58results about How to "Effective destruction" patented technology

Belonging to the field of petrochemical engineering, the invention discloses a catalytic slurry oil purification device, which comprises a tank body, and a feed end and a discharge end respectively arranged at two ends of the tank body. An upper partition plate and a lower partition plate are fixedly connected to the inner wall of the tank body, a discharging opening is formed in the upper partition plate, and a feeding opening is formed in the lower partition plate; the interior of the tank body is divided into three independent cavities by the upper partition plate and the lower partition plate; according to the scheme, the filter element is sleeved with the hollow cylinder, and the rotatable first spiral flow deflector is further arranged between the inner wall of the hollow cylinder and the outer wall of the filter element; a rotatable first spiral flow deflector is further arranged between the inner wall of the hollow cylinder and the outer wall of the filter element; a shear force generated by rotation of the first spiral flow deflector can prevent a filter cake on the surface of the filter element from forming a compact thick layer; a filter cake layer can be controlled within a relatively thin thickness range, and the rising speed of the pressure difference is delayed, so that the operation duration of a single filtering period is prolonged; and the single-time continuous treatment capacity of the device is greatly improved.

The invention discloses a flue gas waste heat recovery device and method for a garbage incinerator. Relates to the technical field of waste incineration treatment and comprises a waste heat recovery box, a heat exchange pipe set driven by a main control gear, a transfer gear and a fixed gear ring is arranged in the waste heat recovery box, and heat exchange pipes conduct revolution and autorotation in smoke at the same time to enhance heat exchange. Accumulated dust on the outer surface of the heat exchange tube is removed through the rotating treatment scraper and the removing brush cylinder, and the reciprocating treatment kettle is used for knocking the tube wall of the heat exchange tube to shake off the dust; the flow speed and the flow direction of flue gas can be intelligently adjusted through an angle-adjustable speed adjusting plate on a treatment scraper, so that the device is suitable for different working conditions; the device realizes efficient and stable recovery of flue gas waste heat, can keep a heat exchange surface clean on line, and is high in adaptability.

The application relates to a heat dissipation technology field of a fuel cell, in particular to a heat dissipation device integrated with anti-vibration and a fuel cell heat dissipation system, which comprises a shell, a fan arranged in the shell and a heat exchanger arranged on the side of the shell, and further comprises two opposite vertical arms arranged in the shell, a plurality of guide vanes corresponding to the gaps between two adjacent fins of the heat exchanger are rotatably arranged between the two vertical arms; the inclined guide vanes can change the flow direction of the airflow, so that the airflow can directly impact the wall surface of the fin, thereby effectively destroying the airflow layer wrapped on the fin due to vibration and not easy to flow, when the vibration intensity increases, the swing amplitude of the guide vanes increases, so that the stripping effect of the airflow on the low-speed airflow layer attached to the wall surface of the fin is more intense, the stripping effect of the airflow layer automatically matches the current vibration condition, the speed regulation mechanism increases the rotating speed of the fan, compensates for the additional wind resistance loss, and ensures that the convective heat exchange efficiency is maintained under different intensity vibration working conditions.

The utility model discloses an insoluble anode electrodeposition system capable of recovering byproducts. The system comprises an electrodeposition cell unit, an oxygen collection and purification unit, an electrodeposition liquid blending and neutralizing unit, a homogeneous membrane electrodialysis concentration unit, a resin purification unit and an acid-base separation unit, wherein the oxygen exhaust port is connected with an air inlet of the condenser; the anolyte overflow port is connected with an anolyte temporary storage tank; the dilute alkali circulation tank is connected with the hydroxide preparation kettle; a filtrate outlet of the filter press is connected with a homogeneous membrane electrodialysis raw material brine feeding tank; the bipolar membrane electrodialysis light salt brine temporary storage tank is connected with a raw material water inlet of the homogeneous membrane electrodialyzer; the homogeneous membrane electrodialysis strong brine temporary storage tank is connected with a feeding hole of the multi-stage resin exchange tower; the dilute acid circulating tank is connected with a feeding hole of the multi-stage resin exchange tower; and the purified strong brine storage tank is connected with a raw material brine inlet of the bipolar membrane electrodialyzer. The device can be used for recovering by-products in the insoluble anode electrodeposition process of the sulfate system, and is good in effect and relatively low in investment cost.

This utility model discloses an adhesive mixing device for fiberboard production, including a mixing tank. A positioning ring is installed on the bottom side wall of the mixing tank. The outer wall of the positioning ring has evenly distributed fixing openings. An upper cylinder with an opening facing downwards is installed on the inner wall of each fixing opening. A lower cylinder with an opening facing upwards is located at the bottom of the upper cylinder. A vibration spring is installed on the inner wall of the upper cylinder, and the bottom outer wall of the vibration spring is connected to the inner wall of the lower cylinder. An air pump is installed on the top outer wall of the mixing tank. The output end of the air pump is connected to the interior of the mixing tank through a pipe. A vibration motor is fixedly installed at the center of the bottom of the mixing tank. This utility model utilizes the high-frequency vibration generated by the vibration motor driving the vibration spring, combined with the negative pressure environment created by the air pump drawing a vacuum inside the mixing tank, to effectively break down the bubble structure in the adhesive, causing the bubbles to rise rapidly and burst, thus quickly eliminating air bubbles in the adhesive.

The application discloses an aquaculture tail water treatment system and a use method thereof, which comprises a tail water storage tank, a high-pressure treatment unit, a photocatalytic reactor and a control unit. The high-pressure treatment unit comprises a supercritical water reactor, a controller connected with the control unit, a temperature sensor installed on the supercritical water reactor, a pressure sensor and a viscosity monitor used for monitoring the viscosity of tail water. The controller is used for receiving data collected by the temperature sensor and the pressure sensor. The supercritical water reactor has two different environmental states, i.e. a subcritical water environment and a supercritical water environment. The control unit adjusts parameters in the supercritical water reactor and switches the two different environmental states. The solubility of mucus, gonad hormones, organic matters and other impurities in tail water can be enhanced, and the macromolecular network structure and proteins in the impurities can be effectively destroyed, so that more efficient decomposition is realized.

The invention provides a hydrogen-suitable exhaust nozzle integrated heat regenerator, and relates to the technical field of high-end equipment manufacturing, and the hydrogen-suitable exhaust nozzle integrated heat regenerator comprises an exhaust nozzle forming a fuel gas flow channel; the gradient double-path heat return channel is embedded between the outer wall surface and the inner wall surface of the exhaust nozzle, is integrally formed with the exhaust nozzle, and is used for circulating a hydrogen medium to absorb gas heat; the gradually-changed double-path heat return channel comprises a hydrogen conveying pipe and a hydrogen return pipe which are used for inputting and outputting a hydrogen medium, a plurality of runway-shaped flow channels arranged at intervals in the axial direction and a plurality of confluence channels, each flow channel is provided with an arc-shaped channel extending in the circumferential direction, each confluence channel is connected between every two adjacent runway-shaped flow channels, and each confluence channel is communicated with the corresponding runway-shaped flow channel. And after the hydrogen medium flows in from one runway-shaped flow channel, the hydrogen medium is divided into two branches which reversely flow through the arc-shaped channels on the two sides respectively, and then enters the next runway-shaped flow channel after being converged by the converging channel, so that a double-path roundabout flow path is formed. According to the liquid hydrogen heat recovery device, efficient recovery of fuel gas heat in the flowing process of liquid hydrogen is achieved through the gradually-changed double-path heat recovery channel and the reinforced fin structure.

The invention relates to the technical field of agricultural product deep processing and functional food science, in particular to enzymolysis cyperus esculentus powder and a preparation method and application thereof. The preparation method comprises the steps that cyperus esculentus powder and water are mixed, pulped and cured; performing high-speed shearing pretreatment on the slurry; adding a compound enzyme preparation containing amylase, cellulase and protease for enzymolysis; carrying out enzyme deactivation after enzymolysis, and filtering; performing emulsification and two-stage high-pressure homogenization treatment on the filtrate; and finally spray-drying to obtain a finished product. Through the synergistic effect of high-speed shearing and composite enzymolysis, cell walls of cyperus esculentus are effectively broken, macromolecular nutrient substances are converted into micromolecules, and the solubility, taste and nutrition utilization rate of the product are remarkably improved. The prepared enzymolysis cyperus esculentus powder is good in instant solubility, good in flavor and high in stability, and can be widely applied to the fields of solid beverages, special dietary foods and the like.

The invention discloses a method for efficiently leaching platinum group metal in a waste automobile catalyst, and belongs to the field of rare and precious metal smelting. The method comprises the following steps: a leaching process: mixing the hulled waste automobile catalyst with a leaching agent, carrying out acid leaching in an acidic solution for a period of time, adding a complexing agent to complex platinum group metals, leaching for a period of time, and filtering to obtain a pregnant solution rich in the platinum group metals and carrier residues; wherein the leaching agent is a cerium-containing compound; a resin adsorption process: adsorbing the pregnant solution through an adsorption column filled with adsorption resin to obtain an adsorbed solution; and an elution process: washing the adsorbed adsorption resin with water and eluting the platinum group metal step by step, and regenerating the eluted adsorption resin for cyclic utilization. The method aims at avoiding generation of toxic and harmful substances (chlorine and NOx) and use of highly toxic cyanide in an existing wet process, environmental pollution and potential safety hazards are fundamentally eliminated, and meanwhile the leaching efficiency of the platinum group metal is remarkably improved.

The invention relates to the technical field of traditional Chinese medicinal material processing, in particular to a traditional Chinese medicinal material crushing and alcohol extraction integrated device. The device comprises a base and an extraction tank fixed at the top of the base. Through the structural design of the extraction tank, the pretreatment mechanism and the grinding mechanism, the device realizes organic combination of crushing and alcohol extraction in the processing process of traditional Chinese medicinal materials, can ensure that the traditional Chinese medicinal materials can be fully crushed and the cell walls of the medicinal materials are effectively damaged, so that the effective components in the traditional Chinese medicinal materials are released to the greatest extent, and the extraction efficiency is improved; through the structural design of the uniform mixing mechanism, the device is matched with vibration generated by an ultrasonic transducer to enable a solvent to continuously flow, so that the solvent can continuously make contact with the traditional Chinese medicinal materials, cell walls can be broken under the cavitation action of ultrasonic waves, and the yield and quality of the traditional Chinese medicinal materials are improved; active ingredients in cells can be more easily released into the solvent, so that the extraction speed is accelerated.

This utility model relates to the technical field of waste gas purification devices, and discloses a high-efficiency adsorption device for purifying calcining furnace waste gas, including a base and a disinfection chamber. A spray chamber is fixedly connected to the top of the base. A second air guide pipe passes through one side of the spray chamber, and one side of the second air guide pipe passes through the outer wall of the disinfection chamber. A disinfection component is installed inside the disinfection chamber. An adsorption chamber is fixedly connected to the top of the disinfection chamber, and an installation strip is fixedly connected inside the adsorption chamber. An adsorption component is installed inside the installation strip. In this utility model, the spray layer removes large particulate impurities, preventing blockage of subsequent honeycomb catalysts and activated carbon plates; the ultraviolet catalytic combination efficiently inactivates microorganisms and decomposes VOCs. Simultaneously, the porous design of the air guide box ensures uniform dispersion of waste gas and sufficient contact with activated carbon, significantly increasing the adsorption area and time, improving activated carbon utilization and overall purification efficiency.

The utility model discloses a ball screw for a braking system, which comprises a thread sleeve and a screw, the thread sleeve and the screw are respectively provided with a threaded channel, a plurality of balls are rotatably arranged in the threaded channels, the thread sleeve is rotatably connected, a reverser is arranged on the thread sleeve corresponding to the positions of the balls, and the reverser is connected with the screw. The threaded sleeve is provided with a flange in the length direction of the lead screw, a connecting spline is arranged on the flange, the lead screw is arranged in a hollow mode to form a connecting through hole, the reverser is provided with a guide groove used for being communicated with an adjacent threaded channel, the position, corresponding to the guide groove, of the reverser is provided with a lubricating window, and a grease storage device is inserted into the lubricating window. The structure is simple, the using effect is guaranteed, meanwhile, the balls are convenient to lubricate, and the good using effect is achieved.

This invention discloses a side-mounted magnetic stirring device and method. The device includes a storage unit, a spherical stir bar placed inside it, and a magnetic stirrer disposed on its outer wall. The spherical stir bar has an embedded magnet, and the magnetic stirrer drives the spherical stir bar to roll and / or rotate through a magnetic field. The outer wall of the storage unit may be provided with a slide rail or guide groove, and the magnetic stirrer can move axially via a slider or roller; it may also include a fixing component and an adjusting screw for connecting the magnetic stirrer and the liquid-pushing piston and adjusting their relative positions. The method includes placing the spherical stir bar inside the storage unit, starting the magnetic stirrer to drive stirring, and making the magnetic stirrer move synchronously with the liquid-pushing piston. This invention requires no modification to the opening, does not occupy bottom space, has no leakage risk, and is easy to assemble and disassemble, making it particularly suitable for tubular liquid storage units with limited bottom space or requiring temporary stirring.

This invention discloses a coal gangue grouting and filling material with high rheological resistance and resistant to bleeding, its preparation method, and its application, relating to the field of mine filling material technology. The grouting and filling material, by mass percentage, comprises: 70%~75% coal gangue, 0.55%~2.3% composite rheology modifier, and the balance being water; wherein the composite rheology modifier includes an air-entraining agent and a dispersant, with a mass ratio of (90~99):(1~10); the air-entraining agent is a surface-active foaming material, and the dispersant is a phosphate additive. In its preparation, coal gangue is first mixed with water and stirred to obtain an initial slurry; then the air-entraining agent and dispersant are mixed to prepare the composite rheology modifier; finally, the composite rheology modifier is added to the initial slurry and stirred until homogeneous to obtain the grouting and filling material. This grouting and filling material uses coal gangue as the main raw material, has a simple preparation process, and possesses excellent fluidity, stability, and pumpability.

The utility model discloses a dust remover cooling device for secondary aluminum alloy production, which belongs to the technical field of flue gas cooling and comprises an air cooling box, a plurality of shunt pipes are longitudinally arrayed in the air cooling box, conical cavities are detachably connected to the top surface and the bottom surface of the air cooling box, the conical cavity at the top is communicated with a flue gas inlet pipe, and the conical cavity at the bottom is communicated with a flue gas outlet pipe. The top end of the shunt pipe extends out of the top surface of the air cooling box and is communicated with the conical cavity communicated with the flue gas inlet pipe; the bottom end of the shunt pipe extends out of the bottom surface of the air cooling box and is communicated with the conical cavity communicated with the flue gas outlet pipe; an air inlet and an air outlet are respectively formed in two opposite side surfaces of the air cooling box; a fan is correspondingly and fixedly connected outside the air inlet; a spiral flow deflector is arranged in the flow dividing pipe and detachably connected with the flow dividing pipe. Through the innovative structural design, the high-temperature flue gas cooling device has remarkable advantages in the aspects of high-temperature flue gas cooling efficiency, equipment maintenance convenience and the like.

This invention provides a method for preparing a complete-element organic water-soluble fertilizer from traditional Chinese medicine extracts, belonging to the field of fertilizer technology. The raw materials for preparing the complete-element organic water-soluble fertilizer, in addition to the traditional Chinese medicine extract, include molasses fermentation products, macro-elements, micro-elements, adjuvants, and ethylenediaminetetraacetic acid (EDTA). The addition of the traditional Chinese medicine extract enables the complete-element organic water-soluble fertilizer to achieve high quality and high yield when applied, resulting in higher crop yields and stronger disease resistance, overcoming the shortcomings of existing organic water-soluble fertilizers in terms of quality and yield. The traditional Chinese medicine extract is the key raw material, and its preparation involves extracting active ingredients from powders of Erythrina variegata leaves, Atractylodes macrocephala, Cnidium monnieri, and Centella asiatica. The preparation process incorporates enzymatic hydrolysis using cellulase and pectinase. Furthermore, this invention adjusts the timing of the traditional Chinese medicine additions and the extraction temperature to enhance the high-quality and high-yield effects.

This invention provides a follow-up clamping device for providing vortex gas to a laser welding head to protect the workpiece being welded. The follow-up clamping device includes: a clamping body having a conical inner cavity; a connecting member, one end of which is connected to the laser welding head; and an annular gas supply member, through which gas is introduced from the large opening side of the conical inner cavity, converges and forms a vortex-like converging airflow within the conical inner cavity, and is then ejected from the small opening side of the conical inner cavity, suitable for spraying towards the workpiece being welded. This invention solves the problems of unstable gas protection and the existence of protection dead zones in existing technologies, as well as the problem of severe plasma shielding effects affecting welding depth and energy transmission in existing technologies. It also solves the problem of existing laser welding clamping mechanisms obstructing airflow and causing protection blind zones.

The application discloses a lactobacillus delbrueckii subsp. lactis OG55 and application and products, and belongs to the technical field of microorganisms. A technical problem to be solved is that existing oral probiotic research is mostly focused on the inhibitory effect of a single strain on a single target bacterium, and the colonization ability and stability of the strain in an oral environment are insufficient. The application provides a lactobacillus delbrueckii subsp. lactis OG55. The strain can inhibit three key oral pathogenic bacteria, namely porphyromonas gingivalis, fusobacterium nucleatum and streptococcus mutans, the inhibition rate of the strain on the formation of a streptococcus mutans biofilm reaches 72%, the strain has low self biofilm formation ability, strong adhesion ability to hydroxyapatite and oral epithelial cells, and excellent colonization stability; the strain can reduce the gingival index, periodontal pocket depth and inflammatory factor level of periodontitis symptoms, improve the enamel volume and mineral density of dental caries, reduce smooth surface caries and pit and fissure caries damage, prevent and treat digestive tract tumors, and has high safety and no drug resistance.

The invention relates to the technical field of power supply equipment, in particular to a high-ripple suppression type equipment low-noise linear power supply structure based on a novel frequency amplification element and a method of the high-ripple suppression type equipment low-noise linear power supply structure based on the novel frequency amplification element. The flow guide system comprises a flow guide plate which is arranged on the inner wall of the box body and has an L-shaped cross section, a driver arranged below the flow guide plate, a transmission assembly arranged in the flow guide plate and a sealing insertion plate sliding in the flow guide plate. The lifting plate is driven by the driver to control the flow guide blades and the sealing insertion plate in a linkage mode, and external airflow is automatically guided to the drying filter element for dehumidification treatment in the equipment starting stage. The process that wet air makes contact with the low-temperature component is actively intervened from the airflow inlet end, the condensation forming condition is effectively damaged, and the electrical safety of the medical high-voltage power supply in key scenes such as carrying and restarting is improved.

The invention discloses a honeycomb biological carrier and a manufacturing method thereof, and relates to the technical field of sewage treatment. Comprising a supporting frame, at least one layer of honeycomb structure, a spiral outer rib and a coating, wherein a treatment space is formed in the supporting frame in a surrounding manner; the honeycomb structure is connected with the supporting frame and is arranged in the treatment space; the spiral outer rib is arranged between the honeycomb structure and the supporting frame, and the surface of the supporting frame, the surface of the honeycomb structure and the surface of the spiral outer rib are coated with the coating; the spiral outer ribs are used for increasing spiral disturbance of water flow, by arranging the spiral outer ribs, original linear or disordered motion of the water flow can be forcibly converted into rotary motion guided by the outer contours of the spiral outer ribs, and a retained water film on the surface of a carrier can be effectively damaged; and the substance exchange between the sewage and the surface of the biological membrane is changed from diffusion to convection, so that sludge and impurities are prevented from being deposited in pore channels.

This invention provides a wind tunnel test angle-of-attack adjustment device and its calculation method. The device includes an angle-of-attack mechanism, a suction mechanism, a front wind speed sensing component, and a rear wind speed sensing component. The suction mechanism includes a suction channel and a fan. Both the front and rear wind speed sensing components include a high-sensitivity sensor and a lifting drive component. The front wind speed sensing component also includes a low-sensitivity sensor, located downstream of the suction channel. The high-sensitivity and low-sensitivity sensors are connected to the fan and the lifting drive component via a control unit. The method includes selecting a working sensor based on the test angle of attack adjusted by the angle-of-attack mechanism; setting the target boundary layer thickness and the wind tunnel set flow rate; adjusting the real-time power of the fan; controlling the height of the working high-sensitivity sensor; and obtaining the flow rates of the high-sensitivity and low-sensitivity sensors; adjusting the real-time power of the fan based on the flow rates of the high-sensitivity and low-sensitivity sensors. This invention has advantages such as effectively controlling the boundary layer thickness and improving test accuracy.

This invention discloses a hot riveting and welding forming device for automotive interior plastic panels, belonging to the field of automotive interior processing technology. It includes a clamp at the upper end of a housing, with first electric rods fixedly connected to both sides of the upper end of the housing. A moving component is located at the lower end of the first electric rods, and a support plate is fixedly connected to the lower end of the moving component. A welding and riveting component is located at the lower end of the support plate, and a welding and riveting component is located at the lower end of a first slide rail. The welding and riveting component includes a second electric rod fixedly connected inside the support plate, with the output end of the second electric rod fixedly connected to the moving plate. By setting up the welding and riveting component, and utilizing a constant force spring in conjunction with the meshing of gears and gear blocks, the pressure of the melting head on the plastic column is kept constant. Compared with existing technologies, this effectively avoids the problem of plastic column collapse due to excessive pressure or loosening of the riveting due to insufficient pressure, resulting in more perfect melting and forming of the plastic column and a more stable and reliable hot riveting effect.

This invention belongs to the field of automotive interior material testing technology and discloses a VOC release detection device for automotive interior materials. The device includes: a rotating support frame; a detection chamber assembly rotatably mounted on the rotating support frame, the detection chamber assembly including a main housing and a sealing cover mechanism, which cooperate to form a sealed detection chamber; and a suspension clamping assembly disposed within the detection chamber for clamping the sheet-like test material and physically dividing the detection chamber into a first chamber and a second chamber. This invention constructs a breathing circulation system through an oil-free pump suction mechanism combined with a bellows buffer mechanism, driving gas to reciprocate through the test material. Combined with a rotating inverted structure, gravity is used to accumulate the excitation medium on the material surface. Under the action of alternating airflow, cyclic excitation of fluidized suspension and compaction contact is generated, thereby effectively destroying the gas boundary layer under microscopic hammering and friction, significantly improving the deep VOC desorption rate and detection accuracy.

This application relates to the field of demulsifiers, and more specifically, to an oil sludge demulsifier, its preparation method, and its application. An oil sludge demulsifier comprises the following components in the following mass ratio: 20-35 parts of a surfactant complex, 7-12 parts of an alkyl sulfate sodium cosolvent, 0.6-1.8 parts of a stabilizer, and 48-55 parts of water; wherein the surfactant complex comprises hyperbranched polyamide amine and polyether amine modified magnetic nanoparticles. This oil sludge demulsifier improves upon the problems of existing demulsifiers, such as low dehydration capacity, slow dehydration speed, poor demulsification effect, and low oil content, thereby improving the demulsification performance and dehydration efficiency, and achieving effective separation of oil sludge.

This utility model discloses a dust collector hopper unclogging structure, relating to the technical field of baghouse dust collectors. It includes a dust hopper with a folded plate fixedly connected to its right side. A vibration striking mechanism is also provided on the right side of the dust hopper. The vibration striking mechanism includes a corrugated plate fixedly connected to the bottom of the folded plate, the corrugated plate being angled. A fixing plate is fixedly connected to the right side of the dust hopper, and an electric push rod is fixedly connected to the bottom of the fixing plate. A square plate is fixedly connected to the bottom of the electric push rod. The electric push rod drives the square plate and the striking rod to move along the specifically angled corrugated plate, causing the striking rod to generate regular reciprocating lateral vibration that directly acts on the side wall of the dust hopper. This method can effectively transmit mechanical vibration force, generating continuous and multi-directional vibration force, which can effectively break up firmly adhered dust clumps on the inner wall of the dust hopper, solving the problems of insufficient impact force and difficulty in handling sticky and wet clumps caused by a single air-blowing method.

The utility model discloses a reinforced well cementation casing centralizer tool, the main body structure adopts the seamless steel pipe of spring steel, after cutting, the integral main body structure of further processing is formed after the integral processing, the upper sleeve and the lower sleeve of accommodating and sleeving in casing are located in the upper and lower both ends, and the multiple centralizing ribs of longitudinal arrangement between the upper sleeve and the lower sleeve and in the middle part, multiple centralizing ribs are arranged on the outer peripheral surface of upper sleeve and lower sleeve along the circumferential direction of upper sleeve and lower sleeve and are integrally formed connection with upper sleeve and lower sleeve, and the centralizing rib is outwardly inclined from the upper and lower both ends to the axis of casing, and a stress groove is arranged in the middle position of each centralizing rib to increase the reset force after deformation, and the fluid flow channel is formed between the adjacent two centralizing ribs, and the brush is fixed on the outside of upper sleeve and lower sleeve, and the brush is in contact with the well wall to destroy and remove the well wall mud cake. The application can ensure that the casing can smoothly enter the well, and improve the well cementation quality.

The invention discloses a fried dough twist fermentation device, and belongs to the field of food production.The fried dough twist fermentation device comprises a metal base, a fermentation box is fixedly connected to the edge of the top of the metal base, a box door is hinged to one side of the front end of the fermentation box, and placing assemblies are arranged on the two sides of the interior of the metal base; atomization and humidification assemblies are arranged on the two sides of the interior of the metal base, and a dehumidification assembly used for absorbing water vapor in air is arranged on one side of the back face of the fermentation box. According to the device, outside air needs to pass through the dehumidification unit before entering the fermentation box, a silica gel desiccant in the dehumidification unit can adsorb water vapor in the air, and dry air is conveyed into the fermentation box, so that the inner wall of the device is prevented from being dewed after cooling, residual water drops drop on the surface of fried dough twist, secondary damp is caused, and the fermentation effect is improved. And air flows from top to bottom and from middle to two sides, so that heat accumulation at the top or the bottom in the device is avoided, and the heat dissipation rate is high.

The utility model discloses a combined biochemical pool foam removing device which comprises a mounting plate, fixing frames are arranged on the two sides of the mounting plate, a mechanical foam removing mechanism and a spraying mechanism located on the periphery of the mechanical foam removing mechanism are arranged on the mounting plate, the mechanical foam removing mechanism comprises a waterproof motor arranged on the mounting plate, a foam removing box is arranged below the mounting plate, and the spraying mechanism is arranged on the periphery of the mechanical foam removing mechanism. An output shaft of the waterproof motor is provided with a rotating shaft which penetrates through the mounting plate and extends into the defoaming box, the rotating shaft is provided with at least two groups of upper and lower impellers and a plurality of defoaming rods located between the adjacent impellers, the surface of each defoaming rod is provided with a plurality of defoaming needles, the bottom of the defoaming box is provided with a defoaming groove, and the side surface of the defoaming box is provided with a liquid outlet hole; a lifting mechanism for driving the defoaming box to move up and down is also arranged between the mounting plate and the defoaming box. The device has the characteristics of reducing the cost and efficiently removing bubbles.

The invention discloses a plastic package power module with double-sided water cooling and full CLIP connection. The plastic package power module comprises an upper bridge module assembly, a lower bridge module assembly, a plastic package body and a double-sided heat dissipation assembly. The upper bridge module assembly comprises a first DBC board, a plurality of upper bridge chips connected in parallel, a first connecting copper bar and a first signal copper bar, the first connecting copper bar is of an integrally-formed structure, all the upper bridge chips are connected in parallel through a first chip pin, a second chip pin and a copper layer pin which are vertically arranged, traditional lead bonding is replaced, and the upper bridge chips are connected in parallel through the first chip pin, the second chip pin and the copper layer pin. And high-current transmission and mechanical support of low parasitic inductance are realized. The first signal copper bar is located between the two rows of upper bridge chips, driving signals are synchronously transmitted to all the chips through the auxiliary copper bars, switch synchronism is ensured, and the parasitic inductance and synchronism defects of lead bonding are eliminated. The double-face heat dissipation assembly is attached to the upper module and the lower module, through the design of the branch flow channels and the main flow channels in the flow channel grooves, the retention path of cooling liquid is prolonged, the flow is evenly distributed, and the heat dissipation efficiency is improved.

This invention discloses a MEMS synthetic jet heat sink and array heat sink based on an asymmetric dual-diaphragm and a top-surface through-flow channel, comprising a PCB substrate, a silicon substrate, a first piezoelectric diaphragm, a second piezoelectric diaphragm, and a top frame. The lower surface of the PCB substrate is used for mounting to a heat source and is a complete plane; the silicon substrate is disposed on the PCB substrate, and a vibration cavity is formed within the silicon substrate; the first and second piezoelectric diaphragms are sealed and connected to the silicon substrate, and together enclose the vibration cavity; the two piezoelectric diaphragms are arranged asymmetrically relative to the PCB substrate; the top frame is disposed above the first and second piezoelectric diaphragms and connected to the PCB substrate; the top frame has an opening; the opening communicates with the vibration cavity, together forming a top-surface through-flow bidirectional channel, so that the air intake and exhaust processes of the heat sink are completed through the top-surface through-flow bidirectional channel.