386results about How to "Good filtering effect" patented technology

The invention discloses a hybrid noise filtering method for removing Gaussian noises and impulsive noises. The method comprises: for hybrid noises of Gaussian noise and impulsive noises in a pantograph image, the impulsive noises are suppressed by an advanced boundary discriminative noise detection (ABDND) algorithm including noise pixel detection, noise pixel verification and noise pixel filtering; for the image after suppression on the impulsive noises, pixel points are processed by using a sliding window, all points in the window are ranked based on gray values, maximum-value and minimum-value points are removed, weight distribution is carried out on the rest pixel points and weighted calculation is carried out, wherein a calculation result is used as an output gray value of the central point of the filtered window to replace the original gray value of the point; and the two kinds of algorithms are repeated to carry out progressive filtering, thereby filtering the hybrid noises in the pantograph image. The method having advantages of simple principle and good filter effect has the great significance in digital image processing.

The invention discloses a mixed induction type active electric power filter system. The mixed induction type active electric power filter system comprises a rectifier transformer, a filtering branch, a rectifier and the other filtering branch, wherein the other filtering branch comprises three passive filters and a voltage source inverter, the passive filters are connected to the voltage source inverter, the primary side of the rectifier transformer is connected to a three-phase power grid through connecting impedor, an epitaxy winding of the secondary side of the rectifier transformer is connected with the rectifier, and the passive filters are connected to three junction points between a delta winding and the epitaxy winding of the secondary side of the rectifier transformer in parallel respectively. According to the mixed induction type active electric power filter system, influence of frequency fluctuation of the power grid side and the high-capacity nonlinear load side on electric power filtering performance is eliminated; meanwhile, the problems that serious harmonic pollution, high additional loss of a master device, high vibration and noise, low system power factor and low system operation efficiency are caused by harmonic waves and idle work to an industrial power distribution and consumption system are effectively solved on the premise that electric power quality on the power grid side meets the national standard of China.

The invention discloses a filtering tank capable of being easily cleaned and replacing filtering materials. The filtering tank comprises a tank body, as well as a water inlet pipe and a water outlet pipe which are communicated with the inner part of the tank body, wherein the tank body is composed of an upper tank body and a lower tank body which are detachably connected; a sealing part is arranged on the connection part of the upper tank body and the lower tank body; the water inlet pipe is located on the lower part of the lower tank body and the water outlet pipe is located on the upper part of the upper tank body; the lower tank body is internally provided with a filler layer and a filtering net in sequence from top to bottom; the filtering net is located above the water inlet pipe; a dreg discharging opening is formed in the bottom of the tank body; valves are arranged on the water inlet pipe, the water outlet pipe and the dreg discharging opening. According to the filtering tank capable of being easily cleaned and replacing the filtering materials, liquid enters the tank body from the water inlet pipe and sequentially passes through the filtering net and the filler layer to be discharged from the water outlet pipe; the liquid is doubly filtered through the filtering net and the filler layer and the filtering effect is good; the tank body is composed of the upper tank body and the lower tank body which are detachably connected and the inner part of the tank body is convenient to detach and clean; the filler layer is also convenient to replace.

The invention relates to a biphase digital phase-locking amplifier (as shown in chart 1) and a digital domain synchronous phase-locking algorithm of the biphase digital phase-locking amplifier. The biphase digital phase-locking amplifier can be used for detecting weak current signals, and realize the functions of automatic filtering tracking and synchronous phase-locking. The biphase digital phase-locking amplifier can solve the problems that the volume of the existing phase-locking amplifier is large, the temperature excursion exists, and the speed is slow when the existing phase-locking amplifier is connected with a computer to carry out automatic measurement and control. The biphase digital phase-locking amplifier has the technical characteristics that the weak current signals pass through a 9-step RLC (radio link control) mixed type high-pass filter by a precise I / V conversion circuit, and is then connected with two low-noise instrument amplifiers, the connecting modes of which are different; the rear ends of the instrument amplifiers are respectively connected with an 8-step RLC mixed type high-pass filter, and a differential signal is formed by signals output by two low-pass filters. Meanwhile, reference signals pass through a 90-degree phase shifter of a phase-locking loop to output two TTL square waves, the phase difference of two phases of which is 90 degrees. Signals of three paths are collected by a data acquisition card, and are then transmitted to a PC (personal computer) machine. The biphase digital domain synchronous phase-locking algorithm (as shown in chart 2) provided by the invention is applied on the PC machine to carry out signal processing and filtering.

The invention is a series-parallel isolated passive power filter, belonging to the field of electric energy quality controller of power distribution system, comprising first capacitor, second capacitor, first reactor, second reactor, and third reactor, where the first capacitor and the first reactor form first resonant circuit connected between power supply and load, a third resonant branch circuit is connected in parallel on the load side and the second capacitor and second reactor are connected in parallel to compose second resonant branch circuit which is connected in series with the third reactor to compose the third resonant branch circuit. The load-side closed circuit of harmonic waves on power supply side is isolated; the second resonant branch circuit is infinite impedance to base wave, increasing load power factor; the third resonant branch circuit is zero impedance to the lowest-order harmonic wave and extremely low impedance to other harmonic waves.

A double tuned filter based on a controlled reactor is composed of capacitor C1, controlled reactor L1, capacitor C2, reactor L2, a double tuned filter and a controlled reactor control circuit, among which, the parallel branches of capacitor C1, controlled reactor L1, reactor Lo, capacitor C2 and rector L2 are orderly serial, the double tuned filter is parallel to the system side. This invention alters the output reacting value of the reactor by altering the DC control voltage of the controlled reactor, therefore, the filter parameter can be changed according to the variance of the system parameter to enable the filter to resonate continuously and keep a good filter result.

The present invention relates to a double-direction two-stage composite filter mechanism, belonging to the field of environment-protecting technology. Said invention includes bottom plate, two two-position three-way electromagnetic valves, two groups of two-stage composite filters, pressure difference sensor and control unit. Said invention adopts unique two-stage composite filter integrated optimized design to make filtering accuracy of two filtering elements obtain optimum matching and obvious filtering effect, and can prolong the service life of said filtering element. At the same time, said invention adopts PLC to receive the signal of pressure difference sensor to automatically control two-position three-way electromagnetic valves so as to implement that when one worked one-way two-stage composite filter is blocked, another one-way two-stage composite filter can be used so as to raise the stability of system.

The invention discloses a filtering module inhibiting common mode noise and differential mode noise, comprising a first-level filtering module and a second-level filtering module. On the input end ofa common mode inductance (T1), which is near the power supply, a parallel branch composed of a disparaging resistance (R1) and a differential mode inductance (Cx) is connected between an anode and a cathode, and the other end is grounded by Y capacitance (Cy1) and capacitance (Cy2); and one end of a filtering inductance (T2) is connected with the output end of a direct-current power supply, and the other end is connected with a positive wire and a negative wire of the first-level filtering module. The above filtering module adopts the form of two-pole filtering circuit to increase the width ofthe effective filtering frequency band, lower volume and lower cost, filtering effect is favourable and the invention has the function of bidirectional filtering.

AU-shaped slot type artificial surface plasmonband elimination filter belongs to a multiband band elimination filter. The band elimination filter comprises a flexible dielectric substrate, a periodic metal optical grating, a U-shaped slot, a coplanar waveguide and a coupled structure, wherein the periodic metal optical grating is printed on the flexible dielectric substrate; the periodic metal optical grating is connected with the coupled structure and the coplanar waveguide; the periodic metal optical grating is combined with the U-shaped slot; the U-shaped slot represents that a metal film is not printed. The U-shaped slot type artificial surface plasmonband elimination filter has the advantages that 1, the periodicity of the U-shaped slot is selected as 1,2 and 3, band elimination filtering of one-wave band, two-wave band and three-wave band of a microwave band can be realized; 2, the structure is simple, the manufacturing is convenient, and the periodic metal optical grating structure has strong constraint on an electromagnetic field; 3, the structure of combining the periodic metal optical grating with the U-shaped slot is smaller in size and flexible, and can be applied to a microwave integration circuit with a compact size and a special function; 4, the metal optical grating structure can be applied to microwave, millimeter wave and terahertz frequency band through changing the basic parameters.

The sprayer includes one spray gun and one paint tank. The spray gun includes an sucking pipe, one gas filling pipe and one nozzle connected to the paint tank. The paint tank includes one tank and one filtering net, which is set inside the tank to separate the inside into two, one upper and one lower, parts. The tank is communicated with atmosphere, and the lower part is communicated with the sucking pipe and the gas filling pipe through pipeline with valves for controlling the opening and closing of the sucking pipe and the gas filling pipe separately. The sprayer has high filtering speed, high filtering effect and high spraying effect.

The invention discloses an energy enhancing steering acid liquid system, which comprises 615 parts of hydrochloric acid, 10 to 20 parts of corrosion inhibitors, 30 to 50 parts of steering agents, 10 to 20 parts of foam boosters and 10 to 20 parts of iron ion stabilizing agents. The system has the advantages that liquid has better automatic steering low-seepage storage layers, the goals of uniformly distributing acid and reforming the storage layers with poor storage seepage conditions are reached, simultaneously, the static liquid post pressure of liquid in a well tube is also reduced, and the liquid return and discharge capability after the construction is improved.

The invention relates to a horizontal indoor air purifier for photocatalytic oxidation, comprising a shell with a rectangular section; the shell is internally divided into a pressure-balancing chamber, a photocatalytic reaction chamber and an adsorption chamber in turn; wherein, the front of the pressure-balancing chamber is provided with an air inlet arranged at the front end of the shell and the back thereof is provided with a filter layer with the functions of pressure balancing and filtering; the photocatalytic reaction chamber is internally provided with a photocatalytic UV lamp; the front and / or back of the photocatalytic UV lamp is provided with a plurality of layers of photocatalyst filter screens; the adsorption chamber is internally provided with an adsorption layer; an air outlet is arranged on the top of the shell; the multi-level filter layer is formed by multi-layer tough and fine filter cloths; the photocatalyst filter screens are coated with nano-sized titania photocatalysts; activated carbon fiber bulks are preferably chosen as adsorbing materials. The air purifier features simple structure and convenient adaptation, very high purifying rate of volatile organic gas and is mainly applicable to indoor air pollution control.

The invention discloses a cutting fluid filtering device for a numerically-controlled machine tool. The cutting fluid filtering device for the numerically-controlled machine tool comprises an installing frame. The top of the left side of the inner wall of the installing frame is fixedly connected with a waste liquid box. The top of the waste liquid box is fixedly connected with a stirring motor. Through mutual cooperation of the waste liquid box, the stirring motor, a stirring shaft, a stirring part, a waste liquid pump, a waste liquid sucking pipe, a waste liquid outlet pipe, a filtering head, a filtering box, a filter, a filtering layer, an adsorption motor, an adsorption shaft, an adsorption part, a spraying box, an adsorption layer and a spraying pump, the filtering effect of the cutting fluid filtering device for the numerically-controlled machine tool is better, scrap iron and scum mixed in cutting fluid in the workpiece machining process of the numerically-controlled machine tool can be filtered and separated in time, impurity residues in the cutting fluid are effectively filtered out, and the phenomenon of deterioration of the cutting fluid caused by accumulation of too many impurities is prevented. Therefore, the secondary use performance of the cutting fluid is improved, and a workpiece and a tool are protected.

The invention relates to a rare earth macadam screening device and particularly relates to a rare earth macadam screening device for recovering rare earth wastes. The technical problem to be solved by the invention is to provide a rare earth macadam screening device for recovering rare earth wastes, and the rare earth macadam screening device is good in screening effect, high in screening speed, capable of adjusting the charging flow of a charging hopper, high in utilization ratio and capable of reducing economic loss and saving resources. In order to solve the technical problem, the invention provides such a rare earth macadam screening device for recovering rare earth wastes; the rare earth macadam screening device comprises a bottom plate, a screening barrel, a side plate, a vertical moving device, a first supporting rod, a first charging hopper, a box door, a first connecting rod, a slide block, a second connecting rod, a U-shaped magnet and the like; and the middle of the top of the bottom plate is provided with the screening barrel. According to the rare earth macadam screening device for recovering rare earth wastes, provided by the invention, the rare earth wastes in an iron screening plate are screened by rotating the iron screening plate.

The invention discloses an optical filter. The optical filter comprises a first lens, a second lens, a parallel detection assembly and an actuator. The first lens and the second lens are oppositely arranged in a separated mode, and the two opposite surfaces of the first lens and the second lens are both provided with highly reflective coating layers. The parallel detection assembly is used for detecting whether or not the two highly reflective coating layers are parallel. The actuator is used for driving the first lens to move oppositely to the second lens to change the size of the gap between the first lens and the second lens, and further used for driving the first lens or the second lens to move in order to make the two highly reflective coating layers parallel to each other when the highly reflective coating layers are not parallel. The invention further discloses a lens module and an imaging module. According to the optical filter, the camera lens module and the imaging module, when the parallel detection assembly detects that the two highly reflective coating layers are not parallel, the actuator can drive the first lens or the second lens to move to make the two highly-reflective coating layers parallel and ensure that the optical filter can have a great optical filtering effect.

The invention discloses a high attenuation microminiaturte common mode transmission electromagnetic interference active filter, which includes ring high-frequency current-transformer, wherein three windings twine round the mutual-inductor; the coiling directions of three windings are the same; two windings connect the alternating current power lead-in end; another end connects the carry-in terminal of operational amplifier; the export of operational amplifier feedbacks signal to noise source device by two high-pressure capacitances and electric resistances. The filter has simple and reasonable structure, which has strong noise attenuation ability and good low-frequency filtering feature.

The invention discloses an active carbon filter which comprises a barrel and a bracket, wherein a water inlet is formed in the upper end of the barrel; an air inlet is formed in one side of the water inlet, and a water outlet is formed in the lower end; the barrel is fixed on the bracket; the interior of the barrel is provided with a first filter layer and a second filter layer which are same in structure from top to bottom, and both the first filter layer and the second filter layer comprise baffle plates and active carbon layers; both the first filter layer and the second filter layer are obliquely arranged in the barrel; the first filter layer and the second filter layer are provided with material inlets on higher positions and are provided with material outlets on lower positions; and a push plate is arranged above each material inlet. To change the active carbon, the gate of the material inlet is opened, the to-be-changed active carbon is pushed out of the material outlet by virtue of the push plate, new active carbon is added from the material inlet and the active carbon is uniformly spread by virtue of the push plate; and the active carbon filter is simple in structure, convenient and rapid to change the active carbon, time-saving and labor-saving, sufficient in filtration and high in production efficiency.

The present invention relates to the electric energy transformation technology field, in particular to a voltage drop detection method suitable for a power grid voltage large harmonic content. The method comprises the steps of real-timely detecting a power grid voltage, calculating a positive sequence module value eP and a negative sequence module value eN of the power grid voltage, and carrying out the steady state judgment according to a calculation result; real-timely detecting the power grid voltage, calculating the voltage components e alpha and e beta of the power grid voltage in an alpha-beta stationary reference frame, carrying out the instant judgment according to the calculation result. When the instant judgment is used to limit an instant overcurrent, and the steady state judgment is used to determine a reactive current, the instant judgment pays attention to the rapidity, and the steady state judgment pays attention to the stability and accuracy. The two methods are combined to use, and make up the insufficiency mutually, thereby guaranteeing the accuracy and the stability of a judgment result.

The invention discloses a compact type RO (reverse osmosis) water purifier filter element. The compact type RO water purifier filter element comprises a filter flask body and a filter flask cap, wherein a composite filter element is arranged in the filter flask body, and a raw water inlet, a concentrated water outlet and a pure water outlet are formed in the filter flask body; the composite filter element comprises an RO membrane filter element or a nanofiltration membrane filter element, a front filter element coaxial with the RO membrane filter element or the nanofiltration membrane filter element is arranged outside the RO membrane filter element or the nanofiltration membrane filter element, a rear filter element accommodating cavity is formed in an upper filter element cap, a rear filter element is accommodated in the rear filter element accommodating cavity, and the pure water outlet communicated with the rear filter element is formed in the filter flask body. According to the compact type RO water purifier filter element, the front filter element, the rear filter element as well as the RO membrane filter element or the nanofiltration membrane filter element are integrated in the filter flask body, so that the number of the filter elements can be reduced, the filter effect is good, the space occupied by the whole machine is reduced, meanwhile, the door-to-door replacement frequency of the filter elements by service staff can be reduced, and the maintenance cost is reduced.

The invention discloses an aggregate screening device for buildings. The aggregate screening device comprises a base and a screening box, wherein a plurality of iron blocks are arranged on the upper side of the base; a spring is arranged on the upper side of each of the iron blocks; an electromagnet is connected to the upper end of each of the springs; a support platform is arranged on the upper sides of the electromagnets; a sliding rail is arranged on the upper side of the support platform; support plates are arranged at the lower end of the screening box symmetrically; the lower ends of thesupport plates are connected with the sliding rail; a motor is arranged at the right end of the upper side of the support platform; a rotating disc is arranged at the output end of the motor; a rotating shaft is arranged on the periphery of the front side of the rotating disc; a connecting seat is arranged on the right side of the support plate on the right side; a connecting rod is arranged between the connecting seat and the rotating shaft; a dust collection box is arranged at the right part of the upper end of the screening box; a fan is arranged at the upper end of the dust collection box; a dust collection pipe is arranged at the output end of the fan; and a dust collection cover is arranged at one end of the dust collection pipe. The aggregate screening device for buildings has thebenefits of being simple in structure, convenient to use, good in screening effect, long in service life, good in dust collection effect, and energy-saving and environment-friendly.

The invention belongs to the field of swimming pool cleaning, and particularly relates to an automatic swimming pool cleaning machine with a filtering system capable of being cleaned easily. The automatic cleaning machine is composed of a non-power walking wheel, a lower cleaning machine shell, a rigid plane filtering net, impeller water power assemblies, an upper cleaning machine shell and an assembly lock catch, wherein the impeller water power assemblies are arranged at the two ends of a horizontal double-stretching-shaft motor respectively. When the motor rotates forwards, an impeller on one side is meshed with a clutch to rotate along with the motor in the same direction, and an impeller on the other side is not meshed with a corresponding clutch and does not rotate. Dirty water with dirt passes through a water inlet in the bottom of the lower cleaning machine shell to flow into the lower cleaning machine shell through pumping of the rotation impeller. The water inlet is provided with an inwards-opening type one-way valve, the dirty water can only flow into the lower cleaning machine shell but cannot flow out. The dirt is blocked and left in the lower cleaning machine shell through the rigid plane filtering net. The automatic swimming pool cleaning machine with the filtering system capable of being cleaned easily is simple in structure, easy to dismount and mount and convenient to clean.

The invention provides a composite type air filter screen and a preparation method thereof. The composite type air filter screen includes a primary-efficiency filter screen, a particulate filter screen and a smell filter screen; the primary-efficiency filter screen, the particulate filter screen and the smell filter screen are sequentially connected to form the composite type air filter screen; the composite type air filter screen is provided with a lifetime indicating device. The composite type air filter screen allows the primary-efficiency filter screen, the particulate filter screen and the smell filter screen to be composited and superimposed to form a composite structure with three-layer filtration, and thus the filter effect is significant; moreover, the composite type air filter screen also is provided with the lifetime indicating device, so that the purification effect and the lifetime state of the composite type filter screen can be reflected in real time, a user can determine whether the filter screen needs to be replaced according to needs, and the use effect and user experience are ensured. The preparation method of the composite type air filter screen has the advantages of simple and fast process, and convenience for mass production.

The invention discloses a processing method for implementation of capacitive touchpad high-resolution output on a low-end single-chip microcomputer. The low-end single-chip microcomputer comprises a master control single-chip microcomputer module MCU (micro control unit), a self-checking capacitive sensing module and a capacitive touchpad. The master control single-chip microcomputer module controls the self-checking capacitive sensing module to obtain source data acquired by the self-checking capacitive sensing module from the capacitive touchpad, then the source data are subjected to touch position computing by the master control single-chip microcomputer module to obtain an original coordinate of a touch point, and the coordinate position of a highly-optimized program can be obtained by optimizing computation processing. The invention further provides a capacitive touch control device and a remote control using the capacitive touch control device. Electronic devices of the low-end single-chip microcomputer are combined with the capacitive touchpad, computing capacity of the low-end single-chip microcomputer is fully used, data processing efficiency is improved, and accordingly capacitive touchpad high-resolution output on the low-end single-chip microcomputer can be implemented.

The invention discloses a common mode filter for inhibiting conducted electromagnetic interference. At least three live wire jacks are connected in series through leads to form a first live wire jack row; at least three live wire jacks are connected in series through leads to form a second live wire jack row; a first inductor is arranged between the live wire jack on the first live wire jack row load side and the live wire jack on the second live wire jack row power grid side; at least three neutral wire jacks are connected in series through leads to form a first neutral wire jack row; at least three neutral wire jacks are connected in series through leads to form a second neutral wire jack row; a second inductor is arranged between the live wire jack on the first neutral wire jack row load side and the live wire jack on the second neutral wire jack row power grid side; and at least three ground wire jacks are connected in series through leads to form a ground wire jack row. Aiming at conducted electromagnetic interference common mode noise caused by an unknown noise source, the common mode filter avoids the problems of circuit board damage caused by repeatedly welding a circuit board, poor filter effect and the like.

The present invention belongs to the field of filtering equipment technology, and is especially one kind of belt type pressure filter. Technologically, the belt type pressure filter is provided with one sealed pressurizing compartment with air inlet, material inlet and filtering chamber; one driving wheel and one sliding mechanism fixed separately to ends of the filtering chamber; one filter belt around the filter driving mechanism comprising the driving wheel and the sliding mechanism; one material container and one filtrate outlet set in the ends of the filter driving mechanism. The belt type pressure filter has the features of relatively high air pressure difference between the pressurizing compartment and the filtering chamber, complete separation of solid and liquid, excellent filtering effect wide application range, simple structure and convenient maintenance.

The invention provides a self-adaptive filtering method for a carrier smoothed code pseudorange. The method includes the steps: constructing a Kalman filtering basic equation, estimating and performing self-adaptive adjusting on a system noise error through the maximum likelihood criterion, carrying out carrier smoothed code pseudorange Kalman filtering, and obtaining the estimated system noise error after iteration. According to the method, the system noise is obtained without statistic analysis of a carrier smoothed code pseudorange system before filtering, a system noise empirical value is provided to serve as an initial value, and self-adaptive adjusting is performed on the system noise error during a subsequent process. In this way, pseudorange smoothed result errors caused by cycle slips are prevented from being too serious, and a filtering effect in a cycle clip condition is better than a conventional Kalman filtering effect.

The invention relates to antibacterial filtering ceramic, in particular to in-situ composite antibacterial filtering ceramic as well as a preparation method and application thereof. The composite antibacterial filtering ceramic is prepared from the following components in percentage by mass: 60 to 75 percent of kieselguhr, 10 to 20 percent of hydroxyapatite, 10 to 30 percent of purple sand, 0.1 to 2 percent of silver and 1 to 5 percent of an adhesive, and the mass percentage sum of the five components is 100 percent. The diameter of the silver is 3 to 20 nm, and the silver is located on the surface and in gaps of the kieselguhr. According to the in-situ composite antibacterial filtering ceramic, combination of nano silveer and porous kieselguhr, combination of the silver and the hydroxyapatite and combination of silver-carried hydroxyapatite and the porous kieselguhr are realized under a hydrothermal condition, so that the dispersivity of the silver and the binding force of the silver and a material are improved. The material is high in filtering performance, antibacterial property and antibacterial endurance, can effectively filter out microorganisms, impurity particles and organic matters from water, and can be widely applied to the field of water treatment and relevant industries.

The invention discloses a smashing device with an excellent screening effect for energy conservation and environment protection of a building, and belongs to the field of building material smashing. The smashing device with the excellent screening effect for energy conservation and environment protection of the building comprises a first box and a second box, an inner wall of the first box is movably connected with a filtering net, a side wall of the first box is connected with a first material conveying mechanism, and a bottom part of the first box is connected with a second material conveying mechanism; a second smashing mechanism comprises dynamic jaw plates and a static jaw plate, an inner wall of the first box is fixedly connected with a bracket, two groups of the dynamic jaw plates are provided, a bottom part of the dynamic jaw plate is connected with a connecting rod, and one end, far away from the dynamic jaw plate, of the connecting rod is rotationally connected with the filtering net; a gap is formed between a centrum roller and a conical cavity, the first smashing mechanism further comprises a first rotating shaft, and the centrum roller is in eccentric connection with the first rotating shaft; the smashing device provided by the invention can realize multiple smashing filtering, the filtering net is driven to move when the dynamic jaw plates move, and thus, a material screened can be conveyed through the first conveying mechanism to a feeding port so as to be smashed for many times.

The invention discloses a sewage treatment apparatus for intensively replacing a filtering device, and a replacement method thereof. The apparatus comprises a box body, a filter frame is arranged at the top of the inner cavity of the box body, the top of the filter frame extends to the outside of the box body, the tops of two sides of the filter frame are fixedly connected with support blocks, thebottoms of the support blocks are in contact with the top of the box body, the top of the left side of the box body is fixedly connected with an electric telescopic rod, the bottom of the electric telescopic rod is fixedly connected with a horizontal plate, the right end of the horizontal plate is fixedly connected with a first motor, and the bottom of the rotating shaft of the first motor is fixedly connected with a buffer mechanism. The apparatus has the advantages of intensive dismounting replacement of a filter plate, and good filtering effect, and solves the problem of the influences ofobstruction of the filter plate, easily caused by accumulation of impurities on the filter plate in the long-time filtering process due to inconvenient intensive replacement of most filter plates fixedly mounted in existing sewage treatment apparatuses, on sewage purification.

The invention discloses high-strength air filter paper and a preparation method thereof. The high-strength air filter paper is prepared from, by weight, 50-95 parts of glass fibers, 5-11 parts of a fiber adhesive, 8-13 parts of a dispersing agent, 1-5 parts of a liquid-state binding agent, 6-9 parts of surfactants and 3-8 parts of a cross-linking agent. According to the high-strength air filter paper, the dispersing agent and the liquid-state binding agent are added when the high-strength air filter paper is prepared, therefore, the service life of the filter paper can be effectively prolonged, and the filtering effect is better; meanwhile, due to the fact that the sulfate, sulfonate and phosphate surfactants are added in the preparing process, the surface tension of the filter paper can be effectively decreased, the strength of the filter paper can be improved, the very good water and oil repellence can be achieved, the high-strength air filter paper adapts to various high-temperature rugged environments, and the service life of a filter is prolonged.