284results about How to "Speed up the flow" patented technology

In a construction machine comprising an engine, hydraulic device, and heat exchanger for cooling the engine and the hydraulic device, which are all disposed in an upper rotating body of the construction machine, there is formed a maintenance passage along which maintenance portions of the engine and the hydraulic device are disposed so as to cross the upper rotating body. Exhaust air from cooling fans for sending air to the heat exchanger is discharged to the exterior of the machine body through the passage. Thus, the passage is utilized as an exhaust air passage for the heat exchanger, whereby it is possible to provide a construction machine improved in cooling efficiency for the heat exchanger.

The invention relates to a scalpel cleaning and disinfecting device, in particular to an efficient cleaning and disinfecting device for a medical scalpel handle. The efficient cleaning and disinfecting device for the medical scalpel handle is low in manufacturing cost, easy to operate and high in working efficiency. In order to achieve the technical purposes, the efficient cleaning and disinfecting device for the medical scalpel handle comprises a support shaped like an Arabic number '7', an installing base, a rack, an electric cam, a first pulley, a gear, a connecting rod, guide sleeves, a hose, a sprayer, a concentric-square-shaped frame, movable rods, an air cylinder and the like. The guide sleeves are vertically arranged on the top of the inner side of the support shaped like the Arabic number '7' in a bilateral symmetry mode, the movable rods are connected into the guide sleeves in a sliding mode, and the rack is arranged on the left side of the movable rod on the left side. According to the efficient cleaning and disinfecting device for the medical scalpel handle, when the scalpel handle is cleaned, the sprayer continuously sprays disinfectant to the scalpel handle.

An air-conditioned seat cushion includes a flexible seat cushion body bendable to fit a car seat and having a flexible flat fan mount forwardly extended from the front open side thereof and multiple air channels and air holes for ventilation, a fan affixed to the flexible flat fan mount, a hard fan cowl fixedly mounted in the seat cushion body and having shunt passages arranged in air communication between the air channels of the seat cushion body and the air output port of the fan, and a flow guide pivoted to the fan cowl and coupled to the air output port of the fan for biasing with the fan relative to the fan cowl when the flexible flat fan mount is bent relative to the fan cowl to fit a car seat and for guiding currents of air from the air output port of the fan into the shunt passages and the air channels of the seat cushion body.

In one embodiment, a nonwoven filtration medium is provided comprising substantially continuous sheath/core bicomponent filaments arranged to form an open, porous, fluid permeable spunbond nonwoven fabric. The core component of the filaments comprises polyester or polypropylene and the sheath component comprises polyethylene having a melting temperature less than the melting temperature of the core component and including an organic antimicrobial agent incorporated therein. A multiplicity of bond sites are distributed uniformly throughout the fabric and defined by regions where the lower-melting sheath component has softened and flowed together at filament cross-over locations, with the individual being filaments spaced apart from one another except at the filament cross-over locations. The spunbond nonwoven fabric preferably has a thickness of about 10 to 40 mils and an air permeability from 150 to 270 cfm/ft²/min.

The invention provides a rotary drum-type multi-tube dryer which can dry water-containing brown coal or other water-containing materials. The drying of the materials in the dryer is safe, reliable and efficient. The dryer mainly comprises a feed inlet, a coal-particle distributor, a high-efficiency heat-transfer internal part of a tube bundle, a dryer with build-in spiral guide vanes, a tube-type steam distributor, a rotary drum-type outer cylinder, a sealing of the rotary drum-type outer cylinder, a driver of the rotary drum-type outer cylinder, a stepless speed regulator, an inclination adjustor of the rotary drum-type outer cylinder, an electric motor, an explosion-proof gas control system, a steam addition system, a condensing-liquid reclamation device, a gaseous dust reclamation device and a support piece. Brown coal (or other water-containing materials) with the water content of 15 wt percent to 50 wt percent and the coal particle size smaller than 6.3 mm can be dried into moulded coal with the water content equal to or smaller than 8 wt percent or powder coal with the water content equal to or smaller than 3 wt percent by the dryer.

A device for producing a waterfall comprising a waterfall waterjet with at least one chamber, at least one primary outlet, at least one debris outlet, a water source fluidly connected to the waterfall waterjet, a means of opening and closing the debris outlet, and a means of anchoring the waterfall waterjet to a spa.

Disclosed are a drain device having a drain filter, which causes foreign substances contained in washing water to be effectively filtered out by a filter chamber to prevent the foreign substances from flowing into a pump chamber, and allows the washing water to smoothly flow in the filter chamber to use the drain filter for a long time, and a washing machine having the same. The washing machine includes a housing provided with a washing chamber; and a drain device including a filter chamber provided with a filter member installed therein filtering out foreign substances from washing water in the washing chamber, and a pump chamber connected to the filter chamber to forcibly discharge the washing water. The filter member has a sectional area gradually increased toward the pump chamber and is provided with an end terminal separated from an inlet of the pump chamber by a designated distance.

The invention belongs to the technical field of steel pipe polishing equipment, and particularly relates to polishing equipment suitable for steel pipes of different pipe diameters. The polishing equipment comprises a rack, an outer cylinder, an inner cylinder and a pipe body, wherein the inner side of the rack is fixedly connected to the outer cylinder; through holes are formed in the top and bottom of the rack; the top end of the outer cylinder is fixedly connected to the inner cylinder; the outer cylinder is used for storing gravels; a polishing module is arranged at the bottom of the outercylinder and comprises a polishing ring No. 1, a polishing ring No. 2, a polishing ring No. 3, a polishing ring No. 4, a curved gear No. 1 and a curved gear No. 2; the polishing ring No. 1, the polishing ring No. 2, the polishing ring No. 3 and the polishing ring No. 4 are arranged from top to bottom in sequence; the inner diameters of a through hole No. 1, a through hole No. 2, a through hole No. 3 and a through hole No. 4 are decreased in sequence; and the through hole No. 1, the through hole No. 2, the through hole No. 3 and the through hole No. 4 are used cooperatively for the fine polishing of pipe bodies of different pipe diameters. The polishing equipment can effectively improve the polishing quality of the pipe body and reduces the clearing workload of the later period.

The invention relates to the field of medical auxiliary instruments, in particular to a multi-functional drying box. The drying box comprises a box body, a vertical partition plate is fixedly arranged in the box body, bracket tracks are fixedly arranged on the inner wall of the box body and the partition plate, a bracket is connected with the bracket tracks in a sliding mode, and an ultraviolet lamp tube is further arranged on the partition plate; a hook and an LED lamp are arranged on the upper portion of the box body, the LED lamp is connected with a control device, a box door is further arranged on the box body, the lower portion of the box body is connected with a hot air device, an air vent is formed in the lower portion of the inner wall of the box body, a drain channel is formed in the bottom in the box body and communicated with the outside through a drain pipe. The multi-functional drying box is simple in structure and reasonable in design, and the drying efficiency is improved through the structural innovation of the bracket and additional arrangement of circulating air set equipment.

The invention provides transparent polypropylene with high fluidity and high heat resistance and a preparation method thereof. The transparent polypropylene comprises the following components in percentage by weight: 30-70% of random copolymerization polypropylene, 23-70% of homopolymerization polypropylene, 0-5% of ethylene-octylene copolymer, 0.1-2% of a nucleating agent, 0.1-2% of an additive and 0.1-2% of a processing agent. The transparent polypropylene compound material with high fluidity, high rigidity and high heat resistance, disclosed by the invention, utilizes the advantages of high rigidity and high heat resistance of homopolymerization polypropylene, and the heat resistant temperature and the rigidity of random copolymerization polypropylene are improved; through different fluid polypropylene compounding, a wide fluidity range is achieved, so that the transparent polypropylene can meet different customer requirements; a transparent toughening agent can be added, so that the purpose of improving the low-temperature toughness is achieved; through the compounding of homopolymerization polypropylene and random polypropylene, and the adding of the nucleating agent, the particle diameter of spherocrystal is shortened, the transparency is improved, the compatibility is good, no current ripple exists on the surface, and the lustrousness is high.

The Swivel Flosser comprises of these parts: a handle portion which is used to hold the flosser, a head portion which grasps the dental floss and has a u shaped configuration. The dental floss is part of the head portion. The head and the handle can be assembled by the user, once assembled together the head can rotate with respect to the handle allowing the user to clean the front teeth, the molars and everything in between with ease. The handle as well as the head can both be disposable or reusable according to utility and personal preference.

The invention discloses a dishwasher fan component and dishwasher with same. The fan component comprises a fan body, a fan outer shell and a pick. The fan body has a fan air inlet and a fan air outlet. A first channel, a second channel and a third channel are defined in the fan outer shell. The first channel is optionally communicated with the second channel or the third channel. The fan outer shell has a fan connection port which is communicated with the first channel. The second channel is communicated with the fan air outlet. The pick is placed in the fan outer shell, and can move in pivoted mode between a first position and a second position. When the pick is in the first position, the first channel and the second channel are connected, and the first channel and the third channel is segregated. When the pick is in the second position, the first channel and the third channel is connected, and the first channel and the second channel is segregated. The fan component has the advantages of being compact in structure, occupying few space, being high in drying efficiency, and long in service period, thus achieving the function of accelerating the drying, and preventing siphoning amid draining.

The invention discloses a friction stir welding device and a friction stir welding method by applying ultrasonic vibration from the bottom, and relates to a friction stir welding device and a friction stir welding method. According to the friction stir welding device and the friction stir welding method, ultrasound is applied to to-be-welded workpieces around a stirring pin from the bottom, and the metal deformation resistance is reduced by utilizing the ultrasonic vibration, so as to promote metal flow at the root of weld and reduce the tendency of weak connections, thereby achieving the purpose of increasing the welding quality. According to the device, a rectangular groove is processed in a workbench along a welding direction, a support base is arranged in the rectangular groove, a circular through hole is processed in the center of the support base, and in a welding process, axial pressure is mainly born by the support base; an ultrasonic vibration device is fixed below the workbench, and in the welding process, ultrasonic vibration energy is vertically applied to the to-be-welded workpieces around the stirring pin from the bottom by the ultrasonic vibration device. The method comprises the steps of (1) fixing the support base; (2) fixing the ultrasonic vibration device; (3) performing friction stir welding. The device and the method are used in the field of welding.

The invention discloses an air-conditioner air supply device with airflow distribution components. The air-conditioner air supply device comprises at least two circular air guides which are through in middles and with front openings and back openings. Each circular air guide is a single component, and the back opening of the circular air guide serves as an air inlet while the front opening thereof serves as an air outlet. The circular air guides are arranged from front to back sequentially and an air duct running through from front to back is formed in the middle. A circular heat-exchange air duct is formed between the adjacent two circular air guides. The airflow distribution components for distribution of heat-exchange air, entering the heat-exchange air duct, from a heat exchanger of an air conditioner with the air-conditioner air supply device are arranged in at least one of the circular heat-exchange air ducts. By the aid of the airflow distribution components arranged in the heat-exchange air ducts, heat-exchange air entering the air supply device is distributed along the circumference, and accordingly air supply uniformity of the air supply device is improved.

The invention discloses a pasteurization machine which is used for solving the problems that the incongruous water temperature in a sterilization tank in the prior art influences the sterilization effect. The pasteurization machine comprises a rack, wherein a sterilization tank and a cooling tank are arranged sequentially on the rack and are provided with a conveyer belt; the sterilization tank consists of a base plate, two side plates and two inclined plates which are connected with one other; a temperature sensor is arranged in the sterilization tank; the two side plates are provided with at least two inclined baffles; the baffles and the side plates form a channel; the baffle on the front section of the side plates is higher than the baffle on the rear section of the side plates. Due to the adoption of the pasteurization machine, water in the sterilization tank is driven to circulate, the consistent water temperature of all parts in the sterilization tank is guaranteed, and the temperature sensor can detect the water temperature in the sterilization tank accurately so as to guarantee the sterilization effect; the pasteurization machine has the characteristics of simple structure and high practicability.

The invention discloses a steam exhaust waste heat recovery unit, belonging to the field of heating, ventilating and air conditioning. The steam exhaust waste heat recovery unit consists of an absorption heat pump and a condenser. Input steam exhaust enters into the condenser and the evaporator of the absorption heat pump simultaneously, hot water sequentially passes through the condenser and the absorber and condenser of the absorption heat pump to be heated step by step, the steam exhaust and the hot water in the condenser exchange heat, the hot water is heated, the heated hot water flows into the absorption heat pump, a high temperature heat source is taken as a driving energy source to absorb the heat in the steam exhaust, the steam exhaust releases heat and is condensed into condensed water, and the condensed water flows out the unit and is recovered by a condensed water recovery system by virtue of a return water pipe. By utilizing the steam exhaust waste heat recovery unit disclosed by the invention, the recovery problem of low temperature steam exhaust waste heat released by turbine in a power plant or released during industrial production, and higher temperature heat supply network hot water can be produced.

The invention discloses a blood flow guide device of a centrifugal magnetic suspension artificial heart pump. The blood flow guide device of the centrifugal magnetic suspension artificial heart pump comprises an outer shell, a rotor thrust disc and a guide wire. A stand column is fixed to the middle of the outer shell, the rotor thrust disc rotates around the stand column, a gap exists between the rotor thrust disc and the outer shell, the upper end of the outer shell is provided with a blood inlet, the lower end of the outer shell is provided with a blood outlet, and the rotor thrust disc is provided with the guide wire. When the rotor thrust disc rotates, blood is sucked from the inlet, one part of the blood reaches the blood outlet along a seam between the outer side of the rotor thrust disc and the outer shell and then flows out from the outlet, and the outer part of the blood flows back from bottom to top from a seam between the inner side of the rotor thrust disc and the stand column and then converges with the inflow blood at the inlet. The blood flow guide device of the centrifugal magnetic suspension artificial heart pump can guide and accelerate radial blood flow speed at the axle end in order to eliminate a blood low-speed area stagnation area at the axle end of a pump body, then avoid thrombosing, and accelerate the actual application progress of the artificial heart pump.

The invention discloses a turbulent-flow crushing machine of a soybean milk maker, which comprises a machine head, a motor arranged in the machine head, a curved-surface body turbulent-flow component and a crushing and pulping tool connected with the motor through a shaft and is characterized in that: the turbulent-flow component is directly or indirectly mounted on the machine head; the turbulent-flow component is an integrated turbulent-flow cover or a turbulent-flow cover-like body consisting a plurality of turbulent-flow plates; a space for accommodating the shaft passing through is preserved in the center of the turbulent-flow component; and the lower end face of the crushing and pulping tool is not lower than the lower end face of the turbulent-flow component. In the invention, by arranging the curved-surface body turbulent-flow component and mounting the crushing and pulping tool at a position on the same height as or on a lower height than the lower end face of the turbulent-flow component, the problem that turbulent and crushing actions are independent of each other and cannot promote each other in the prior art is solved. The design allows a high negative pressure is formed on the periphery of the crushing and pulping tool, so the flowing of the pulp is accelerated; therefore, the crushing effect is improved, crushing time is reduced and a good defoaming effect is achieved.

The invention relates to a flow passage of a helical-tooth drip irrigation emitter. An upper boundary, a lower boundary and a flow passage depth form a groove-shaped flow passage. The flow passage is characterized in that: raised flow passage teeth are arranged in the groove-shaped flow passage; dedendums of the flow passage teeth and the upper boundary or the lower boundary form circular arc chamfers, and flow passage units consist of the boundaries, the circular arc chamfers, the flow passage teeth and the circular arc chamfers; and the flow passage teeth in upper and lower flow passage units are arranged in a staggered mode, and a plurality of the same flow passage units are connected end to end sequentially to form an integral flow passage. A flow passage structure enables water flow in the flow passage to generate stronger turbulence effect under certain pressure, so that the hydraulic power performance of the emitter can be improved, and the blocking resistance of the emitter can be strengthened. The flow passage structure adopts a staggered helical-tooth shape, and angles of inclination of the flow passage teeth can be changed from 0 degree, and can incline towards two sides of a direction of a center line vertical to the flow passage to form different upstream faces and downstream faces of the flow passage, so that the hydraulic power performance of the emitter is changed and the blocking resistance of the emitter is improved.

The invention provides a rigid mold-flexible mold composite forming device and method of a reducing cylindrical part, and belongs to the technical field of plate forming. The device comprises a firstplunger, a blank holder, a combined concave mold and a second plunger. A plate is pressed into a cavity of the combined concave mold through the first plunger, a viscous medium in an inner cavity of the first plunger is extruded out from medium holes thorough the second plunger, medium pressure acts on the to-be-formed plate so that the to-be-formed plate can deform, and the characteristics that the traditional plate rigid mold forming efficiency is high and the part repeatability is good are achieved; meanwhile, the characteristics that the viscous medium has viscidity adhesive force and strain rate sensibility during viscous medium pressure forming are achieved; the problem that parts with complex cavities cannot be obtained during rigid mold forming is solved; and meanwhile the problemsthat when large-size parts are formed, filling of the viscous medium is slow in the viscous medium pressure forming process, after part forming, a large number of viscous media adhere to the metal surfaces, and the removal time is long are solved.

A foaming molten resin containing reinforcement fibers and super critical fluid is injected into a cavity with a short shot (a), the foaming molten resin is made self-foam and flow in the cavity (b), and a volume of the cavity is increased by expanding molds so as to expand the foaming molten resin in the cavity (c). During the expansion step (c), the expansion of the foaming molten resin is assisted by gas vent, vacuum suction, partial pressure adding with gas or resin, or a spring back force of the reinforcement fiber in the foaming molten resin. Accordingly, there can be provided a resin foam molded article that has no improperly large air voids therein, a sufficient volume expansion thereof, and a superior transferability function.

The invention discloses a pyrolysis device and method for a carbonaceous substance. The pyrolysis device for the carbonaceous substance comprises a furnace body, an upper heat radiation pipe, a lower heat radiation pipe, a solid partition plate and a porous partition plate, wherein a hearth is provided with a pyrolysis gas inlet and a pyrolysis gas outlet; the solid partition plate is arranged between the upper heat radiation pipe and the lower heat radiation pipe and is adjacent to the lower heat radiation pipe; the porous partition plate is arranged between the solid partition plate and the upper heat radiation pipe; the pyrolysis gas inlet is located between the solid partition plate and the porous partition plate, and the pyrolysis gas outlet is located between the upper heat radiation pipe and the porous partition plate. According to the pyrolysis device for the carbonaceous substance, disclosed by the invention, the hearth is internally provided with the solid partition plate and the porous partition plate which are good in heat transfer performance, so that the flowing speed of pyrolysis gas is increased, and the forced convective heat transfer of the pyrolysis gas in the hearth is realized, thus the heat transfer effect is enhanced, the secondary pyrolysis probability of the pyrolysis gas is reduced, and the tar yield is increased.

The invention belongs to the technical field of polymeric composite materials, and particularly relates to a high-surface glossiness and high-dimensional stability polyamide composite material and a preparation method thereof. In parts by weight, the polyamide composite material is prepared from the following components: 30 to 90 parts of polyamide; 5 to 15 parts of semi-aromatic polyamide; 0.1 to 1.0 part of coupling agent; 0.1 to 1.0 part of antioxidant; 0 to 1.0 part of heat-resistant agent; 0.1 to 2.0 parts of lubricating agent; 0.1 to 1.0 part of fluidity-improving agent; 20 to 50 parts of glass fibers; and 0 to 10 parts of filler. The polyamide composite material disclosed by the invention has high glossiness, high fluidity, chemical resistance and good mechanical properties; moreover, after moisture is absorbed, the decrease of the physical properties of the material is little, the dimensional stability is high, wear and abrasion can be resisted, heat resistance is good, and the processability is good.

The invention provides an unmanned aerial vehicle pollination device. The device comprises an unmanned aerial vehicle body, a pollen box is suspended at the bottom of the unmanned aerial vehicle body,a discharge port is formed in the bottom of the pollen box, the discharge port is connected with at least one pollen discharge pipe extending outward, and an air flow pressurizing device is arrangedon any of the pollen discharge pipes to reduce an air pressure at an outlet end of any pollen discharge pipe, so that pollen in the pollen box is sucked out. The device has the advantages that the adsorption of the pollen is achieved without destroying the pollen, the flow speed of the pollen is increased, and the pollination efficiency is effectively ensured. Due to the stable and continuous airflow in the pipes and the uniformity of the air flow direction, a pollen moving trajectory is highly uniform, the collision between the pollen is avoided, the clogging of the pollen discharge pipes isprevented, the moving continuity and the body integrity of the pollen are improved, an excellent pollination effect is ensured, and the pollination efficiency and the fruit setting rate of a vegetation are improved to some extent.

The invention relates to an air guide device and an air conditioner indoor unit with the air guide device. The air guide device comprises an air guide plate, a plurality of first swing blades and a plurality of second swing blades; the first swing blades are arranged on the upper surface of the air guide plate at intervals in the length direction of the air guide plate, each first swing blade is rotatably mounted on the upper surface of the air guide plate, the second swing blades are arranged on the lower surface of the air guide plate at intervals in the length direction of the air guide plate, and each second swing blade is rotatably mounted on the lower surface of the air guide plate. The invention further provides the air conditioner indoor unit with the air guide device. Through the air guide device, the air guide plate and the swing blades on the two sides of the air guide device are integrated, and the vertical air direction and the left-and-right air direction can be adjusted through one part; when an air conditioner is subject to air outlet, outlet air can be blown to the different directions, the air outlet range can be expanded, during air outlet, air is not directly blown to a user, air flowing is more smooth, and the use experience of the user is improved.

The invention discloses a spouted bed reactor and an olefin polymerization method thereof. The spouted bed reactor comprises a spouted bed reactor main body, a circulation gas system, and a solid particle conveying device. With the solid particle conveying device, solid particles in the spouted fluidized bed is subjected to external circulation, such that the flowing of solid particles and gas in bed layer and especially annulus areas is promoted, particle mixing in the reactor is enhanced, retention area is eliminated, heat transfer efficiency and mass transfer efficiency are improved, and possibilities of wall adhesion agglomeration is reduced. A material outlet port is arranged on an external circulation pipe, and is connected to a material discharge system, such that material discharge efficiency can be improved. Auxiliary gas flow is delivered to a reaction bottom diameter-reduction section. Production performance can be adjusted by changing the composition of main gas flow and auxiliary gas flow.

The invention relates to an impeller-guiding speed-changing swirling-flow anti-wax device. The impeller-guiding speed-changing swirling-flow anti-wax device comprises a motor, a belt pulley assembly and a hollow rod, wherein the motor is connected with the hollow rod through the belt pulley assembly, the hollow rod is hung at a well opening through an upper four-way assembly, and extends to an oilpipe downwards, a flange joint is installed at the upper end of the hollow rod, a one-way valve is installed at the lower end of the hollow rod, and guiding impellers are arranged at the portion, extending into the oil pipe, of the hollow rod and provided with blades; when the guiding impellers rotate along the hollow rod, the guiding impellers generate the pressurizing effect and the speed increasing effect on produced liquid, and liquid flow spirally flowing is formed; precipitated wax of the wall surface is washed out and scraped, the flowing speed of the liquid flow is increased, and waxcrystals are carried; the rotating speed of the motor is controlled by a frequency-modulation speed-changing driving control cabinet. The impeller-guiding speed-changing swirling-flow anti-wax devicehas the function of preventing the wax crystals while the precipitated wax and formed scales are cleaned, the anti-wax and wax-cleaning aims are achieved accordingly, and the current rod-free oil recovery wax precipitation problem is solved.

The invention discloses an eliminator used for formaldehyde in indoor air. The eliminator comprises a shell, wherein the shell is provided with a shell cover matched with the shell; the side wall of the shell is provided with a plurality of slots; porous support layers are arranged in the slots; the porous support layers are provided with adsorbents; a permeable plate is arranged under the porous support layers; the permeable plate is provided with regular through holes; a liquid formaldehyde collecting agent is put under the permeable plate; the lower end of the shell is provided with pulleys; an air channel is arranged under the permeable plate and in the side wall of the shell; the air channel is connected with a suction blower; and the suction blower is fixed on a horizontal plate of the side wall of the shell. The eliminator used for formaldehyde in indoor air in the structure can ensure that the eliminator firstly absorbs moisture in the air, and then absorbs the formaldehyde so as to enhance the efficiency of absorbing the formaldehyde with activate carbon. Meanwhile, the side wall of the shell is provided with the suction blower to enhance the flow velocity speed of the air and the formaldehyde eliminating speed of the indoor air.

The invention discloses a gas extraction device in a coal mining area. By setting a high frequency oscillator, the gas can be completely extracted and the gas flow can be promoted. In the process of gas extraction, a plugging assembly is firstly used to mount and position an extraction pipe and after well plugging, good sealing performance is ensured; later, an extraction pump is used, a control valve is controlled, the gas is firstly extracted, after the gas is extracted to a certain degree at an extraction hole, the high frequency oscillator is used to oscillate, and after a certain period of continuous extraction, a pulse aeration module is opened again, a protective gas is impulsively injected into a coal seam, after certain pressure arrives in the borehole in a certain time of pulse aeration, the gas in the borehole is continuously extracted, and thus, the high frequency oscillator is used to promote circulation of the gas, the extraction effects are ensured, the remaining small part of gas is subjected to exchange and circulation by using a pulse aeration mode, and the gas is completely extracted.

Provided is tea leaves cleaning equipment with screening function. The equipment comprises a base plate, a frame device, a feeding device, a stirring device, a filtering device, a positioning device, a driving device, a first motor device and a second motor device. The base plate is provided with a first support block and a first roller. The frame device comprises a frame body, a first elastic rod, a first limiting rod, a first spring and a first sealing block. The feeding device comprises a feeding hopper, a first baffle, a first filter screen, a first cross plate. The stirring device comprises the first motor, a first fixing rod, a first shaft, a stirring rod, a second cross plate. The filter device comprises a second filter screen, a first vertical rod, a first connecting ring, a second elastic rod, a second spring and a first cable. The positioning device comprises a second vertical rod, a third spring, a first cross rod, and a first positioning rod. The equipment is capable of effective cleaning operation for the tea leaves, the tea leaves fully contact with water, the flow of water is promoted, and the cleaning effect is improved.