39results about How to "Satisfied to enter" patented technology

The invention discloses a method for measuring the real-time dynamic state of rocket storage tank propellant amount. The method includes the following steps that a, a control valve controlling pressurizing gas in a pressurizing gas cylinder to enter a storage tank is closed, the pressure of a storage tank air cushion in the storage tank is measured through a storage tank pressure sensor, and a record is made; b, when air pressure is lowered to a certain degree, the pressure of the storage tank air cushion in the storage tank is measured through the storage tank pressure sensor, and a record is made; c, the volume of propellant flowing out of the storage tank in a time interval is measured through a flow meter; d, a mathematic model of a closed-opening system of the storage tank air cushion is established, and a relation formula between the size of the storage tank air cushion and the pressure of the storage tank air cushion, and a relation formula between the pressure changing amount of the storage tank air cushion and the size changing amount of the storage tank air cushion are obtained; e, after the measuring process is completed, the control valve controlling the pressurizing gas in the pressurizing gas cylinder to enter the storage tank is opened, and a user makes the pressurizing process recover. The method is high in measuring accuracy, does not need additional devices, is easy to operate and can meet the requirement that the pressurizing gas outside the spacecraft storage tank enters the storage tank.

The invention relates to a fireproof coating. The fireproof coating comprises the following components in percentage by weight: 40-70% of an aqueous resin emulsion, 5-20% of modified expanded vermiculite, 10-30% of coating additive and other fillers, and 10-30% of water. The modified expanded vermiculite is prepared by the following steps: (1) carrying out incomplete expansion calcination on vermiculite: namely removing impurities from a vermiculite raw material, putting the vermiculite raw material into a rotary kiln, heating and expanding the vermiculite raw material, and carrying out discharging to obtain incompletely expanded vermiculite with a bulk density of 1000-1200 kg / m<3>; (2) adding the incompletely expanded vermiculite into a solvent, carrying out full stirring and ultrasonic dispersing to obtain a vermiculite suspension, adding the suspension and a carbon-forming catalyst ammonium polyphosphate into a closed reaction vessel, carrying out heating to 120-180 DEG C, carryingout stirring at a high speed, and preserving heat to obtain a suspension; (3) adding a fireproof modifier into the suspension obtained in the step (2) at normal temperature, and carrying out ultrasonic dispersion, wherein the fireproof modifier consists of a low-molecular carbon source and a foaming agent; and (4) performing centrifugal separation on the solution obtained in the step (3), and performing primary drying on the precipitate to obtain the fireproof expanded vermiculite. The fireproof coating has good fireproof performance and smoke suppression performance.

The invention discloses a degaussing dustproof cell phone horn with high tone quality. The cell phone horn comprises an outer support, an inner support, a front cover, a rear cover, and a vibrating diaphragm. The inner support is installed in the inner chamber of the outer support. The vibrating diaphragm is arranged on the top end of the inner support and is located in the inner chamber of the outer support. An annular induction coil is arranged on the top end of the inner support. An annular vibrating coil is arranged in the annular area of the annular induction coil. The direction of the current flowing in the annular vibrating coil is opposite to that flowing in the annular induction coil. The front cover and the rear cover sleeve the outer side of the outer support. The inner surfaces of the front cover and the rear cover and the outer surfaces of the outer support are in gapless cooperation. The front cover and the rear cover may move up and down along the outer support and cooperate with the outer support in order to form a front vocal chamber and rear vocal chamber respectively.

A fire-proof magnesium oxide plate, which is made by mixing the following raw materials, the names and parts by weight of which are as follows: 80-100 parts of magnesium oxide; 20-30 parts of anhydrous magnesium chloride; 10-20 parts of modified expanded vermiculite foaming agent; 20-30 parts of aluminum silicate fiber; 5-10 parts of sawdust; 10-15 parts of fly ash; 8-12 parts of glass magnesium board crushed powder; 1.5-5 parts of non-woven fabric; 6-8 parts of water; The expanded vermiculite is prepared by the following steps: (1) incompletely expanded vermiculite is calcined: (2) the incompletely expanded vermiculite is added to the solvent to obtain a vermiculite suspension, and the suspension is mixed with a carbon-forming catalyst Add it into a closed reaction vessel, heat it, stir it at a high speed and keep it warm; (3) add a low-molecular-weight carbon source and a foaming agent to the vermiculite suspension, and perform ultrasonic dispersion; (4) centrifuge the obtained solution, and Preliminary drying of the precipitate was carried out to obtain fireproof expanded vermiculite. The fireproof magnesium oxide plate has good fireproof performance and smoke suppression performance.

The invention relates to a reservoir dam deformation monitoring method and system. The monitoring method includes the following steps that: 1) a reservoir dam deformation monitoring device is set; 2) the initial circular light spot images of each reference point are obtained; and 3) reservoir dam deformation monitoring is carried out. The reservoir dam deformation monitoring system includes a laser emitting device, reference point detecting devices and a main control system; the laser emitting device is arranged at one end of a dam and is used for emitting collimating laser light adopted as a reference line; a plurality of reference points with equal intervals are arranged one a ray with the laser emitting device adopted as an end point; one reference point detecting device is arranged at each reference point; the reference point detecting devices are used for detecting the subsidence and horizontal displacement of the dam; and the main control system is connected with the laser emitting device and the reference point detecting devices through a wireless communication mode and is used for transmitting detection commands, receiving detected data and performing analysis processing on the detected data. With the reservoir dam deformation monitoring method and system of the invention adopted, the automatic detection of the subsidence and horizontal displacement of the dam can be realized, the measurement accuracy of the reservoir dam is improved, and monitoring costs can be reduced.

The invention provides a heat collection evaporator with a built-in passage. The heat collection evaporator comprises a heat preservation shell and a sealed shell, wherein the sealed shell is arranged in the heat preservation shell; a heat preservation layer is arranged between the bottom part of the sealed shell and the heat preservation shell; the upper part of the sealed shell is provided with a glass cover plate; a capillary structure layer and a solar heat collection panel which covers the capillary structure layer are arranged in the sealed shell; a steam collection groove and a working medium backflow groove are prefabricated in the capillary structure layer; a working medium entering the capillary structure layer can be evaporated after heat is absorbed by the solar heat collection plate, so that the heat can be supplied. The invention also provides a solar water heater with the heat collection evaporator, wherein the heat collection evaporator and a water storage tank are communicated through a loop pipeline. According to heat collection evaporator and the solar water heater, provided by the invention, the requirement of mid-rise buildings on the whole attractiveness can be met; meanwhile, power-free cycle of the working medium can be realized by utilizing the capillary action of the capillary structure, the installation of the whole solar water heater is simple, the working medium can be driven without other power, and the daily demands of people can be met.