2335results about How to "Avoid corrosion" patented technology

The invention discloses a communication network power distribution cabinet convenient for heat dissipation, and relates to the technical field of power distribution cabinets, and the power distribution cabinet comprises a composite mechanism. According to the communication network power distribution cabinet convenient to dissipate heat, through the design of a composite mechanism, the box body shell is used for storing electronic components, after long-time operation, the temperature in the box body shell rises, hot gas rises, and then the hot gas flows to the processing mechanism from the circular groove, so that the heat dissipation effect is achieved, and the internal temperature of equipment is reduced; the ventilation mechanisms are arranged on the two sides of the box body shell, so that the convection effect is achieved, the cold air flowing effect is improved, the cold air is located at the low position with the high density, hot air is squeezed upwards after entering the box body shell, the discharging speed is increased, and the heat dissipation efficiency is improved. The box body shell is supported through the supporting assembly, so that the effect of reducing deformation of the box body is achieved, and internal electronic elements are protected.

The invention provides a welding device for ship repair, and belongs to the technical field of welding. Comprising a base, a supporting plate is fixedly arranged on the surface of the base, a sliding plate is arranged on the inner wall of the supporting plate in a sliding mode, a welding gun for welding the ship welding position is installed on the surface of the sliding plate, and a cleaning part for cleaning welding slag generated during welding of the welding gun is installed on the surface of the sliding plate; by arranging the cleaning part, welding can be carried out while the whole equipment is moved, welding slag generated by welding at the welding position can be adsorbed during welding, splashing of the welding slag is prevented, a pipeline can be knocked through cooperative work of a motor, a rotating rod, a round wheel, a connecting rod, a sliding block, a downward pressing rod, a torsion spring, a rotating strip, a spring hammer and other components, and therefore the pipeline can be conveniently welded. Welding slag in the pipeline is knocked off due to vibration and sucked away by the fan, cleaning of the welding slag adsorbed to the inner wall of the pipeline is achieved, smoothness of the pipeline is guaranteed, and attachment of the welding slag to the inner wall of the pipeline is effectively reduced.

The invention provides a display panel, a preparation method thereof and a display device. The display panel comprises a substrate, a first electrode layer, a pixel defining layer and an isolation structure. The first electrode layer is arranged on one side of the substrate, the pixel limiting layer is arranged on the side, away from the substrate, of the first electrode layer, and the isolation structure is arranged on the side, away from the substrate, of the pixel limiting layer. Wherein the pixel limiting layer comprises a pixel limiting part and a pixel opening, the pixel limiting part comprises a first side wall making contact with the first electrode layer, and the included angle between the first side wall and the plane where the substrate is located is a right angle.

The invention provides an ultrahigh-ductility cement-based composite material for ocean engineering and a preparation method of the ultrahigh-ductility cement-based composite material for ocean engineering. The concrete is prepared from the following raw materials in parts by weight: 250 to 500 parts of cement clinker, 400 to 600 parts of fly ash, 200 to 300 parts of mineral powder, 100 to 150 parts of silica fume, 160 to 240 parts of metakaolin, 600 to 900 parts of quartz sand, 10 to 20 parts of organic synthetic fiber, 20 to 30 parts of organic corrosion inhibitor, 180 to 240 parts of water and 1 to 8 parts of water reducing agent. The organic corrosion inhibitor provided by the invention can be combined with chloride ions to form a passive film, so that the corrosion of reinforcing steel bars and the invasion of the chloride ions into concrete are inhibited, and the durability of the concrete is improved; by regulating and controlling the mixing ratio of the four mineral admixtures and the mixing amount of the synthetic fiber component, the concrete can well consider high strength, high ductility, high durability, high flow state and excellent deformation resistance. The ultrahigh-ductility concrete for ocean engineering, which can meet the toughness requirements of high compression resistance, fracture resistance and impact resistance and the requirements of high chloride ion permeation resistance and steel bar corrosion resistance, can be obtained.

The invention discloses a flue gas emission continuous monitoring device and a monitoring method, and relates to the technical field of flue gas emission, the device realizes gas inlet detection and multidirectional gas inlet and gas exhaust of cleaning pipelines and parts through a U-shaped gas inlet pipe, a preheating pipe, a first gas return pipe, a first gas inlet pipe, a gas collection chamber, a condensation pipe, a liquid collection chamber and a second gas return pipe; preheating and heat preservation are achieved through air inlet and air outlet, heat preservation measurement is achieved in the heat preservation shell, pipelines and parts, interference of temperature, oil and particulate matter is effectively reduced, and the monitoring precision is improved; the laser scattering sensor is used for measuring the concentration and the particle size of particulate matters, the optical fiber measuring unit is used for monitoring other components in flue gas, and real-time monitoring and emission component analysis of the flue gas are realized by collecting released liquid and measuring substances dissolved in the liquid; the problems that smoke monitoring is easy to interfere, detection data are easy to fluctuate, and a multi-operation-mode switching technology of a detection device is lacked, so that the smoke monitoring precision is low are solved.

The utility model belongs to the technical field of spray cleaning, and discloses a spray device. The spraying device comprises a cleaning pipe, a connecting piece and a spraying head. Wherein the cleaning pipe is used for introducing fluid; one end of the connecting piece is communicated with the cleaning pipe, a blocking piece and an elastic piece are arranged in the connecting piece, one end of the blocking piece can block the end, communicated with the cleaning pipe, of the connecting piece, the other end of the blocking piece is connected or connected with the elastic piece in an abutting mode, and fluid can overcome the elastic force of the elastic piece to enable the blocking piece to move in the direction away from the cleaning pipe. Fluid can enter the connecting piece; the spray head is communicated to the other end of the connecting piece and provided with spray holes, and fluid can be sprayed out of the spray holes. When the spraying device is used, fluid can compress the elastic piece through the plugging piece, so that the fluid can enter the spraying head and be sprayed out; after use, under the action of the elastic piece, the blocking piece blocks the end, communicated with the cleaning pipe, of the connecting piece again, so that the cleaning pipe is sealed, and the service life of the cleaning pipe is prolonged.

The invention provides a new energy automobile charging pile, and particularly relates to the technical field of charging piles, the new energy automobile charging pile comprises a charging pile main body, a gun placing groove is formed in one side of the charging pile main body, a charging gun is placed in the gun placing groove, and a protective cover is fixedly arranged at the position, corresponding to the gun placing groove, of one side of the charging pile main body; through cooperation of parts such as a wire storage box and a winding shaft, a charging wire is protected, a conical barrel is attached to the outer wall of the charging wire to perform reciprocating horizontal displacement, dust and impurities attached to the outer wall of the charging wire are scraped off, and under the action of a circular scraper, the charging wire is prevented from being scraped off. And stubborn impurities attached to the outer wall of the charging wire or an ice layer condensed on the outer wall of the charging wire in winter can be further effectively removed, so that the impurities attached to the outer wall of the charging wire can be automatically removed after the charging wire is used every time, the charging wire is prevented from being corroded by some impurities, the use safety of the charging wire is ensured, and the service life of the charging wire is prolonged. And the service life is prolonged.

The utility model relates to the technical field of wearable electrode materials, in particular to a signal acquisition structure and a patch detection device with the same. The signal acquisition structure provided by the utility model comprises a flexible printed circuit and an adhesive layer, the flexible printed circuit comprises a base material layer and a circuit layer located on the base material layer; the circuit layer comprises a plurality of conductive traces and a plurality of electrode parts, and the adhesive layer covers part of the flexible printed circuit and does not cover the plurality of electrode parts. According to the signal acquisition structure provided by the utility model, the adhesive layer is arranged outside the flexible printed circuit, so that the skin attaching performance when the signal acquisition structure is used can be improved, the user experience can be improved, meanwhile, one surface of the flexible printed circuit can be always fixed at a specific position on a human body, the stability of signal transmission is enhanced, and the service life of the flexible printed circuit is prolonged. And the reliability of detection data is improved.

The invention relates to the technical field of heat exchange unit optimization control, and discloses a standardized heat exchange unit circulating water and water supplementing optimization control method which comprises the following steps: S1, in a heat exchange unit circulating water system, installing a plurality of sensors, collecting data in real time, and establishing a database to record parameter changes; s2, analyzing the multi-parameter data monitored in real time by using an intelligent prediction algorithm; s3, according to a temperature change prediction result, determining the adjustment requirements of the water supplementing temperature and the water supplementing amount, and adjusting the water supplementing temperature in advance based on the prediction model to realize accurate control; and S4, monitoring the temperature, the flow, the pressure and the environment temperature of the circulating water in real time. By means of multi-parameter real-time monitoring and intelligent control over the circulating water and water supplementing system of the heat exchange unit, accurate adjustment of the water supplementing temperature and the water supplementing amount is achieved, the problem that temperature lag control is not accurate in a traditional system is solved, the heat exchange efficiency is improved, and energy consumption is reduced.

The invention discloses an environment-friendly safe low-smoke halogen-free cable, and relates to the technical field of cables, the environment-friendly safe low-smoke halogen-free cable comprises a cable assembly, the cable assembly comprises an outer sheath, the outer surface of the outer sheath is fixedly communicated with an air outlet assembly, a plurality of conductors are arranged in the outer sheath, each conductor is hollow, and the outer surface of the outer sheath is fixedly communicated with the air outlet assembly. A plurality of filling pipes are arranged among the exteriors of the plurality of conductors, and the plurality of filling pipes are hollow; according to the environment-friendly safe low-smoke halogen-free cable, when the temperature of air around the cable is low, cold air enters the hollow conductor from the air inlet, air convection is formed in the conductor, heat is taken away and then discharged from the air outlet, and when excessive heat is generated in the use process of the conductor, the heat can enter the filling pipe through the multiple drainage holes, so that the cable is protected. And heat can flow in the conductor, so that excessive local heat dissipation of the conductor can be prevented.

The invention discloses an efficient sewage treatment device based on a magnetic separation technology, and relates to the technical field of sewage treatment, and the efficient sewage treatment device comprises a composite mechanism. According to the efficient sewage treatment device based on the magnetic separation technology, through the design of a composite mechanism, sewage enters the composite shell from a feeding pipe, impurities in the sewage are adsorbed through a filter plate, so that the effect of purifying the sewage is achieved, the contact area is increased by forming a plate surface groove and opening the groove, the filter effect is improved, and the service life of parts is prolonged; a first electric push rod controls an annular plate to rub a filter plate up and down in the composite shell, so that the effect of cleaning impurities on the surface is achieved, impurity precipitation is reduced, the rubbed impurities are precipitated towards an output mechanism, subsequent discharge from the output mechanism is facilitated, filtered sewage is discharged from a discharge pipe, and subsequent operation is facilitated.

The invention discloses homogeneous stirring equipment for preparing cold water fish feed grease, and relates to the technical field of stirring, and the homogeneous stirring equipment comprises a bin body mechanism. According to the homogenizing and stirring equipment for preparing the cold water fish feed grease, through the design of the bin body mechanism, materials enter from the top of the processing mechanism, circulate and enter the bin body shell, then a motor is started, a central rotating shaft is controlled by the motor to rotate, and the interiors of the materials are rotated by paddle plates, so that the effect of mixing the materials is achieved; through the design of the multiple paddle plates, the stirring range is enlarged, the mixing efficiency is improved, the uniform mixing effect is achieved, the paddle plate grooves are formed, the rotating efficiency is improved through the grooves, the grooves can disturb boundary layers on the surfaces of the paddle plates, resistance is reduced, the flowing efficiency of fluid is improved, and therefore the stirring effect of the paddle plates in the fluid is enhanced; cavitation and cavitation phenomena are reduced, the possibility of generating cavitation and cavitation under high-speed movement is reduced, and the service life of the paddle board is prolonged.

The utility model relates to a gas pipeline connecting device which comprises a left pipeline and a right pipeline. The device further comprises a protection part. The opposite ends of the left pipeline and the right pipeline are connected with a left flange plate and a right flange plate respectively, an elastic cushion is fixed to the right side face of the left flange plate, and the left flange plate and the right flange plate are connected through a plurality of connecting bolts. U-shaped grooves are formed in the upper ends of the outer ring faces of the left flange plate and the right flange plate, the protection piece comprises a protection ring, a vertical plate, a screw and a pressing rod, the left flange plate and the right flange plate are jointly sleeved with the protection ring, the right portion of the pressing rod stretches into the U-shaped grooves of the left flange plate and the right flange plate, and the right portion of the pressing rod downwards abuts against the upper end of the protection ring. The upper end of the protection ring is in a U shape and located in the two U-shaped grooves. The utility model solves the problems that the joint of the gas pipeline is easy to leak and the gasket between the flange plates is easy to corrode.

The invention provides an automatic spraying cooling method for an air cooling island, and solves the problems that an existing air cooling island auxiliary cooling spraying device is complex in structure, and a spraying cooling control and adjustment method is complex, and according to the technical scheme, the cooling method comprises the following steps that an air cooling island automatic spraying cooling system is arranged on the air cooling island; checking equipment and a control system; opening water supply and opening a water inlet valve of a water supply system; adjusting pressure to start spraying; cooling is controlled, and a PLC of the master control cabinet judges according to a preset temperature threshold value; monitoring parameters; and observing the spraying effect. The system can automatically perform spray cooling according to the real-time temperature of the air cooling island, strengthen the cooling effect of the air cooling island, increase the air humidity, prevent corrosion and dust accumulation, cope with the environment temperature change, reduce the operation of cooling auxiliary equipment, relieve the thermal stress of the air cooling island, assist in improving the cooling efficiency of the air cooling island, improve the output of a generator set and save energy.

The invention belongs to the field of secondary batteries, and particularly relates to an aqueous zinc ion battery electrolyte additive and an electrolyte. The additive is a beta-diketone organic reagent. When the additive is added into the zinc salt-containing electrolyte, dendritic crystal growth and hydrogen evolution corrosion of zinc can be remarkably inhibited, so that the cycle performance and coulombic efficiency of the zinc ion battery are improved. According to the invention, the zinc ion battery has good cycle performance, is easy for industrial production, and has an application prospect in the technical field of energy storage.

The invention relates to the technical field of bactericides, and discloses an oilfield flooding bactericide containing plant bactericidal components and a preparation method thereof. The preparation method comprises the following steps: loading the plant-based traditional Chinese medicine extract and the isothiazolinone-based corrosion inhibitor on the silver-loaded cyclodextrin metal organic framework to prepare an antibacterial agent / silver-loaded cyclodextrin metal organic framework composite material, and mixing the antibacterial agent / silver-loaded cyclodextrin metal organic framework composite material with methyl methacrylate to prepare the antibacterial agent / silver-loaded cyclodextrin metal organic framework composite material. The bactericide obtained by carrying out copolymerization reaction on modified hydroxyquinoline, vinyl quaternary phosphonium salt and methacrylic acid through an in-situ polymerization method can effectively kill and inhibit the breeding of sulfate reducing bacteria and other bacteria in oilfield reinjection water, and has a certain corrosion inhibition effect.

The invention discloses a multi-point grounding current limiting device, and relates to the technical field of power transmission line construction, the multi-point grounding current limiting device comprises a placement frame and further comprises a protection assembly, a grounding rod is fixedly installed at the bottom of the placement frame, a placement plate is fixedly installed on the inner wall of the placement frame, and a placement rod is fixedly installed at the top of the placement plate; lifting equipment is arranged on the circumferential surface of the placement rod, a signal receiver is fixedly mounted at the top of the lifting equipment, a current limiting assembly is arranged at the top of the placement plate, a fusing assembly is arranged at the top of the placement plate, a grounding connecting wire is arranged between the fusing assembly and the current limiting assembly, and a limiting frame is fixedly mounted at the top of the placement plate. According to the grounding current limiting device, the L-shaped plate moves downwards to drive the limiting plate to move downwards, the limiting plate moves downwards to make contact with the grounding connecting wire and extrude and fix the grounding connecting wire, the optimal state of the grounding connecting wire can be kept by avoiding bending or pulling, low grounding resistance is ensured, and therefore the efficiency and safety of the grounding current limiting device are improved.

The invention relates to the technical field of cable plugs, in particular to a cable plug capable of being quickly butted and separated. Comprising a first sleeve shell, an internal threaded pipe and a second sleeve shell, the internal threaded pipe is rotationally arranged on the first sleeve shell, a threaded groove is formed in the outer side of the second sleeve shell, a socket is arranged in the second sleeve shell, and a plug is arranged in the first sleeve shell. Through cooperation of the socket, the plug, the current-conducting plate, the sliding block, the fastening block and the screw rod, all wires in a cable can be in butt joint with the plug or the socket at a time, time and labor are saved, operation is convenient, errors are not likely to happen, and then by screwing an inner threaded pipe into a threaded groove or screwing the inner threaded pipe out of the threaded groove, the cable can be conveniently and rapidly connected. When the socket and the plug are in butt joint, the socket and the plug can be quickly in butt joint or separated, and when the socket and the plug are in butt joint, the air bag can be automatically utilized to seal the joint between the first sleeve shell and the second sleeve shell, so that moisture is prevented from invading into the first sleeve shell and the second sleeve shell, and short circuit or corrosion of the socket or the plug is avoided.

The invention provides a sulfate-containing waste liquid treatment system and a sulfate-containing waste liquid treatment method for acrylonitrile and a combination device thereof, the system comprises at least two sets of waste liquid treatment units and a set of flue gas treatment unit, sulfate waste liquid is divided into two strands to enter the two sets of waste liquid treatment units for combustion, waste heat utilization and quenching purification, the discharged sulfur-containing flue gas is collected and enters a set of flue gas treatment unit, the sulfur-containing flue gas subjected to deep cooling, demisting and drying can be directly used for producing high-purity sulfuric acid, and a two-end and one-tail mode is adopted, so that the operation flexibility of the system is improved, and the treatment pressure is reduced. In the waste liquid treatment unit, a high-temperature reaction device adopts segmented air distribution, so that sufficient combustion of waste liquid is ensured, and SO2 loss is reduced; a special temperature field and structural design in the waste heat boiler can prevent the heat exchange device from scaling and blocking; a venturi scrubber is adopted in the quenching purification device to quench the flue gas, and a protective liquid film is formed on the contact interface of the high-temperature flue gas and a liquid phase, so that the temperature of equipment is effectively reduced, and corrosion of the high-temperature flue gas is prevented.

The utility model relates to the technical field of hydraulic supporting rod protection, and discloses a hydraulic supporting rod protection structure which comprises a hydraulic rod, fixing supports are installed at the top and the bottom of the hydraulic rod respectively, a motor support is installed at the top of the hydraulic rod, and a motor is installed at the bottom of the motor support. The inner side of the fixing support is connected with a threaded rod through a bearing, and the inner side of the threaded rod is meshed with a gear cleaning mechanism. And the gear cleaning mechanism is connected with the hydraulic rod in a sleeving mode and comprises a spraying gear and a cleaning gear, a water injection groove is formed in the outer side of the spraying gear, a nozzle is formed in the inner side of the spraying gear, and a cleaning layer is arranged in the cleaning gear. According to the hydraulic supporting rod protection structure, the working efficiency can be improved through the gear cleaning mechanism, manual cleaning of the hydraulic supporting rod is time-consuming and labor-consuming, the surface of the rod body can be directly cleaned through the gear cleaning mechanism, and therefore the labor cost and the time cost are reduced.

The invention discloses multi-stage wastewater treatment equipment for fabric disinfectant production, and relates to the technical field of wastewater treatment.The multi-stage wastewater treatment equipment for fabric disinfectant production comprises a filtering bin, a shielding cover is detachably and fixedly installed at the top end of the filtering bin, and a water inlet pipe is fixedly communicated with the center of the top of the shielding cover; the auxiliary stirring mechanism comprises a rotating part which is rotationally connected to the center position of the bottom of the inner wall of the filtering bin; the compression of the supporting spring and the compression of the buffer spring are synchronously carried out, when the flow of waste water is reduced or the impact force applied by the flow to the trapezoidal block is changed, the acting force on the supporting spring and the buffer spring is reduced, and the supporting spring and the buffer spring tend to rebound upwards, so that the filter screen is further buffered through the supporting spring and the buffer spring; meanwhile, the filter screen vibrates in the using process, and the situation that the filter screen is blocked by large-particle impurities, and preliminary filtration of the wastewater is affected is avoided.

The invention provides a preparation method of an ETFE fluorofilm plate with excellent comprehensive performance, and belongs to the technical field of manufacturing of high-performance building materials. According to the preparation method, a metal plate plated with an aluminum-zinc alloy film layer serves as a substrate, and the upper surface and the lower surface of the substrate are each provided with a composite plating layer. The composite coating comprises a silicon dioxide-carbon tube coating, an indium tin oxide coating, a wear-resistant layer, an ETFE fluorine film layer and a wear-resistant hydrophobic layer. The ETFE fluorine diaphragm plate prepared by the method not only has excellent corrosion resistance and excellent heat insulation performance, but also has good scratch-resistant protection and weather resistance, and particularly, the coated wear-resistant hydrophobic layer effectively reduces the adhesion of moisture on the surface of the diaphragm plate, improves the self-cleaning performance of the diaphragm plate, reduces the maintenance cost, and is suitable for large-scale popularization and application. The introduction of the layer not only protects the surface of the film, but also enhances the stability of the film in the long-term use process. The ETFE fluorine film plate prepared by the method is suitable for various high-performance building requirements, and shows a wide application prospect.

The invention discloses a pruning device for planting horticultural crops. The pruning device comprises a machine shell, and two protective shells are symmetrically and fixedly connected to the inner wall of the machine shell; the removing mechanism comprises two mounting frames which are symmetrically and fixedly connected to the inner wall of the machine shell, sliding blocks are slidably connected to the inner walls of the two mounting frames, fixing rods are fixedly connected to the side walls of the sliding blocks, cutters are fixedly connected to the other ends of the fixing rods, and the cutters are located in the protective shell; the cleaning mechanism comprises two first rotating shafts which are symmetrically and rotatably connected to the inner wall of the protective shell, two cleaning sponges are symmetrically and fixedly connected to the side walls of the two first rotating shafts, a liquid inlet groove is formed in each first rotating shaft, and a plurality of liquid outlet holes are formed in the inner wall of each liquid inlet groove. The micro motor is driven to rotate in the forward direction, the cutter can be driven to cut off branches or leaves to be trimmed, so that the branches or the leaves are removed, the removing efficiency is high, the labor intensity of workers is reduced, disinfectants or nutritional agents can be sprayed, and crops are promoted to be robust.

The centrifugal fan comprises a fan shell, an air inlet, an air guide wheel and an air outlet, the air inlet is formed in the bottom of the fan shell, the air guide wheel is rotationally connected to the upper portion of the air inlet and driven by a motor on the inner wall of the fan shell, the air outlet is formed in the outer wall of the fan shell, and the air outlet is rotationally connected to the upper portion of the air inlet. An energy-saving assembly used for assisting in air inlet is arranged below the air inlet, a separation assembly used for separating diffuse particles and impurities is arranged in the fan shell, the purpose of collecting the particles and the impurities is achieved through the arrangement of the separation assembly, and compared with a traditional centrifugal fan which depends on a simple filter screen or gravity sedimentation and other modes, the energy-saving effect is better. Compared with the prior art, the device has a better separation effect on small particles and impurities with different densities, improves the purity of exhausted gas, achieves the purpose of collecting the particles and the impurities, and avoids the problems of increase of airflow resistance, fluctuation of air volume and air pressure and the like caused by impurity accumulation.

The invention relates to an offshore wind turbine large-diameter steel pipe pile prestress core grouting-solidified soil combined reinforcing system, and provides two supporting system conversion platforms, namely a floating supporting platform and a hoop supporting platform, and different working platforms can be flexibly selected according to the depth of seawater. The two working platforms can provide stable and reliable support for the fan supporting column, and it is guaranteed that reinforcing work is smoothly carried out; the fan pipe pile is internally provided with the stiff reinforcing steel frame, the damaged fan pipe pile can be reinforced, the micro-expansive concrete poured in the fan pipe pile can prevent corrosion of the stiff steel frame, the integrity of the stiff steel bar in the fan pipe pile is improved, and the bearing capacity of the structure is guaranteed; anchoring steel pipe piles are driven into the seabed on the periphery of the fan pipe pile, the fan pipe pile is tensioned and anchored through the prestress traction ribs, and the stability of the fan pipe pile is improved.

The utility model relates to the field of corrugated pipes, in particular to a corrugated hose for fuel gas, which comprises a corrugated pipe sleeved with a corrosion-resistant metal mesh layer. According to the corrugated hose for the fuel gas, the corrugated pipe, the first threaded connector, the limiting groove, the adapter, the second threaded connector, the first sealing ring, the second sealing ring, the outer cylinder, the elastic piece, the limiting block and the outer nut are arranged, and the adapter is in butt joint with the corrugated pipe; an outer cylinder outside the adapter, an elastic piece and a limiting block extend into a limiting groove in the first threaded connector, the limiting block can be clamped in the limiting groove to form clamping butt joint, then the corrugated pipe and the adapter are in threaded connection by rotating an outer nut outside the adapter, and meanwhile the sealing effect is achieved through the arrangement of a first sealing ring and a second sealing ring; the connection mode enhances the firmness and the sealing performance between the two parts.

The utility model discloses a bridge pile foundation drilling device, which relates to the technical field of pile foundation drilling equipment and comprises a drilling machine base, a drilling machine frame fixed on the surface of the top of the drilling machine base and a drill rod lifting machine arranged on the front side of the drilling machine frame and moving up and down. And a drill bit cleaning component is arranged at the bottom of the front side surface of the drilling machine rack, a motor is fixed to the front side surface of the drill rod lifting machine, a drill rod is installed at the output end of the motor through a coupler, and the drill rod penetrates through the interior of the drill bit cleaning component. According to the utility model, the drill bit cleaning part sleeved on the outer surface of the drill rod is arranged on the front side of the drilling machine rack, the silt loosening agent in the outer-layer water tank is pushed by the air pump to be sprayed to the surface of the drill rod, and then clear water is conveyed into the spray head on the intersection pipe through the water pump and the pipe fitting, so that the pre-cleaning and the conventional cleaning after the drill rod is pulled out are realized; and the drill rod has certain cleanliness after being unearthed, and meanwhile, silt and the like can be prevented from being attached to the drill rod to corrode the drill rod.

The invention provides a back contact battery with a specific contact layer and a preparation method of the back contact battery. The back contact battery with the specific contact layer comprises a silicon wafer, a first semiconductor layer and a second semiconductor layer, the silicon wafer has a backlight surface and a light receiving surface; the first semiconductor layers and the second semiconductor layers are alternately arranged on the backlight surface; the first semiconductor layer at least comprises an N-type doped polycrystalline silicon layer, the N-type doped polycrystalline silicon layer comprises a hydrogen-doped N-type polycrystalline silicon layer and a deuterium-doped N-type polycrystalline silicon layer, the second semiconductor layer at least comprises a P-type doped amorphous silicon layer, and the P-type doped amorphous silicon layer comprises a hydrogen-doped P-type amorphous silicon layer and a deuterium-doped P-type amorphous silicon layer. The surface compactness and stability of the first semiconductor layer and the second semiconductor layer can be greatly improved, the surfaces of the two semiconductor layers are prevented from being naturally oxidized or corroded by a solution in the manufacturing process, then the contact resistance between the first semiconductor layer and the transparent conductive layer and between the second semiconductor layer and the transparent conductive layer is reduced, and the FF of the cell is improved.

The invention discloses a fuel cell metal bipolar plate with a multi-layer composite gradient coating and a preparation method of the fuel cell metal bipolar plate, and relates to a preparation method of a surface coating of a fuel cell metal bipolar plate. The problem that a metal bipolar plate in a fuel cell is poor in corrosion resistance is solved. The Ti / TiN / TiCN multi-layer composite gradient is prepared on a substrate through a multi-arc ion plating technology by regulating and controlling parameters such as air pressure and flow of nitrogen and methane, the coating is composed of a pure Ti base layer and a transition layer with three to five periods, a gradient multi-layer structure is adopted, TiN metal nitride with good conductivity is adopted, and the conductivity of the coating is greatly improved. The interface contact resistance is reduced, meanwhile, the permeation of corrosive liquid and the further corrosion of the corrosive liquid to the coating and the matrix material are effectively prevented, the corrosion resistance of the metal bipolar plate in an acid environment is remarkably improved, and the interface contact resistance of the surface of the metal bipolar plate under the working pressure of a fuel cell is reduced.

The high-temperature fan of the granulating and drying hot-blast stove relates to the technical field of compound fertilizer processing and production and comprises a base, a bearing support is fixed to the rear end of the base, a main shaft is rotationally installed in the middle of the bearing support, a main umbrella wheel is coaxially arranged at the input end of the main shaft, and trapezoidal fins are fixed to the position, close to the main umbrella wheel, of the rear end of the main shaft; the spindle is sleeved with a shaft sleeve, and a labyrinth seal is arranged at the front end of the shaft sleeve. In the using process, only one motor needs to be arranged, energy is supplied to the high-temperature fan, meanwhile, automatic circulation of cooling water is achieved through linkage driving of the circulation assembly, heat exchange cooling is conducted on the circulating cooling water through the cooling fan, and due to the fact that compressor refrigeration and water pump circulation do not need to be used, the cooling efficiency is greatly improved. Therefore, efficient circulating cooling of the cooling water can be achieved with a simple structure and extremely low cost, the problem of abrasion between parts of the fan caused by high-temperature expansion is solved, and heat transmitted to the bearing from a high-temperature medium is effectively controlled.