanded, and the pressure loss is large. The parallel structure and detection method of dual-gas flow standard device has the advantages that different detection methods are achieved on the same set of devices, and meanwhile, the method is applied to the operation process; compared with a single or serial standard device, the flow range is larger; the test is richer than that of the method; the pressure loss is smaller.

The invention discloses a large-range flow meter and a flow adjusting method thereof. The large-range flow meter comprises a shell, the shell internally comprises a liquid inlet channel, a measuring channel and a liquid outlet channel which are connected in sequence, and the liquid inlet channel is connected with the measuring channel through a channel inlet; a spring and a floater are arranged inthe measuring channel; a piston valve seat and a piston rod are arranged in the liquid inlet channel, the piston rod is sleeved with a reset spring, and a piston is arranged on the piston rod; and the flow meter further comprises an opening degree control mechanism which drives the piston rod to move and drives the piston rod to generate at least two stroke changes from an initial state. The large-range flow meter can provide a large-range flow measurement function, and theoretically, the flow range measured by the flow meter can be infinitely large due to the fact that the opening degree control mechanism drives the piston rod to generate a plurality of stroke changes from the initial state. The flow meter and flow measuring method have the advantages of simple structure, sensitive index, high sensitivity and large measurement range.

The invention discloses a urea condensate pump. The pump comprises a first shaft and a second shaft which are arranged coaxially, wherein the right end of the first shaft is detachably connected with the left end of the second shaft; a bearing sleeve, a third shaft sleeve and a couplingsleevesthe second shaft in sequence from the left end of the second shaft; a bearing seat and a bearing seat end cover connected with the bearing seat sleeve the bearing sleeve and the third shaft sleeve separately; a bearing sleeves the third bearing sleeve, and the axial movement of the bearing along the third shaft sleeve is limited by a round nut; the bearing seat end covercommunicateswith a bend pipe; the second shaft is sleeved by a stopper ring, a second shaft sleeve and a fixed sleeve from the left end to the right end; the second shaft sleeve is sleeved by a first shaft sleeve, a spring, a movable ring, a static ring and a cooling sleeve from the left end to the right end; a first pipe joint communicatingwith the side wall of the cooling sleeve is a coolant inlet, a second pipe joint communicatingwith the side wall of the first shaft sleeve is an outlet; a pump port, an impeller sleeve, an impeller and a medium shell sleeve the first shaft in sequence from the left end; a diversion disk communicating with the pump outlet sleeves the impeller sleeve by the bearing; and the axial movement of the impeller along the first shaft is limited by a fourth screw.