51results about How to "Troubleshoot damage, etc." patented technology

The invention relates to the technical field of corn planter equipment, in particular to an arid land corn precision seeder with full membrane coverage double-earth furrow sowing. The precision seeder comprises a chassis (5), power equipment (1), and an inoculation chamber (2) installed on the chassis (5). The precision seeder is characterized in that a handle (3) is installed on the chassis (5); a seeding apparatus (4) is installed on the inoculation chamber (2); vertical-style planting equipment (6) is installed at the lower part of the chassis (5) corresponding to the seeding apparatus (4); a pulley (8) is also installed at the lower part of the chassis (5); a rubber crawler (7) is installed on the pulley (8); and the pulley (8) is connected to the power take-off shaft of the power equipment (1) by a strap. The equipment adopts a cam mechanism to compensate the advance speed of the machine. The seeding apparatus can achieve precision seeding, thus solving the problems of plastic film damage, seeder dyestripping and the like resulted from road wheel driving of the seeder, and improving the quality of corn seeding and reducing the production cost.

The invention provides a municipal solid waste deep well sealing and filling mining method and belongs to the technical field of mining engineering and environmental engineering. The municipal solid wastes are processed to form cubes or balls through a waste formation machine, the cubes or balls are transmitted to a mine enterprise from a treatment plant in peri-urban areas and then are conveyed to position under a well through a drilling pipe or an auxiliary shaft on the mine ground, then the cubes or balls are conveyed to a waste tunnel and a work surface through a flat car or a belt, closedtreatment on the municipal solid waste in a deep well waste tunnel is carried out through a volume filling technology according to different cases, and filling treatment on a replaced mine resource on a coalface through a strength filling process is carried out. The method solves the problem that the municipal waste treatment resource is limited and a mining waste space has a large space amount and a wide range, is a novel method for treatment on wastes with wastes and harm and disaster reduction for the city government and mine enterprise and is economic, environmentally friendly, safe and efficient.

The invention relates to a polarization structure achieving a naked eye 3D function and a manufacturing method of the polarization structure. The polarization structure achieving the naked eye 3D function comprises a polaroid and a 3D grating layer arranged in the polaroid, the 3D grating layer comprises a PET film and a lens structure arranged in the PET film, nitrogen is contained in the lens structure, or the interior of the lens structure is vacuum. The 3D grating layer with the lens structure arranged in the PET film is adopted, the lens structure can be effectively protected against the influence of external force, and the mechanical characteristic of the 3D grating layer can be prevented from being influenced by external stress in the attachment and application process of the 3D grating layer.

The invention discloses a construction method for an opening of a contact channel of an existing shield tunnel, which comprises the following steps of: firstly, supporting and reinforcing duct pieces which do not occupy a road in an opening area and an influence range by adopting a duct piece supporting and reinforcing device; then a three-pilot-hole three-step construction method is adopted for duct piece opening construction, specifically, a middle pilot hole is excavated firstly, and a middle pilot hole connector ring beam, a stand column and a temporary steel support are constructed; a left pilot tunnel is constructed, and the left side ring beam is closed; finally, a right pilot tunnel is constructed, the right side ring beam is closed, and at the moment, totally-closed construction of the opening area ring beam is completed; and dismantling the temporary support after the ring beam is closed and reaches the design strength. According to the method, construction treatment of the existing shield tunnel evacuation channel and the entrance and exit duct piece opening can be safely and rapidly completed, the construction progress is fast, structural deformation is small, the safety quality is guaranteed, the treatment period is effectively shortened, it is ensured that a set target of a construction unit is smoothly achieved, and social benefits and economic benefits are remarkable.

The invention relates to a control device for shifting of a gearbox for driving traveling. The control device comprises a shift signal detection circuit, an engine rotation speed signal detection circuit, a shift switch control circuit, a shift display circuit, a shift output control circuit, a programmable controller and an oil pump control circuit, wherein the shift signal detection circuit is used for detecting a shift signal of the gearbox, the engine rotation speed signal detection circuit is used for sampling a rotation speed signal of an engine, the shift switch control circuit is used for controlling the input and output of shifting, and the oil pump control circuit is used for receiving a control signal outputted by the programmable controller to enable an oil pump proportional amplifying circuit to output set current value, so as to control the displacement of a hydraulic pump. The control device has the advantages that as the programmable controller and the intelligent detection and control circuits are adopted, the design is novel, the structure is simple, the control performance is high, the reliability is high, and the like; the purpose of quick and safe shifting of the gearbox is realized; and the problems of difficult shifting, damage to gears, and the like caused by the defects of the prior art are effectively solved.

The invention discloses a built-in browser debugging method, a debugging terminal and a computer readable storage medium. By the adoption of the debugging terminal, firstly, trial codes of a target browser are obtained, the trial codes are stored in a local preset storage path, at the same time, a local IP address is obtained, and according to the IP address and the preset storage path, a debugging entry file of the target browser is generated and then is sent to built-in equipment; finally, the debugging terminal responds to a target browser debugging command input by a user, and then the target browser debugging command is sent to the built-in equipment, so that the built-in equipment responds to the target browser debugging command to parse the debugging entry file, and the trial codesin the preset storage path are loaded through the IP address; in this way, debugging personnel can debug the target browser without copying a trial file into the built-in equipment through a USB flashdisc or restarting the built-in equipment or the like, and therefore the debugging efficiency is greatly improved.

The invention relates to the field of mining machineries, in particular to a reciprocating impact part of a multistage protection sealing telescopic sleeve. The reciprocating impact part structurally comprises a multistage protection guide shaft box body, a crankshaft, a connecting rod, a guide impact piece, guide pieces and a main reciprocating tooth. The multistage protection guide shaft box body supports the guide pieces; the guide pieces support the guide impact piece to guide the guide impact piece; the crankshaft is connected with the connecting rod; and the crankshaft drives the connecting rod driving the guide impact piece to impact in a reciprocating mode. One end or the two ends of the guide impact piece stretches / stretch out of the multistage protection guide shaft box body; and the multistage protection sealing telescopic sleeve is arranged in the position, at the stretching end of the guide impact piece, of the multistage protection guide shaft box body. The guide impact piece comprises a guide rod sealing section. The shape of the cross section of the inner diameter of the multistage protection sealing telescopic sleeve is matched with the shape of the cross section of the outer diameter of the guide rod sealing section. The guide rod sealing box body section and a box body sealing piece are matched to prevent dust, muddy water, material and the like from entering the box body. According to the structure, maintenance in site is reduced, the maintenance cost is saved, the service life of a reciprocating mining machine is greatly prolonged, and the practical efficiency of the reciprocating mining machine is greatly improved.

The invention discloses a tire repair fixer which is provided with an upper clamp plate and a lower clamp plate; the upper clamp plate and the lower clamp plate are respectively and internally provided with a concave surface; a tire patch and a tire surface are fixed in a way of clamping at the upper part and the lower part; compared with the original beating fixing way, the tire repair fixer realizes the sticky fixing way between the tire patch and the tire surface, thus enabling adhesion to be more uniform, and being convenient and simple; and the concave surfaces are arranged in the clamp plates, so that spaces are reserved for the tire patch, the problems of uneven adhesion pressure, damage to a tire caused by the excessive pressure at the stuck part of the tire patch and the like can be solved, and the tire repair fixer bas good social benefit and practicability.

The invention provides city garbage incineration ash and a treatment method for deep burying, filling and closing of fly ash and belongs to the technical field of garbage treatment. According to the method, filler comes from garbage incineration ash and fly ash, the garbage incineration ash and the fly ash are compressed, pelletized, subjected to particle sealing and particle packaging, and then conveyed to a mine to serve as main aggregate for filling the mine, the ratio of material fly ash particles to other filling materials such as ash particles, an expanding agent, a retaining agent, an accelerator, cement and water according to the strength of a filling body, and after being stirred, the mixture is transported to the gob working face from the ground through filling complete equipmentlike a pipeline to carry out filling. The method can solve the problem that city garbage in China is difficult to treat, and the filling cost of the mine can be saved. The method has the characteristics of turning waste into wealth, being simple in construction technology, low in cost, high in filling body strength, clean and environmentally friendly.

Provided is a locked-rotor protector of a high pressure flow regulating valve. The problem that a traditional locked-rotor protector working by the adoption of a locked-rotor current detection mode cannot be applied to the high pressure flow regulating valve is mainly solved. The locked-rotor protector of the high pressure flow regulating valve is characterized in that the locked-rotor protector further comprises a starting detection module for detecting a starting signal of an electromagnetic valve, a rotation detection module for detecting rotation of an electromagnetic valve hand wheel and an electromagnetic valve control module for controlling the electromagnetic valve to cut off. The starting detection module is composed of a galvanometer diode set and an optocoupler. The rotation detection module is composed of the hand wheel installed on the high pressure flow regulating valve, a magnet fixed to the hand wheel and a reed switch sensor fixed to a valve body of the high pressure flow regulating valve. The electromagnetic valve control module is composed of three mutually independent relay modules. Each relay module controls on-off of one electromagnetic valve motor control line. A control signal port of the electromagnetic valve control module is connected to the electromagnetic valve control signal output end of a single-chip microcomputer.

The invention provides a preparation method of an energy-saving fire-resistant prefabricated part for a ferronickel pre-reduction rotary kiln. The prefabricated part is composed of an inner-layer wear-resistant heavy castable and an outer-layer low-heat-conduction light-weight heat-preservation castable. By adding an interface reactant, the heavy castable and the light castable are fused through interface reaction to prepare an integral material, the interface of the two materials is eliminated, thermal stress concentration generated by the difference of thermal expansion coefficients of materials between the inner layer and the outer layer in the operation process of the rotary kiln can be released in a transition layer between the inner layer and the outer layer, and damage caused by extrusion cracking of an interface between the heavy castable and the light castable is avoided. The problems of material damage and the like caused by falling and sliding of heavy materials in the prior art are also solved. The preparation method is simple and convenient, large-scale popularization and implementation can be achieved, and meanwhile the masonry construction efficiency is high.

The invention discloses a solar photovoltaic module installation structure for a roof. The solar photovoltaic module installation structure comprises a pedestal, wherein cavity is formed in the pedestal, a first rotating shaft is rotatably connected in the cavity, one end of the first rotating shaft passes through the upper side wall of the pedestal and is fixedly connected with a handle, the other end of the first rotating shaft is fixedly connected with a first gear, one side of the first gear is provided with a limiting device, the other side of the first gear is meshed and connected with asecond gear, a threaded rod is inserted in the central position of the second gear, the upper side of the pedestal is fixedly connected with a shell body, and one end of the threaded rod passes through the pedestal and extends into the shell body. Through adopting a plurality of structures such as the gears, the threaded rod, a threaded sleeve, a rotating rod and the rotating shafts, a solar photovoltaic panel can be bent and folded, thus accumulated snow on the solar photovoltaic panel slides off when snow falls, and the problems such as damage to the solar photovoltaic panel caused by pressure of the accumulated snow is further solved.

The invention provides a nanoimprint photoresist and a preparation method thereof. The nanoimprint photoresist comprises the following components: light-cured resin, modified polyurethane resin, a surfactant, nano silicon dioxide aerosol, a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, a photoinitiator and a solvent. The preparation method of the modified polyurethane resin comprises:heating an aqueous dispersion of ferrous sulfide and graphite fluoride to 80 DEG C, stirring for 2 hours, adding waterborne polyurethane acrylate, uniformly dispersing, and volatilizing water, whereinthe addition ratio of the light-cured resin to the modified polyurethane resin to the tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer is 30: 30: 10.

The invention relates to a full-time four-wheel-drive automobile braking force detection apparatus, comprising a braking inspection bench mechanical unit, a single-chip microcomputer and a circuit control system; the single-chip microcomputer and the circuit control system acquire data, process the data and output the data for braking force of the braking inspection bench mechanical unit, so that high-precision high-reliability inspection is provided for the braking force of a full-time four-wheel-drive automobile. In detection of front wheels, the front wheels are positioned on a braking roller set, a tire tightening device operates and tightens tires to prevent their movements from affecting detection results, and rear wheels rotate together on a free roller set; in addition, in detection of the rear wheels, the front wheels are arranged on the free roller set, and the rear wheels are arranged on the braking roller set. The problem that detection by a traditional braking force inspection bench may cause transmission damage to a four-wheel-drive vehicle can be solved effectively, and the risk of the vehicle being damaged is avoided.

The invention relates to the technical field of electricity meter display screen processing equipment, and discloses automatic edging equipment for an electricity meter display screen. The automatic edging equipment comprises a side baffle, and a supporting plate is fixedly mounted on one side of the bottom of the side baffle. A connecting plate is fixedly mounted at the bottom of one side of thesupporting plate, a driving motor is fixedly mounted at the top of the connecting plate, and one side of the front face of the side baffle is rotationally connected with a rotary rod. One end of the rotary rod extends to the back face of the side baffle, and the other end of the rotary rod is fixedly sleeved with a rotary ring located on the back face of the side baffle. A fixed block is fixedly mounted on one side of the front face of the side baffle. According to the automatic edging equipment for the electricity meter display screen, by means of mutual cooperation of a first electric hydraulic rod, a limiting plate, a micromotor, a grinding rod and a grinding head, the electricity meter display screen can be subjected to edging treatment better, and therefore the problem that in the process of carrying out edging treatment on the electricity meter display screen through the edging equipment, the electricity meter display screen is likely to be damaged is solved; and the edging success rate of the electricity meter display screen is increased.

The invention discloses an automobile rubbing strip and aims at solving the problems that vehicle rubbing strips are not easy to discover, can cause damage to vehicles easily and the like in the absence of light sources and power supplies at present. The rubbing strip comprises a rubbing strip body and a fixed mounting portion, wherein the fixed mounting portion is arranged on the inner side of the rubbing strip and a composite layer structure is arranged on the outer surface of the rubbing strip body; and the composite layer structure comprises fluorescent layers and reflective layers which are arranged at intervals in a sectional form. The rubbing strip is simple in structure and can still emit light in the absence of light sources, and accidental damage to the vehicles is prevented effectively.

The invention discloses a self-positioning vertically-stacked process tray. The self-positioning vertically-stacked process tray comprises a tray body and a positioning device, wherein the tray body is provided with a containing groove for containing workpieces, the positioning device comprises a positioning rod and a positioning column, the lower end of the positioning rod penetrates through the tray body to be connected to the positioning column, a containing hole is formed in the lower end of the positioning column and matches with the upper end of the positioning rod, and an anti-falling part is arranged on the positioning rod. According to the self-positioning vertically-stacked process tray and the manufacturing method thereof, the positioning device is arranged on the tray body, so that the tray can be vertically stacked, layers are not overlapped, neat and reliable, and the problems that a traditional process tray is overlapped in layers and must be stacked in a staggered mode, the occupied station area is large, the tray is extremely prone to being turned over in the moving process, and materials are damaged due to the fact that corners of the upper-layer tray fall into the lower-layer tray are solved.

The invention belongs to the technical field of vacuum pumps, and particularly relates to a diaphragm vacuum pump. The diaphragm vacuum pump comprises a shell, an air cylinder and a protection box, ahollow cavity is formed inside the shell, the upper surface of the hollow cavity is fixedly connected with the air cylinder, an output shaft of the air cylinder is fixedly connected with a moving column, moreover, the lower surface of the moving column is fixedly connected with a diaphragm, and the protection box is arranged on the side surface of the right side of the hollow cavity. According tothe diaphragm vacuum pump, the problems that when the diaphragm vacuum pump is directly used for vacuumizing a device, a liquid or water vapor in the device is prone to be sucked into the diaphragm vacuum pump, meanwhile, under the condition that if the device is internally in the high temperature, when hot air in the device is directly extracted, the diaphragm inside the diaphragm vacuum pump isprone to being damaged and the like are effectively solved, and the service life of the diaphragm vacuum pump is effectively prolonged.

The invention discloses a data line storage device with good sealing performance. The data line storage device comprises a storage box, a storage groove is formed in the inner side of the middle of the storage box, a mouth-shaped sealing strip is fixedly connected to the position, corresponding to a groove opening of the storage groove, of the side wall of the storage box, and two clamping groovesare symmetrically formed in the side wall of the side, close to the groove opening of the storage groove, of the storage box. The data line storage device has the beneficial effects that a first fixing hook of a fixing block and a second fixing hook of an L-shaped fixing block are controlled by stretching and retracting of a first spring and a second spring, so that the first fixing hook and thesecond fixing hook are mutually clamped or separated, and the storage box and a box cover are fixed or separated; and the mouth-shaped sealing strip is arranged in a mouth-shaped groove, and the outerwall of a sealing block is attached to the inner wall of the storage groove, so that the sealing performance of the storage device is improved, and the problems that most data line storage devices are poor in sealing performance, consequently, data line connectors are filled with dust, and data lines are damaged after water accidentally enters the data line connectors are effectively solved.

The invention discloses a detachable automobile body rubbing strip and aims at solving the problems that vehicle rubbing strips are not easy to discover, can cause damage to vehicles easily and the like in the absence of light sources and power supplies at present. The rubbing strip comprises a rubbing strip body and a fixed mounting portion, wherein the fixed mounting portion is arranged on the inner side of the rubbing strip body, a plurality of detachable reflectors and fluorophors are arranged on the rubbing strip body and arranged in a staggering mode, and the block-shaped reflectors are connected with the rubbing strip body through detachable buckles. The rubbing strip is simple in structure and can still emit light in the absence of light sources, and accidental damage to the vehicles is prevented effectively.

The invention belongs to the technical field of connecting equipment, and particularly relates to a packaging box connecting device. The packaging box connecting device comprises a male seat assemblyand a female seat assembly which are separately installed on two adjacent packaging boxes; the male seat assembly includes a male mounting base and a spring bolt, the spring bolt is mounted on the male mounting base; the female seat assembly includes a female mounting base and a locking member, and the female mounting base is provided with a female mounting cavity; and a locking hole used for hooking arranging of the sprig bolt is formed in one side part of the locking member, and the other side part of the locking member is rotatably mounted on the cavity bottom surface of the female mountingcavity so that the locking hole can be located outside the female mounting cavity. Since the locking member of the packaging box connecting device according to the embodiment of the invention can rotate relative to the female mounting cavity, when the female seat assembly and the male seat assembly do not need to be connected, the locking member is pushed to rotate, so that the locking member isreceived in the female mounting cavity, and the problems of collision and damage caused by the locking member located outside the female mounting base are solved.

The invention proposes a startup and a shutdown system and method capable of preventing false triggering, and the system comprises a first power supply module, a second power supply module, a force measurement unit, a control module and a second magnetic force module, wherein the force measurement unit and the control module are located on a mainboard, and the second magnetic force module is located on a middle backboard. The first power supply module supplies power to the force measuring unit; the force measuring unit is used for measuring the acting force between the first magnetic module and the second magnetic module and converting the acting force into a level signal, and outputting a level signal for switching on and off by comparing the level signal with the initial level signal; and the control module is connected with the force measuring unit and is used for executing startup and shutdown operation according to the level signal and the state of the power button. Electrodes between the first magnetic module and the second magnetic module are the same or opposite. Based on the system, the invention further provides a method for preventing the startup and shutdown from being triggered by mistake, the startup and shutdown operation can be effectively prevented from being triggered by mistake, and the board card can be effectively protected from being damaged by operations such as violent insertion and extraction of machine nodes.

The invention relates to a short-circuit and under-voltage protection method for a 12V120W direct-current power converter. When a system is powered on and delayed for a period of time, voltage dividerresistors R21 and R23 are used for detecting the output voltage; after voltage division, a pin 7 of a low-power-consumption control chip U5 detects a low level, which means that external short circuit or overcurrent occurs; the output of a pin 4 of the low-power-consumption control chip U5 is changed from a low level to a high level, a triode Q5 is controlled to be conducted, an optocoupler primary side diode is conducted, and a secondary side triode is conducted; a COMP pin of a power supply conversion chip UC3845 is pulled down, the OUT pin of the UC3845 is controlled to stop outputting a PWM signal, and then, the whole converter does not output, namely, the power supply converter is in an open-circuit state, and in the state, even if the output continues to maintain a short circuit phenomenon, the problem that an electric device is damaged does not occur; and the short circuit is cancelled after the control, the power supply ACC is restarted, and the converter resumes work.

The utility model relates to a high-pressure flow regulating valve blocking protector. It mainly solves the problem that the traditional blocking protector working in the way of detecting the blocking current cannot be applied to the high-pressure flow regulating valve. It is characterized in that: the locked-rotor protector also includes a start-up detection module capable of detecting the start-up signal of the solenoid valve, a rotation detection module capable of detecting the rotation of the handwheel of the solenoid valve, and a solenoid valve control module capable of controlling the shut-off of the solenoid valve; wherein, the start-up The detection module is composed of a current detection diode group and an optocoupler; the rotation detection module is composed of a handwheel installed on the high-pressure flow regulating valve, a magnet fixed on the handwheel, and a reed switch sensor fixed on the high-pressure flow regulating valve body Composition; the solenoid valve control module is composed of 3 relay modules independent of each other, and each relay module controls the on-off of a solenoid valve motor control line; the control signal port of the solenoid valve control module is connected to the solenoid valve control of the single-chip microcomputer signal output.

A nanoimprinted photoresist and preparation method therefor. The nanoimprinted photoresist comprises the following components in percentage by weight: 65-97% of an organic small-molecular solvent, 1-30% of resin, 0.01-5% of graphite fluoride and a derivative thereof, 0.01-5% of a surfactant, and 0-1% of an additive. Graphite fluoride and a derivative thereof are added to the nanoimprinted photoresist, and because graphite fluoride and the derivative thereof have low surface energy, the problems such as pattern defects and mold damage during demolding caused by an excessive adhesive force between a traditional photoresist having high surface energy and the mold are resolved.

The invention relates to an automatic rollback control system and method for a rock drill. The system comprises an electrical system, a hydraulic control handle, a control valve block, a pushing oil cylinder, a first pressure switch and an oil tank, and the control valve block comprises an automatic rollback control valve group, a hydraulic-control proportional multiway valve, an overflow valve, a throttle valve and a travel control valve; the automatic rollback control valve group comprises a reversing solenoid valve group and a second pressure switch; when the rock drill moves to the top end of a push beam, a stroke valve is touched, the pressure switches act and send out signals, the rock drill stops drilling automatically and retreats to a specified location, and in the retreating process, if the rock drill needs to move forwards, a person only needs to operate the handle again. Accordingly, the phenomena that when the rock drill drills into the top end of the push beam, the push beam is damaged, and the rock drill idles can be avoided, it can be guaranteed that the rock drill is in a controllable state in the automatic retreating process, operation is convenient, use is safe and reliable, and the efficiency is high.

The invention provides a ship ballast water sampling device. The device comprises a base, a cover plate, a water taking plate, a water wheel and a rotating shaft, a water inlet and a water outlet are formed in the two ends of the base respectively, a rotating groove is formed in the cover plate, and the water taking plate is located in the rotating groove and can rotate in the rotating groove; a sliding groove is formed in the base, a water taking opening communicated with the sliding groove is formed in the side wall of the base, a sliding block and an elastic piece are arranged in the sliding groove, one end of the elastic piece is connected with the sliding block, the other end of the elastic piece is connected with the base, a magnetic block is arranged on the water wheel, and the magnetic block can drive the sliding block to move in the sliding groove through magnetism; a water storage tank is arranged on the cover plate, the water storage tank corresponds to the sliding groove and communicates with the sliding groove, an inlet check valve is arranged in the water storage tank and is arranged at the communicating position of the water storage tank and the sliding groove, and an outlet check valve is arranged at the water taking opening; a water taking groove is formed in the water taking plate, and a through hole is formed in the side wall of the base; and when the water taking plate rotates, the water taking groove can communicate with the through hole and the water storage groove at intervals.

The invention discloses automatic textile fabric cleaning equipment capable of preparing non-woven fabric cleaning fluid according to weight. The automatic textile fabric cleaning equipment comprises an equipment assembly and a working box arranged in the equipment assembly, wherein a mechanism cavity and a cleaning cavity arranged on the lower side of the mechanism cavity are fixedly arranged in the working box. Corresponding amount of a cleaning agent can be automatically input into a cleaning pool according to the weight of non-woven fabric needing to be cleaned, a sliding rod is driven to move downwards through pressure transmitted by a spring, the sliding rod drives a push plate to push the non-woven fabric into the cleaning pool and drives an output port of the cleaning agent to be opened at the same time, the cleaning agent is discharged into the cleaning pool through a pipeline, a water pipe is arranged in a pipe cavity where the cleaning agent is input, water in the water pipe can effectively prevent the cleaning agent from being attached to the inner wall of the pipe cavity, a flexible grinding and rubbing plate is arranged in the cleaning pool, the non-woven fabric can be gently rubbed, and the problems that some places of the non-woven fabric cannot be completely cleaned, the cleaning effect is poor, and the non-woven fabric may be deformed and damaged can be solved.