47results about How to "Increase fluid volume" patented technology

The invention provides an urban turbojet fire vehicle. The fire vehicle comprises a vehicle chassis. An ultrafine dry powder tank is arranged on the vehicle chassis. The ultrafine dry powder tank is connected with a nitrogen cylinder pressure vessel. The nitrogen cylinder pressure vessel is connected with a water pump system. The water pump system is connected with a liquid tank assembly. The liquid tank assembly is connected with a turbojet engine jet assembly. A jet device for fire extinguishing comprises a jet device. The jet device is connected with a central revolved body through a connection pipe. The urban turbojet fire vehicle has large jet power, can jet out a mass flow of 'tail gas-water spray-ultrafine dry powder' three-phase jet flow fire extinguishing agents in a short time, and has excellent capabilities of controlling fire behavior, extinguishing big fires and cooling fire scenes by aeration from the three-dimensional space. The urban turbojet fire vehicle plays an important role in extinguishing high-rise building fire disasters, unattended dangerous chemical warehouse fire disasters, underground garage fire disasters, cable trench fire disasters, tunnel fire disasters, historic building fire disasters and steamship cabin fire disasters.

A preparation method for low-temperature curing conductive copper paste, which belongs to the field of flexible electronics. The raw material composition of the conductive copper paste is as follows in terms of mass percentage: copper salt 20%~53%, nano copper powder 0.25%~5%, binder 0.1% ~3%, solvent 10%~30%, reducing agent 35%~55%; first add binder to the solvent to form a mixed solution, then add copper salt and nano-copper powder to the mixed solution, and finally add reducing agent to form Mix the slurry, control the viscosity of the mixed slurry to 10Pa·s~60Pa·s; add the mixed slurry to the planetary mixer and stir for 20-60 minutes for a dispersion; add the mixed slurry after the first dispersion to the three-roll mill After secondary dispersion, the obtained conductive copper paste can be cured at a low temperature below 180°C, which is suitable for circuit printing in flexible devices or the preparation of electronic components, and all raw materials are non-toxic and harmless, meeting the requirements of green production.

A drilling system (10) including a drill string (13) which extends from a floating drilling rig to a well bore, and a tubular riser (12) which surrounds at least part of the portion of the drill string (13) between the well bore and drilling rig, the riser (12) having a telescopic joint (20) between a first tubular portion and a second tubular portion of the riser, the first tubular portion extending down to a well head at the top of the well bore and the second tubular portion extending up towards the drilling rig, the telescopic joint (20) comprising an inner tube part (20b) which is mounted within an outer tube part (20a), the drilling system (10) further including a riser closure device (26) which is mounted in the second tubular portion of the riser (12) and which is operable to provide a substantially fluid tight seal between the riser (12) and the drill string (13) whilst permitting the drill string (13) to rotate relative to the riser (12).

The invention relates to a method designing a multi-overflow tray by an equal residence time method, which is intended to raise tray mass transfer efficiency and processing capability, and alleviate amplification effect of equipment. The method is defined by residence time of the liquid on a tray bubbling zone, integrates advantages using an equal channel length method and an equal bubbling area method, takes regard of a contraction effect of a tower wall to a liquid flow and influence of physical property condition on the flow, and provides a calculating formula of the channel length in the tray bubbling zone under the equal residence time. Downcomer weirs on the edge at two sides of the tray are in a backswept weir structure, in order to increase overflow circumference length of the downcomer at two sides. A lower edge of an eccentric downcomer uses an arc or tooth-form structure, in order to balance a bottom gap outlet area of the downcomer. A liquid distribution plate is arranged in a liquid accepting plate, in order to balance liquid flow distribution at two sides of the downcomer. The method enables the liquid flow on each tray bubbling zone to have similar residence time and mass transfer efficiency, and achieves effects of reasonably distributing liquid, promoting gas and liquid uniform distribution and alleviating amplification effect of the tower equipment. The method is particularly suitable for large-scale tower equipment with high gas-liquid phase load.

The invention discloses a switch valve and a gas-filling device of a gas cylinder. The gas-filling device comprises the switch valve connected to a gas cylinder, a manual inflator, and a connection pipe for connecting the switch valve and the manual inflator. The switch valve comprises a valve seat which is connected to an opening of the gas cylinder, a switch unit which is installed on the valve seat and is used for releasing a liquid and blocking a liquid from entering into the gas cylinder, and a connection unit. The connection unit comprises a plug located at one side of the valve seat and a joint located at the other side of the valve seat. The adjacent switch valves can be connected by the opposite plugs and joints so that multiple gas cylinders can be communicated and thus a stored liquid amount is greatly improved and practicality and use convenience are obtained.

The invention relates to a paper feeding control method for a paper tape filter. One serial port of the computer is connected to the float placed on the upper part of the filter paper in the liquid accumulation tank through an external cable; Connected to the motor that moves the filter paper on it. By adjusting the height of the float on the filter paper and the length of the external cable of the float, it is in the best position; by adding a timing controller in the PLC program, the signal transmitted by the float is converted into a motor rotation signal, when the timer reaches the set time After that, send a stop signal to the motor to stop the motor from running. Because the present invention adopts the control mode of delayed start and stop of the motor, the number of starts of the motor is sharply reduced and the service life is improved. The immersion time and area of ​​the wire mesh chain in the grinding fluid are reduced, and the chance of corrosion is reduced. And the consumption of filter paper can be reduced by 3 times. It is suitable for the filtration of roll grinding fluid.

Disclosed is a closed type mechanical sealing pump efficiency ring. The pump efficiency ring is provided with annular left side plate (701) of the pump efficiency ring and right side plate (702) of the pump efficiency ring mutually arranged in parallel; inner rings of the left side plate (701) of the pump efficiency ring and the right side plate (702) of the pump efficiency ring are sheathed on a peripheral surface of a shaft sleeve (12) of a centrifugal pump, peripheries of the left side plate (701) of the pump efficiency ring and the right side plate (702) of the pump efficiency ring are linked to a sealing gland of the centrifugal pump and have gaps, a plurality of blades (703) rotationally arranged in a radiation state is arranged between the left side plate (701) of the pump efficiency ring and the right side plate (702) of the pump efficiency ring, the plurality of blades (703) is in vertical arrangement with the left side plate (701) of the pump efficiency ring and the right side plate (702) of the pump efficiency ring, end openings formed by closing-in ends of the plurality of blades (703) in the radiation state correspond to a liquid outlet of the shaft sleeve (12), and end openings formed by radiating ends of the plurality of blades (703) in the radiation state correspond to a liquid inlet formed on a liquid outlet passage on the sealing gland. Also disclosed is a shaft seal flushing system having the pump efficiency ring. The pump efficiency ring enables the majority of a liquid in a sealing cavity to flow, increases an accelerated distance of the liquid and lengthens a flowing path of the liquid, thereby enlarging the orifice area.

The invention relates to a 4V lead-acid storage battery for navigation aids, which is characterized in that it includes a battery case, a battery cover, a positive pole, a negative pole, a bus bar group, an electrode group assembly, and a cover sheet, wherein a cavity is provided on the battery case, and Electrolyte is provided in the installation cavity; the pole group assembly includes the first pole group, the second pole group, the third pole group, the fourth pole group, the fifth pole group, the sixth pole group, the pole group The first pole group, the second pole group, and the third pole group are respectively arranged in three of the mounting cavities and connected in parallel through the bus bars, and the fourth pole group, the fifth pole group, and the sixth pole group They are respectively arranged in the other three placement cavities and connected in parallel through bus bars. The positive and negative poles are respectively connected to the corresponding bus bars. The battery cover is placed on the battery case, and the positive and negative poles are inserted into the battery cover. The invention has the advantages of convenient assembly, high reliability, high safety, long service life and the like.