704results about How to "Increase force" patented technology

The invention discloses a combination of different nucleic acid aptamers with known 291 targets, sequences of the nucleic acid aptamers of the combination are subjected to sequencing analysis through a single-cell high-throughput sequencing technology, and a cell map aiming at peripheral blood-derived mononuclear cells of a biliary tract cancer patient can be constructed. The nucleic acid aptamers covered by the combination have high specific affinity to molecular targets of the nucleic acid aptamers, and after the two ends of the nucleic acid aptamer sequences extend to adapt to joints of a commercial sequencing platform, high-throughput sequencing is carried out on the nucleic acid aptamer sequences which are combined with the surfaces of mononuclear cells and are provided with the sequencing joints; high-throughput analysis of the biomarkers on the surface of the peripheral blood-derived mononuclear cell of a biliary tract cancer patient can be realized, so that the cell map of the peripheral blood-derived mononuclear cell of the biliary tract cancer is constructed.

The invention provides a precast pile, a combined pile and a construction method, and relates to the technical field of pile foundation construction.The precast pile comprises a first pile body, a second pile body and a third pile body, the first thickened protrusions are fixed to the peripheral wall of the first pile body and arranged in the length direction of the first pile body at intervals; the first annular protrusion is fixed to the first pile body in a surrounding mode, and the at least one first thickened protrusion is located between the first annular protrusion and the second end; when the precast pile is placed in the drill hole, the projection of the inner peripheral wall of the drill hole in the length direction of the first pile body surrounds the outer side of the projection of the combination body of the first pile body and the first thickened protrusion in the length direction of the first pile body, and the projection of the first annular protrusion in the length direction of the first pile body completely covers the projection of the inner peripheral wall of the drill hole in the length direction of the first pile body. After construction of the combined pile comprising the precast pile is completed, the bearing capacity of the combined pile can be improved.

The invention relates to the technical field of reverse osmosis membranes, in particular to a polyamide reverse osmosis membrane for high-salinity wastewater treatment and a preparation method of the polyamide reverse osmosis membrane. The invention solves the problem that the polyamide reverse osmosis membrane cannot give consideration to both desalination rate and water flux. The polyamide reverse osmosis membrane comprises a polyester non-woven fabric layer, a polysulfone porous layer, a transition layer and a polyamide layer. The polysulfone porous layer is prepared, and the modified pore-forming agent is added to improve the water flux of the reverse osmosis membrane; the hydrophilicity of the reverse osmosis membrane is improved by preparing the transition layer and adding a hydrophilic auxiliary agent when the polyamide layer is prepared; the flux attenuation rate of the polyamide reverse osmosis membrane is reduced by preparing the polyamide layer; the desalination rate of the reverse osmosis membrane is improved by introducing a composite ion complexing agent and graphene quantum dots into the polyamide layer.

The invention provides a method and system for cleaning a ship oil flow pipeline, and the method comprises the steps: obtaining a first Reynolds number of flowing oil in each branch of the ship oil flow pipeline, and comparing the first Reynolds number with a critical Reynolds number; and acquiring the pollution grade of pollutants in each branch of the ship oil flow pipeline, and if the pollution grade is greater than a set value, judging that the ship oil flow pipeline needs series washing. According to the comparison result of the first Reynolds number and the critical Reynolds number, on the premise that series washing needs to be conducted on the ship oil flow pipeline, if the first Reynolds number is larger than or equal to the critical Reynolds number, flowing oil in all branches of the ship oil flow pipeline is in a turbulent flow state, the flowing oil can exert strong acting force on the pipe walls of all the branches during series washing, and therefore series washing is conducted on the ship oil flow pipeline. The inside of the pipeline can be cleaned more efficiently, and the serial washing efficiency is improved.

The invention relates to the technical field of cables, and provides a high-strength overhead insulated cable which is composed of three layers including a conductor, an insulating layer and a sheath layer from inside to outside in sequence, and the sheath layer is prepared from the following raw materials in parts by weight: 60-80 parts of ethylene-octylene copolymer, 6-10 parts of plasticizer, 15-20 parts of flame retardant, 0.5-1.5 parts of antioxidant, 0.2-0.8 part of lubricant and 12-15 parts of filler; the ethylene-octylene copolymer is composed of a first ethylene-octylene copolymer and a second ethylene-octylene copolymer, the crystallization temperature of the first ethylene-octylene copolymer is lower than that of the second ethylene-octylene copolymer, and the mass ratio of the first ethylene-octylene copolymer to the second ethylene-octylene copolymer is (1-5): (5-1). According to the technical scheme, the problem of low strength of the overhead insulated cable in the prior art is solved.

The invention provides a high-performance flame-retardant spandex fiber and a preparation method thereof, belongs to the technical field of chemical fiber manufacturing, and aims to solve the technical problem of poor flame retardance of flame-retardant polyurethane. The preparation method comprises the following steps: mixing polydihydric alcohol and diisocyanate, and carrying out prepolymerization reaction to obtain a prepolymer; dissolving a phosphorus-containing dihydroxyl compound, a nitrogen-containing dihydroxyl compound and a catalyst in a polar amine solution to prepare a mixed solution, mixing the mixed solution with the prepolymer, and performing polymerization reaction to obtain low-molecular-weight polyurethane containing phosphorus in a molecular chain; the preparation method comprises the following steps: mixing low-molecular-weight polyurethane with a chain extender, and carrying out chain extension reaction to obtain a phosphorus-containing polyurethane urea solution; and curing the phosphorus-containing polyurethane urea solution, and spinning to obtain the high-performance flame-retardant spandex. By utilizing the cross-linking characteristic of a nitrogen-containing element at a high temperature and the phosphorus-nitrogen synergistic flame-retardant advantage, the problems that a flame retardant in the conventional technology is poor in compatibility with spandex macromolecules and easy to fall off are solved, the acting force of a molecular chain is also improved, and the viscosity of a spandex spinning stock solution is improved, so that the spandex spinning stock solution can meet the requirement of high-speed dry spinning; the spandex is endowed with excellent flame retardant property, mechanical property and controllable elasticity, the preparation efficiency of the spandex is improved, and the cost is greatly reduced.

The invention provides a foldable dimming film which comprises a bendable base material layer, a first adhesion promoting layer, a conductive layer, a second adhesion promoting layer, a polymer dispersed liquid crystal layer, a second adhesion promoting layer, a conductive layer, a first adhesion promoting layer and a bendable base material layer which are sequentially stacked, and the conductive layer comprises graphene oxide and silver nanowires. The polymer dispersed liquid crystal layer comprises liquid crystals, linear polyurethane acrylate and functionalized polysilsesquioxane, the functionalized polysilsesquioxane accounts for 10%-20% of the total mass of the linear polyurethane acrylate and the functionalized polysilsesquioxane, and the bendable base material layer is made of a polymer with polar groups. The first adhesion promoting layer is made of linear polyurethane acrylate, the second adhesion promoting layer is composed of polyester polyol and cellulose, and the mass fraction of the cellulose is 15%-20%. The dimming film provided by the invention has relatively good foldability.

The invention discloses a protective film pressing device and a use method thereof, and belongs to the technical field of protective film processing, the protective film pressing device comprises a cabinet placed above the ground, an unwinding roller is rotatably mounted on the upper surface of the left end of the cabinet, and a winding roller is rotatably mounted on the upper surface of the right end of the cabinet; a fixing frame is fixedly installed on the upper surface of the machine cabinet, a movable plate is arranged above the fixing frame, an air conveying assembly is connected between the fixing frame and the movable plate, a rotating frame is elastically and rotationally connected to the lower portion of the movable plate through a torsional spring, and an obliquely-arranged exhaust roller is rotationally connected to the lower end of the rotating frame. And a heat generation assembly for heating air is arranged on the inner side of the exhaust roller. According to the protective film pressing device and the using method thereof, the exhausting and pressing effects on the protective film can be improved through vibration, gas can be automatically conveyed to heat the protective film in the pressing process, and the exhausting and cleaning effects of the protective film are further improved.

The invention relates to the technical field of medical instruments, and provides an intratracheal one-way valve device and a suction cleaning system using the same. Comprising a support assembly and a one-way valve assembly. The support assembly is provided with a supporting part and a protection part. The one-way valve assembly is provided with a main valve, the main valve is provided with a supporting slope in an extending mode, and an auxiliary valve is arranged on the supporting slope. Wherein the window of the auxiliary valve is arranged on the supporting slope surface, the covering film of the auxiliary valve is attached to the outer slope surface of the supporting slope surface, and the end, away from the main valve, of the covering film is connected with the supporting slope surface. The one-way valve device has the advantages that during normal breathing, the auxiliary valve is in a closed state, the main valve is closed to prevent external air from entering the target lung during inspiration and is opened to discharge gas or secretions in the target lung during expiration, and during cough, the auxiliary valve is opened to discharge secretions deposited in the one-way valve device in the trachea; meanwhile, rapid exhaust air flow is formed to impact secretions outside the duckbilled main valve, and cleaning of the secretions around the main valve is facilitated.

The composite copper foil comprises a supporting layer, a metal layer is arranged on the surface of the supporting layer, the supporting layer is provided with crystals, the crystal form of the crystals of the supporting layer is spherocrystal, the average particle size of the crystals of the supporting layer is larger than that of the metal layer, and the average particle size of the crystals of the supporting layer is larger than that of the metal layer. And copper metal or copper alloy is arranged in the metal layer. The metal layer can be in bonding contact with the spherocrystal of the supporting layer through a plurality of nanoscale particles, the acting force between particle molecules of the metal layer and molecules of the supporting layer is increased, the bonding strength can be improved, and therefore the bonding force between the metal layer and the supporting layer can be improved; meanwhile, the contact among metal layer particle molecules is increased, the overall sheet resistance of the metal layer is reduced, the flow conductivity of the metal layer is improved, the tensile strength of the metal layer is improved due to the fact that the contact among the metal layer molecules is large, and the composite copper foil is not prone to being stretched and damaged in the follow-up processing link.

The invention discloses a diaphragm with a self-layering coating, a preparation method of the diaphragm and a related secondary battery and an electric device. The battery diaphragm comprises a base membrane and a coating arranged on at least one surface of the base membrane, the coating is obtained by coating slurry once, the slurry comprises an amino-modified organosilicon polymer, an amino-modified inorganic filler and epoxy resin, the content of the amino-modified organosilicon polymer on the upper surface of the coating is recorded as V1, and the content of the amino-modified inorganic filler on the lower surface of the coating is recorded as V2. The content on the lower surface of the coating is recorded as V2 and V1gt; v2. According to the embodiment of the invention, the heat resistance and cohesiveness of the base membrane can be improved at the same time through one-time coating, and the heat shrinkage resistance of the diaphragm is improved through the amino-modified organosilicon polymer, the amino-modified inorganic filler and the epoxy resin.

The invention discloses a processing technology of a down-proof down jacket fabric, belongs to the technical field of down jacket fabric processing, and aims to solve the technical problem that the down-proof performance, the waterproof air permeability and the antistatic performance of the down jacket fabric in the prior art need to be further improved. The method comprises the following steps: by taking a fabric lining film as an inner layer and a base fabric as an outer layer, coating a modified cross-linking agent between the two layers, putting the two layers into a hot melting bonding machine, and carrying out hot bonding to obtain the down-proof down jacket fabric, the fabric lining film is prepared from the modified graphene compound, the modified polyurethane and the deionized water, so that the down-proof performance, the waterproof performance and the air permeability of the down jacket fabric are effectively improved, the antistatic performance and the mechanical performance of the down jacket fabric are improved, and the down jacket fabric better meets the requirement of the clothing manufacturing industry for the down-proof down jacket fabric.

The invention relates to the technical field of dust removal, and discloses an air purification device for a logistics warehouse, which comprises a box body and a filter screen, the box body is provided with an air outlet, and the air purification device also comprises an introduction mechanism for introducing air into the box body; the filter screen is fixedly connected in the box body; a partition plate is vertically arranged on the box body, a through hole is vertically formed in the partition plate, a sliding block is slidably connected into the through hole, a rotating shaft is rotatably connected to the sliding block, and a plurality of first bristles penetrating through the filter screen are arranged on the rotating shaft; a rack is arranged on the side wall of the partition plate, a gear is coaxially connected to the rotating shaft, and the gear is meshed with the rack; and the driving mechanism is used for driving the sliding block to do vertical reciprocating motion. According to the scheme, the problem that a filter screen in an existing dust removal device is easily blocked is mainly solved.

The invention provides a temperature compensation type surface acoustic wave resonator, a temperature compensation type surface acoustic wave filter and a manufacturing method of the temperature compensation type surface acoustic wave resonator. The resonator comprises a substrate, an interdigital transducer, a reflecting grating region, a first load structure, a second load structure and a temperature compensation layer, the interdigital transducer comprises a plurality of long-finger electrodes; the reflecting grating region comprises a plurality of reflecting gratings; the first load structure is arranged on the side, away from the substrate, of the long-finger electrode in the thickness direction, and the orthographic projection of the first load structure on the substrate and the orthographic projection of the long-finger electrode on the substrate are at least partially overlapped; the second load structure is arranged on the side, away from the substrate, of the reflecting grating in the thickness direction, and the orthographic projection of the second load structure on the substrate and the orthographic projection of the reflecting grating on the substrate are at least partially overlapped. By arranging the first load structure and the second load structure, the acting force of the long finger electrode and the reflecting grating on the substrate can be increased, the propagation speed of the surface acoustic wave can be changed, the transverse mode clutter can be inhibited, and the Q value of the temperature compensation type surface acoustic wave resonator can be improved.

The invention belongs to the technical field of breed duck feed production, and particularly relates to a breed duck feed production wet feed crusher which comprises a barrel body, a feeding hopper is arranged at the upper end of the barrel body, supporting legs are fixedly connected to the lower portion of the barrel body, a discharging opening is formed in the barrel body, and a crushing device and a screening device are arranged on the barrel body. And a feeding device is arranged on the side edge of the barrel body. According to the wet material crusher for breeding duck feed production, a crushing cutter is driven by a first motor to rotate, breeding duck feed is rapidly and evenly crushed, then the crushed feed falls into a conical filter screen to be screened, large-particle impurities are effectively removed, large particles obtained after screening are conveyed through an auger, the feed is fed into a feeding pipe, and the feeding pipe is used for feeding the breeding duck feed. And then the feed is conveyed into the barrel body through the feeding pipe, so that the crushing cutter performs secondary crushing on the large-particle feed, the secondary crushing mechanism ensures the uniformity and consistency of the feed particles, and the overall crushing quality is remarkably improved.

The present application relates to the field of filling glue, and in particular to a high-flowability epoxy resin encapsulated bottom filling glue and a preparation method thereof. The high-flowability epoxy resin encapsulated bottom filling glue, in parts by mass, has the following raw materials: 40 to 60 parts of epoxy resin composition, 10 to 15 parts of active diluent, 20 to 25 parts of curing agent, 1 to 2 parts of accelerator, 20 to 35 parts of modified filler, 1 to 4 parts of coupling agent, 1 to 1.5 parts of leveling agent, and 1 to 3 parts of flame retardant. The epoxy resin encapsulated bottom filling glue prepared in the present application not only has good stress impact resistance, mechanical properties and flow properties, but also can maintain excellent moisture resistance, water resistance, corrosion resistance, acid and alkali resistance and other properties, thereby greatly improving the application performance of the filling glue and having very excellent application prospects.

The utility model relates to the field of automobile seat retainer ring installation equipment, in particular to novel retainer ring assembly equipment which comprises an installation frame, an upper frame is arranged on the installation frame through an upper frame positioning tool, an installation driving mechanism used for installing a retainer ring on the upper frame is further arranged on the installation frame, and the installation driving mechanism comprises a supporting seat. The supporting base can slide on the mounting frame in the direction facing the upper frame, and a positioning detection mechanism used for being connected with the clamping ring in a clamping mode is arranged on the side, facing the upper frame, of the supporting base. According to the utility model, a conventional manual installation mode or a complex equipment installation mode is replaced, the automatic detection and installation process of the retainer ring is realized in a low-cost mode, the influence of product design on the assembly difficulty is reduced, and the stability of product assembly is ensured; the lever structure is used for increasing the acting force when the clamping ring is installed, and stable and reliable installation is guaranteed; and the mounting state of the clamping ring is accurately detected through the positioning detection mechanism, and the neglected mounting condition is avoided.

The invention discloses a battery fire extinguishing agent and a preparation method and application thereof. Preparation raw materials of the battery fire extinguishing agent comprise water, hydrated salts and auxiliary materials, the auxiliary materials comprise at least one of nano-particles or an organic binder, and the mass fraction of the hydrated salts in the preparation raw materials is 10%-80%. The battery fire extinguishing agent contains high-concentration hydrated salts, can effectively inhibit the occurrence of membrane boiling, and can interact with the nanoparticles and the organic binder to remarkably improve the fire extinguishing capacity and the cooling effect of the fire extinguishing agent.

The utility model relates to the technical field of operation machinery, and discloses a track shoe assembly, a track and a track type operation machinery track shoe assembly. The crawler belt assembly comprises a crawler belt plate body, and at least one groove extending in the first direction is formed in the first plate face of the crawler belt plate body; the protection cushion block comprises a cushion block body and at least one protrusion arranged on the first surface of the cushion block body, the protrusions extend in the first direction, and the protrusions correspond to the grooves in a one-to-one mode and are in interference fit with the grooves. According to the track shoe, the protective cushion blocks are arranged in the grooves of the track shoe body, so that the contact area between a track and a road can be increased, the pressure applied to the road is reduced, and the damage to the road can be reduced.

The lifting device for marking pen pigment production comprises a loading plate, a storage tank and a conveying pipe, the storage tank is installed at the top of the loading plate, the top of the storage tank is fixedly connected with a feeding hopper, a pump machine is installed at the top of the loading plate, the side edge of the pump machine is fixedly connected with a first hose, and the side edge of the storage tank is provided with a first connector; the side edge of the pump machine is fixedly connected with a second hose, the side edge of the conveying pipe is provided with a second connector, the second hose is connected with the second connector, the top of the loading plate is provided with a supporting pipe, the top of the supporting pipe is provided with a stand column, the top of the stand column is fixedly connected with a fixing base, and a through hole is formed in the fixing base. And the top of the fixing base is provided with a first threaded hole, the top of the fixing base is provided with a first hand-screwing bolt, and the bottom of the loading plate is provided with moving wheels. Liquid pigment is effectively conveyed, operation is easy, use is convenient, manpower is saved, and the production efficiency is improved.

The invention relates to the field of pipe jacking construction, in particular to a pipe jacking construction transportation rail blocking device which comprises a transportation rail and a transportation vehicle, wheels are symmetrically installed at the bottom of the transportation vehicle, each wheel is slidably connected to the transportation rail, brake discs are symmetrically and fixedly installed at the bottom of the transportation vehicle, and the brake discs are slidably connected to the transportation rail. Each brake disc is located on the two sides of the corresponding adjacent wheel, and a cooling assembly is fixedly installed on the side wall of each barrier plate. By arranging the buffering assemblies, after a vehicle body of the transport vehicle makes contact with two first baffles, first springs can be compressed to get close to a barrier plate, then wheels enter the position between the two buffering plates, and in the process of getting close to the barrier plate, friction force is continuously enhanced through gradually-dense second friction blocks, so that the transport vehicle is braked; and then the wheels of the transport vehicle are in contact friction braking with the second friction block and the first friction block again, so that the transport vehicle is braked slowly in the braking process.

The internal rotation extrusion abrasive flow polishing device is used for polishing a screw and comprises a polishing machine shell, a motor and a transmission belt, and the screw penetrates in from one end of the polishing machine shell and penetrates out from the other end of the polishing machine shell; a runner device for polishing the screw rod, a driving sleeve and a sealing structure are arranged in the polishing machine shell; the motor is assembled outside the polishing machine shell and connected with the driving sleeve through a transmission belt. The driving sleeve is assembled on the outer wall of the runner device and used for driving the runner device to rotate; the sealing structure is assembled at the joint of the polishing machine shell and the driving sleeve; the transmission belt is driven by the motor, then the driving sleeve and the runner device are driven to rotate, the movement speed of abrasive particle flow is increased, and the polishing efficiency is improved; the runner device can polish one section of the screw rod, so that the polishing device can adapt to the screw rods with different lengths, and the application range and the practicability of the polishing device are improved; and the runner device can be used for uniformly and finely polishing the screw rod, so that the consistency and the stability of the polishing quality are ensured.

The utility model discloses energy-saving and effective reinforcement equipment, which belongs to the field of reinforcement equipment, and is characterized in that an input mechanism and an output mechanism which are connected through a lever mechanism are arranged, the input equipment firstly decelerates through a transmission ratio and reinforces to drive a transmission wheel to rotate, and simultaneously drives a coaxial flywheel to rotate and store force; then the lever mechanism is used for boosting to drive the output mechanism to operate, when the output mechanism operates, the flywheel is stressed firstly to drive the coaxial transmission wheel to rotate, boosting output can be carried out again after transmission ratio conversion of the transmission wheel, and when the equipment encounters instantaneous force increase, the flywheel can assist in crossing the increased instantaneous force; due to multiple reinforcement of the flywheel, the lever and the transmission ratio, input equipment can stably drive equipment exceeding a rated load to operate with smaller power, energy consumption of operation is saved, speed increasing and force reducing can be conducted at the output end through the gear ratio, and the equipment keeps a certain transmission ratio or resultant force and reinforcement are conducted only through the flywheel and the lever.

The invention discloses a preparation process of environment-friendly degradable thermo-sensitive paper for food, and relates to the technical field of thermo-sensitive paper. Wood pulp and polylactic acid fibers are pulped, lignin is used for backfilling, so that interaction among the fibers is enhanced, pores of prepared paper are reduced along with improvement of the pulping degree, a matrix indirectly achieves the oil-proof effect, then the interior of the matrix is in a porous form through vacuum freeze drying treatment, and under assistance of ultrasonic waves, the oil-proof effect of the matrix is improved. A starch composite zein protein solution is introduced to realize an easy degradation effect, and alkaline protease is utilized to hydrolyze zein protein and react with glucose, so that a dried protein structure becomes compact, a flexible film layer structure is formed on the surface of a matrix, and the transmittance of water molecules and grease molecules is reduced; the easily degradable and oil-proof effects are further improved.

The pneumatic clamp comprises a cylinder body, a first side face and a second side face, the first side face and the second side face are opposite to each other, the first side face is provided with a first air inlet and a second air inlet, and a piston body comprises a first piston parallel to the first side face, a second piston parallel to the second side face and a connecting body connecting the first piston and the second piston. When air enters the first air inlet, the first piston and the sliding blocks get close to each other, when air enters the second air inlet, the second piston and the sliding blocks get away from each other, in the process that the sliding blocks get close to or get away from each other, the positioning pins move in the guide grooves, at least one guide groove is obliquely arranged, and the value range of the inclination angle of the guide grooves is (0, pi / 2). According to the utility model, the original mode of driving the piston up and down is changed, and the piston is driven by the left side surface and the right side surface, so that the design space of the piston is increased in a disguised manner, the size of the piston is correspondingly enlarged, the acting area of the piston is greatly increased, and the acting force on the piston is further increased.

The invention is suitable for the technical field of geological drilling equipment, and provides a coal field geological drilling coring device which comprises a rack, a mounting plate, a coring cylinder, a first stepping motor, a lifting mechanism and a stabilizing mechanism, and the stabilizing mechanism comprises a stabilizing plate, an elastic telescopic rod, a guide sleeve and a shear fork mechanism; the coal field geological drilling coring device further comprises an auxiliary assembly, the auxiliary assembly comprises an arc-shaped plate, a connecting ring, a connecting rod and a switching mechanism, and the switching mechanism comprises a side plate, a winding wheel, a winding rope and a volute spiral spring. According to the coal field geology drilling coring device, the rack, the mounting plate, the coring barrel, the first stepping motor, the lifting mechanism and the stabilizing mechanism are arranged, when the coring barrel gradually goes deep, an elastic telescopic rod enables the acting force of a stabilizing plate on the coring barrel to be gradually increased, and the stability of the coring barrel in the drilling process is improved; and the situation that the coring quality is affected due to the fact that the coring barrel gradually goes deep and vibration is intensified is avoided.

The invention relates to the technical field of grinding devices, and particularly discloses weld joint grinding equipment which comprises a workbench, a rotating disc, a fixing mechanism, a driving mechanism and a belt type grinding mechanism. The fixing mechanism comprises two fixing plates which are symmetrically arranged and assembled on the rotating disc in a front-back moving mode, calibrators which are located between the belt type grinding mechanisms and the center of the rotating disc and rotationally installed on the rotating disc, and positioning pins which are installed on the calibrators and can stretch out and draw back relative to the calibrators. The two hydraulic tanks are located between the fixing plates and the center of the rotating disc and fixed to the rotating disc, and the first pistons are installed in the hydraulic tanks and elastically connected with the fixing plates; the hydraulic tanks are communicated with the calibrator, and the tips of the positioning needles are used for pushing the inner wall of the box body; the belt type polishing mechanisms are movably assembled on the workbench and comprise alignment clamps used for clamping the calibrators so that the belt type polishing mechanisms can move to be right opposite to the calibrators. According to the welding seam polishing equipment, the position of the belt type polishing mechanism can be automatically adjusted.

The utility model discloses a roof photovoltaic power station sealing rainproof structure convenient to install, which comprises at least two photovoltaic assemblies and an installation beam, the at least two photovoltaic assemblies are installed on the installation beam side by side, and each photovoltaic assembly is provided with a frame. The sealing rainproof structure comprises a waterproof sliding block and an inner sliding way which is correspondingly and integrally arranged on the A faces of the frames of the two adjacent photovoltaic modules, the waterproof sliding block and the inner sliding way are in sliding fit for installation, and the waterproof sliding block shields a gap between the two adjacent photovoltaic modules after being installed in place. During field installation, after the photovoltaic modules are installed in place, the waterproof sliding blocks are pushed to slide along the inner slideways, and after the waterproof sliding blocks are installed in place in a sliding mode, the gaps between every two adjacent photovoltaic modules are shielded, so that the waterproof sliding blocks and the inner slideways jointly act to form a sealed rainproof structure, and waterproofness of the gaps between the two photovoltaic modules is achieved; and the waterproof effect is not weakened along with the completion time.

The invention discloses a pine needle organic compost preparation and application method, and belongs to the technical field of organic fertilizers, and the pine needle organic compost preparation and application method comprises the following steps: mixing potassium sulfate, plant ash, modified attapulgite, borax, pine needles and rape seed cakes, uniformly stirring, grinding, and carrying out puffing treatment to obtain a puffed material; uniformly mixing the puffed material, potassium citrate and a composite strain, fermenting, and drying to obtain a fermented material; mixing the leavening, the seaweed extract, the modified cellulose and the lignin aqueous dispersion to obtain a compound microcapsule; mixing the compound microcapsules, the reinforcing filler and the organic fertilizer to obtain a mixture, and dehydrating, granulating, screening and packaging the mixture to obtain the organic compost. The compound microcapsules avoid the loss of beneficial components of the leavening and the organic fertilizer in the processes of dehydration, granulation, screening and packaging, and the compound microcapsules provide a living space for composite strains in the leavening; the reinforcing filler has a porous structure, so that the adsorption of the fertilizer is improved.

The invention discloses a biodegradable composite polylactic acid packaging bag and a preparation method thereof, belongs to the technical field of biodegradable materials, and aims to solve the technical problem that the mechanical property, heat resistance and biodegradation rate of a polylactic acid material in the prior art need to be further improved. The material comprises the following components in parts by weight: 90-100 parts of modified polylactic acid, 10-15 parts of modified starch, 15-20 parts of modified nanofiber, 4-8 parts of pigment and 5-7 parts of additive, and is prepared by taking the modified polylactic acid as a basic raw material, the modified starch and the modified nanofiber as reinforcing materials and the pigment and the additive as auxiliary additives. The mechanical strength and high temperature resistance of the packaging bag are effectively improved, and the biodegradability of the packaging bag is improved, so that the packaging bag better meets the requirements of express and logistics industries on biodegradable packaging materials.