97results about How to "Constant air pressure" patented technology

The invention relates to a flap aerated biological filter and a wastewater treatment method thereof. The flap aerated biological filter comprises a filter, water distribution pipes and gas distribution piped, wherein a water collecting channel with a rectangular section is arranged below the middle part of the bottom plate of the filter; the filter and the water collecting channel are divided into two layers by a water collecting channel partition; rows of water distribution pipes and gas distribution lateral pipes are arranged on the water collecting channel partition; a filtering material layer is paved on the water collecting partition; a flap valve is installed on one side of the filter wall; a backwashing water discharge channel is arranged outside the flap valve; a water inflow channel and an overflowing weir are arranged above the flap valve; the water distribution pipes and the gas distribution lateral pipes are buried in the filtering material layer, and are communicated withwater/gas distribution combined vertical pipes; and the filter wall at one side of the water collecting channel is communicated with outflow pipes of an aeration amount control valve and a backwashing gas control valve, an after-filtration water outflow pipe and a backwashing water inflow pipe. By the flap aerated biological filter, two independent aeration and backwashing gas distribution systems of a traditional biological filter are replaced, the investment is reduced, the construction difficulty is reduced and the use utilization of equipment is improved; and the flap aerated biological filter can be widely applied to wastewater treatment process of a biological filter.

The invention relates to a multiple son-tire self-complementing explosion proof tire which consists of vehicle tires, airplane tires and jinrick-shaw tires. The explosion proof tire comprises a hub and an outer cover and an inner cover in the outer cover is composed of two or more son-tires. The son-tires are filled with gas, and no valve is arranged and the son-tires are of a siphon clip wedge shape. When the son-tires are of a syphon clip wedge shape, a wedge shape parcel is used for making up wedge shape space generated by the syphon and the hub is provided with a standby inner cover and a valve.

The invention discloses a yarn tension device for a warp knitting machine. The yarn tension device comprises a cylinder fixation seat, a cylinder, a cylinder pull head, a steel rope, a yarn through rod, rotary wheels, an air supply tube, a pressure gauge, a valve, an air storage tank, a tension spring, a yarn guide cap, a yarn and the like, wherein the rotary wheels are installed at the both ends of the yarn through rod, the tension spring is uniformly installed at the middle, and the yarn guide cap is clamped at the tail end of the tension spring; the yarn is woven by a machine table round the yarn guide cap; one end of the cylinder is located on the fixation seat, and the cylinder pull head at the other end is provided with the steel rope; the other end of the steel rope is fixed on the rotary wheel; in this way, the yarn through rod is tensioned as long as the cylinder works, thus tensioning the yarn guide cap; the air storage tank is installed on the machine table of the warp knitting machine, and an air compressor in a workshop is used for supplying air to the air storage tank; air in the air storage tank enters the cylinder through the air supply tube; a pressure in the cylinder is adjusted by a pressure adjusting valve, and the pressure is adjusted according to the tension of the yarn; the pressure display gauge is capable of displaying the air pressure during the working of the cylinder, thus facilitating operation.

The invention discloses a laboratory multi-section ventilation energy-saving control system, and relates to the technical field of laboratory ventilation equipment. The laboratory multi-section ventilation energy-saving control system comprises a frequency conversion draught fan, a centralizing box and a plurality of ventilation cabinets connected with the centralizing box. Air valves are arrangedon ventilation branches from the centralizing box to the ventilation cabinets. The ventilation cabinets are connected with a face air speed monitoring and control system. The face air speed monitoring and control system comprises face air speed sensors arranged in the ventilation cabinets and a variable air volume controller. The variable air volume controller is connected with the frequency conversion draught fan and measures the aperture of the ventilation cabinets in real time. Meanwhile, the face air speed sensors measure the face air speed in real time and convert the face air speed intovoltage signals transmitted to the variable air volume controller. The variable air volume controller compares the face air speed actual value and the set value, if the face air speed is not in the set value range, the variable air volume controller outputs control signals to the frequency conversion draught fan, and the frequency conversion draught fan receives the control signals and adjusts the ventilation air volume. The laboratory multi-section ventilation energy-saving control system capable of conducting intelligent frequency conversion according to the actual air utilization volume and achieving energy saving is provided.

A decompression valve incorporated in a gas decompression device valve of fuel cell system is divided into a measuring room and a back pressure room by a diaphragm. A valve seat and a valve body adjoining to the measuring room are arranged on the decompression valve. When gas pressure works on the diaphragm, the diaphragm is displaced to move in a direction for making the valve body closer to the valve seat. Pressure control springs arranged on the decompression valve urge the diaphragm in a direction to make the valve body separate from the valve seat. The diaphragm, pressure control springs and the like allow hydrogen gas to pass the valve seat, whereby hydrogen gas from an outlet is decompressed. The gas decompression further comprises a pressure switch valve which adjusts urging force of the pressure control spring by back pressure, a flow rate sensor which detects gas flow rate at the outlet, and an electronic control unit which controls the pressure switch valve so as to adjust back pressure depending on gas flow rate.

The present invention provides a stage apparatus wherein an object is disposed in an atmosphere with a gas pressure lower than atmospheric pressure, and the object can be driven with high accuracy. The stage apparatus that drives a reticle comprises: a vacuum chamber, which forms a space and has an opening; an integrated coarse and fine motion table, which has an electrostatic chuck that holds the object, that, when driven, moves the electrostatic chuck inside the space; a counter mass, which is disposed so that it covers the opening, that is capable of moving because of the reaction force produced when the integrated coarse and fine motion table is driven; and a vacuum cover, which forms a space that houses the counter mass; wherein the space and the space are set to prescribed gas pressures.

A self-repairing anti-exploding tyre features that a single-layer or double-layer cavity is arranged on the inner surface of a tyre and divided into multiple isolated spaces, and the coagulating reaction liquid or expanding substance is loaded in each space. Its self-repairing method is also disclosed.

The invention provides a self-closed sucker vacuum cup. The self-closed sucker vacuum cup comprises a cup body, an end socket and an upper cover. The end socket is assembled on the upper portion of the cup body, and a sucker penetrating through the end socket is assembled on the end socket. The sucker comprises an upper section and a lower section, a hinge column vertically penetrating through theend socket is assembled on the end socket, the hinge column and the end socket are rotationally assembled, a communicating block enabling the upper section and the lower section of the sucker to be communicated is assembled on the lower portion of the hinge column, a control rod for pushing the hinge column and the communicating block is assembled on the upper portion of the hinge column, when the control rod is pushed, the communicating block can rotate relative to the sucker, and the upper section of the sucker is directly communicated with the upper portion of an inner cavity of the cup body. Due to the design of the communicating block, the sucker can serve as a water outflow pipe at the same time, in the ventilating process of the air outflow pipe, the sucker can serve as an elasticpart for supporting the upper cover, and the cup is more convenient to use.

The invention relates to the technical field of test devices, in particular to a constant-temperature and constant-humidity test box. The constant-temperature and constant-humidity test box comprises a barrel-shaped test chamber arranged in a vertical direction, a base, a heating device, a refrigerating device, a humidifying device and a balance weight piston, and the base is provided with a support used for installing a sample; a test space is formed in the test cabin and is positioned between the counterweight piston and the base; the humidifying device is used for adding wet air into the test space, the humidifying device comprises an atomizing device and a compressor, the atomizing device atomizes water in the water tank to generate water vapor, and the compressor presses the water vapor into the test space; and the test box further comprises a circulating fan, a honeycomb rotating wheel, a temperature sensor, a humidity sensor and a controller. According to the constant-temperature and constant-humidity test box, after water vapor is condensed and liquefied, due to the fact that the balance weight piston can freely slide under the action of gravity, the air pressure in the test chamber is kept constant, and the air pressure in the test chamber can be kept stable without an air pressure sensor.

The invention discloses a novel air compressor, and relates to the field of air compressors. The novel air compressor comprises an air storage tank, a pair of mounting bases arranged on the air storage tank, a compression host and a motor, wherein the compression host and the motor are arranged on the pair of the mounting bases respectively, the side wall of the air storage tank is provided with an air inlet and an air outlet, the interior of the air storage tank is in sliding connection with a boosting plate with the outer wall abutting against the inner wall of the air storage tank, and theinner wall of the end, deviating from the air inlet, of the air storage tank is provided with a plurality of boosting springs fixed on the side wall of the boosting plate. The novel air compressor hasthe following advantages and effects that when the air storage tank is exhausted, the boosting springs are utilized to push the boosting plate to drive gas to move, the storage space of compressed gas is greatly reduced, the pressure intensity of the compressed gas is increased, the exhausted gas is always in a constant high pressure state, the effect of keeping the air pressure of the output gasconstant is achieved, and the effect of high reliability is achieved.

The invention belongs to the technical field of power equipment, and particularly relates to an improved stay insulator which comprises an umbrella skirt and a fixing fitting. The fixing fitting comprises two mounting plates, incomplete gears, racks and internal threaded cylinders are mounted on the mounting plates, and threaded rods are rotatably mounted in the internal threaded cylinders; mounting cylinders are fixedly connected to the incomplete gears, a plurality of threaded holes are evenly formed in the mounting cylinders in the circumferential direction of the mounting cylinders, threaded columns in the radial direction of the mounting cylinders are mounted in the threaded holes in a threaded fit mode, and arc-shaped plates are rotatably mounted at the inner ends of the threaded columns; rubber strips matched with the surfaces of stay wires are fixedly arranged on the inner surfaces of the arc-shaped plates, and guide rods which are parallel to the threaded columns and in sliding fit with the mounting cylinders are fixedly mounted on the outer surfaces of the arc-shaped plates. According to the improved stay wire insulator, the included angle between the stay wires at the two ends of an umbrella skirt can be adjusted, the stay wires can be limited after being fixed, friction between the stay wires and the arc-shaped plates during shaking is avoided, and it can be guaranteed that the tension progress of the stay wires is kept consistent all the time.

The invention belongs to the technical field of renewable energy sources, and in particular relates to a methane pressure stabilizing device and a manufacturing process thereof. The methane pressure stabilizing device is characterized by utilizing a principle of separate storage in two pools, i.e. one material fermentation device and a methane storage and pressure stabilizing device are constructed; when methane in the pools is generated continuously and the pressure of the pool bodies is increased, the methane continuously flows to a methane storage tank (2) through a methane guide pipe (8); the more the methane is generated, the higher the pressure of the methane storage tank (2) becomes; when the methane stored in the methane storage tank (2) is too much or the amount of the methane used by farmers is too small, excessive methane is drained through a pressure relief valve (3), and the pressure of the methane supplied to the farmers is unchanged; and a one-way valve (6) is installed on the methane guide pipe (8), when the methane generation amount of a fermentation pool (7) is less, the one-way valve (6) can ensure the pressure in the methane storage tank (2) and prevent methane in the methane storage tank (2) from flowing back to the fermentation pool (7), and the pressure of the methane supplied to the farmers is unchanged.

The invention discloses a W-N nano composite-structured coating for miniature end milling cutters and a preparation method thereof, and relates to the field of material surface working. The componentsof the coating comprise 80-100at.% of tungsten and 0-20at.% of nitrogen in atomic percent. The preparation method comprises the following steps: firstly, performing ultrasonic cleaning on a hard alloy miniature end milling cutter, then performing plasma etching on the surface of the hard alloy miniature end milling cutter by an electric arc enhancement type glow discharge technique; and introducing N2 and Ar into a chamber, under the condition of certain substrate negative bias, deposition temperature, sputtering target power, and the like, performing magnetron sputtering coating to obtain the W-N nano composite-structured coating. The preparation method adopts the magnetron sputtering technique to perform coating treatment on a substrate and deposit the W-N nano composite-structured coating, and the coating is well bonded with the cutter substrate, realizes high surface hardness and good chip removal performance of the miniature end milling cutter, and can effectively improve the service life and processing quality of the cutter.

The invention provides a pig manure sewage treatment device and relates to the technical field of sewage treatment. The pig manure sewage treatment device is mainly used for treating a lot of pig manure sewage which is continuously produced, and comprises a collection anaerobic tank, a primary filtering anaerobic tank, a secondary filtering anaerobic tank, an aerobic tank, a primary sedimentationtank and a secondary sedimentation tank, which are arranged in sequence; a dry and wet separator is arranged between the collection anaerobic tank and the primary filtering anaerobic tank; an aerationdevice is arranged in the aerobic tank. The invention further provides a pig manure sewage treatment method; the pig manure sewage treatment method comprises the following steps: (1) culturing decomposing bacteria; (2) collecting the pig manure sewage and carrying out primary anaerobic treatment; (3) filtering and precipitating and carrying out anaerobic treatment; (4) carrying out aerobic treatment; (5) carrying out precipitation and anaerobic treatment again; (6) carrying out disinfection and sterilization treatment. The sewage treatment device provided by the invention has the advantages of simple structure, low production cost, capability of being continuously operated, high treatment efficiency and great sewage treatment amount. The sewage treatment method provided by the invention adopts a method combining physical precipitation and filtering, and biodegradation to treat the sewage, and is green and environmentally friendly.

The invention provides a powder conveying device and method and additive manufacturing equipment, and relates to the technical field of additive manufacturing. The powder conveying device and the method and the additive manufacturing equipment aim at solving the problem that the quality of parts is reduced due to the fact that air influences powder in the powder adding process of an existing powder adding assembly. The powder conveying device comprises a powder adding assembly, a powder feeding assembly and a pressure balancing assembly, wherein the powder adding assembly is used for containing powder. When the powder conveying device is in a non-working state, the powder adding assembly, the powder feeding assembly and the pressure balancing assembly are independent of one another; the powder adding assembly is in a closed state when containing the powder; and when the powder conveying device is in a working state, the powder adding assembly communicates with the powder feeding assembly, and the pressure balancing assembly communicates with the powder adding assembly and the powder feeding assembly and is used for balancing the internal pressure of the powder adding assembly and the powder feeding assembly. The invention further provides the powder conveying method applied to the powder conveying device and additive manufacturing equipment comprising the powder conveying device.

The invention provides fermentation equipment for fruit wine. The fermentation equipment includes a fermentation tank, a separation device, an adjustment device and a gas balance device; the separation device includes a motor, a stirring paddle and a separation cylinder; the adjustment device includes an air cylinder and a baffle, the air cylinder is arranged below the fermentation tank, the baffle is connected to the output end of the air cylinder, and the baffle is arranged at the bottom of the separation cylinder to seal a bottom outlet of the separation cylinder; and the gas balancing device includes a connecting pipe and a balancing mechanism, the balancing mechanism includes a gas discharge box, a gas discharge plate and a gas discharge component are arranged in the gas discharge box, the gas discharge plate divides the gas discharge box into two independent compartments in the horizontal direction, and the two independent compartments are a compartment I and a compartment II from the left to the right. The fermentation device can separate peel residues and the fruit wine in the fermentation process, can effectively reduce the loss of the fruit wine, ensures that the air pressure in the tank is constant, realizes the automatic exhaust of the fermentation tank, and increases the fermentation effect of the fruit wine.

The invention relates to a high pressure powder feeder unit. The high pressure powder feeder unit comprises a driving unit, a powder storing unit and a powder disc unit arranged successively. An output end of the driving unit is connected to a driving shaft extending into the powder storing unit. The powder disc unit comprises an upper powder disc and a lower powder disc. The upper powder disc comprises a disc body, wherein an air inlet is formed in the center of the disc body, an air overflowing breadth is arranged along the outer edge of the air inlet, the lower powder disc is a cover body of a ring concave part structure and comprises a fixed protrusion arranged at the center, and a powder disc rotating shaft mounting hole is formed in the center of the fixed protrusion. The high pressure powder feeder unit combines the driving unit, the powder storing unit and the powder disc unit together. By improving the structures of the driving unit, the powder storing unit and the powder discunit, the whole powder feeding unit is extremely good in sealing property, is suitable for a high pressure condition and is enough to meet a production demand of production. The unit can be suitablefor being used in a condition not enough in pressure, can meet the demand of cold spraying, thermal spraying and laser cladding techniques, is wide in application and has a good market prospect.