37results about How to "No change in traffic" 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.

The invention relates to a device which carries out the filtration on the fluid medium conveyed by the pipeline, in particular to a cleanable filter which can realize the hydrocyclone separation, surface interception and deep filtration of the impurity in the fluid medium at the same time. The filter is provided with an inlet pipeline, a filter unit group, a sewage drainage pipeline and an outlet pipeline; the filter unit group is internally provided with a standby filter unit; an inlet cutting valve is arranged between all filter units of the inlet pipeline and the filter unit group; the inlet pipeline is connected with each filter unit by the inlet cutting valve; an outlet cutting valve is arranged between all filter units of the outlet pipeline and the filter unit group; the output pipeline is connected with each filter unit by the outlet cutting valve. The device of the invention can carry out the maintenance under the situation that shutdown is not necessary and the pipeline normally conveys the medium, can replace the filter unit; furthermore, when the impurities are automatically back-cleaned, the pressure and flux of the conveyed medium can be ensured to be stable.

The invention discloses a performance testing device for an oil pump. The device comprises a workbench, an oil tank, a control module and a data display module, wherein the oil tank is communicated with an oil suction port of an oil pump to be detected; an oil outlet of the oil pump to be detected is communicated with an oil discharging pipe; the outlet end of the oil discharging pipe is communicated with a main oil pipe and a return oil pipe; outlets of the main oil pipe and the return oil pipe are communicated with the oil tank; a flow sensor, a first pressure sensor and a first pressure regulation valve are sequentially connected to the oil discharging pipe along an oil discharging direction; a second pressure sensor is connected to the main oil pipe; a second pressure regulation valve is connected to the return oil pipe. According to the performance testing device for the oil pump, a changing relationship between the pressure and the flow of an outlet of the oil pump at different temperature is simulated and tested at the same temperature, and the device is short in testing time and high in testing efficiency.

The invention discloses a layered gradient porous material sweating cooling structure and an aircraft. The sweating cooling structure comprises N layers of porous material layers and a cooling cavity arranged on one side of the porous material layer. A coolant supply unit is arranged in the cooling cavity , the coolant supply unit is used to supply coolant to the cooling cavity, the porosity of the porous material layer decreases layer by layer along the direction close to the cooling cavity, wherein, N is an integer, N≥2. The invention solves the problems of uneven heat dissipation, poor heat protection effect, high cost and the like existing in the sweating cooling structure in the prior art.

The invention provides a pneumatic type wave energy power generation device which is mainly used for ocean wave energy power generation. According to the pneumatic type wave energy power generation device, large-scale power generation can be achieved, the quantity of generated power is stable, and the power generation device can be directly connected to the national power grid. The pneumatic type wave energy power generation device is mainly composed of a pushing plate 1, a rotating rod 2, a shell 3, a floating box 4, a pushing rod 5, a spring 6, a piston 7, a pneumatic cylinder 8, a pushing chamber 9, an air inlet pipe 10, an air inlet one-way valve 11, a one-way valve 12, an energy storage chamber 13, a constant pressure valve 14, a generator set 15, a generator chamber 16, a deflector 17, a hole A 20 and a hole B 21. The main operating principle of the pneumatic type wave energy power generation device is that sea waves impact the pushing plate 1 to move to the left, the pushing plate 1 pushes the piston 7 to move to the left through the pushing rod 5 so that air in the pneumatic cylinder 8 can be compressed and fed into the energy storage chamber 13, and the compressed air in the energy storage chamber 13 is subjected to equal-pressure releasing through the constant pressure valve 14 to blow a rotor of the generator set 15 to rotate, so that a generator generates power.

The present invention provides a constant temperature air circulation system. Air valves are installed behind the main circulation loop and the two three-way nodes of the parallel bypass to adjust the gas flow of each branch. When the compressor keeps the current state unchanged, the fan and wind The valve does not change. When the compressor needs to be turned from on to off, adjust the air volume of the fan and adjust the flow of the bypass and main road synchronously until the air valves controlling the flow of the evaporator are all closed and the bypass air valves are fully opened; when the compressor needs to be turned from off to on , adjust the air volume of the fan, and adjust the flow of the bypass and main road synchronously until the air valves controlling the flow of the evaporator are all opened and the bypass air valves are all closed. The adjustment of the air valve and the switching of the compressor state always ensure that the flow through the heater to the cavity remains unchanged. The invention saves energy on the system by auxiliary switching of the working state of the refrigeration heat exchange device through the bypass, and ensures that the switching of the working state of the refrigeration heat exchange device does not affect the flow rate and temperature of the gas flowing through the constant temperature chamber.

The invention discloses a steady flow spraying device. A water inlet pipe and an air inlet pipe are arranged on a base, an atomization chamber is arranged at the front end of the base, the air inlet pipe is communicated with the atomization chamber, and the water inlet pipes are evenly arranged at the positions corresponding to the atomization chamber. There are a plurality of water inlet holes, the water inlet holes form a water inlet area, and an adjustment structure is arranged in the water inlet area, and the adjustment structure is used to keep the flow rate entering the atomization chamber from the water inlet pipe unchanged. When the water flow enters the atomizing chamber through the water inlet hole of the water inlet pipe, the water droplets are blown and broken into smaller mist droplets under the high pressure gas, which improves the atomization effect. At the same time, when the water pressure in the water inlet pipe is small, the adjustment structure makes Multiple water inlet holes are connected with the atomization chamber, which increases the water flow area and ensures that the flow rate remains unchanged under the condition of low water speed. When the water pressure in the water inlet pipe is large, the adjustment structure blocks the corresponding water inlet holes, only The corresponding water inlet hole is communicated with the atomization chamber, reducing the area of ​​the water outlet, ensuring that the flow rate remains unchanged under the condition of high water speed, thereby ensuring the stability of the nozzle spray.

The invention discloses a fixed-quantity pump speed-regulating hydraulic system for engineering machinery. A pump-motor integrated machine is connected in series between a working pump and an engine. The outlet of the pump-motor integrated machine is connected to a control valve for controlling the outlet flow of the pump-motor integrated machine. , so as to adjust the speed ratio between the working pump and the engine. The control valve is controlled by the pressure at the outlet of the pilot valve, the outlet pressure of the signal pump and the working pump. The greater the speed ratio of the engine, the greater the output flow of the working pump to meet the system demand. When the load pressure changes or the engine speed changes, the control valve adjusts the output flow of the pump-motor integrated machine to ensure that the speed of the working pump remains constant and the system flow is stable, that is, the system flow is not affected by the load and engine speed, reducing throttling loss. It has high energy-saving benefits, adopts quantitative pump and non-load sensitive control valve, has strong anti-pollution ability, simple system components and convenient maintenance.

The invention discloses a buffer layer growth method of silicon carbide epitaxial material, which adopts low-high C / Si ratio switching at the end of low-speed buffer layer growth, and quickly completes the switching in a short time, so as to increase the C / Si ratio more quickly. . By adopting an optimized process switching process between the buffer layer and the epitaxial layer, the present invention realizes that the carbon-to-silicon ratio (C / Si) remains stable over time during the switching process between the growth of the low-speed buffer layer and the growth of the high-speed epitaxial layer. The carbon source flow rate and the silicon source flow rate are both very low, and a relatively small increase in the carbon source flow rate can meet the requirements for improving the C / Si ratio, reduce the defects and stress introduced by the low-speed to high-speed rate switching process, and reduce the defects of epitaxial materials. Density to achieve high-quality SiC epitaxial material growth.

The invention discloses a high pressure heat insulation gas storage pumping compressed air energy storage system. Air in a water-gas common-cabin passes a supercharger and then directly enters a gas storage vertical shaft, and pressure of gas in the water-gas common-cabin passes is kept stable and unchanged. Potential energy and heat of compressed air are stored at the same time because of the thermal storage effect of the gas storage vertical shaft. At the stage of energy releasing, output electric energy of the system comprises the following two parts: for one part, high pressure air with certain temperature in the vertical shaft enters a turbine to do work through expansion; for the other part, water in the water-gas common-cabin pushes the turbine to generate electric energy, and the energy density and operating efficiency of the system are improved. As a heat insulating layer is arranged outside the gas storage vertical shaft, the air is high in temperature and flows through the turbine and is expanded, then the temperature is reduced, the fact that the temperature in the water-gas common-cabin is low is guaranteed, and damage to the turbine caused by temperature rise of wateris avoided. The system stores high pressure air through the gas storage vertical shaft, greatly reduces the investment cost of a high pressure container, shortens the payback time, and improves the operating economy.