305 results about "Double filtration" patented technology

The invention relates to the technical field of machine tools, in particular to a numerically-controlled machine tool coolant filtering device which is characterized in that a coolant filtering box isfixedly connected onto a base through two supporting seats; a primary filtering assembly is slidably connected to the upper end of the coolant filtering box; a scraping plate is slidably connected onto a filtering plate sliding seat; two clamping parts are fixedly connected to the front and rear ends of the left end of the primary filtering assembly and connected to the front and rear ends of thescraping plate in a clamping manner; and a control assembly is rotationally connected to the upper end of the coolant filtering box. Through the primary filtering assembly and a secondary filtering assembly in the numerically-controlled machine tool coolant filtering device provided by the invention, a coolant can be subjected to double filtration; after being cooled, the coolant can be discharged for recycling, thereby improving the coolant recycling rate and bringing certain economic benefits; cuttings and solid particles in the coolant can be cooled, thereby protecting workers against accidental injuries caused by the high-temperature cuttings; and the secondary filtering assembly can be extracted so as to clear the cuttings and the solid particles.

The invention provides an intelligent terminal cloud management system. The system comprises a cloud server, at least one terminal and at least one management platform. The at least one management platform is developed based on an Android platform, and the management platforms and the terminals can achieve the needed functions through corresponding Android applications. The management platforms can be connected with the cloud server through a corresponding gateway according to a network which the management platforms have access to actually. By means of the intelligent terminal cloud management system, the applications of all the terminals can be installed and upgraded conveniently, so that version compatibility and synchronization are achieved; moreover, power consumption resource waste of the terminals is avoided through power consumption control, and the safety of data transmission in the entire Internet of things is guaranteed to a greater extent through bidirectional authentication of the cloud server and the management platforms, identity authentication to the terminals by the management platforms and double filtration of a data package by the cloud server and the management platforms; meanwhile, the function of comprehensively utilizing all available data in the Internet of things through the management platforms is achieved, and good convenience is achieved.

A double filtration sediment control device to improve sediment removal from stormwater. A sheet of filtering geotextile is sewn to form a sleeve and a leading flap. An elongated flat, flexible frame is bent longitudinally to form an arch that is inserted into the geotextile sleeve. After insertion, the frame expands against the sleeve to support the sleeve in an arched orientation with an uphill leg and a downhill leg. The outside of the uphill leg is a first filtering surface, and the inside of the downhill leg is a second filtering surface. The flap is covered with soil to direct water through the device, and the device is anchored with sod staples driven through the flap. The frame provides a height and functional rigidity to the assembly. The second filtering surface may be a finer filter than the first filtering surface.

The invention discloses a method and a device for preparing a pleurotus eryngii liquid strain. The method for preparing the liquid strain comprises the following step of: 1, preparing liquid strain culture medium from the following materials in percentage by weight: 15 to 25 percent of potato, 5 to 15 percent of wheat bran, 1 to 5 percent of brown sugar, 0.5 to 3 percent of glucose, 0.2 to 1.5 percent of peptone, 0.2 to 1.5 percent of potassium dihydrogen phosphate, 0.05 to 0.3 percent of magnesium sulfate, 0.05 to 0.3 percent of vitamin B, 0.01 to 0.05 percent of plant oil and the balance of water, wherein the pH value is 5.0 to 8.0. An air purification device provided by the invention is formed by arranging an oil-free air compressor at an outdoor front air supply end; a filter membrane with small aperture is selected; double filtration is performed on air by air intake and air outtake, and the air then is fed in an air storage tank and then fed in an indoor branch cylinder through a pipeline, passes through a reducing valve, is filtered and fed in each fermentation tank through a filter of the fermentation tank; in this way, the outdoor air is filtered for several time to become clean and aseptic fresh air which is fed in the fermentation tank; and thus the clean air required for fermentation culture of the liquid strain in the tank can be effectively ensured, and the preparation of the liquid strain is facilitated.

The invention discloses a double-filtration anti-blocking pulse bag dust collector, comprising a box body and a spray pipe; a perforated plate and a cage frame are fixedly connected in the box body; a plurality of electromagnetic valves are fixedly connected to the cage frame, a first filter bag and a second filter bag are fixedly connected between every electromagnetic vale and the perforated plate, the lower ends of both the first and second filter bags are fixedly connected with valve bodies of the electromagnetic valves, venturi tubes are penetratingly connected to the perforated plate, and the spray pipe is fixedly connected above the perforated plate in the box body; a vibrating motor is fixedly connected to each side of lower funnel structure of the box body, the funnel part in the box body is fixedly connected with a plurality of electric telescopic rods through a mounting frame, an intake pipe is fixedly connected with a plurality of steel rods through a circular frame, and the intake pipe is also fixedly sleeved with an electromagnetic heating sleeve; the double-filtration anti-blocking pulse bag dust collector provides secondary dust collection, the filter bags are high in carrying capacity, dust collection efficiency is effectively improved, and the double-filtration anti-blocking pulse bag dust collector runs stably and is suitable for collecting dust in various cold and hot waste gases.

The invention discloses a double-filtered chemical filter tank with an automatic multi-directional anti-blocking function. The double-filtered chemical filter tank comprises a tank body, a material feeding pipe and a regulating and controlling box, wherein the upper part of a side wall of the tank body is fixedly connected with the material feeding pipe; the lower part of the side wall of the tankbody is fixedly connected with the regulating and controlling box; a side wall, away from the regulating and controlling box, of the tank body is hinged with a rotating door; a plurality of highly-efficient filtration of chemical materials are realized through the combination of the regulating and controlling box, a coarse filter frame and a fine filter frame; at the same time, a first brush anda second brush move intermittently to fully and timely unblock the fine filter frame that is easy to be blocked; a turntable rotates to shake the coarse filter frame up and down, so that the coarse filtration is accelerated; a third gear drives an annular plate and the fine filter frame to rotate rapidly for secondary filtration, and slag is concentrated in a slag storage barrel due to the relatively high mass, so that the centralized processing of the slag is facilitated, high-efficiency filtration of the filter tank is ensured, and the blockage of the fine filter frame and influence on the filtration efficiency are effectively avoided.

The invention relates to a petroleum filtering device used for petroleum collection, and especially relates to a high-efficiency petroleum filtering device used for petroleum collection. The technical problem to be solved in the invention is to provide the high-efficiency petroleum filtering device used for petroleum collection, with the advantages of simplicity in operation, realization of double filtration of petroleum and good filtering effect in order to improve the quality of the petroleum. The high-efficiency petroleum filtering device used for petroleum collection comprises a baseboard, a left side plate, a collecting frame, a first petroleum outlet tube, a first valve and a fixed block; and the left side plate is arranged at the left side of the top of the baseboard in a bolt connection manner, and the lower portion of the right side surface of the left side plate is provided with the collecting frame in a bolt connection manner. Dual filtration of a filtering frame and a filter plate makes the petroleum filtering effect very good, and a first baffle plate and a second plate make an impurity baffle plate prevent impurities from falling into the collecting frame during the leftward and rightward movement of the filtering plate.

The invention discloses a roof rainwater collecting system, which comprises a roof, a rainwater collecting groove, a primary filtering device, a split-flow device, a reverse flushing filtering device and a rainwater collecting barrel, wherein the rainwater collecting groove is formed at the lower edge of the roof; the primary filtering device is arranged at the lower part of a water outlet opening of the rainwater collecting groove in a non-contact way, and can be used for intercepting sundries with large sizes to prevent a water passing pipeline from being blocked; an intercepting regulating rod of the split-flow device can intercept the rainwater from entering a regulating cavity so as to raise a floating ball valve; the early stage rainwater split-flow and the later stage pure water collection can be realized; the reverse flushing device is provided with a first filtering screen, a second filtering screen and a flushing device; the filtration on the collected rainwater can be realized; when pipeline accumulated water increase is caused by the blockage of the first filtering screen and the second filtering screen by filtering sundries, under the rainwater static pressure effect in the water passing pipeline, a piston is driven to move, a flushing outlet is opened; and the automatic flushing on the reverse flushing device can be realized. The roof rainwater collecting system has the dual filtering and early stage rainwater split-flow function; and the rainwater collection and utilization efficiency can be improved.

The invention discloses a method for producing a wire drawing woven bag by adopting a discarded plastic one-step method. PP and PE discarded plastics are classified, breaking, cleaning, rinsing and mixing are carried out, direct melting and plasticizing are carried out, a thin film is extruded from a die head after double filtration is carried out, water cooling is carried out to form membrane and the membrane is chopped into an ingot wire, the ingot wire is drawn into an ingot, and the ingot can be used by various plastic knitting machines. The original pelletizing and cooking production processes are eliminated, a rinsing automatic process is integrated, sewage is treated and the rinsing water is recycled, energy consumption required by a heating system and all the motive powers in the pelletizing and cooking production process is greatly saved, the production cost is low, and a hidden trouble in safety production in the industry is also eliminated; and meanwhile, the product quality achieves the national standard, and the quality and product quality of regenerated plastic are improved.

The invention discloses a self-washing centrifugal screen filter. The self-washing centrifugal screen filter comprises a rotational flow drum, a separation drum and a sand collector, wherein a water collecting cap is arranged at the upper part of the rotational flow drum, an air inlet and exhaust valve is arranged at a central position of the upper end of the water collecting cap, and a water outlet pipe is radially arranged at a lower-middle part position of the side wall of the water collecting cap; a water inlet pipe is arranged on the side wall of the rotational flow drum along the tangential direction of the side wall, a filter screen is arranged inside the rotational flow drum, and the filter screen is composed of a bottom round screen piece, a cylindrical screen piece at the upper part of the round screen piece and a circular ring screen piece at the upper part of the cylindrical screen piece; and the edge of the circular ring screen piece is clamped in a filter screen annular mounting groove of a flange between the water collecting cap and the rotational flow drum. The self-washing centrifugal screen filter is simple and compact in structure and stable in properties, adopts double filtration, namely centrifugal filtration and filter screen filtration, has functions of a self-washing filter screen, does not need to frequently clean and replace a filter screen and is small in water resistance and good in filtering effect, and a water dropper or nozzle can not be blocked.

The invention relates to the technical field of fluid machinery, and discloses a strong-effect filtering type centrifugal fan. The strong-effect filtering type centrifugal fan comprises a volute, an impeller assembly and a motor, the volute is internally provided with an air inlet cavity and an air duct with the inner end communicated with the air inlet cavity, the two ends of the impeller assembly are provided with air guiding covers, a motor positioning ring is arranged on the inner wall of the air inlet cavity, a plurality of connecting strips are arranged on the two sides of the motor positioning ring, the outer ends of the connecting strips are connected with the outer end of the air inlet cavity of the volute through bolts, a connecting ring is arranged on the outer side of the motor, a plurality of connecting lugs are arranged on the connecting ring, and the connecting lugs are connected with the motor positioning ring through bolts; the two ends of the air inlet cavity are provided with activated carbon filtering assemblies, wherein the activated carbon filtering assemblies comprise inner isolation supports and outer isolation supports, the inner sides of the inner isolation supports and the inner sides of the outer isolation supports are provided with activated carbon cloth, and activated carbon particles are used for filling between the two layers of the activated carbon cloth. the device has the advantages that the tail gas of the range hood can be subjected to double filtration, the filtering effect is good, and the overall performance is stable. The strong-effect filtering type centrifugal fan has the beneficial effects that tail gas of a range hood can undergo double filtration, the filtering effect is good, and the overall performance is stable.

The invention provides a novel self-expansion screen pipe, comprising a shape memory alloy slotted base pipe, a metal screen pipe, a water-soluble filler layer, a shape memory polymer layer and a water-soluble protective layer sequentially from inside to outside. The shape memory alloy slotted base pipe is made of shape memory alloy, contracts to a pre-expansion shape at high temperature and self-expands under temperature effect after being tripped in to a specified position; the shape memory polymer layer contracts to a pre-expansion state at high temperature and never changes in shape at normal temperature. Compared with the prior art, the novel self-expansion screen pipe has the advantages that the diameter is increased through the expansion pipe technology; multiple producing layers can be subjected to sand prevention treatment at a time; gravel filling is not required so that the influence of insufficient filling on sand prevention effect is avoided; fewer string trips-in are required so that operation cost is reduced; double filtration with the screen pipe and the shape memory polymer layer is achieved, improving the sand prevention effect; a well wall can be effectively supported so that wall collapse due to sand discharge is prevented.

The invention discloses a fine filter device of a high pressure back-flush rotary filter drum. The fine filter device comprises a shell, a filter drum, a sewage inlet pipe, a sewage discharge pipe, a back-flush water inlet pipe, a water outlet pipe and a high pressure fixed spray pipe, wherein the high pressure fixed spray pipe is arranged in the filter drum; one end of the water outlet pipe is connected with a water inlet with a filter screen; the end with the filter screen of the water inlet with the filter screen is positioned in the filter drum; one end of the filter drum is connected with the high pressure fixed spray pipe through a first bearing, and the other end of the filter drum is connected with the water inlet with the filter screen; one end of the water inlet with the filter screen is arranged on the shell through a second bearing, and the other end of the water inlet with the filter screen is connected with the high pressure fixed spray pipe through a third bearing; the top of the shell is provided with a motor; an output shaft of the motor is provided with a driving chain wheel; a driven chain wheel is arranged at a connecting end of the filter drum with the water outlet pipe; and the driving chain wheel is connected with the driven chain wheel through a chain. Double filtration is formed through the filter screen on the filter drum and the water inlet with the filter screen, so that the filtration accuracy of water is improved.

The invention discloses a device for drinking water treatment. The device comprises a water storage tank, a base, a high-density fiber layer, a high-density activated carbon layer and a membrane separation layer, wherein the water storage tank is positioned on the base; the high-density fiber layer, the high-density activated carbon layer and the membrane separation layer are arranged in the water storage tank from top to bottom. The device has the benefits that through integrating a composite filtering technology and a membrane treatment technology, an inseparable organic whole body which is efficiently treated under an synergistic effect is formed; a composite filtering layer is arranged inside the water treatment device in the water flow direction; under the double filtering action, a water purifying process in the water treatment device is divided into a plurality of purifying areas to form multiple stages of filtration; pollutants in water are filtered and removed level by level to realize the deep purification of the drinking water.

The invention discloses a combined cooking fume gas purifying system, and belongs to the field of air purification. The combined cooking fume gas purifying system comprises a static electricity cooking fume purifier, and is formed by the combination of a plurality of modules; the purification modules arranged sequentially from the cooking fume inlet to the cooking fume outlet in the system include a fireproof deoiling baffle, a static electricity cooking fume purifier, a photocatalytic mechanical filter and a draught fan component. Three purification modules are adopted for the system aiming at the cooking fume in a kitchen; a unique combined purification mode is applied; cooking fume is separated efficiently; dual-filtration is carried out, and then smell is adsorbed, so that the cooking fume in the kitchen is purified maximally.

The present invention relates to a kind of drinking water machine, and is especially one electrically heating and cooling drinking water machine with filter and constant water drainage device. It includes casing, intelligent control circuit, water heating tank, cooling inner tube, water inlet pipe and water outlet pipe; and features its double filter comprising active carbon filter and ceramic filter and water pressurizing and accumulating tank. Tap water is filtered by the active carbon filter and the ceramic filter successively before flowing into the water pressurizing and accumulating tank and water out of the water pressurizing and accumulating tank is supplied to the water heating tank and the cooling inner tube via the T-pipe. The present invention is safe, reliable, hygienic, convenient and power saving.

The invention relates to a method for preparing high-capacity cathode slurry for an automobile. The method comprises the steps of: (1) roasting carbon powder and an conductive additive in a vacuum oven; (2) adding 88-96% of carbon powder, 0.5-2% of conductive additive, 1-3% of CMC (Carboxymethylcellulose), 0.5-3% of SBR (Styrene Butadiene Rubber) and 2-5% of LA132 by weight percentage into water, vacuumizing and agitating for 6-10 hours in an agitator; and (3) adding 0.5-1% of isopropanol by weight percentage 1-2 hours before slurry discharge, and performing double filtration by a filter screen to obtain the cathode slurry. According to the method for preparing the high-capacity cathode slurry for the automobile provided by the invention, a CMC-SBR-LA132 system binder is used, advantages of conventional CMC-SBR system and SBR-LA132 system are considered, and the cathode slurry has binding, thickening and defoaming functions. The cathode slurry bubble is reduced effectively and the cathode slurry has a good application prospect.

Belonging to the field of environmental protection, the invention in particular relates to double-filtration exhaust gas purification equipment, which consists of an air inlet pipe, a deduster, an exhaust pipe and an exhaust chimney that are communicated in order. The deduster is internally provided with upper activated carbon filter plates and lower activated carbon filter plates, the upper activated carbon filter plates and the lower activated carbon filter plates are arranged staggeredly at an interval, the upper activated carbon filter plates are suspended on the upper end inner wall of the deduster, and the lower activated carbon filter plates are fixed on the lower end inner wall of the deduster. The windward sides of the upper activated carbon filter plates and the lower activated carbon filter plates are all equipped with a filtration grid plate. The deduster bottom is provided with a deslagging door. The exhaust pipe outer wall is equipped with a spray device. The invention aims to provide the double-filtration exhaust gas purification equipment with the advantages of simple manufacturing and installation, small floor space, economical efficiency and practicability. The double-filtration exhaust gas purification equipment is conducive to dispose poisonous gas and dust produced in a fire coal combustion process, effectively solves the waste gas pollution problem, and protects the atmospheric environment.

The invention discloses a membrane filter with double filtration, which belongs to the fields of environment-friendly water treatment technologies and membrane separation technologies. The membrane filter is particularly suitable for an immersed membrane bioreactor (MBR). The membrane filter with double filtration is characterized by consisting of a plurality of membrane filtering units, wherein a plurality of capillary membranes are wrapped and protected by virtue of a mesh filter sleeve. As each capillary membrane is provided with a protecting jacket, the problem that the root part of each capillary membrane is fragile is solved; due to being filtered by the mesh filter sleeve, fiber matters have no chance to contact and wind the capillary membranes; as the fiber matters outside membrane bundles are relatively easy to be removed though a mechanical method, the trouble of damaging the capillary membranes by the fiber matters does not need to be worried about; and as produced water is filtered through a filter cloth filter sleeve and the capillary membranes, the quality of the produced water is better ensured.

The invention belongs to the technical field of drinking water purification, and concretely relates to a surface type reverse osmosis membrane filter element. The filter element comprises a central tube and a filtering module; the bottom of the central tube is provided with a purified water outlet; the filtering module is located at the outer ring of the central tube, the filtering module is usedfor filtering water, and the filtering module comprises an inner filter membrane, an outer filter membrane, first rolling pillars, second rolling pillars and a sleeve; the inner filter membrane is located at the outer ring of the central tube, the inner filter membrane and the central tube are connected by a support, and a group of the first rolling pillars is uniformly distributed on the outer ring of the inner filter membrane; the outer filter membrane is located at the outer ring of the inner filter membrane, and a group of the second rolling pillars is connected to the inner ring of the outer filter membrane; and the second rolling pillars and the first rolling pillars are arranged in a staggered manner. The filter element has the advantages of simple structure, convenience in operation, improvement of the quality of purified water through double filtration of the inner filter membrane and the outer filter membrane in the filtering module, and cleaning of impurities accumulated onthe inner wall through squeezing and jittering the filter membranes by the first rolling pillars and the second rolling pillars.

The invention relates to a production technology of a 6-series alloy bar for anodic oxidation. The production technology of the 6-series alloy bar for anodic oxidation includes the following steps that (1) mixing is performed; (2) refining is performed; (3) blowing is performed, specifically, after blowing is performed on an alloy aluminum liquid, the liquid is left to stand at 730-750 DEG C; (4)online degassing is performed; (5) double filtration is performed; and (6) casting is performed, specifically, cooling water casting is performed after the alloy aluminum liquid passes through an oil-gas slip casting flow table. According to the production technology of the 6-series alloy bar for anodic oxidation, an advanced oil-gas slip casting production line in China at present is used as a core, the industrial pure aluminum liquid with the purity being 99.85% is used, methods of semi-continuous casting, in-furnace homogenization treatment and double-filtering equipment are adopted, the 6-series aluminum alloy bar product for anodic oxidation can be prepared finally, grain distribution in a cast bar is uniform, the content of aluminum alloy slag is low through high-magnification structure inspection, and segregation tumors, cold shut and other phenomena do not exist on the surface of the alloy bar.

The invention discloses a food additive detection device for solid food, and relates to the technical field of food detection equipment. The device comprises a mounting frame, a bottom box and a mixing funnel, the bottom box and the mixing funnel are fixedly connected to the middle of the mounting frame, and a spectrophotometer and a rotary servo motor are fixedly mounted at the bottom of the inner wall of the bottom box. According to the detection device, double filtration, namely centrifugal filtration and filter screen filtration can be carried out on crushed and mixed to-be-detected food;the food can be detected more accurately; therefore, the condition that a detection result is interfered by a large-volume detection product is well avoided; the detection precision is greatly improved, so that the accuracy of the detection result of the food additive is guaranteed, the purpose of quickly and efficiently detecting the additive in the food is achieved, automatic detection of the food additive is realized, a detection staff needs not to manually add a plurality of detection reagents into a cuvette, and the detection efficiency is greatly improved.

Automatic swimming pool cleaners and components thereof are described. The cleaners may provide dual filtration of debris suspended in water of pools as well as a fluid path allowing some water to by-pass one of the two filters. They also may include any of all components such as multi-section inlet tubes, Venturi jets, nozzles exhausting water onto rotatable vanes, brushes, downforce turbines, and mechanisms for adjusting water flow through thrust jets or sweep tails.

The invention discloses a double-filtration fault warning method for a data center monitoring system. The incidence relation of various fault states, various notification modes and multiple system administrators of fault warnings is combined, a double-filtration design method in which a resource monitoring module is used as the basis and a resource fault warning filter and a warning notification mode filter are further matched is adopted, and a double-filtration system which uses a notification processing engine as a connecting point is realized. The notification processing engine generates a warning notification, and then the notification is filtered by a three-dimensional notification strategy which is established by different warning levels, different warning modes and different types of administrators. Compared with the prior art, the double-filtration fault warning method for the data center monitoring system achieves the double-filtration system using the notification processing engine as the connecting point, the fault warning reasonability and accuracy of the monitoring system are greatly improved, the problems that warning is unreasonable, the notification cannot be accurately sent and the right distribution of the administrators is limited are solved, and practicability is high.

The invention discloses machine tool waste engine oil recovery equipment, which comprises a machine shell, wherein a heating cavity is formed in the upper end in the machine shell, a transmission cavity is formed in the right end in the machine shell, a transmission mechanism for providing power for the equipment is arranged in the transmission cavity, a stirring mechanism for melting waste engineoil is arranged in the heating cavity, and an impurity removing mechanism for purifying the engine oil is further arranged at the lower end in the machine shell. According to the invention, during working, water in waste engine oil can be removed, the solid impurities in the water-removed engine oil are automatically removed, the solid impurities are subjected to double filtering so as to substantially improve the purity of the treated engine oil, and the impurities can be collected in a centralized mode so as to facilitate late treatment.

The invention discloses a drilling fluid recycling method and a negative pressure vibrating screen. The drilling fluid recycling method comprises the following steps that an air compressor is started and continuously works to generate high-speed flowing air; an air pressure difference is formed between the upper part and the lower part of a screen mesh through a negative pressure suction cup mounted below the screen mesh of the vibrating screen, so that viscous drilling fluid is stored in a negative pressure storage tank through the screen mesh, and residues in the drilling fluid are saved; then drilling fluid is pressed into a drilling fluid storage tank through a one-way valve, the negative pressure storage tank is emptied, besides, a pressure difference opposite to a negative pressure state is formed on the upper surface and the lower surface of the screen mesh through the negative pressure suction cup mounted below the screen mesh of the vibrating screen, and residues adhering to the screen mesh are removed; and the negative pressure suction cup forms pulsating airflow with a certain frequency at the screen mesh of the vibrating screen, and double filtration of drilling fluid through vibration and negative pressure is achieved. The drilling fluid solid control efficiency can be improved, drilling fluid consumption can be reduced, the drilling fluid rock debris content can be reduced, drilling acceleration can be assisted, and the drilling equipment level can be improved.

The invention discloses a filter element of an automobile cabin filter. The filter element comprises a filter plate, a filter element and a retaining outer ring, wherein six grooves are formed in the retaining outer ring, and are symmetrically distributed relative to the central line of the retaining outer ring; and projections are spliced to the centers of the grooves, the projects and filter plates are fixedly connected, and the two filter plates are distributed on the upper and lower ends of the retaining outer ring, the filter element is arranged below a fixed plate, two ends of the filter element are fixed to the upper surface walls of the filter plates through bonding strips, and an aluminum strip is fixed at the center of the filter element. According to the filter element of the automobile cabin filter, the filter element and the filter plates are arranged on the equipment for double filtration, relatively large impurities in air are filtered by means of the filter plates, and the filter element filters small diameter impurities with peculiar smells in air, so that the filter element is clear in function, the service life of the equipment is prolonged, and the using economical benefit of the automobile is enhanced.

The invention relates to a drainage pipeline, and in particular to a building drainage system. A miniature hydroelectric generator is arranged in the pipeline to utilize kinetic energy produced by wastewater flow to drive the generator to rotate for electricity generation; and at the same time, a filtering net and a U-shape groove are arranged in the pipeline to conduct double filtration of the impurities in the wastewater, so as to avoid pipeline blockage and influence on normal working of the generator, and facilitate cleaning of precipitated impurities by property management personnel. The building drainage system provided by the invention uses wastewater flow for power generation, and saves a lot of resources while ensuring the smoothness of the pipeline, and is suitable for large popularization.

The invention relates to an air cleaner of a mini-tiller handle-type double-filtration gasoline (diesel) engine and belongs to the technical field of structures of air cleaners. The air cleaner comprises an air filter (1), an air guide tube (2) is arranged at the position of an air inlet of the air filter (1), the other end of the air guide tube (2) is divided into two branch tubes (4) through a tee joint (3), and the two branch tubes (4) are communicated with two armrest metal guide tubes (6) of a mini-tiller respectively. The air cleaner of the mini-tiller handle-type double-filtration gasoline (diesel) engine has the advantages that the structural design is reasonable, the blocking is not prone to occur, costs are low, and the usage is convenient.