142results about How to "Unobstructed exhaust" patented technology

The invention provides a method for quickly starting an anaerobic ammonia oxidation reactor. A small amount of anaerobic ammonia oxidation sludge subjected to enrichment culture successfully is regularly added into a reactor for starting an anaerobic ammonia oxidation process by using non-anaerobic ammonia oxidation sludge (such as nitrification sludge, denitrification sludge, methane-producing sludge and the like) to provide certain growth factors for the reactor, so that the starting condition of the anaerobic ammonia oxidation process is improved, and a part of bacterium sources can be increased to accelerate the enrichment of anaerobic ammonia oxidation bacteria in the sludge in the reactor; and substrate concentration and hydraulic retention time are timely adjusted on the basis to avoid substrate lack and accelerate the growth of the anaerobic ammonia oxidation bacteria and the process of granulating the sludge, so that the starting time of the anaerobic ammonia oxidation reactor is greatly shortened, and the popularization and application of the anaerobic ammonia oxidation process are facilitated.

The invention relates to a micro needle chip and a preparation method thereof. The preparation method of the micro needle chip comprises steps: flow injection liquids are injected into a female die, the female die is provided with a plurality of cavities which are adapted to the shapes of needle bodies of micro needle chips to form a cavity array, a plurality of injection inlets are arranged on a side surface of the female die, a plurality of exhaust ports are arranged on the other one surface of the female die to form an exhaust surface, a breathable film is covered on the exhaust surface of the female die, gas penetrates the breathable film and liquid is retained in the cavities when injecting, and the flow injection liquids are demolded after being solidified to form the micro needle chip. Because the exhaust ports and the breathable film are matched, the liquid can be hold back and the gas is discharged at the same time, the micro injection effect is excellent. The preparation method of the micro needle chip does not need processes such as centrifugation which are difficult to achieve in industrial manufacture and the like in technological process, also does not need to use technological means such as high pressure or high temperature with high industrialization cost and the like, has the advantages of simple and convenient operation and low cost, and is suitable for industrialization promotion and use.

The invention provides a method for casting aluminum piston with an insert ring and a cooling coil pipe, comprising steps as follows: (1) preparing aluminum alloy for piston; (2) melting; (3) mould setting of the cooling coil pipe; (4) mould casting of insert ring; (5) mould closing and pouring; (6) mould opening and heat treatment for taking out the casting, processing low temperature melting treatment and ageing heat treatment to obtain the piston blank; (7) post-treatment for carrying out mechanical processing and surface treatment on the piston blank to obtain the aluminum piston finished product. The invention also discloses a method for casting aluminum piston with an insert ring and a cooling coil pipe. Compared with the prior art, the advantages of the invention are as follows: the piston body has compact structure, and the combination between the wear resistant insert ring and the piston body through ultrasonic detection is good, and the position of the cooling coil pipe is precise and the anti-stretching intensity is high.

The invention relates to a casting method of a main reducer housing. The casting method includes: a precoated sand core forming process, a smelting ball iron process and a casting process, the precoated sand core forming process includes core-making of precoated sand, coated sand type assembly and sand-type steel shot filling; the smelting ball iron process includes electric-furnace smelting and charging of molten iron and treatment; the casting method is characterized by including casting, unboxing, de-gating, one-step shot blasting, grinding, secondary shot blasting and detecting. With the method, exhaust smoothness is guaranteed, generation of hole defects in the casting is avoided from the sand core exhaust process, sand hole and pore defective reject rate is controlled within 1%, shrinkage or porosity defect is avoided, the casting is stable in size and high in surface smoothness, the yield is higher as compared with that with a traditional casting method of the main reducer housing, the production process is easier to control, and production competitiveness has higher advantages.

The invention belongs to the field of storage battery manufacturing technology, and particularly relates to a storage battery grid mold release agent and a preparation method thereof. The storage battery grid mold release agent is prepared from the following raw materials in parts by weight: 0.3-0.7 part of bone glue, 0.4-0.8 part of polyethylene, 0.4-0.8 part of kieselguhr, 0.2-0.5 part of glass water, 0.3-0.7 part of aluminum dihydrogen phosphate, 2-4 parts of cork powder of 200-300 meshes, 2-4 parts of cork powder of 700-800 meshes, and 88.5-94.4 parts of water. The storage battery grid mold release agent is easy to bond, high-temperature-resistant and smooth to exhaust; the prepared grid has fewer pores, thus being easily formed in casting.

The invention relates to a die used for manufacturing a microneedle chip and a manufacturing method for the microneedle chip and belongs to the technical field of transdermal drug delivery preparations. The die comprises a female die and a breathable film. The female die is provided with a plurality of cavities which are matched with a needle body of the microneedle chip in shape and arranged in an array manner. Each cavity is provided with a pouring inlet and an exhaust opening. Each pouring inlet is opened in the surface of one side of the female die and is located at the needle base end of the corresponding cavity. Each exhaust opening is opened in the surface of the other side of the female die and is located at the needle point end of the corresponding cavity. An exhaust face is formed on the surface, provided with the multiple exhaust openings, of the female die. The exhaust face is covered with the breathable film, and the breathable film is used for preventing liquid from permeating the exhaust face and enabling gas to permeate the exhaust face. By means of the die, gas is exhausted while liquid is intercepted, and a better micro-pouring effect is achieved. When the die is used for manufacturing the microneedle chip, the centrifuging process and the like which are hard to achieve in industrial production do not need to be conducted, and industrial production of the high-quality microneedle chip becomes possible.

The invention relates to a sand core exhaust method of a complicated casting, belonging to the casting field. A vent pipe is buried in the heads of an air flue sand core and a water flue sand core during modeling and mould assembling so that the sand cores can be communicated with the external atmosphere through the vent pipe; and the vent pipe as a cast iron casting is made of a steel pipe or as an aluminum alloy casting is made of a glass pipe. The exhaust problem of the sand cores wrapped by metal liquid can be solved by mounting the sand cores on the vent pipe for exhaust; and the invention has the advantages of simplicity and convenience for operation, good exhaust effect, great reduction for generation of air holes in the casting, reduction of casting reject ratio, low price and easiness for purchasing by using the steel pipe or the glass pipe as the vent pipe.

The invention discloses a release agent for battery grid casting and a preparation method thereof. The release agent comprises the following raw materials in parts by weight: 0.2-0.6 parts of polytetrafluoroethylene, 0.1-0.3 parts of aluminum dihydrogen phosphate, cork 1-5 parts of powder, 0.2-0.6 parts of sodium silicate, 0.6-1.5 parts of glass fiber powder, 0.1-0.6 parts of attapulgite, 0.6-2.5 parts of nano-silicon dioxide, 3-8 parts of modified aluminum tripolyphosphate, Adhesive 0.1-0.5 parts, stabilizer 0.2-0.8 parts, deionized water 90-120 parts. The preparation method adopts conventional mixing, heating and stirring. The mold release agent of the present invention has good sprayability, adhesion, temperature resistance, small surface tension, high compressive strength, smooth exhaust, can significantly reduce the phenomenon of air holes and cracks in the grid, and can also reduce the number of spray molds , improve production efficiency and save costs.

A water-cooling-type tail gas cleanup device of an explosion-proof diesel engine is provided with a front flange, a rear flange, a shell and a DOC core. The front flange is fixed to the front end of a main body shell, a thermal-insulation flange is arranged in the front flange, the rear half portion of the front flange is connected with a flow guide cover, the rear of the flow guide cover goes deep into the main body shell, a front space ring and a rear space ring are arranged on the inner wall of the middle of the main body shell, the DOC core is clamped between the front space ring and the rear space ring, an annular area outside the cylindrical surface of the DOC core between the front space ring and the rear space ring is an air isolation area, an inner shell of a lower shell extends upwards to form a flow guide pipe, an air outlet hole is formed in the cylindrical surface, facing the wall of a hemispheroid cavity, of the flow guide pipe, and the rear flange is installed at the lower end of the lower shell. Through the water-cooling-type tail gas cleanup device, not only is the surface temperature of the diesel engine made to reach the standards, but also high conversion efficiency of the DOC core can be guaranteed.

The invention discloses a casting method of a high-powered engine box casting. The casting method comprises the steps of preparing moulding sand, performing modeling and core making to obtain a sand mould, preparing pouring iron liquid, taking pig iron, foundry returns and waste steel as raw materials to be fed into a smelting furnace to be smelted, carrying out in-package inoculation and spheroidization on the smelted iron liquid, carrying out stream inoculation before tapping, then carrying out tapping, pouring the iron liquid into the sand mould, carrying out stream inoculation, adopting acold iron riser process for feeding and temperature control, forming a casting after pouring is finished, and carrying out treatment on the formed casting. The obtained casting is good in quality, andquality problems of core clamping, shrinkage, cracks and the like are not prone to happening.

The invention relates to the field of medical appliances, particularly a collecting device for collecting the body fluid. The fluid extractor for closed body fluid retention devices comprises an annular side wall and a channel assembly, wherein the annular side wall forms a channel; the channel assembly is arranged in the channel and positioned on the lower part of the channel; the channel assembly and annular side wall form a split fit; the channel assembly is provided with a through hole; the upper part of the channel is used for collecting the fluid; and the lower part of the channel is matched and connected with the channel assembly. The fluid extractor is capable of lowering the cost and enhancing the production efficiency; and when the excess fluid is poured out of the fluid extractor, the fluid in the test tube can be prevented from being poured out from the diversion channel or exhaust channel.

The invention discloses a switchable spiral-flow type exhaust gas spark arrester for an automotive vehicle, which relates to an engine exhaust gas processing device for extinguishing spark and combines spiral-flow centrifugal seperation trapping and filter screen barrier seperation trapping. A rotary type spiral-flow valve core and a diversion cover are assembled into an organic whole body of thespark arrestor, wherein the rotary type spiral-flow valve core is opened, an air current chamber is formed to discharge exhaust gas smoothly, and when the rotary type spiral-flow valve core is closed, a diversion chamber and a spiral-flow chamber are formed to carry out multistage composite seperation trapping extinguishment combining spiral-flow centrifugal seperation trapping and filter screen barrier seperation trapping on spark particles. The switchable spiral-flow type exhausting spark arrester is suitable for meeting two special requirements that after the spark arrester is arranged once for all, the valve core is opened when the spark arrester operates in a safety environment and the valve core is closed when the spark arrester operates in a flammable and explosive environment, thereby the complexly repeated dismantling is eliminated, and the transportation efficiency is improved.

The invention discloses a dust-proof filter mask which comprises a mask body and fixing bands. The mask body and the fixing bands are connected. The mask body comprises a breathable outer layer, a filter layer and an inner layer, the breathable outer layer, the filter layer and the inner layer are connected in sequence from outside to inside, the inner layer comprises an edge part and a middle part which are connected with each other, the middle part comprises an upper flat plate body, the upper flat plate body corresponds to the position of the nostrils, a nostril air inlet one-way valve is arranged on the upper portion of the upper flat plate body, and a nostril air outlet one-way valve is arranged on the lower portion of the upper flat plate body. The nostril air inlet one-way valve comprises a nostril air inlet valve groove and an air inlet rectangular hole which are matched with each other, the air inlet rectangular hole is covered with a nostril air inlet valve sheet, the nostril air outlet one-way valve comprises an air outlet valve groove and an air outlet rectangular hole, the air outlet rectangular hole is covered with a nostril air outlet valve sheet, and the air outlet valve sheet is connected with the air outlet valve groove in the left side or the right side of the air outlet rectangular hole. The dust-proof filter mask is low in inhalation and exhalation resistance and suitable for being used by a wearer requiring the mask with a plurality of layers and the large inhalation resistance of the mask, and guarantees the body health of a user.

The invention relates to a vehicle-mounted oil-gas separator, and especially relates to an oil pump vehicle evacuation oil-gas separator. The oil-gas separator comprises a shell, an oil gas entrance channel arranged at the bottom of the shell, and an exhaust channel arranged at the top of the shell, the oil gas entrance channel and the exhaust channel are respectively communicated with the inner cavity of the shell, and a floating ball is arranged in the inner cavity of the shell; an exhaust valve is fixed at the top of the floating ball, and comprises a main valve and a guiding valve; the valve core of the main valve is coupled with the valve port at the top of the shell to make the floating ball float up and down to drive the valve core to open or close the valve port in order to realize the communication or closure between the exhaust channel and the inner cavity of the shell; and the balance valve core of the guiding valve is fixed in the inner cavity of the body of the guiding valve, the piston of the guiding valve is fixed at the top of the valve core, and a separation board is sleeved outside the piston to form a reverse thrust cavity between the piston and the separation board. The oil pump vehicle evacuation oil-gas separator having the above structure has the advantages of thorough exhaust, increase of the oil-gas separation efficiency, and reduction of the use cost.

The invention provides a novel four-stroke four-cylinder layered dual-vortex combustion energy-saving internal combustion engine with a new gas distribution mechanism. In the internal combustion engine, four cylinder nozzle gaskets (14) and four small cylinder heads (13) with the new gas distribution mechanisms are arranged on four cylinders (28) of the conventional four-stroke vertical four-cylinder double overhead camshaft gasoline engine, and four small cylinders (37) are arranged inversely; two ports (35) are arranged in the front of the wall of each small cylinder (37); gas enters and is exhausted by up and down sliding of a small piston (39); and when big and small pistons (32, 45, 48, 52, 39) apply work simultaneously, gas exhaust is to push each small piston (39) and intake and exhaust turbines (66, 69, 73, 77) to apply work. The internal combustion engine has the advantages of simple structure, good lubricating condition, stable work, realizes that fuel vortex performs layered dual-vortex combustion in hot air interlayer, thereby having larger high-power output, saving fuel by about 50 percent, and reducing emission by 85 percent.

The invention relates to a vehicle exhaust pipe facilitating internal cleaning for energy conservation and emission reduction. The vehicle exhaust pipe convenient to internal cleaning for energy conservation and emission reduction comprises a main body and baffles, interface grooves are connected to the left side of a main body frame, the inner wall inside the main body and theinner wallsinside theinterface grooves are in close fit, clamping plates are installed on the left side inside the main body in the up-down direction, the main body and the clamping plates are in flexible connection, connecting columns are arranged at the top ends of the clamping plates, and sliding grooves are fixed to the right sides of the clampingplates. The vehicle exhaust pipe facilitating internal cleaning forenergy conservation and emission reduction has the beneficial effects that clamping plates can be clamped in the main body by manually moving the connecting columns, the interface grooves can be fixed to the main body, the interface grooves and the an exhaust pipe can be mounted in the main body through the connecting columns and the clamping plates, thus dust between the exhaust pipe and the interface grooves can be cleared by manually moving the connecting columns and the clamping plates, exhaust particulate matter can be prevented from being clamped between the exhaust pipe and the interfacegrooves, and thus the particulate matter of the vehicle exhaust pipe can be cleared.

The invention relates to the technical field of air exhaust, in particular to a wind-powered exhaust system. The invention solves the problem that the prior exhaust system can not achieve on-time and overall exhaust and ventilation by providing a wind-powered exhaust system capable of preventing exhausted air from being recharged. The wind-powered exhaust system comprises a fixed air passage, an exhaust fan and air outlet, wherein an upper end of the fixed air passage is connected with a rotary air passage, and an air door is arranged at the air outlet. The wind-powered exhaust system has the advantages of no secondary pollution, environmental protection, simple maintenance and reduced labor cost, economization and practicality, effective and complete discharge of dirt air in the air passage, prevention of air-flow recharge, and ensured smooth air discharge and freshness of air.

The invention relates to a vacuum pump with an auxiliary exhausting mechanism. The vacuum pump comprises an oil tank, a pump body arranged in the oil tank and an oil-gas separator disposed on one sideof the oil tank; the pump body comprises a first exhausting opening formed in the top of the pump body; the oil-gas separator comprises a shell and an exhausting filter element which is fixed into the shell; a second exhausting opening is formed in the shell; a passing opening which is in butt joint with an inlet of the exhausting filter element is formed in one side, close to the shell, of the oil tank and located above the first exhausting opening; the auxiliary exhausting mechanism which communicates with the interior of the shell is disposed on the oil tank and comprises a flow guiding wall which protrudes inwards from the inner wall of the oil tank, and an exhausting cavity is formed between the inner wall of the oil tank and the flow guiding wall; and a third exhausting opening which communicates with the exhausting cavity is formed in the outer wall of the oil tank. The vacuum pump is good in oil-gas separation effect, and the mounting position selectivity of externally-connected exhausting pipes is diversified.