166results about How to "Guaranteed negative pressure" patented technology

Provided is an automatic floor cleaning device for domestic use. The automatic floor cleaning device is provided with a shell body, a detection control system is arranged in the shell body, an advancing mechanism and a cleaning mechanism are arranged at the bottom of the shell body, the detection control system controls the advancing mechanism and the cleaning mechanism to clean the floor, the advancing mechanism is composed of a driving wheel and two universal wheels, and the driving wheel and the two universal wheels are arranged in the shape of a Chinese character 'pin', and are driven to walk by a power mechanism. The cleaning effect is good, and waste gas is utilized to achieve the flushing, water spraying and drying function through an air pump without increasing a power source.

The invention relates to a system of a cement kiln for co-treatment of household garbage. The system comprises a garbage incineration and flue gas treatment system, a combustion air system, a peculiar smell gas treatment system, a steam boiler system, a garbage leachate treatment system, and a garbage ash residue and flying ash treatment system. According to the system of the cement kiln for co-treatment of the household garbage, a garbage incinerator and a cement clinker production line are better combined together, the characteristics of high temperature, high stability, high-concentration alkaline materials, long standing time and the like of a cement firing system are utilized, dioxin-like harmful ingredients, garbage ash residues in garbage incineration flue gas, harmful elements and garbage leachate in flying ash and peculiar smell inside a garbage storage pit are perfectly and completely treated in a harmless mode, the environmental impact can completely meet the requirement of national standards, and the aims of harmlessness, volume reduction, recycling and environmental protection of household garbage treatment can be truly achieved. The system for the treatment of the household garbage is simple in flow path, easy and convenient to operate, stable in running, small in investment and ideal.

The invention provides a crankcase respiration apparatus for an internal combustion engine, which adopts the structure that a shell is internally provided with a labyrinth cavity used for filtering oil drops and a respiratory cavity communicated with the labyrinth cavity, wherein the respiratory cavity is connected with a ventilating pipe for gas exhaust by a respiratory part; the respiratory part is a respiratory valve which comprises a respiratory membrane, a central pipe, a spring and a spring base plate, the respiratory membrane is provided with an elastic skirt rim, the middle of the respiratory membrane is provided with a balancing hole, and the bottom surface of the respiratory membrane is provided with a protrusion which corresponds the end surface of the central pipe; a balancing cavity is formed between the respiratory membrane and a cover and the spring and the spring base plate are arranged between the respiratory membrane and a cover, and the respiratory membrane is heaved to start the respiratory valve for gas ventilation when the integral gas pressure of the inner side of the respiratory membrane is lager than the outer side pressure and the spring pretightening force. The invention effectively reduces the oil content of the exhausting gas of a crankcase and ensures that the crankcase obtains negative pressure by utilizing the inner pulsating pressure of a gas-intake pipe to control the intermittent opening and closing of the respiratory valve, the intense change of section areas among the cavities to lead to the air flow speed change and the triplex oil removing effect of a labyrinth passage, and the invention is also suitable for a multi-cylinder internal combustion engine.

The invention discloses an environment-friendly automatic paint spraying equipment and an application method thereof. The equipment comprises a rack, a paint spraying chamber, a drying chamber and automatic lifting rotation units; a feeding and discharging port is formed in the top of the drying chamber, and the two automatic lifting rotation units are located below the paint spraying chamber andthe feeding and discharging port respectively; multiple annularly-arrayed transmission rollers are arranged in the drying chamber; multiple trays are arranged on the transmission rollers; the transmission rollers intermittently rotate and drive the trays to intermittently move on the transmission rollers; the automatic lifting rotation units comprise lifting platforms and first air cylinders whichdrive the lifting platforms to vertically move; the lifting platforms comprise lower platforms and rotatable upper platforms, and multiple suction cups are arranged on the upper planes of the upper platforms. According to the environment-friendly automatic paint spraying equipment and the application method thereof, the equipment is provided with the paint spraying chamber and the drying chamberwhich are isolated from each other, a workpiece can be automatically sprayed and dried, and the equipment has the advantages of being simple in structure, good in spraying effect, high in spraying efficiency, environmentally friendly, safe and the like.

The invention discloses a domestic rubbish treatment system. The domestic rubbish treatment system comprises a hopper communicated with a feeding opening A of a smashing device. A discharging opening A of the smashing device is communicated with a feeding opening B formed in the upper portion of a fermentation chamber through a raw material conveying device. A discharging opening B formed in the bottom of the fermentation chamber is communicated with a feeding opening C formed in the upper portion of a drying chamber through a decomposed material conveying device. A discharging opening C is formed in the bottom of the drying chamber. By means of the domestic rubbish treatment system of the structure, domestic rubbish can be effectively treated into decomposed materials to form fertilizers, and secondary pollution generated by the domestic rubbish can be effectively prevented; and meanwhile, the height of a ventilation opening of the fermentation chamber is larger than that of an excrement trough, the negative pressure in the fermentation chamber is kept, and therefore peculiar smells sent from the domestic rubber entering the fermentation chamber can not be backwards fleed from the excrement trough.

The invention provides a high-pollution building space exhaust disinfection and purification system and method. The system comprises a pollution region negative pressure metal ventilation pipe, and any position of the pollution region negative pressure metal ventilation pipe is communicated to the inlet end of a high-resistance ventilation pipeline with a heat insulation and insulation layer. Theoutlet end of the high-resistance ventilation pipeline with the heat insulation and insulation layer is connected to the inlet end of an outdoor negative pressure metal ventilation pipe through an electric backflow prevention valve, and the outlet end of the outdoor negative pressure metal ventilation pipe is connected to an extraction opening of an efficient frequency conversion draught fan. A plurality of virus killing devices are sequentially arranged at the rear end of the efficient variable-frequency draught fan. By means of the system and method, air possibly containing viruses in a high-pollution building space is subjected to high-temperature disinfection and sterilization through an electric heating pipeline, then the air subjected to high-temperature disinfection and sterilization is guided to an outdoor multi-virus disinfection and sterilization device through the negative pressure pipeline to conduct diversified thorough disinfection and sterilization on the introduced air,and the viruses in the air in the high-pollution building space can be thoroughly removed.

The invention relates to a film evaporator which comprises a motor speed reducer, a material distributor, a rotor, a scraping plate, an evaporation tank I, an evaporation tank II and the like, wherein the rotor is driven to rotate through a motor after the rotation speed of the motor is reduced through the speed reducer; the scraping plate is driven to throw and adhere materials to the inner walls of the evaporation tanks so as to form films; the films on the inner walls can be heated through vapor passing through hollow positions between the inner and outer walls of the evaporation tanks, so that separation and concentration of the materials can be achieved. The film evaporator can be widely applied to industries such as chemical engineering, food and medicines, compared with a conventional film evaporator, the film evaporator has the characteristics that the energy consumption is small, the temperature of requested vapor is low, the purification rate is high, and the like, the production period is shortened, the production efficiency is improved, and the product quality is ensured.

The invention relates to a portable step-by-step water sample suction filtration system. The system comprises two filters, a guide pipe, a suction filtration bottle, a portable box, a first suck-press latex tube, a second suck-press latex tube and a third suck-press latex tube, wherein a corresponding water system micropore filtration membrane is arranged in each filter; the two filters are detachably communicated with upper and lower ports of the guide pipe in a sealed manner respectively; a vacuum pump and a storage battery for supplying electric energy to the vacuum pump through a power switch are placed in the portable box; one end of the first suck-press latex tube and one end of the second suck-press latex tube are detachably communicated with the guide pipe and the suction filtration bottle in a sealed manner, the other ends of the first suck-press latex tube and the second suck-press latex tube are joined and connected to the end part of the third suck-press latex tube communicated with the vacuum pump. By means of the suction filtration system, particle suspended matters/microorganisms with different particle sizes or pore sizes in a water sample can be separated on the field site, following research is met, and besides, the system can be used for collecting water samples filtered step by step.

The invention relates to a garment with a cooling function. The garment is internally provided with a steam-proof interlayer, wherein the interlayer is composed of an inner layer and an outer layer which can be separated; the interlayer is internally provided with air inlet hoses, and the two ends of the air inlet hoses are fixedly connected with the inner layer and the outer layer respectively, and the air inlet hoses can be bent and are provided with air outlet holes in the pipe walls, and can be used for outwards ejecting the outer layer; the interlayer is provided with an exhausting hole and a water discharging hole which are outwards formed, and check valves are arranged on the exhausting hole and the water discharging hole; the garment is further provided with a water storage bag, a water mist generator and an air blowing device; an air outlet pipe of the air blowing device is communicated with the air inlet hoses; a mist generation opening of the water mist generator is connected with the air outlet pipe of the air blowing device. The air blowing device is used for inflating the air inlet hoses in the interlayer, and the water mist generated by the water mist generator is conveyed to the interlayer through the air outlet pipe of the air blowing device. After the mist enters the air inlet hoses, the bent air inlet hoses are expanded to eject the outer layer, and the volume of the interlayer is rapidly expanded; the air and the water mist in the interlayer absorb heat (an expansion heat absorption principle) so that the effect of cooling a body surface of a wearer is realized.

A negative pressure hood comprises a hood body, an exhaust pipe and an exhaust purification device, the upper end of the exhaust pipe is arranged in the hood body, and the lower end of the exhaust pipe is connected with the exhaust purification device; the hood body comprises a hood shell, a neck limiting sealing belt, a shoulder and chest lower hem, a fixing belt of the shoulder and chest lower hem, a face transparent elastic air bag, an oxygen inlet pipe and two side transparent elastic air storage bags, the shell is supported at the periphery of the head of a transferred patient; the face elastic transparent air bag and the two side elastic transparent air storage bags are made of elastic thin film materials. The face elastic transparent air bags are positioned in front of eyes of the transshipment patient; the two lateral elastic transparent air storage bags are located on the outer sides of two ears of the transshipment patient respectively. When the patient wears the negative pressure hood and starts the air exhaust purification device to exhaust and filter air in the negative pressure hood, negative pressure can be kept in the negative pressure hood, and the negative pressure condition in the negative pressure hood can be displayed according to the sunken degree of elastic films of the face elastic transparent air bags and the two side elastic transparent air storage bags. The isolation effect is good, and the transfer cost is low.

The invention discloses a system for CDQ pressure control emitted gas desulfurization and dust removal, comprising a baking soda hopper, a screw conveyor, a baking soda grinder, a conveying fan, a primary dust remover, a desulfurization reactor, a secondary dust remover and a draught fan. The emitted gas is taken out of an emission port through a pipeline and firstly enters the primary dust remover to remove dust, and the dust-removed emitted gas and the ground baking soda ultrafine powder enter the desulfurization reactor through a Venturi pipe to be uniformly mixed and undergo a chemical reaction in the reactor. The desulfurized flue gas passes through the secondary dust remover and the draught fan and then enters a chimney to be discharged. By the principle of baking soda dry desulfurization and two-stage high-efficiency dust removal, SO2 and dust in the flue gas can be effectively removed to ensure that the treated flue gas meets the latest national special emission limit standard.

The invention relates to a gripping device for an end effector (2) of a manipulator (3) for retaining a workpiece (4) over the workpiece surface (5) of said workpiece, comprising a Bernoulli grippingunit (6), which has an outflow unit (7) for discharging a flow (SB) from the Bernoulli gripping unit (6) between the gripping device (1) and the workpiece surface (5) in such a way that a static negative pressure can be produced in a delimited region - the Bernoulli negative-pressure region (8) - by means of the flow (SB) in order to retain the workpiece (4), and comprising a vacuum gripping unit(9), which has a suction chamber (10), wherein a static negative pressure can be produced in a region delimited by the suction chamber (10) - the vacuum negative-pressure region (11) - in order to retain the workpiece (4), wherein the Bernoulli negative-pressure region (8) and the vacuum negative-pressure region (11) at least partially coincide or wherein the Bernoulli negative-pressure region (8)and the vacuum negative-pressure region (11) surround each other.

The invention relates to an abrasive wheel tank of a substrate glass grinder and a grinder. The abrasive wheel tank of the substrate glass grinder comprises a shell for containing an abrasive wheel. A glass channel which allows substrate glass to penetrate through horizontally is formed in the shell. The shell is further provided with a water inlet and a water spray port which points a grinding groove of the abrasive wheel. The water inlet and the water spray port communicate through an internal water path. The shell is further provided with a water suction port used for communicating with a negative pressure device, and the water suction port is an opening facing towards the glass channel. Through the technical scheme, the substrate glass enters the glass channel formed in the shell from one side of the glass channel so that the edges of the substrate glass can be grinded, cooling water is sprayed to a grinding area of the abrasive wheel via the water inlet, the internal cavity path and the water spray port so as to wash away impurities generated when the substrate glass is grinded by the abrasive wheel, the cooling water flows out from the water suction port finally, the grinding quality of the substrate glass cannot be affected, and normal operation of the grinding procedure is ensured.

The invention relates to a negative-pressure indicating drainage bottle which comprises a bottle body, wherein measurement scale lines are formed on the front surface of the bottle body, mounting bases are respectively arranged in the middle parts of the front surface, the back surface, the left side and the right side of the bottle body, hanging rings are arranged on the upper sides of the mounting bases, a bottle cap is arranged on the upper side surface of the bottle body, a vacuum indicator, a drainage opening and an extraction opening are arranged on and formed in the bottle cap in sequence from left to right, the drainage opening is connected with a drainage tube through a Ruhr connector, a reflux valve is arranged in the middle of the drainage tube, a tube clamp is arranged on the end of the drainage tube, a check valve is arranged on the upper end of the extraction opening, an extraction chamber is arranged outside the extraction opening, a connecting tube is connected to the right end of the extraction chamber, and a minipump is connected to the other end of the connecting tube. The negative-pressure indicating drainage bottle has the advantages of simple structure, safety, accuracy, good use effect and strong practicability.

The invention discloses a pulverized coal preparation system and a pulverized coal preparation method. The pulverized coal preparation system comprises a heat source device, a drying device, a pulverizing device, a powder colleting implement, an air blower, a bag-type dust collector and an induced draft fan. The smoke outlet end of the drying device is connected with the smoke inlet end of the bag-type dust collector. The smoke outlet end of the bag-type dust collector is connected with the induced draft fan. Dry raw materials of the drying device are fed into the pulverizing device. a closed grinding circulatory system is formed among the pulverizing device, the powder colleting implement and the air blower. The pulverized coal preparation system further comprises a balance air pipe. The outlet end of the air blower is then connected with the smoke inlet end of the bag-type dust collector through the balance air pipe. According to the pulverized coal preparation system and the pulverized coal preparation method, full negative pressure running of a system air leak position is achieved, and accordingly the purpose of clean production is achieved. The temperature of powder collected by the bag-type dust collector is lowered, and the possibility of powder spontaneous combustion and explosion is reduced, so that the safety performance of the pulverized coal preparation system is significantly improved. Compared with the traditional process, the number of equipment and sites are reduced, and the cost is reduced.

The invention belongs to the related technical field of energy conservation and emission reduction of engines, and discloses an experimental device for fuel combustion and soot generation characteristics under microwave radiation. The experimental device comprises a high-voltage power supply, a signal generator, a magnetron, a tuner, a combustion chamber, an axial flow combustor and a capillary tube, the magnetron is used for generating microwaves, and the tuner is used for adjusting impedance in a circuit; the combustion chamber is a closed metal cavity; the axial flow combustor is used for generating axial flame in the combustion chamber; the capillary tube is arranged in the flame, small holes are formed in the capillary tube, substances in the flame at the position of the capillary tube are sucked into the small holes under the action of negative pressure and then enter a gas analyzer, components of the substances in the flame are obtained under the analysis of the analyzer, the position of the capillary tube in the flame is adjusted, the analysis of combustion products at different positions is achieved, and the comprehensive detection of the combustion products is achieved. By means of the device, the detection of the intermediate product in the combustion process is achieved, and the device is easy to operate, capable of saving energy, environmentally friendly, safe andreliable.

The invention relates to a universal dispenser, which is characterized in that a glue output head and a pressure gage are arranged at the front end of a casing; a glue output pressure regulating valve and a time relay are arranged at the upper end of the casing; an air source inlet, a power line, a glue output air flow regulating valve, a vacuum flow regulating valve and a power switch are arranged at the rear end of the casing; the air source is connected with an air source inlet; an air tube is arranged between the air source inlet and the glue output head; the glue output pressure regulating valve, the pressure gage, the glue output air flow regulating valve and an electromagnetic valve are arranged on the air tube between the air source inlet and the glue output head sequentially; the air source, the time relay and the electromagnetic valve are all controlled by the power switch. The universal dispenser is applicable to all products in need of glue dispersion, the glue dispersion amount can be accurately controlled, and the uniformity and consistency of glue dispersion can be guaranteed.

The invention discloses a scanning type efficient purifying and return air collecting device, and relates to the technical field of air filters. According to the structure of the scanning type efficient purifying and return air collecting device, a biological safety valve is installed at the top of an air port box body, and a centrifugal fan is fixed to the bottom of the biological safety valve; the left side of a negative pressure meter monitor is provided with a pipeline A and a pipeline B, the pipeline A is connected with the centrifugal fan, and the pipeline B is connected with an air filter; the air filter is installed at an indoor scanning air port; a scanning mechanism conducts regular leakage detection on the air filter through a scanning driving motor; and an air collecting coveris installed on the periphery of the air filter through sealing pressing plates and subjected to height adjusting through an air collecting cover lifting mechanism. The scanning type efficient purifying and return air collecting device has the beneficial effects that scattering of infectious matter aerosol generated in the class A infectious germ freeze-drying experiment process is effectively reduced, the infection risk of experimenters in the freeze-drying process is reduced, the problem that experimenters cannot do infectious experiment activity in a biological safety cabinet is solved, andthe life safety of the experimenters is effectively ensured.

The invention provides a water valve and a water dispenser. The water valve comprises a water valve base, a water outlet body and an elastic assembly. The water outlet body is embedded in the water valve base and can axially reciprocate relative to the water valve base. The water outlet body is provided with a valve element. The elastic assembly is arranged between the water valve base and the water outlet body and arranged outside the valve element in a sleeving mode. One end of the elastic assembly is connected with the water valve base, and the other end of the elastic assembly is connected with the water outlet body. When the water valve is in a water-releasing state, the elastic assembly is compressed; when the water valve is in a non-water-releasing state, the elastic assembly is released to generate negative pressure and suck back residual water in the water valve. According to the water valve, when the water dispenser is switched from the start state to the stop state, the elastic assembly is released to recover the before-deformation state from the compression deformation state to generate negative pressure and suck the residual water in the water valve back into the water valve under the effect of atmospheric pressure, and therefore the residual water in the water valve can not drop out, and it is ensured that when the water valve of the water dispenser is switched off, water flow instantly stops.

A main body and grate unit of life garbage incinerator features that its grate unit is divided into left, central and right subgrates, said left and right subgrates have drive chain wheels fixed to the drive axle for directly driving them, the drive chain wheel of central subgrate is fixed to the sleeve axle arranged in central part of drive axle and is driven by secondary drive axle via gear, chain wheel and chain, and a differentiating movement between left-right subgrates and central subgrate is formed for high combustion speed and full combustion of garbage. Said main body is composed of feeder, base, furnace body, blower and dreg crusher besides said grate unit.