17443 results about "Air pump" patented technology

A material removal system includes a collection conduit having a distal end that is positionable adjacent particulate material. A primary particle separator system connected to the collection conduit separates quantities of particulate material entrained in an air stream. A secondary particle separator system connected to an outlet of the primary particle separator system separates additional quantities of particulate material entrained in an air stream exiting the primary particle separator system. An air pump connected to an outlet of the secondary particle separator system creates an airflow through the collection conduit and the primary and secondary particle separator systems. A conveyor system operatively associated with material discharge ports of the primary and secondary particle separator systems collects separated particulate material from the material discharge ports of the primary and secondary particle separator systems and transports the separated particulate material to a material discharge end of the conveyor system.

The invention relates to the technical field of gas detection, in particular to a multi-gas accurate detection method and system.The method comprises the following steps that gas to be detected flows through a miniature gas enrichment device prepared through an MEMS technology under driving of a miniature gas pump, and target gas is adsorbed and enriched through graphene and metal oxide composite sensitive materials on the surface of a spiral gas inlet flow channel in the miniature gas enrichment device; the desorption concentrated gas is heated to the multi-gas composite detector, and the sensor array reacts with the gas to generate an electric signal; the data acquisition unit performs noise reduction, amplification and analog-to-digital conversion preprocessing on the electric signal; the data processing unit extracts characteristic vectors such as a response curve peak value and a rising slope; inputting the feature vector into a pre-trained machine learning classification-regression combined model, and outputting a gas type identifier and an initial concentration; error compensation is carried out in combination with environment temperature and humidity and a cross sensitivity interference mode library, and finally accurate information of at least nine gases is output. The device has the advantages of high sensitivity, strong anti-interference performance and miniaturization.

The invention relates to the technical field of automobile seats, and discloses an automobile seat with a kneading massage function, the automobile seat with the kneading massage function comprises a seat body and a massage module arranged on the seat body, the massage module comprises a lower base plate, an upper base plate and an air pump, the lower base plate and the upper base plate are each provided with a plurality of massage actuators and an electromagnetic valve used for controlling on-off of an air path. According to the scheme, the efficient mechanical impact structure percussion plate and the telescopic rod are fused in a pneumatic system, and the mode that the air pump is used for rapidly vacuumizing and then instantly releasing is adopted, so that short, strong and impact deep finger-pressing type percussion massage which is difficult to achieve by a traditional pneumatic scheme is achieved; the defect that an existing product is insufficient in massage strength is effectively overcome, and the problems of muscular soreness after strenuous exercise and body stiffness caused by long-time driving are effectively relieved.

The invention discloses a feeding manipulator for petroleum drill rod joint production, and belongs to the technical field of feeding manipulators, the feeding manipulator comprises a mechanical operation arm, two mechanical operation claws are arranged at the free end of the mechanical operation arm, and each mechanical operation claw comprises two clamping claw pieces symmetrically arranged on an output shaft of the mechanical operation arm; a stabilizing assembly with a stabilizing part is arranged in the clamping jaw part, the stabilizing part comprises a main air bag which is arranged in the clamping jaw part and used for improving uniform clamping pressure, an air pump is arranged at the top end of the clamping jaw part, and an inflation part is installed between the output end of the air pump and the main air bag in a communicating mode. The main air bag is arranged in the clamping jaw piece, the internal main air bag can be inflated and expanded to fill gaps between the clamping plates and workpieces, the clamping jaw piece can adapt to the workpieces of different shapes and sizes, the elastic material can absorb clamping impact force, the rigid clamping plates are prevented from making direct contact with the surfaces of the workpieces, pressure is evenly distributed after inflation, local stress concentration is prevented, and the clamping jaw piece can be used for clamping workpieces of different shapes and sizes. And the clamping stability is improved.

The invention provides a vehicle interior laser cutting machine tool, and relates to the technical field of laser cutting machine tools, the vehicle interior laser cutting machine tool comprises a cutting table and a laser cutting head, the middle of the cutting table is hollow, a drawer type waste tray is movably inserted in the cutting table, one end of the cutting table is fixedly provided with a dust collector, and the other end of the cutting table is fixedly provided with an air blowing pump; shunting seats are fixedly mounted on the two sides of the cutting table, a plurality of dust collection holes are formed in the two side walls in the cutting table at equal intervals, cavities used for collecting dust are formed in the two side walls in the cutting table, and the output end of the dust collector is fixedly communicated with the two cavities in the cutting table; the adjusting assembly is installed at the top of the cutting table and used for adjusting the position of the laser cutting head, and the bearing sets are installed on the cutting table at equal intervals and used for containing the vehicle interior trim panel. According to the laser cutting machine tool, the sealing windshield is driven to be opened and closed through the rollers in the adjusting assembly, the purpose of air duct follow-up switching is achieved, and the laser cutting machine tool has the excellent cleaning capacity for kerfs of a to-be-cut piece.

The invention relates to the technical field of optics, in particular to a gas concentration regulation and control interference imaging system applied to shape righting of a nozzle handle, a shape righting tool and a nozzle are prepared, the shape righting tool is provided with a downward pressing mechanism, the downward pressing mechanism is provided with a downward pressing telescopic column for correcting the nozzle handle, and a displacement measurement interferometer system is assembled on the shape righting tool; the displacement measurement interferometer system is provided with a reflecting movable mirror and a beam splitter, and the reflecting movable mirror is mounted on the pressing telescopic column; the displacement measurement interferometer system further comprises an interference light path stroke difference fine tuning system. The interference light path stroke difference fine adjustment system comprises a glass container for containing sulfur hexafluoride, the end faces of the two ends of the glass container are flat and transparent, the glass container is arranged on a light path between the beam splitter and the reflective moving mirror, and the end faces of the two ends of the glass container are perpendicular to laser on the light path; the glass container is provided with an air supply port; the air supply port is connected to an air pump, and the air pump is connected with a sulfur hexafluoride air source. And the shape correcting position of the nozzle handle is accurately controlled.

Systems and methods are provided for a portable air compressor comprising an electric battery, an electric motor, a piston, and an air hose. The electric motor is powered by the electric battery. The piston is coupled to and driven by the electric motor. The piston is configured to compress air within a piston cylinder. The air hose has a first end attachable to an air outlet of the piston cylinder and a second end attachable to an inflatable object. The portable air pump is configured to inflate the inflatable object to a target air pressure. When the target air pressure is below a predetermined pressure threshold, the portable air pump inflates the inflatable object at a first inflation rate. When the target air pressure is above the predetermined pressure threshold, the portable air pump inflates the inflatable object at a second inflation rate greater than the first inflation rate.

The invention discloses a graded detection method and system for an air-breathing smoke-sensing fire in a complex environment, and relates to the technical field of fire-fighting early warning, and the method comprises the steps: recognizing a ventilation opening of a monitoring region in the complex environment, and arranging air-breathing smoke-sensing equipment on the ventilation opening; state monitoring is conducted on the ventilation opening, and working mode parameters of the ventilation opening are obtained and comprise the ventilation starting and stopping state, the wind speed and the ventilation direction; and analyzing to obtain a self-adaptive strategy matched with the working mode parameters to control the sucking pump to drive the air-breathing smoke sensing equipment to collect smoke gas samples, performing multi-time sequence grading detection, and outputting a fire early warning signal. According to the invention, the technical problem that the existing fire detection technology is difficult to accurately collect smoke samples and give out early warning in time in places with complex ventilation structures and obvious air disturbance is solved, and the air-breathing smoke sensing equipment is arranged at the ventilation opening and the sampling strategy is dynamically adjusted; and the accuracy of smoke collection and the real-time performance of fire early warning are improved.

The invention relates to the field of medical instruments, in particular to a marine war wound hemostasis fixing device which comprises a framework, a hemostasis module, a fixing module and an intelligent monitoring module are mounted on the framework, the framework comprises a plurality of angle-adjustable split arc-shaped assemblies, and the arc-shaped assemblies are connected in series through flexible connecting pieces; the hemostasis module comprises a gradient pressure air bag assembly, the gradient pressure air bag assembly comprises a central pressurizing bag and a peripheral stabilizing bag, the gradient pressure air bag assembly is communicated with a multi-stage air pump assembly, and the multi-stage air pump assembly is installed on one side of the framework; the intelligent monitoring module comprises a controller, an acceleration sensor, a pressure sensor, a microwave blood flow sensor and a biological impedance monitoring electrode, and the multistage air pump assembly, the acceleration sensor, the pressure sensor, the microwave blood flow sensor and the biological impedance monitoring electrode are all in signal connection with the controller. The invention aims to overcome the defects in the prior art, and provides an efficient, reliable and intelligent solution for maritime war wound first aid.

The invention discloses a temperature compensation method and system, and the method comprises the steps: receiving a valve block temperature signal collected by a temperature sensor integrated with a pressure sensor in a closed gas supply unit, and an electronic element temperature and environment temperature signal collected by a temperature sensor on a control unit PCB, generating an initial temperature-working condition data set by combining the power of the air pump and the working duration of the electromagnetic valve; performing thermal resistance network modeling on the initial temperature-working condition data set, constructing a multi-node thermal characteristic matrix, and decomposing the matrix into a plurality of sub-matrixes; performing real-time operation on the sub-matrix by using a dynamic heat balance algorithm to generate a temperature estimation result of the key component; and generating a temperature compensation control instruction according to the temperature estimation result of the key component. According to the embodiment of the invention, the temperature of the key component can be accurately estimated, dynamic compensation is realized, and the control precision and stability of the closed gas supply unit are improved.

The invention relates to the technical field of power electronic driving control, in particular to a driving system and method for an ultrasonic air pump, and the system comprises a control signal generation module which is used for generating a control signal; the voltage superposition driving module is coupled to the control signal generation module and is used for superposing and lifting the driving voltage according to the control signal and executing reversing operation, and the reversing operation comprises forward driving and reverse driving; the driving frequency adjusting module is coupled to the control signal generating module and is used for adjusting the driving frequency and speed of the ultrasonic air pump based on the control signal; and the working circuit protection module is coupled to the voltage superposition driving module and is used for setting dead time between forward driving and reverse driving to prevent short circuit. According to the invention, the dependence of the ultrasonic air pump on an independent high-voltage power supply and how to realize high-voltage alternating driving through voltage superposition and avoid the risk of bridge arm direct connection and resonance mismatch under the constraint of a low-voltage power supply are effectively solved.

The disclosure relates to the technical field of air pumps, and particularly relates to an air pump having a reminding function. The air pump includes a pump cylinder provided with a first hollow cavity and a push rod assembly that is pullable. The push rod assembly is movably inserted into the pump cylinder. The air pump further includes an air pressure sensor and a reminding mechanism. The air pressure sensor and the reminding mechanism are both mounted in the pump cylinder or the push rod assembly. The air pressure sensor is connected with the reminding mechanism. An objective of the disclosure is to solve a problem that an existing manual air pump cannot give a reminder when air extraction is completed, and provide an air pump having a reminding function when air extraction is completed.

The buried person search and rescue device comprises a portable drilling machine, the portable drilling machine is provided with a plurality of hollow drill rod sleeves, a gas conveying channel used for conveying gas to the ground is arranged in a drill rod, and a gas outlet of the gas conveying channel is connected with a sampling gas inlet of a gas component analysis device through a gas conveying pipe. A gas purifying and filtering device and a gas extracting pump for extracting gas are connected to the gas conveying pipe in series; a plurality of air inlets communicated with the air conveying channel are formed in the side wall of each drill rod sleeve in a surrounding mode, a jet flow nozzle is arranged at each air inlet in the drill rod sleeve, each jet flow nozzle is installed at an outlet of an injection pipe, each injection pipe is connected with an electromagnetic valve in series, and an inlet of each injection pipe is connected with the jet flow pipe. The invention aims to provide the device for searching and rescuing the buried persons, which can remarkably improve the search and rescue efficiency and effect in a complex geological disaster scene, and further realize the rapid search and rescue of the trapped and buried persons in earthquake, landslide and debris flow disasters and the search and rescue of the remains of the victims.

The invention provides a blood pressure measurement system and method based on multi-airbag cooperative control and oscillatory wave analysis, and relates to the technical field of medical instruments. Comprising an integrated cuff cover body, an inflator pump, an electromagnetic valve, a pressure balancing device and a microprocessor, a first air bag, a second air bag and a third air bag are arranged in the integrated cuff cover body, firstly, an inflation pump is started, the multiple air bags are synchronously inflated to preset initial pressure, then a first air bag electromagnetic valve and a third air bag electromagnetic valve are closed, a pressure balance device dynamically adjusts a miniature deflation valve, and the pressure in the first air bag and the pressure in the third air bag are kept constant; the inflator pump continues to inflate until the pressure in the second airbag is higher than the systolic pressure level; the measuring method specifically comprises a multi-air-bag pressure measuring mode and a double-air-bag pressure measuring mode. The multi-air-bag pressure measuring mode is that three air bags are used for measuring pressure at the same time, and the double-air-bag pressure measuring mode is that only the second air bag and the third air bag are pressurized, so that blood pressure measurement is achieved.

The invention discloses a ship underwater welding seam quality detection device, and relates to the technical field of ship welding seam detection, the ship underwater welding seam quality detection device comprises a detector, a gooseneck pipe, a pipe body limiting assembly, an end part frame, a clamping and fixing assembly and a detection unit, the top end of the detector is provided with a receiving end, and the detection unit is fixed below the end part frame. Comprising a camera body, an illumination lamp and a protective shell. The camera body is fixed below the gooseneck, and a transmitting end is arranged at the top of the camera body; the illumination lamp is fixed on the camera body; the protective shell is of a hollow capsule structure and is fixed on the outer side of the camera body, the protective shell is made of a transparent silica gel material and is communicated with an external air pump through a pipeline, and the camera body is protected through inflation expansion and contraction; the technical effects that the detection range is expanded, the equipment damage risk is reduced, the detection efficiency is improved, and the detection accuracy is improved can be achieved.

The invention provides an airborne self-adaptive photovoltaic cleaning device and a cleaning pressure adjusting method thereof, and the device comprises a cleaning load module which comprises a water tank, a high-pressure spray head, a spray rod and an air pump; the laser locator is used for emitting laser to locate the cleaning position; the camera is arranged on the unmanned aerial vehicle; the airborne edge control terminal is used for collecting flight state data of the unmanned aerial vehicle and operation data of the cleaning load; the control circuit module is used for adjusting the water outlet pressure, the water outlet mode and the nozzle orientation; the cleaning management platform is used for monitoring and early warning the dust accumulation state of the photovoltaic module; the photovoltaic module dust deposition early warning system is used for providing dust deposition quantitative data; by integrating the cleaning management platform and the cleaning device, comprehensive automation and intelligentization of photovoltaic module cleaning work are achieved, compared with a traditional manual cleaning mode, the cleaning efficiency is greatly improved, dependence on manpower is reduced, and the cleaning device is particularly suitable for operation and maintenance cleaning work of large-scale and complex-terrain photovoltaic power stations.

The invention relates to the related technical field of dust detection, and provides a mining induced charge and light scattering fusion dust detection device and method.The dust detection device comprises a workbench, a sampling assembly and a detection assembly, and the sampling assembly comprises a sampling air pump, a conical airflow homogenizer and a closed sampling cavity; the detection assembly comprises an annular sliding rail, a light scattering detection module and an electrostatic induction detection module; the dust detection method comprises the following steps: S1, device initialization and zero calibration; s2, sampling preparation of dust-containing airflow; s3, dual-module synchronous signal acquisition; s4, data processing and temperature and humidity compensation; s5, carrying out anti-interference protection assembly; and S6, data fusion and result output. S7, device cleaning and standby; through cooperative work of the double detection modules, dust detection signals in different concentration intervals are accurately captured, wide-range coverage from low concentration to high concentration is achieved, and synchronous monitoring of dust concentration and particle size characteristics is achieved.

The present invention provides a vacuum air extraction device with high practicality and reliability. The vacuum air extraction device with high practicality and reliability includes an air extraction host machine and a vacuum sucker in matching connection to a lower part of the air extraction host machine, where a control circuit board, a vacuum air pump and a decompression valve are arranged in the air extraction host machine; an annular groove body is formed in one end connected to the air extraction host machine, of the vacuum sucker; a spongy body for filtering air is arranged in the annular groove body; air extracted through the air extraction host machine passes through the air circulation channel to enter the annular groove body, is filtered at the spongy body, and then flows into the vacuum air pump.

The invention discloses a recovery device and reutilization method for silicon in a waste photovoltaic module, the recovery device comprises an equipment base, an acid pickling recovery pool, a circulating liquid washing mechanism and a clamping seat, the acid pickling recovery pool is fixedly installed on the surface of the equipment base, a high-pressure air pump is fixedly installed on one side of the equipment base, and the high-pressure air pump is fixedly installed on the other side of the equipment base; an aerator communicated with the output end of the high-pressure air pump is arranged on the bottom face of the acid pickling recycling pool, a liquid injection end pipe and a circulation pipeline are arranged on the top face and one side of the acid pickling recycling pool respectively, and the circulation liquid washing mechanism is fixedly installed on the inner side of the acid pickling recycling pool. According to the invention, the automatic ultrasonic pickling structure is arranged, the pickling recovery pool is used for filling the chemical solvent, the cavitation effect is formed on the surface of the silicon wafer carried by the pickling solution through ultrasonic oscillation in solvent pickling, the silicon wafer and EVA are separated, more than 99% of polymer is removed from the PV module, and the processed silicon wafer is good in integrity; the silicon wafer is almost free of fracture damage, and the recovery value is improved.

The present invention discloses an evaporator for an automobile air-conditioner, which relates to the technical field of automobile air-conditioning, and comprises a supporting outer frame and an evaporator body, wherein the evaporator body is fixedly connected to the interior of the supporting outer frame, and the internal top wall of the supporting outer frame is fixedly connected to two diversion boxes, and the outside of the diversion box is fixedly connected to a plurality of blocking and shrinking airbags, and the supporting outer frame is fixedly connected to the micro air pump, and the air outlet of the micro air pump is connected to an air supply hose. When the plurality of blocking and shrinking airbags continue to expand laterally, the evaporator body can be sealed in a separate space in cooperation with the supporting outer frame, so that the evaporator body is no longer in contact with the outside air when not in use, thereby reducing the phenomenon that dust in the outside air adheres to the louver fins of the evaporator body, and the plurality of blocking and shrinking airbags filled with gas are lighter in overall weight, thereby reducing the burden on vehicle operation.

The invention relates to the technical field of microbial culture, and provides a culture device for agricultural microbial agent production and a use method, the culture device comprises a culture box, and the top of the culture box is hermetically and detachably provided with a box cover. According to the device, the air pump is controlled by the controller to be started, so that the air pressure in the closed space is increased, the air passes through the non-woven fabric and the polymer microporous membrane, more tiny bubbles can be generated under the action of the polymer microporous membrane, a nutrient solution flows and is mixed, and the stirring effect on the nutrient solution is achieved; a nutrient solution in the incubator flows into the culture dish through the liquid discharge pipe, so that the stirring of the nutrient solution and the injection of the nutrient solution into the culture dish to be mixed with a microbial inoculum can be completed without using more structural components, the operation is simple, and the condition of pollution caused by improper cleaning is avoided; therefore, the subsequent microbial agent culture effect is improved.

A municipal road bridge crack detection device disclosed by the present invention comprises a protection positioning mechanism, the protection positioning mechanism comprises an outer protection box, the inner side of the outer protection box is provided with a cleaning detection mechanism, and the rear side of the top of the outer protection box is fixedly provided with a high-pressure air pump by forming an opening. The front side of the top of the outer protection box is fixedly provided with a slope concave frame by forming an opening. According to the crack detection device for the municipal roads and bridges, a protection positioning mechanism and a cleaning detection mechanism are combined for use, and the protection positioning mechanism and the cleaning detection mechanism can be locked during transportation and storage by utilizing linkage between driving matching structures of an air cylinder through the arrangement of the two mechanisms; when the device is used, unlocking is carried out, so that all the devices are unfolded, and the unfolded air pipe frame and the unfolded high-pressure spray head can be used for rapidly carrying out high-pressure cleaning on the crack.

The invention discloses atomic layer deposition equipment and a deposition method, and the atomic layer deposition equipment comprises a reaction cavity; the first end of the main gas inlet pipeline is communicated with a reaction gas source, and the second end of the main gas inlet pipeline is communicated with the reaction cavity; the first end of the pressure control pipeline communicates with the main air inlet pipeline, and the second end communicates with the air pump; the first end of the inert gas pipeline is communicated with an inert gas source, and the second end is communicated with the reaction cavity; the first end of the exhaust pipeline is communicated with the reaction cavity, and the second end is communicated with the air pump. When the atomic layer deposition equipment introduces the reaction gas into the main gas inlet pipeline, the pressure in the pressure control pipeline is controlled to be greater than the pressure in the reaction cavity, so that the pressure of the reaction gas in the main gas inlet pipeline is rapidly increased in a short time, and the reaction gas is pressed into the reaction cavity and adsorbed on a substrate.

The utility model discloses a material taking and placing tool for optical lens processing, which comprises a workbench, one side of the workbench is provided with a positioning base in a bolting way, the upper part of the positioning base is rotatably provided with a mounting seat, the lower part of the mounting seat is movably provided with a mounting disc, the bottom of the mounting disc is communicated with a sucking disc, and the sucking disc is provided with a clamping groove. And an air pump is bolted at the upper part of the mounting seat corresponding to the sucker. The purposes of air suction and air supply are achieved through work of an arranged air pump according to the use condition of a suction cup, so that the purposes of grabbing and placing the optical lens are better and more accurately achieved, the purpose of discharging during optical lens machining is achieved, meanwhile, the surface of the optical lens is cleaned through a cleaning brush installed at the bottom of a first cleaning base, and the cleaning efficiency is improved. And meanwhile, the mounting base is rotated to enable the position, corresponding to the water supplementing cylinder, of the suction cup to be pressed downwards, the water supplementing cylinder makes contact with the cleaning sponge to complete cleaning work on the suction cup, and the adsorption strength of the suction cup to the optical lens can also be kept.

The invention relates to the technical field of automobile inflator pump monitoring, and discloses an automobile inflator pump and a dynamic voltage monitoring control system thereof. The system comprises a voltage data acquisition module, a dynamic noise suppression module, a voltage fluctuation modeling module, a self-adaptive compensation control module and the like. The voltage data acquisition module acquires and processes multi-dimensional data, the dynamic noise suppression module removes noise, the voltage fluctuation modeling module extracts voltage and load correlation characteristics, and the adaptive compensation control module optimizes control parameters to stabilize the voltage. In addition, the system is further provided with a digital twinborn simulation module monitoring gas circuit, a distributed updating module optimization model based on federated learning, a redundancy protection circuit guarantee safety, and a fault mode library for providing preventive maintenance suggestions. The system can improve the running stability, safety and efficiency of the automobile inflator pump, and effectively overcomes the defects of a traditional inflator pump in the aspects of voltage monitoring control and the like.

The invention relates to the technical field of emotional robots, and discloses an embracing emotional robot which comprises an inner shell, low-cost and high-simulation breathing simulation is achieved through cooperative control of an air pump and an air valve, and the embracing emotional robot is designed by combining simulation body temperature brought by a heating piece and synchronous action of a rotatable arm. The emotion robot can naturally rotate forwards when being embraced and is matched with simulated respiration and simulated body temperature, so that the immersion and emotion interaction experience of a user are remarkably improved; the operation cycle of the air pump strictly follows biological breathing characteristics, the inspiration stage accounts for 2 / 3 of the breathing cycle, the speed of the inspiration stage changes fast and slow, the expiration stage accounts for 1 / 3 of the expiration stage, smooth pressure relief is achieved through the air valve, and the highly-simulated breathing mode can effectively guide a user to breathe synchronously, so that parasympathetic nerves are activated, the anxiety level and heart rate fluctuation are reduced, and the user experience is improved. And the whole structure adopts a modular design, complex functions such as breathing simulation, embracing and body temperature simulation can be realized, the maintenance is convenient, and the device is particularly suitable for long-term accompanying scenes.

The invention discloses a switchable graded sampling pre-construction control method for dust and a detection device. The method comprises the following steps: synchronously acquiring data through multiple types of sensors, constructing a condensation risk prediction model, calculating a condensation risk index RI and dividing risk grades; based on the risk level, dynamically adjusting the target power of the heating wire, the blowback period of the air pump and the airflow speed, and cooperatively triggering an electrode cleaning and trapping filter screen switching program; after cleaning is completed, follow-up control parameters are dynamically adjusted; and closed-loop control is formed. According to the method, the temperature and humidity sensor is arranged in the external environment to obtain background parameters, the airflow velocity sensor is used for sensing the working condition change of the air pump, and a dynamic condensation risk prediction model is established, so that excessive heating is avoided fundamentally, and evaporation loss of semi-volatile substances is prevented; therefore, the accuracy of a dust concentration detection result is remarkably improved in an extreme humidity environment.

The invention discloses a vacuum pumping system and method. The vacuum pumping system comprises a cavity, at least one low-vacuum pumping pump set, at least one high-vacuum pumping pump set, a first pipeline and a second pipeline, and the low-vacuum pumping pump set communicates with the cavity through the first pipeline and the second pipeline; the low-vacuum air extracting pump set is communicated with the cavity through a first pipeline, the high-vacuum air extracting pump set is communicated with the cavity through a second pipeline, the controller is electrically connected to the low-vacuum air extracting pump set and the high-vacuum air extracting pump set, the controller sequentially controls on-off of the low-vacuum air extracting pump set and the high-vacuum air extracting pump set, and the low-vacuum air extracting pump set can extract pressure in the cavity to be lower than 0.1 Torr; the system comprises a low-vacuum air extracting pump set and a high-vacuum air extracting pump set, and the low-vacuum air extracting pump set and the high-vacuum air extracting pump set can be used for extracting the pressure in the cavity to be lower than 0.1 Torr and the pressure in the cavity to be in an ultrahigh vacuum state respectively. The grading air exhaust mode can more effectively improve the air exhaust efficiency and reduce the air exhaust time; and the equipment can be prevented from being in a high-load state for a long time, so that the service life of the equipment is prolonged.

The invention relates to the technical field of environment monitoring instruments, and discloses a multi-gas detection mine environment monitoring instrument, which comprises a gas extraction type composite gas monitoring instrument, and further comprises a protection box arranged outside the gas extraction type composite gas monitoring instrument, used for protecting the gas extraction type composite gas monitoring instrument and made of austenitic stainless steel, the probe is arranged at the top of the air exhaust type composite gas monitor, the fixed pipe is communicated with the top of the protection box, the top of the probe is located in the fixed pipe, the guide pipe is connected with the top of the fixed pipe through a flange, and the air exhaust pipe is connected with the other end of the guide pipe through a flange. Through double filtration of the dustproof net and the dust-sticking paper, large-particle dust is intercepted by the dustproof net, fine dust is adsorbed by the dust-sticking paper on the inner wall of the circular truncated cone body, and dust accumulated in a pipeline is discharged through a gap between a baffle and a mounting sleeve through regular blowing of an air blowing pump of the dust removal assembly, so that the dust is prevented from adhering to a probe to block an air path; and the monitoring data accuracy is improved.

The invention discloses a double-layer aeration system for preventing wire breakage and sludge deposition of an MBR double-layer component membrane pool, which comprises a raw water pool, a raw water inlet peristaltic pump, an MBR double-layer component membrane pool, a perforated aeration pipe, a pulse aeration box, an aeration pump, a gas meter, a water outlet gear pump, an ultrafiltration membrane component, a pressure sensor, a transmembrane pressure difference display, a sludge discharge peristaltic pump and a water outlet pool, the MBR double-layer assembly membrane pool comprises a first MBR membrane assembly and a second MBR membrane assembly, the first MBR membrane assembly and the second MBR membrane assembly are arranged in parallel, and the perforated aeration pipe and the pulse aeration box are configured to be used as aeration assemblies of the first MBR membrane assembly and the second MBR membrane assembly. According to the invention, the membrane is physically scrubbed by utilizing different aeration modes and a double-layer aeration mode, so that the phenomena of membrane pollution, sludge accumulation and wire breakage are effectively relieved, a reliable theoretical basis is provided for transforming an MBR membrane tank into a double-layer aeration mode in a water purification plant using the MBR hollow fiber membrane, and meanwhile, the method has important significance on reducing pollution and carbon.