53results about How to "Difficult to filter" patented technology

An interface apparatus for fan monitoring and control includes a current source amplifier that generates a programmable current in response to its input voltages. Associated with an output capacitor, which is able to reduce noise, the programmable current drives the fan at a desired speed. The rotating fan induces a ripple signal in the output capacitor, which is fed to a band-pass amplifier to produce a tachometer pulse. Through a buffer amplifier, an input control signal combined with a thermal sensor signal has direct control over the current source amplifier. Alternatively, a PWM circuit having a comparator, a ramp oscillator and the output of the buffer amplifier drives the current source amplifier in switching mode. Since the ramp oscillator can be synchronized by the input, both analog and pulse signals can function as the input control signals.

The invention discloses a UDP message-based IP path active measurement method. In the prior art, a detection message is so likely to be identified as a path measurement behavior or attack behavior and filtered that the integrity of path measurement is destructed. The method comprises: selecting a target port and a source port in a UDP message header according to a given detection target address D; filling the fields of the UDP message header and an IP message header according to the provisions of a protocol and sending the detection message: recording the number of the detection message and a corresponding process number or thread number in the detection sum field of the UDP header and the identifier field of the IP header, recording the detection of a UDP message in the data field of the UDP message and sending the detection message; and receiving a response message in a given time period and processing the response message according to the type of the response message, or waiting overtiming processing if the response message is not received in the given time period. The measurement method is used for resisting filtration in an IP network.

The present invention relates to a preparation method of anti-aging and spherical cerium oxide with a large specific surface area, and belongs to a material preparation technology. A Ce4+ solution is added to a reactor to be heated to 90 DEG C, a surfactant solution prepared by triethylenetetramine, alcohol, cetyl trimethyl ammonium bromide and deionized water is added into the heated Ce4+ solution, and then ammonia water is added to adjust the pH of the reaction system to 9 to 11. The system is subjected to aging reaction to obtain a gray precipitate which is extremely easily to be filtered. The filtered precipitate is washed with ethanol and deionized water, the washed precipitate is filtered, the filtered precipitate is dried at 80 DEG C to obtain an incompact yellow powder, and the incompact yellow powder is subjected to thermal insulation at 400 DEG C for 3 h to achieve a specific surface area of 120-180 m<2>/g, or subjected to aging at 800 DEG C for 3 h to achieve a specific surface area of 75-115 m<2>/g. The obtained anti-aging and spherical cerium oxide has a median particle size D50 of 7-15 [mu]m, is very good in powder flowability, and has a large specific surface area.

A filter device, particularly an air breather filter device for venting a fuel tank, includes a housing with a first port provided as an inlet in normal operation of the filter device and a second port provided as an outlet under normal operation of the filter device. The housing encloses at least one filter and an air passage extends from the first port to the second port passing through the filter. Inside the housing a baffle unit is arranged in the housing for covering the at least one first filter in relation to the second port, wherein the baffle unit is arranged to deflect a fluid flow entering the filter device through the second port.

The invention relates to the field of solid-liquid separation, in particular to a machine-woven industrial filter cloth of covered yarns and production and application thereof. The machine-woven industrial filter cloth is made of the covered yarns; each covered yarn is composed of a core yarn and an outer yarn. The covered yarns are creatively applied to the machine-woven industrial filter cloth in the field of solid-liquid separation, the size of the cloth is well stable, strength of the cloth is high, and residue adhesiveness thereof is good.

The invention relates to a pool without sinking of people during swimming. The pool without sinking of people during swimming is provided with a pool body. The pool body is divided into three sections. The lower section of the pool body is a water inlet section, and a water inlet hole is formed in the lower section of the pool body. The middle section of the pool body is an upward flow section. The flow direction of water in the upward flow section is upward. The upper section of the pool body is a backflow section, and a cover plate is further arranged above the backflow section. The outsideof the pool body is a downward flow section, and the flow direction of water in the downward flow section is downward. Drainage grooves are formed between the backflow section of the upper section ofthe pool body and the cover plate. The drainage grooves are used for backflow and are evenly distributed on the circumference of the backflow section. The drainage grooves are in a long-strip shape according to a drawing or the drainage grooves are not required, the water is allowed to overflow directly from the cover plate of the pool body. The drainage grooves are formed between the backflow section of the upper section of the pool body and the cover plate. A guide grid body is arranged on the upper section of the water inlet section, the guide grid body is composed of a plurality of parallel small holes, and the small holes are vertical. The water inlet hole of the lower section of the pool body is connected with a water outlet of a water pump, and a water inlet hole of the water pump is arranged outside the pool. A water pump seat is arranged on the lower section of the pool body, and the water pump is arranged on the water pump seat.

The invention relates to an automobile lamp, and particularly discloses an automobile lamp rear cover for quickly filtering fog. A gas travelling route is formed in the automobile lamp rear cover; theautomobile lamp rear cover comprises a rear cover shell (1) and an end cover of the rear cover (6) which is connected with the rear cover shell (1); a water vapour filtering device (2), a fog absorption device (3), a gas flow channel device (4) and a drying device (5) are arranged on from one side, far away from the end cover of the rear cover (6), on the gas travelling route in sequence; a labyrinth flow channel structure (43) which is used for extending the gas travelling route is formed in the inner cavity of the gas flow channel device (4). In addition, the invention also discloses an automobile lamp assembly and an automobile. The automobile lamp rear cover disclosed by the invention can effectively filtering the water vapour which enters the automobile lamp, so that the fog formation probability in the using process of the automobile lamp is reduced, the irradiating effect of the automobile lamp is improved, and the quality of the automobile lamp is improved.

The invention relates to filtering equipment, in particular to drilling mud filtering equipment for petroleum production. The drilling mud filtering equipment is time-saving, labor-saving, excellent in filtering effect, less prone to filtering out rock cuttings and free of waste. The drilling mud filtering equipment comprises a first mud tank, a discharging pipe, a valve, a second mud tank and anoblique plate, the discharging pipe is connected on the lower portion of the right side of the first mud tank and communicated in the first mud tank, the valve is arranged on the discharging pipe, andthe left side face outside the first mud tank is connected with the second mud tank which is communicated in the first mud tank. Mud can be further filtered through a secondary filtering device, so that filtering effect is good; through a turning device, artificial turning of a frame is not needed, so that time and labor are saved, filtering effect is excellent, less proneness to filtering out the rock cuttings is realized, and waste is avoided.

Belonging to the field of food, the invention relates to a chrysanthemum beverage and a preparation method thereof. The invention aims to solve the technical problem that existing chrysanthemum beverages are not suitable for diabetics. The chrysanthemum beverage is prepared by: decocting chrysanthemum morifolium by water, then adding fructooligosaccharide and potassium sorbate, conducting dissolving, uniform mixing, and volume setting, then passing the decocted solution through a filter membrane, and carrying out subpackaging and high-temperature sterilization. The chrysanthemum beverage provided by the invention has the effect of effectively assisting antihypertensive drugs in reducing the systolic pressure and diastolic pressure function of essential hypertension subjects, thus being suitable for diabetics.

The invention relates to the field of filtration separation equipment with a closed container filled with a filtration material, in particular to a self-cleaning spiral extrusion filter and a use method thereof. The self-cleaning spiral extrusion filter comprises a vertical cylinder (1) vertically arranged. The self-cleaning spiral extrusion filter is characterized by further comprising a vertical shaft (21), vertical spiral blades (22), a filter net (23) and a motor (3), wherein the vertical shaft (21) is vertically arranged in the vertical cylinder (1), and an output shaft of the motor (3) is connected with the vertical shaft (21) through a driving mechanism; the vertical spiral blades (22) are fixed to the vertical shaft (21), and the filter net (23) in a cylindrical shape is arranged outside the vertical spiral blades (22) in a sleeving mode. The use method of the self-cleaning spiral extrusion filter is characterized by comprising the following steps of a, start and b, filtration. The self-cleaning spiral extrusion filter and the use method have the advantages of being high in filtration efficiency, little in material loss, long in service life, low in production cost and friendly to the environment.

The invention provides a wax mold stone inlaying device which comprises a positioning assembly, a directional screening mechanism, a conveying rail, a spiral conveying assembly and an abutting assembly. The directional screening mechanism is connected with the rack and is used for screening gems with downward pavilions; the conveying rail is fixedly connected with the directional screening mechanism so as to receive the gems screened out by the directional screening mechanism, and a discharging pipe is arranged at the discharging end of the conveying rail; the spiral conveying assembly comprises a spiral conveying piece and a conveying driving piece, the spiral conveying piece is rotationally connected with the rack, a guide channel is formed in the spiral conveying piece, and the conveying driving piece is connected with the spiral conveying piece so as to drive the spiral conveying piece to rotate intermittently, and then gems on the conveying rail are conveyed to the discharging pipe; the abutting assembly comprises an abutting driving part and an inlaying shaft, the abutting driving part is arranged on the rack and connected with the inlaying shaft, and the abutting driving part can drive the inlaying shaft to sequentially penetrate through the guide channel and the discharging pipe so as to inlay the gemstone on the wax mold. The inlaying precision can be improved.