8results about How to "Increase the differential pressure" patented technology

The invention discloses an atmosphere sintering furnace and a degreasing sintering method, and relates to the technical field of sintering equipment. The atmosphere sintering furnace comprises a furnace body, a negative pressure device, a blower device and an oxygen circulation system; a first air outlet of the furnace body is connected and communicated with an air inlet of the negative pressure device, and a first air inlet of the furnace body is connected and communicated with an air outlet of the blower device; the oxygen circulating system comprises an oxygen cooling device, an oxygen purifying device, a pressurizing device and a pure oxygen storage tank which are connected and communicated in sequence; a second gas outlet of the furnace body is connected and communicated with a gas inlet of the oxygen cooling device, and the second gas outlet of the furnace body is connected and communicated with a gas outlet of the pure oxygen storage tank; electric control valves are arranged in all the air outlets and all the air inlets, and all the electric control valves are connected with the control system in an electric control mode. During degreasing, the inside of the furnace is pumped to set negative pressure, exhaust of waste gas generated by a binder in a blank is accelerated through cooperation with the blower device, oxygen circulation is achieved during sintering, and oxygen waste is avoided.

The application provides an oxygen-enriched combustion heating system and a pipe diameter design method thereof, and relates to the technical field of heating furnace combustion. The system comprises a heating furnace, a mixing pipeline and an ignition head. The input end of the mixing pipeline is connected with the oxygen-enriched air, the output end of the mixing pipeline is communicated with the input end of the ignition head, the output end of the ignition head penetrates through the furnace wall of the heating furnace and is communicated with the inside of the heating furnace, the mixing pipeline comprises a straight pipe part and a variable diameter part, the variable diameter part is located between the two straight pipe parts and is communicated with the two straight pipe parts, the variable diameter part comprises a variable small part, a thin pipe part and a variable large part in sequence along the gas flow direction, the variable small part gradually decreases in diameter along the gas flow direction, the thin pipe part and the variable small part have the same diameter at the smallest end, one end of the thin pipe part away from the variable small part is communicated with the variable large part, the variable large part gradually increases in diameter, the middle part of the thin pipe part is communicated with a gas supply pipeline, and the combustible gas is filled in the gas supply pipeline. The system can uniformly mix the oxygen-enriched air and the combustible gas, so that the combustion efficiency and quality can be improved.

The present application relates to the technical field of metal casting, and particularly discloses a core making machine, which is provided with at least two regulating systems in the circumferential direction of the side wall of a core box. During sand shooting, the exhaust adjusting branch of the regulating system controls the exhaust amount during sand shooting to avoid excessive pressure drop loss, and the negative pressure adjusting branch adjusts the vacuum degree in the cavity to increase the pressure difference between the region and other regions, improve the flowability of the sand, and facilitate compacting of the sand, thereby achieving good core making effect. During solidification and blowing, the blowing mechanism can blow triethylamine gas into the cavity through the top and side of the core box, achieve the best solidification and air intake combination, increase the air intake area, shorten the solidification time, improve the solidification efficiency, and increase the opening of the exhaust adjusting branch to increase the exhaust amount of the corresponding region and ensure smooth air intake. The present application also provides a sand shooting and solidification process control method applied to the core making machine.

The application provides a sewage treatment equipment with intelligent dosing and chlorination, and relates to the technical field of sewage treatment.The sewage treatment equipment with intelligent dosing and chlorination is installed on a main pipeline through a metering pump, an electromagnetic flowmeter is installed on the upstream of the main pipeline, and an exhaust part and a full-flow part are sequentially connected in the water flow direction on the upstream of the main pipeline;the upstream of the exhaust part is connected to the main pipeline, the exhaust part is connected to the full-flow part, and the downstream of the full-flow part is connected to the electromagnetic flowmeter;the exhaust part is designed as a transverse Venturi tube, multiple gas collection cabins are uniformly arranged on the throat of the exhaust part, the inner diameter of the gas collection cabin is larger than that of the throat, the bubbles in the fluid are extracted and gathered through the low pressure formed by the position of the throat, and an exhaust valve is connected to the top end of the gas collection cabin;the full-flow part is arranged as a U-shaped tube with low upstream and high downstream, the U-shaped opening formed by the full-flow part is upward, a liquid seal is formed in the full-flow part to realize stable liquid level, buffer pressure fluctuation, and ensure that the downstream fluid forms a full-pipe state.

This application provides a wafer adsorption carrier, comprising: a first carrier body, the first carrier body including a sealing portion disposed circumferentially and a plurality of independently disposed grooves, the sealing portion being located radially outside the plurality of grooves, the plurality of grooves being uniformly distributed circumferentially on the first carrier body; wherein each groove includes a radially extending first groove and a circumferentially extending second groove, the first groove and the second groove being interconnected; and a second carrier body, the second carrier body being disposed below the first carrier body, the second carrier body including a first air channel, the plurality of grooves of the first carrier body having first suction holes at their radial ends, the plurality of first suction holes being respectively connected to the first air channel. The wafer adsorption carrier of this application can stably adsorb wafers.

The utility model discloses an energy-saving fluid motor resistant to high pressure and pressure pulsation, and relates to the technical field of hydraulic motors, the energy-saving fluid motor comprises a motor body, cup-shaped blades, an output wheel shaft and a shock wave recoverer; the periphery of the output wheel shaft is connected with a plurality of cup-shaped blades; the motor body is further provided with an oil inlet channel, an oil outlet channel and a shock wave channel. The large pulse flows through a shock wave recoverer at the bottom of the shock wave channel, is boosted and stabilized and then enters a flow-aiding channel and a braking channel on the two sides; a flow-aiding control valve is connected in the flow-aiding channel, and a brake control valve is connected in the brake channel; when the flow-aiding control valve is opened, the cup-shaped blade drives the output wheel shaft to rotate under the impact of incoming flow in the oil inlet channel and the flow-aiding channel; when the brake control valve is opened, the brake channel conveys the pulsating flow subjected to pressure boosting and pressure stabilizing into the cup-shaped blades, rotation of the cup-shaped blades is hindered, and the output wheel shaft can achieve flexible semi-brake under the action of opposite torque.

This utility model discloses a hydraulically retractable retrieval cylinder, comprising: an upper connector, a guide sleeve, a connecting cylinder, an elastic component, a slip, a piston rod, a piston, a plug, an adjusting shim, and several sealing rings. A flow guide hole is provided on the piston rod, positioned outside the piston's sealing ring when the elastic component is in its initial position; and inside the piston's sealing ring when the elastic component is in a compressed state. During fish retrieval, regardless of the fish's shape, upon retrieval, the flow guide hole is blocked, causing pressure buildup. This results in a significant increase in pump pressure, allowing for accurate determination of fish retrieval.

The utility model provides a kind of continuous sewage silicon dioxide flocculation recovery device, it is related to water treatment technical field, including expansion tank, the middle part of expansion tank is provided with partition baffle, the partition baffle is divided into flash chamber and flocculation chamber in expansion tank, the side wall middle part of flash chamber is connected with water inlet, the water inlet is connected with shower head assembly inside, the top of flash chamber is provided with plate heat exchanger, flocculation tank is fixedly installed in flocculation chamber, several aluminum base electrode plates are installed in flocculation tank, driving shaft is rotatably connected in the middle part of flocculation tank, driving motor is fixed in the top of flocculation tank, the output end of driving motor is connected in driving shaft top, several stirring scrapers are installed on driving shaft.The utility model is in by being arranged cooling section in expansion tank, the wastewater that enters into flocculation tank is kept in suitable flocculation temperature range, avoid the corrosion of high temperature to aluminum base electrode plate.