3468results about How to "Prevent backflow" patented technology

The invention relates to the technical field of turning machining, in particular to a numerical control turning machine tool for fastener machining, which comprises a machine shell, a tool rest column body, a tool apron body and a chuck, and further comprises a surface cover shell bolted to the tool apron body, a plurality of auxiliary rollers are rotatably connected to the inner side of the cover shell, a magnetic synchronous belt is further arranged on the inner side of the cover shell, and the magnetic synchronous belt is arranged on the outer side of the tool apron body. The side, close to the housing, of the tool apron body is further in bolting connection with a fixing plate, and the surface of the fixing plate is in bolting connection with a square electromagnet. The square electromagnet is started, and when the tool apron body moves, metal chips on the top and the side edge of the tool rest column body are attracted to the surface of the magnetic synchronous belt, so that the situation that the magnetic synchronous belt is directly contacted with the tool rest column body to be stained and damaged in a large area is avoided; in the process of adsorbing the metal chips, the metal chips cannot move slightly on the surface of the tool rest column body, the tool rest column body is not prone to being abraded, and the service life of the tool rest column body is prolonged.

The invention discloses dust falling equipment for municipal road construction and a using method, and relates to the technical field of construction dust falling, the dust falling equipment comprises a chassis and universal wheels fixedly installed on the periphery of the bottom of the chassis, the top of the chassis is fixedly connected with a top plate, the dust falling equipment further comprises a water tank, a driving mechanism is fixedly connected to one side of the top of the top plate, and the driving mechanism is arranged on one side of the water tank; a spraying mechanism is arranged on the other side of the top of the top plate; the pressure pump is fixedly installed on one side of the top of the water tank, the end, away from the pressure pump, of the drainage pipe is connected with a telescopic pipe, and a spraying barrel is installed on the top of the top plate; the driving mechanism comprises an upper box body, and the bottom of the drainage pipe is connected with a connecting pipe; the spraying mechanism comprises a cam and a flange plate, the interior of the flange plate is connected with a rack in a sliding mode, and the problems that transverse swing adjustment and vertical swing adjustment of the device are adjusted through a servo motor and an electric hydraulic push rod respectively, operation is inconvenient, the adjustment efficiency is not high, and more energy is consumed are solved.

The invention provides swimming pool cleaning equipment, and relates to the technical field of swimming pool cleaning. The swimming pool cleaning equipment comprises a base body which comprises a bottom face and a containing cavity, and a liquid inlet communicated with the containing cavity is formed in the bottom face. And the rolling brush is rotationally connected with the base body, and the rolling brush and the liquid inlet are arranged in a spaced mode in the advancing direction of the swimming pool cleaning equipment. And the turbidity detection device is arranged on the bottom surface of the base body, is positioned between the liquid inlet and the rolling brush, and is used for detecting the turbidity of the liquid. In the advancing direction of the swimming pool cleaning equipment, the distance between the turbidity detection device and the central axis of the liquid inlet is a first distance, the minimum distance between the turbidity detection device and the rotating central axis of the rolling brush is a second distance, and the first distance is larger than the second distance. According to the swimming pool cleaning equipment provided by the embodiment of the invention, the turbidity of the liquid can be accurately measured, so that the swimming pool cleaning equipment can more intelligently plan a cleaning path, key areas are ensured to be fully cleaned, unnecessary repeated cleaning is reduced, and then the cleaning efficiency is improved.

The invention discloses continuous purification equipment for sewage treatment, and relates to the technical field of sewage treatment, the continuous purification equipment comprises a treatment cylinder, the top of the treatment cylinder is provided with a cylinder cover, and the side wall of the treatment cylinder is provided with a mounting rack. Through the arrangement of the baffle, the sealing plate, the L-shaped telescopic plate, the limiting column, the chute, a limiting plate, an adjustable-speed motor, a first bevel gear, a second bevel gear, a connecting shaft and a mounting block, the blockage time of the filtering mechanism is adaptively judged along with the adding amount of a flocculating agent, so that the backwashing frequency of the filtering mechanism is adjusted, manual adjustment is not needed, convenience and rapidness are achieved, and the practicability is high. The device is simple in structure and high in applicability, through the arrangement of the filtering mechanism, automatic overturning for backwashing along with the blocking speed of the first filter plate is achieved, no additional water resource is needed for backwashing, and through the arrangement of the second filter plate, when the first filter plate is overturned for backwashing, the second filter plate can continue to conduct certain filtration; continuous filtration of sewage is ensured, and the sewage treatment working efficiency is improved.

The utility model relates to the technical field of drainage bags and discloses an anti-backflow drainage bag which comprises a drainage bag body and a drainage tube, a drainage connector is arranged in the center of the upper end of the drainage bag body, an anti-backflow assembly is arranged at the upper end of the drainage connector, and a liquid outlet in the lower end of the drainage tube is connected with the upper end of the anti-backflow assembly. A side frame is arranged on one side of the back of the drainage bag body. According to the anti-backflow drainage bag, by arranging the fixing blocks, the side frames can be fixedly installed conveniently, when the anti-backflow drainage bag is fixed to the body of a patient, the side frames can limit the position of the drainage bag body, the drainage bag body is effectively prevented from being tightly attached to the skin of the patient, the air permeability between the drainage bag body and the skin of the patient is guaranteed, and the comfort of the patient is improved.

The utility model relates to a secondary bionic vein-shaped micro-channel cooling plate which comprises a plate body, a central main channel is arranged at the central position in the plate body, and an outlet auxiliary channel connected with the central main channel is respectively arranged at the edges of the two sides of the plate body; a plurality of first-stage bionic vein-shaped small channels are arranged between the central main channel and the two outlet auxiliary channels; and a plurality of second-stage bionic vein-shaped micro-channels are arranged on the two sides of each first-stage bionic vein-shaped small channel. Under the condition of not additionally increasing the conveying power consumption of fluid in a flow channel, the high-temperature area of a heat source center can be rapidly cooled, the temperature field in the plate body can be highly homogenized, the temperature uniformity of the cooled power battery is improved, and compared with a conventional liquid cooling plate, the cooling plate has the advantages of being simple in structure and convenient to use. And the highest temperature of the power battery and the battery tabs can be reduced, and the temperature difference between the two tabs of the battery is reduced.

According to the valve type opening and closing hysteroscope, before examination or operation, when an opening and closing valve is in a closed state and reaches an examination position or an operation position, the opening and closing valve is opened through an opening and closing handle, the opening and closing valve can open the examination position or the operation position, and examination or operation is conducted through a micropore camera on an imaging seat; when tissue fluid or blood blocks an examination position or an operation position, the flushing fluid assembly pumps flushing fluid into the examination position or the operation position, after flushing, the vacuum extraction assembly is started to suck away mixed fluid of the tissue fluid or the blood and the flushing fluid through the negative pressure suction hole, and after examination or operation is completed, the opening and closing valve is closed through the opening and closing handle, and the flushing fluid or the flushing fluid is pumped into the examination position or the operation position. In this way, the problem that tissue fluid or blood flowing out of the human body blocks the view field of the hysteroscope can be effectively solved, and when the opening and closing valve is closed, the imaging assembly is in a streamline shape and can conveniently stretch into the hysteroscope for examination or operation.

The invention discloses a sulfur hexafluoride gas purifying and filtering device, belongs to the technical field of sulfur hexafluoride gas filtering, and aims to solve the problems that the impact force of gas input into a tank body is relatively strong, the filtering efficiency and the filtering effect are relatively poor, and water in gas needs to be transferred to other equipment for treatment when being separated. A filtering mechanism for conveniently filtering gas is arranged in the gas filtering tank, and a water removal mechanism for conveniently separating water contained in the gas is arranged in the gas filtering tank. According to the sulfur hexafluoride gas purifying and filtering device, the air bellow is connected to the inner end of the air inlet pipe arranged above the filtering mechanism, the hedging air pipes are arranged on the two sides of the air bellow, and the air outlet ends of the hedging air pipes are oppositely arranged; therefore, speed reduction of the high-speed gas is achieved through hedging.

The invention relates to the technical field of agricultural machinery, in particular to a movable pit digging device for seedling planting. The invention provides the movable pit digging device for seedling planting, which can discharge soil on the spiral drill rod, prevent the soil from flowing back and improve the pit digging efficiency and quality. A movable pit digging device for nursery stock planting comprises a crawler, bolts, a connecting frame, a pit digging mechanism and a soil retaining mechanism, the connecting frame is detachably connected to the upper side of the crawler through a plurality of bolts, the pit digging mechanism capable of digging pits in the ground is arranged on the connecting frame, and the soil retaining mechanism capable of retaining soil is arranged on the pit digging mechanism. When the spiral drill rod rotates downwards to dig holes, a baffle is always attached to the spiral drill rod through the acting force of a second spring, soil on the spiral drill rod is discharged to the outer side of a baffle frame through the baffle, and the effects that the soil on the spiral drill rod can be discharged, soil backflow is avoided, and the hole digging efficiency and quality are improved are achieved.

The invention provides a split type shielding electric gear pump and a cooling method thereof, and can solve the problems that a motor and a gear pump of an existing integral type shielding electric gear pump cannot be independently assembled, the motor and the gear pump cannot be integrally decomposed, so that the gear pump is inconvenient to independently carry out a running-in test, and the gear pump leaks. The electric gear pump comprises a gear pump body and a motor, the gear pump body comprises a pump shell and a pump shaft, the motor comprises a machine shell, a stator and a rotor, one end of the pump shell is connected with one end of the machine shell through a sealing end face, air gaps are formed among the rotor, the stator and the machine shell, the input end of the pump shaft extends out of the pump shell and extends into the machine shell, and a leakage gap is formed between the input end of the pump shaft and the pump shell. The input end of the pump shaft is coaxially connected with one end of the rotor, the rotor is provided with an axially-through motor backflow channel, the pump shaft is provided with an axially-through gear pump backflow channel, and the space in the pump shell, the leakage gap, the air gap, the motor backflow channel and the gear pump backflow channel form a working medium cooling loop.

The invention discloses an automatic ash removal type thermal cycle supercritical CO2 flue gas heat exchanger which comprises a connecting frame, a first sealing cover and a second sealing cover are connected to the front side and the rear side of the connecting frame through bolts correspondingly, a dust suction assembly is arranged on the front side of the first sealing cover, and a heat exchange pipe is fixedly connected to the interior of the connecting frame; a plurality of heat conduction fins are fixedly connected to the heat exchange pipe, and one end of the heat exchange pipe is fixedly connected with a first air inlet pipe. According to the cleaning device, a servo motor drives a corresponding reciprocating lead screw to rotate, a cleaning assembly can be driven to reciprocate along a limiting rod through a mounting plate through transmission of a first chain wheel and a first chain, in the moving process of the cleaning assembly, an arranged gear is meshed with a rack, a corresponding rotating shaft can be driven to rotate, and through transmission of a second chain wheel and a second chain, the cleaning assembly is driven to rotate. And the rotating shafts can be driven to rotate, so that the connecting shafts arranged between the rotating shafts are driven to rotate, and the cleaning brushes can be driven to rotate to clean the exteriors of the heat exchange tubes and the heat conduction fins.

The invention belongs to the technical field of food instruments, and particularly relates to an integrated intelligent household bean curd machine and a working method thereof.The bean curd machine comprises a water storage module, a grinding module, a filtering module, a marinating mechanism and a pressing mechanism; a heating component is arranged in the pulping module, the water storage module is communicated with the pulping module through a pipeline, the outlet end of the pulping module corresponds to the inlet end of the filtering module, the filtering module and the marinating mechanism are communicated with the pressing mechanism through a Y-shaped joint, and the heating component is arranged in the heating component. The outlet end of the filtering module is connected with a first inlet of the Y-shaped connector, a powder outlet channel of the marinating mechanism is connected with a second inlet of the Y-shaped connector, and a feeding port of the pressing mechanism is connected with a discharging port of the Y-shaped connector. The invention provides a stirring-free full-automatic integrated bean curd machine which is convenient for making different types of bean curds.

The invention discloses an anti-condensation device of a powder grinding and selecting machine for cement processing, and belongs to the technical field of cement processing devices. A powder grinding and selecting machine anti-condensation device for cement processing comprises an air bellow, a crushing box communicated with the air bellow is fixedly installed on the surface of the top end of the air bellow, a powder grinding and selecting box communicated with the crushing box is fixedly installed on the surface of the top end of the crushing box, a circular truncated cone column is fixedly installed in the powder grinding and selecting box, and a lower disc is fixedly installed on the surface of the circular truncated cone column. An upper disc sealed with the inner wall of the powder grinding and selecting box is fixedly mounted above the lower disc; and a plurality of rotatable outer air guide blades are arranged between the lower disc and the upper disc. Compared with a traditional fixed blade, the anti-condensation device of the powder grinding and selecting machine for cement processing has the advantages that the adjustable air guide blade enables air flow to flow evenly, powder selecting efficiency is improved, backflow of cement fine powder materials is avoided, abrasion to the inner air guide blade and the outer air guide blade is reduced, the service life of the air guide blade is prolonged, and the service life of the powder grinding and selecting machine is prolonged. And the noise is reduced due to uniform airflow flowing.

The invention relates to the technical field of needleless injectors, and discloses novel needleless injector equipment which is composed of a shell, a liquid medicine bottle and an injection mechanism. The liquid medicine bottle is communicated with the injection medicine cylinder of the injection mechanism, and when injection is needed, liquid medicine is firstly extracted into the injection medicine cylinder from the liquid medicine bottle through the first liquid inlet hole. One end of the cylindrical channel is connected with the nozzle, and the other end of the cylindrical channel is connected with the piston rod. The power assembly controls movement of the piston rod through the excitation assembly. A conduction valve is further arranged in the injection medicine cylinder, and a second annular channel is formed through the outer annular groove and the inner annular groove so as to prevent liquid medicine from flowing back. A small medicine storage tube is arranged at the end, close to the injection tube, of the piston rod and used for storing liquid medicine. In the injection process, the power assembly pulls the piston rod to form vacuum negative pressure, so that liquid medicine is sucked into the injection tube through the third medicine inlet hole and the small medicine storage tube. The power assembly pushes the piston rod to reversely move at a high speed, and liquid medicine is injected at high pressure through the injection pipe and the nozzle.

The invention discloses a wind turbine blade material degradation and recycling device in the technical field of wind turbine blade recycling, comprising a preheating tank and a Stirling engine, wherein the inner wall of the preheating tank is provided with a preheating chamber; the input end of the Stirling engine is connected with the preheating chamber, and the output end of the Stirling engine is provided with a crushing mechanism for crushing the wind turbine blades; a wind selection mechanism for screening wind turbine blade fragments is provided below the preheating tank, the wind selection mechanism comprises a base, a wind selection channel and a wind selection chamber are provided in the base, a recovery plate is provided in the wind selection chamber, a plurality of screening holes are provided on the recovery plate, and the screening holes are successively reduced in order from top to bottom; a fan is provided on the side of the recovery plate away from the wind selection channel, a heating chamber is further provided below the recovery plate, and an insulating mechanism for sealing the heating chamber is provided between the heating chamber and the recovery plate; the reuse rate of heat energy is improved by the Stirling engine and the wind selection mechanism, the wind turbine blades are preheated, and the processing efficiency of the blades is improved.

A mining monitoring device disclosed by the present invention comprises a mounting rack and a monitoring body, the monitoring body comprises a shell and a lens, the mounting rack is provided with a first cleaning mechanism, a second cleaning mechanism and a gas conveying mechanism, the first cleaning mechanism is used for cleaning the shell, the second cleaning mechanism is used for cleaning the lens, and the gas conveying mechanism is used for conveying gas to the shell. The gas conveying mechanism is used for providing stable gas flow for the second cleaning mechanism. According to the invention, the cleaning member reciprocates along the housing to clean the housing of the monitoring body, the nozzle rotates along the lens to dedust the lens of the monitoring body, and the housing of the monitoring body is cleaned in a contact manner and the lens of the monitoring body is cleaned in a non-contact manner, so that automatic cleaning of the monitoring body is realized. And the maintenance efficiency and the operation stability of the monitoring device are improved.

The utility model provides a large-height-difference gravity liquid supply refrigerating system, which relates to the technical field of refrigerating systems and comprises a refrigerating compressor, an oil separator, a condenser, a first liquid storage device, an electric control valve, a gas-liquid separator, a heat exchanger, a second liquid storage device, a stop valve, a filter, a liquid supply electromagnetic valve, an electric control valve, an evaporator, a stop valve for a sensor and the sensor. The device comprises a micro gas-liquid separator, a stop valve, a one-way stop valve and a liquid level switch. According to the high-altitude-difference refrigerating system, the problems of energy consumption caused by a pump liquid supply mode adopted by a traditional high-altitude-difference refrigerating system and excessive refrigerant charge amount caused by multi-time liquid supply can be effectively reduced, and energy conservation and emission reduction are facilitated; the influence of a static liquid column of a large-height-difference gravity liquid supply system on heat exchange of the evaporator can be avoided; the refrigeration tail end adopts an oil-free cold carrying mode, so that the heat exchange efficiency of the evaporator can not be influenced by an oil film; in addition, gravity liquid supply is adopted in the system, the machine room can be arranged on the roof and does not occupy the storeroom volume, and the storeroom volume can be effectively increased.

The invention discloses a hydraulic oil dissolved air ultra-vacuum separation device and a separation method thereof, and belongs to the technical field of hydraulic system oil purification. Comprising the steps that oil injection is conducted, an oil pump conveys crude oil from a negative-pressure crude oil tank into a separation oil cylinder, and by switching a first electromagnetic valve, oil inlet and oil discharge of a left cylinder and a right cylinder of the separation oil cylinder or oil inlet and oil discharge of the right cylinder and the left cylinder are achieved; after the separation oil cylinder is filled with the oil liquid, the first electromagnetic valve is closed, the oil charging and discharging pipeline is cut off, then the second electromagnetic valve is opened, and the air exhaust pipeline is communicated; measuring the gas content, injecting a small amount of separated hydraulic oil into the piston type oil gas content measurer, discharging the separated hydraulic oil to a negative pressure isolation oil tank, switching a first electromagnetic valve, switching on a third electromagnetic valve, and starting an oil pump; and after crude oil is injected into the right cylinder of the separation oil cylinder, oil in the left cylinder of the separation oil cylinder is discharged into the negative pressure isolation oil tank through the isolation piston ring. The method is simple to operate; discharge of extracted air can be achieved, and the air is prevented from flowing back into oil.

The invention discloses a red sandstone foundation pit drainage structure and a construction method thereof, and relates to the technical field of foundation pit drainage, the red sandstone foundation pit drainage structure comprises a buoyancy assembly, a water suction pump, an electromagnetic three-way valve and two sediment filtering assemblies, and the two sediment filtering assemblies are controlled by the electromagnetic three-way valve to alternately work; the silt filtering assembly in a working state is used for filtering silt, and the silt filtering assembly in an idle state is used for precipitating and collecting the intercepted silt. Alternate work of the two sediment filtering assemblies is achieved through the electromagnetic three-way valve, drainage continuity is guaranteed, the idle time of the sediment filtering assemblies is effectively utilized for sediment collection, and the situation that efficiency is reduced due to frequent cleaning of a traditional single filtering system is avoided; and the cleaned silt is independently collected, and does not enter the raw water body to cause the increase of the silt concentration and influence the subsequent drainage.

The invention discloses a combined type air conditioner purification system for a biosafety laboratory, and belongs to the field of air conditioner purification systems.The combined type air conditioner purification system comprises an air treatment unit, a pressure gradient maintaining unit and a comprehensive control unit.The air treatment unit comprises a filtering module, a temperature treatment module and a humidity treatment module; the filtering module is used for filtering particle impurities, dust and pollen in air and removing microorganisms in the air, the temperature processing module is used for increasing or reducing the air temperature, the humidity processing module is used for increasing or reducing the air humidity, and the pressure gradient maintaining unit is composed of an air feeder and a return fan. The air feeder is used for feeding air into the area, and the return fan is used for pumping back and discharging the air in the area. According to the invention, micro pollutants such as microorganisms can be effectively removed, and self-adaptive adjustment can be carried out according to environmental conditions in different areas.

The glass fiber reinforced plastic pipeline comprises a water inlet pipe and a smashing mechanism, a connecting sleeve is installed at the lower end of the water inlet pipe in a threaded mode, a water outlet pipe is installed at the right end of the connecting sleeve in a threaded mode, and flange plates are fixedly installed at the tail ends of the water inlet pipe and the water outlet pipe. And the detection mechanism comprises a sealing sleeve, an overflow hole and a humidity sensor, the overflow hole is formed in the inner side face of the sealing sleeve, the humidity sensor is installed in the sealing sleeve, the output end of the motor is connected with a smashing roller, and blades are installed on the surface of the smashing roller. According to the glass fiber reinforced plastic pipeline capable of being smashed and preventing blockage, the smashing mechanism is arranged to smash large impurities mixed in sewage, the glass fiber reinforced plastic pipeline is prevented from being blocked, the detection mechanism is arranged to detect the sealing performance of the glass fiber reinforced plastic pipeline and the connecting sleeve in time, timely overhaul is facilitated, and the filtering mechanism is arranged to filter the impurities and collect and clean the impurities conveniently; and the anti-backflow mechanism can prevent the sewage from flowing back.

The invention belongs to the technical field of sewage treatment, and relates to efficient catalytic ozonation equipment which comprises a water treatment tank and an ozone generation mechanism, one end of the water treatment tank is provided with a water inlet pipe orifice, the other end of the water treatment tank is provided with a water outlet pipe orifice, and a sewage pipeline is connected from the water inlet pipe orifice and flows through the water treatment tank for treatment. The multiple independent aeration chambers are formed in the water treatment tank through the upper partition plates and the lower partition plates, the sewage flow channels are formed through the upper partition plates and the lower partition plates, catalytic ozonation treatment of the multiple aeration chambers is conducted at a time when sewage is discharged, and the vacuum pump is installed at the top of each aeration chamber to recover ozone waste gas escaping from the sewage; and the gas suction pipe and the exhaust pipe are used for secondary conveying, so that the problem of waste caused by saturation of ozone is solved, the utilization rate of ozone is increased, raw material resources are saved, the economic cost of tail gas treatment is reduced, and the effect of efficient catalytic oxidation is achieved.

The invention relates to an anti-backflow device, system and method and a power generation system. The anti-countercurrent device comprises an AC-DC conversion power supply module used for taking power from an inverter power grid side to obtain a DC power supply signal to at least supply power to a main control module; the detection module is connected in series in the electric energy output branch of the single photovoltaic power generation unit and is used for detecting, obtaining and outputting a first flow direction signal containing current flow direction information in the electric energy output branch; the electronic switch module is connected in series in the electric energy output branch and is used for connecting or disconnecting the electric energy output branch; and the main control module is used for acquiring the first flow direction signal to obtain the current flow direction and controlling the on-off of the electronic switch module according to the current flow direction. According to the embodiment of the invention, current detection, reverse current blocking and automatic recovery can be automatically controlled by the system, manual intervention is not needed, and the maintenance cost of the power station is greatly reduced.

The flushing system comprises a water tank, a first water pump, a water inlet device used for supplementing water to the water tank and a spraying nozzle, the water inlet end of the first water pump is communicated with the water tank, and the water inlet device is connected with a water supplementing pipe; the spraying nozzle is provided with a first spraying channel and a second spraying channel which are mutually independent, the first spraying channel is supplied with water by the first water pump, and the water inlet end of the second spraying channel is communicated with a water supplementing pipe of the water inlet device, so that when water enters the water inlet device, part of water can flow into the second spraying channel along the water supplementing pipe. High-pressure water generated by the first water pump during normal flushing can be prevented from flowing backwards along the water replenishing pipe, and the water replenishing mode is simple in structure, high in reliability and low in cost.

The present invention belongs to the technical field of flood prevention and water retaining, and specifically discloses a non-powered flip-type flood prevention baffle device. It comprises: a base fixedly arranged on the ground, an arc-shaped pressure plate and a leaf spring mechanism arranged on the base, the other end of the leaf spring mechanism is connected to a water retaining plate with a hollow structure, and a locking mechanism is also provided on the base, which is used to lock the water retaining plate when the water retaining plate is in a horizontal state, and a limit column for limiting the maximum flipping angle of the water retaining plate. The present invention uses a leaf spring and an arc-shaped pressure plate as the rotating shaft of the flipping movement of the water retaining plate, provides torque for the flipping movement of the water retaining plate, so that the water retaining plate can flip according to a predetermined arc without deviation, and at the same time, the leaf spring mechanism plays the role of sealing and retaining water at the bottom of the device, and cooperates with the locking mechanism to realize automatic upward flipping and water retaining under flooding conditions without power, and automatically returns to the position and locks after the water recedes, without affecting traffic, and has a simple structure and strong flood prevention ability.

The fermentation tank comprises a fermentation tank body and a tank cover, a circular ring is fixedly installed at the upper end of the fermentation tank body, an annular groove is formed in the lower end of the tank cover, the circular ring is connected into the annular groove in a threaded mode, and a first sampling pipe is fixedly installed in the tank cover in a penetrating mode. According to the fermentation tank disclosed by the utility model, the fermentation tank body and the tank cover are arranged, so that closed fermentation is carried out, the sealing performance between the fermentation tank body and the tank cover can be improved through the sealing gasket, and the sampling efficiency is improved; external air and impurities in the air are prevented from entering the fermentation tank body to affect fermentation of fruit wine, the fermentation process in the fermentation tank body can be monitored and recorded in real time through the glass observation window, the tank cover can be screwed and detached, the interior of the fermentation tank body can be conveniently cleaned, and the fruit wine fermentation tank has the advantages of being high in practicability and convenient to sample.

The invention discloses a multilayer circuit board preparation method and system based on via hole filling optimization and a multilayer circuit board, and relates to the technical field of circuit board preparation, and the method comprises the steps: obtaining the size of a via hole, calculating the depth-to-width ratio, constructing a viscosity gradient function, taking a via hole filling quality evaluation index as a first optimization target, and solving an optimal ratio; designing a vacuum degree control strategy; the current capillary pressure is obtained, differential pressure driving force is calculated according to the current through hole gas pressure intensity, the time needed for filling and the preset ultrasonic vibration duration are calculated in combination with the through hole diameter, the hole depth and the viscosity gradient function, and ultrasonic auxiliary filling is carried out while through hole filling is carried out; filling the via hole, and controlling the vacuum degree according to the vacuum degree adjusting curve; and the real-time filling rate and the cavity volume are obtained, a second target function is constructed with the difference between the minimum target filling rate and the actual filling rate and the filling cost as a second optimization target, and the optimal filling step number and the optimal single injection material volume are solved.

The invention discloses a folding composite filter element module convenient to quickly replace, and relates to the technical field of sewage treatment.The folding composite filter element module comprises a rack and a conversion assembly, the conversion assembly is arranged in the rack, and the conversion assembly comprises an annular groove, an overturning frame, an electric rotating shaft, an inserting groove, an inserting plate, a pressure sensor, a supporting spring, a supporting plate and a water passing opening; an annular groove is formed in one side of the rack, a turnover frame is connected into the annular groove in a clamped mode, an electric rotating shaft is connected to the center of the turnover frame, inserting grooves are symmetrically formed in the two sides of the turnover frame, inserting plates are connected into the inserting grooves in a clamped mode, and pressure sensors are fixedly connected to the middles of the inserting plates. During use, after the filter element reaches the absorption limit, the standby filter element can be automatically switched to work, the situation that the device cannot normally operate due to the fact that a worker forgets to replace the filter element is avoided, the filter element is convenient to replace, the filter plate can be replaced according to the use environment, the filter element can be folded, and the filter element is convenient to store and carry.

The utility model provides a bidirectional anti-backflow circuit, a protection chip and an adapter plate. The bidirectional anti-backflow circuit comprises at least one anti-backflow module, each anti-backflow module comprises two anti-backflow branches with the same circuit structure, and each anti-backflow branch comprises a first control circuit, an isolation circuit, an IO circuit and a second control circuit. Wherein the first end of the first control circuit of one anti-backflow branch is coupled with the first end of the second control circuit of the other anti-backflow branch to form a first IO node, and the first end of the second control circuit of the anti-backflow branch is coupled with the first end of the first control circuit of the other anti-backflow branch to form a second IO node; wherein the control end of the first control circuit and the control end of the second control circuit of one anti-backflow branch are both coupled with a first driving signal, and the control end of the first control circuit and the control end of the second control circuit of the other anti-backflow branch are both coupled with a second driving signal. According to the utility model, bidirectional transmission and isolation protection between chips can be realized with low cost.

The invention discloses a cleaning agent recycling system, and relates to the technical field of detergent recovery, the cleaning agent recycling system is characterized in that the inner side wall of a filtering tank body is fixedly connected with a ceramic filtering plate, the high-performance ceramic filtering plate is uniformly provided with ultra-micropores, the aperture of the ultra-micropores is less than or equal to 1nm, the top of the ceramic filtering plate is provided with a slope, and the top of the slope is provided with a water inlet. The outer side wall of the filtering tank body is fixedly communicated with a feeding pipe, the feeding pipe is positioned above the ceramic filtering plate, and the bottom of the filtering tank body is fixedly communicated with a return pipe; through cooperative use of the filtering tank body, the ceramic filtering plate, the slope and the feeding pipe, cleaning agent molecules can be accurately screened out conveniently according to the characteristics that the diameter of the cleaning agent molecules is smaller than 1 nm, and the diameter of oil dirt impurities, bacteria and the like cleaned by a cutter is larger than 1 nm, and meanwhile the oil dirt impurities, bacteria and the like are effectively blocked. Therefore, the cleaning agent and the oil dirt impurities can be fully separated, the filtering effect is improved, and the recycling rate of the cleaning agent is increased.