35results about How to "Play the role of steady flow" patented technology

The invention relates to the technical field of gas detection, and discloses a gas detection device and a detection method. The detection device comprises a mixer, a gas delivery device to be measured, a catalytic gas delivery device and a catalytic combustion sensor, and a flow guide is arranged in the mixer. A premixed material area, a first air guide area and a second air guide area are formed in the mixing area. The gas conveying equipment to be tested is connected to the first air guide area, and the catalytic gas conveying equipment is connected to the second air guide area. The area is connected and can transport catalytic gas to the premixed material area, the gas to be tested and the catalytically promoted gas are mixed in the premixed material area to form a mixed gas, and the mixed gas is guided to the catalytic combustion sensor through the diversion area; the detection method comprises S1: The gas to be tested and the catalyst-promoting gas are delivered to the mixer for mixing to obtain a gas sample to be tested; S2: the gas sample to be tested is detected by a catalytic combustion sensor to obtain a flammable gas concentration value.

The invention discloses a small-sized air compressor for environmental protection construction and its use method, which belongs to the field of air compressors. It uses the principle of aerodynamics to make two pneumatic parts approach each other under the action of air flow, so that the front and rear sections There is a large mutation in the area to improve the noise reduction effect, and the greater the airflow intensity, the greater the change in the cross-sectional area of ​​the aerodynamically deformable shell, and the better the noise reduction effect. The annular cavity inside the aerodynamic weakening part is used to weaken the airflow The flow rate, and two air inlet holes and one air outlet hole can allow the airflow to form convection, which has a certain noise reduction effect. The porous airflow disturbance ball is used to further weaken the airflow velocity, and finally the airflow passes through the airflow distribution pipes with different inner diameters. Ejection, once again uses the sudden change of the cross-sectional area to reduce noise, and further improves the noise reduction effect. Compared with the existing technology, it realizes the dynamic change of the cross-sectional area, and strengthens the effect of using the sudden change of the cross-sectional area to reduce noise.

A forest fire extinguishing missile, comprising: a missile main body, a storage tank, a fire extinguishing injection device, a side injection device, an attitude adjustment device, the storage tank stores fire extinguishing agent and forward fuel of the missile, and the side injection device and the attitude adjustment device are controlled by a gear connecting rod. Spray at different angles to control the route of the missile, so that the missile can reach the fire area accurately. The fire extinguishing device sprays the fire extinguishing agent powerfully to cover the fire extinguishing area. The fire extinguishing agent is in the form of solid particle powder, which can make full use of the advantages of terrain and wind speed to extinguish the fire. , The forest fire extinguishing missile can be reused, respond in time after finding a fire, quickly reach the fire area, extinguish the forest fire, avoid the casualties of firefighters, and reduce the loss caused by the forest fire.

The present invention is a low-nitrogen gas burner based on heat pipe heat exchange, which includes an air-fuel mixing section and a combustion head sequentially connected along the gas flow direction; a gas nozzle is arranged in the air-fuel mixing section; the combustion head includes several The heat pipes are arranged in a tube bundle. The evaporation heat absorption section of the heat pipe in the tube bundle is arranged to form a combustion gap as a combustion head, and the condensation heat release section of the heat pipe is provided with a condensing device and arranged outside the furnace. In the present invention, the combustion head consisting of several heat pipes arranged intermittently is arranged between the furnace and the air-fuel mixing section, and the two phase-change heat processes of evaporation heat absorption and condensation heat release in the heat transfer process of the heat pipes have good thermal conductivity and isothermal properties and other advantages, so that the working fluid in the tube of the heat pipe absorbs the heat of the combustion zone of the furnace in the heat pipe evaporation heat absorption section and evaporates into steam, and condenses and releases heat by using a condensing device such as air cooling or water cooling, and the liquid in the tube after the steam releases heat and condenses flows back to the suction through gravity. The hot section effectively solves the damage caused by the water circulation of the water-cooled burner to the boiler hydrodynamic circulation.

The invention relates to the technical field of gas turbines, and specifically discloses a premixed fuel nozzle for a combustion chamber of a gas turbine, comprising: a central cone, the central cone is a hollow structure, and the hollow cavity of the central cone is a central fuel passage; The flow shell is set on the periphery of the central cone and arranged coaxially with the central cone, and there is an annular air passage between the flow guide shell and the central cone; the radial fuel pipe is arranged radially on the central cone Between the body and the diversion shell; the auxiliary cone, the auxiliary cone is arranged on the radial fuel pipe and arranged parallel to the central cone, the auxiliary cone is a hollow structure, and the hollow cavity of the auxiliary The central fuel channel is connected, and fuel injection holes are arranged on the auxiliary cone. The invention can reasonably control the flow of fuel and air to produce a better mixing effect and form a stable flame downstream of the nozzle.

The invention relates to an optical fiber drawing furnace comprising a furnace body, a heating element, a heat preservation element, a middle casing pipe, a flow guide pipe, an extension pipe and a furnace top gaseous disc. The optical fiber drawing furnace is characterized by further comprising a lantern ring, an elastic graphite ring and a gas guide disc. The gas guide disc is mounted on the furnace top gaseous disc. The elastic graphite ring is mounted on a hollow ring plate. The lantern ring is arranged between the flow guide pipe and the extension pipe. A plurality of first air inlet holes can be formed in the side wall of the extension tube at the upper end of the lantern ring. The optical fiber drawing furnace has the advantages of being applicable to drawing prefabricated bars in large diameter and optical fiber prefabricated bars with large diameter fluctuation, meanwhile ensuring that graphite dust has less possibility of being adhered to the prefabricated bars, and effectively controlling the air flow state in the drawing furnace.

The invention relates to a water flow stabilizing valve and a gas water heater using the valve, wherein the water flow stabilizing valve includes a pipe body, the lower part of the pipe body is provided with a water inlet, and the upper part is provided with a water outlet; In the pipe body, the partition plate is provided with a water outlet connecting the water inlet and the water outlet; the adjustment plate is located below the partition board and is set against the partition board, and the adjustment board is provided with a water outlet that can correspond to or stagger the water outlet. the water hole; the guide column is vertically arranged in the pipe body, and the outer peripheral wall of the guide column is provided with a guide groove extending spirally along its axial direction; the first plate body is located under the adjustment plate and the two are linked together, The first plate body is provided with a guide block placed in the guide groove, and the first plate body can move upward relative to the guide column under the action of water flow; the first elastic member acts on the first plate body, Keep the first plate body moving downward to play the role of steady flow.

The invention discloses a factory purification ventilation system, which comprises a casing, wherein a left expansion chamber casing is arranged at the left lower end of the casing; a right expansion chamber casing is arranged at the right lower end of the casing; air passing passages are arranged in a connecting position of the left expansion chamber casing and the casing and a connecting position of the right expansion chamber casing and the casing; a movable plate is arranged in the position of each air passing passage; an air inlet hole is formed in the left end of the left expansion chamber casing; the upper end of the right expansion chamber casing is connected with a gas collecting head through an air inlet hose; a left air inlet fan is arranged in the left expansion chamber casing; a right air inlet fan is arranged in the right expansion chamber casing; an active carbon adsorption drawer is arranged in the casing; the upper end of the active carbon adsorption drawer is provided with a current stabilizing plate; air passing holes are formed in the current stabilizing plate; and air outlet holes are formed in the upper ends of the left and right side walls of the casing. The factory purification ventilation system has the advantages that through the movable purification ventilation equipment, purification circulation treatment is performed in waste gas generating positions, the investment of the purification equipment is greatly reduced; the left air inlet fan can be selected to be switched on to start the fixed air suction mode, or the right air inlet fan can be selected to be switched on to start the air suction mode; and the applicability is high.