77results about How to "Good sealing" patented technology

The present application belongs to the field of coal mine, and relates to a coal mine underground orifice blowout prevention dust isolation device, which comprises, in sequence, a stamping dust isolation assembly, a gasket eccentric isolation assembly, a columnar brush array isolation assembly and a slag collecting main body, the slag collecting main body is connected with an orifice sealing pipe in a hole, and a drill rod is arranged through the stamping dust isolation assembly, the gasket eccentric isolation assembly, the columnar brush array isolation assembly and the slag collecting main body. The present application realizes the blocking of dust in the hole through the brush dust blocking of the columnar brush array isolation assembly, the eccentric dust isolation of the eccentric isolation assembly and the stamping dust isolation of the stamping dust isolation assembly, realizes the linkage control of the mechanism on the sealing assembly, and the greater the gas pressure sprayed out of the hole, the better the sealing effect of the sealing assembly, so that the safety hidden danger problem of gas spray hole in the drilling process can be effectively solved.

The invention discloses a nonmetal composite hydrogen conveying hose with a multi-form hydrogen blocking layer, and belongs to the technical field of hydrogen conveying hoses, the nonmetal composite hydrogen conveying hose comprises an external pipe, the bottom end of the external pipe is connected with a butt-joint pipe, the bottom end of the butt-joint pipe is connected with a composite hose, the bottom end of the butt-joint pipe is connected with a first sleeve in a penetrating mode, and the top end of the butt-joint pipe is connected with a second sleeve in a penetrating mode; the first sleeve is sleeved on the outer wall of the composite hose, the second sleeve is sleeved on the outer wall of the external pipe, a cavity is arranged in the butt-joint pipe, and a sealing measuring assembly is slidably connected in the cavity of the butt-joint pipe. A complete hydrogen conveying structure is integrally formed by a composite hose, a butt joint pipe and an external pipe, the butt joint pipe is fixedly connected with the composite hose and the external pipe in a sleeving mode through a first sleeve and a second sleeve, an inner cavity provides an installation and sliding space for a test sealing assembly, and the composite hose is of a multi-layer composite structure of a hydrogen conveying pipe, a first hydrogen blocking layer and a second hydrogen blocking layer. And a multi-form hydrogen blocking system with double hydrogen blocking layers and a hydrogen transporting base layer is formed.

The utility model discloses an alkaline battery sealing device relates to battery production processing technical field, including sealing device ontology, and the workstation is provided with the fixed lower mould, and the fixed lower mould is installed with the elastic cover, and the workstation is installed with the supporting block, and the output of guide telescopic link is installed with the fixed plate, and the fixed plate is installed with the push rod, and the push rod is rotatably installed with the connecting rod, and the other end of connecting rod is rotatably installed with the rotating rod, and the rotating rod is installed with the gear ring, and the gear ring is installed with the gear and engages, and the workstation is rotatably installed with the pivot, and the gear is fixed and is connected on the pivot, and the L type piece is installed with the torsion spring, and the other end of torsion spring is installed on the ratchet pawl, and the pivot top is installed with the knob, and the knob is installed with a plurality of circumferential array's rotation block, the utility model discloses, can be sealed alkaline battery clamped fixed and adapt to different size's alkaline battery, and the ratchet pawl will be clamped in the gear gap of ratchet wheel, can hinder the clockwise rotation of ratchet wheel, and the sealing of alkaline battery is relatively stable.

The utility model relates to a welding protection device for gas shield welding of a metal pipeline, which belongs to the field of welding auxiliary devices and comprises a first sealing element and a second sealing element which are used for sealing two ends in the metal pipeline on two sides of a welding seam and are connected through a gas inlet pipe and a connecting piece. The air inlet pipe penetrates through the first sealing piece, one end of the connecting piece is rotationally connected with the air inlet pipe, and the other end is fixedly connected with the second sealing piece. According to the welding protection device for gas shield welding of the metal pipeline, through cooperation of the first sealing piece, the second sealing piece, the gas inlet pipe, the connecting piece and the like, the effect that gas protection conditions are provided for a weld joint area in a targeted mode is achieved, the whole device can move in a straight pipe and at the position of an elbow, and the welding protection device is convenient to use. And gas protection conditions can be conveniently and sequentially provided for welding seams in different positions.

The utility model discloses glycerine enema filling equipment, and belongs to the technical field of glycerine enema production. The device mainly comprises a support, the upper side of the support is rotationally provided with a rotating disc, the edge of the rotating disc is evenly and rotationally provided with a plurality of rotating sleeves with the upper ends open, lifting blocks are slidably arranged in the rotating sleeves, the upper ends of the lifting blocks are provided with containing grooves, the two sides of the lifting blocks are provided with rotating plates, and the lower ends of the rotating plates are rotationally connected with the side walls of the lifting blocks. V-shaped plates are fixed to the opposite sides of the upper ends of the two lifting blocks, supporting plates corresponding to the rotating plates in position are fixed to the upper ends of the rotating sleeves, and the upper ends of the supporting plates make contact with the rotating plates. A lifting rod is slidably arranged at the bottom of the rotating sleeve, the upper end of the lifting rod is fixed to the bottom of a lifting block, a lifting block is fixed to the lower end of the lifting rod, and an elastic piece is arranged between the upper side of the lifting block and the rotating sleeve. The glycerine enema filling equipment achieves the effect of limiting the bottle opening of the glycerine enema bottle.

The utility model relates to a movable superhigh partition system, including a horizontal hoist in the lower end of building ceiling's hanger rail piece and a plurality of rolling assembly in the trolley piece of hanger rail piece, the lower extreme of trolley piece has a first connecting portion extending to the outside of hanger rail piece, and the first connecting portion is installed with superhigh partition piece, the opposite sides of adjacent two superhigh partition pieces are equipped with the splicing structure of mutual occlusion, the superhigh partition piece is built -in the linkage support piece that can support synchronously to the lower end, to fix in the preset position with superhigh partition piece is sequentially assembled and constitutes the partition system after. The utility model whole partition's sealing performance and stable performance are good after installation, and can effectively improve the fireproof sound insulation performance of space.

The utility model relates to the technical field of freshness protection bags, in particular to a sealed freshness protection bag which comprises a bag body, a bag opening is formed in one side of the bag body, a double-faced adhesive tape structure is fixed to the inner side of the bag opening, a one-way air opening structure is arranged on one side of the bag body and comprises an air outlet, and an air outlet channel is fixed to the position, located at the air outlet, of the outer side of the bag body. And a plurality of membrane flap structures are fixed on the inner side of the air outlet channel. The utility model solves the problems that when excessive articles are contained in an existing fresh-keeping bag, the distance from a bag opening to a tying buckle is usually short, sealing is inconvenient, gas in the sealing bag is inconvenient to extrude after the bag opening is sealed, and the fresh keeping of the articles in the bag body is influenced.

The utility model relates to an assembly type closed aluminum square tube and aluminum plate ceiling structure, and relates to the technical field of ceiling structures, the assembly type closed aluminum square tube and aluminum plate ceiling structure comprises a suspender, a base layer ceiling keel, a clamping type bearing keel, an assembly type sealing plate and an aluminum square tube, the clamping type bearing keel comprises a keel main body and a plurality of bearing parts fixed below the keel main body, the keel body is fixedly connected with a base layer ceiling keel, bearing grooves are formed in the two side walls of the bearing part, the top end of the aluminum square tube is bent inwards to form folded edges, the aluminum square tube is hung at the bearing grooves through the folded edges, and the two sides of the assembly type sealing plate are placed on the folded edges. The assembly type sealing plate comprises a C-shaped bottom plate and a chip, the outer side wall of the C-shaped bottom plate abuts against the outer side wall of the aluminum square tube, and the assembly type sealing plate is placed on the folded edge through the chip. The construction structure of a traditional gypsum board base layer is avoided, mounting, dismounting and overhauling are easy and convenient, time, labor and materials are saved, the construction cost is reduced, and good economic benefits are achieved; after installation, the structure is stable, and the sealing performance is good.

The invention belongs to the technical field of biotechnology and protein determination, and particularly relates to confining liquid as well as a preparation method and application thereof. Modified bovine serum albumin and recombinant casein polypeptide are used as core components of the confining liquid, hydroxypropyl-beta-cyclodextrin, polyglycerol fatty acid ester and other auxiliary components are added, and the confining liquid is prepared through a specific technology. The modified bovine serum albumin and the recombinant casein polypeptide have a synergistic effect, so that active sites of the detection carrier can be efficiently sealed; the stabilizing agent and other components are supplemented, so that the stability and compatibility of the confining liquid are improved. The confining liquid is simple and convenient in preparation process, controllable in cost, suitable for various detection carriers such as elisa plates and nitrocellulose membranes, capable of reducing non-specific binding and improving detection sensitivity, and suitable for various biological detection scenes such as enzyme-linked immunosorbent assay.

This application relates to a traction-type continuous core membrane water-stopping system, comprising an undisturbed soil mixing body (2), a closed or long continuous core membrane (1) erected in the undisturbed soil mixing body (2) after implementation, and auxiliary components (3) for sealing nodes. The implementation components for forming this water-stopping system include the core membrane (1), a casing (4) containing the core membrane (1) and a forwarding device (5), the forwarding device (5), an implantation device (6), a traction rope (8), and a traction device (7). The forwarding device (5) connects the traction rope (8) and the core membrane (1) and pulls the built-in core membrane (1) forward and unfolds within the undisturbed soil mixing body (2). The traction device (7) pulls the forwarding device (5) and the core membrane (1) unfold within the undisturbed soil mixing body (2). This system can be effectively implemented and forms a continuous and reliable water-stopping structure. It has a fast construction speed, good water-stopping effect, and low cost, and is especially suitable for foundation pit and slope water-stopping.

The utility model relates to a novel sealing and cutting machine which comprises a machine frame, the machine frame comprises a working table, a machine frame top plate axially arranged at the top end of the machine frame and a machine frame bottom plate arranged at the bottom of the working table, a movable sealing and cutting device is arranged between the machine frame top plate and the working table, and the movable sealing and cutting device comprises an upper sealing and cutting device and a lower sealing and cutting device. The upper sealing and cutting device is arranged between a top plate of the rack and the workbench, the workbench is provided with a containing groove for containing the lower sealing and cutting device, and the top plate of the rack is provided with a lifting assembly capable of driving the upper sealing and cutting device. The lower sealing and cutting device and the upper sealing and cutting device are connected through a chain linkage structure so that the upper sealing and cutting device can drive the lower sealing and cutting device to ascend and descend in the opposite direction when ascending and descending, in the sealing and cutting process, the upper sealing and cutting device and the lower sealing and cutting device can apply pressure and conduct cutting in the upper direction and the lower direction at the same time, sealing is firmer, and cutting is more orderly.

The utility model relates to the technical field of packaging bag sealing machines, in particular to a packaging bag sealing machine for deoxidizing agent production, which comprises a base. Movable grooves are formed in the four corners of the top face of the base, and an empty groove is formed in the middle of the top face of the base. A shaking structure is installed on the base and comprises a backing ring, the backing ring is fixedly installed on the top face of the base, a containing table is movably installed on the top face of the base, guide columns are fixedly connected to the four corners of the bottom face of the containing table, springs are arranged on the outer sides of the guide columns in a sleeving mode, and a motor is fixedly installed in the base. The output end of the motor is fixedly connected with a cam, an adjusting structure is installed on the back face of the base, and the adjusting structure comprises a fixing frame. According to the sealing machine disclosed by the utility model, materials can be driven to shake in a packaging bag through the arrangement of the lifting movable placing table, so that the materials are compacted, a space is vacated in the packaging bag, the packaging bag can be conveniently placed in the sealing machine main body, and the packaging bag can be conveniently sealed.

The utility model relates to the technical field of oil and gas pipelines, in particular to a rapid emergency plugging device for oil and gas pipeline leakage, which is characterized in that the upper end of a bottom frame is slidably connected with a movable frame, two sides of the upper end of the movable frame are slidably connected with movable plates, and the movable frame is connected with a distance adjusting piece for adjusting the distance between the two movable plates; the upper end of each movable plate is detachably connected with a connecting plate, one end of each connecting plate is connected with an open cover, and an opening of each open cover is connected with a sealing ring. After the distance adjusting part is started, the two movable plates move oppositely by a set distance, each movable plate drives the corresponding open cover to move by a set distance through the corresponding connecting plate, the two open covers make contact after moving oppositely by the set distance, and gaps between the open covers and a pipeline are sealed through the sealing rings; after the two open covers are in contact fit, the joint of the pipeline is covered and blocked, bolts do not need to be tightened, the blocking speed is high, and the blocking effect is good.

The application discloses an amphibious operation vehicle plate mud breaking device, and belongs to amphibious cleaning operation mechanical equipment. The device is composed of a connecting support, a driving unit and a rotary cutting roller, wherein the connecting support is used for connecting an amphibious operation vehicle body or a working arm; the driving unit comprises a mounting base, left and right side plates, a driving motor, a chain transmission mechanism and the like; a motor mounting plate is changed in position through an adjusting screw to tension the chain; a sealing plate is quickly wrapped around a spacer to form a sealed transmission space through buckles and hasp lock rings; the rotary cutting roller is a left-right symmetrical regular polygon hollow structure, equal-distance cutting blades with staggered bending directions at the ends are mounted on the rotary cutting roller, sealing rubber sheets are arranged at both ends of the rotary cutting roller, and an inner center pipe is hermetically welded with a side sealing plate to form a sealed cavity. The application can forcibly pre-cut and break the riverbed plate mud, so that the spiral mud pump can be smoothly sucked and transported, and has the characteristics of lightweight structure, convenient maintenance, no cutting blind area and small rotary resistance.

The utility model relates to the technical field of carton processing equipment, in particular to a carton edge folding device. According to the carton edge folding device provided by the embodiment of the invention, the cover plate at the top of the carton is subjected to edge folding treatment through the lower pressing plate arranged at the bottom of the folding arm plate, the lower pressing plate can achieve first-stage centering edge folding treatment on the cover plate through the second step face, and therefore the cover plates on the two sides are in the centering edge folding state. And moreover, the lower pressing plate can also realize overpressure lagging treatment of the second stage of the cover plate through the first step surface, so that the cover plates on the two sides can be bent downwards to generate an overbreak angle, and the cover plates on the two sides are in an overpressure lagging treatment state. By the adoption of the structural design, the problem of rapid rebounding of the cover plate can be solved through the two-section edge folding technology, and therefore subsequent sealing operation on the cover plate of a carton is facilitated.

The utility model discloses a heat-insulating energy-saving side-hung door and window capable of renovating and upgrading an old door and window, and relates to the field of old door and window renovating, the heat-insulating energy-saving side-hung door and window comprises an old door and window frame installed on a building, and a first heat-insulating frame and a second heat-insulating frame are correspondingly arranged on the two sides of the old door and window frame; the old door and window frame, the first heat insulation frame and the second heat insulation frame are each provided with a renovating mechanism, and each renovating mechanism comprises corresponding mounting holes formed in the peripheries of the old door and window frame, the first heat insulation frame and the second heat insulation frame. New glass is installed on the corresponding first heat insulation frame and the second heat insulation frame, then the first heat insulation frame and the second heat insulation frame are installed on the old frame through the first sealing gasket and the second sealing gasket, and the installation columns are installed, so that nuts can be rotated, and the heat insulation frames are installed on the old frame. Therefore, the first heat insulation frame and the second heat insulation frame can be mounted on the old frame, and renovating and upgrading operation can be performed on the old door and window, so that the convenience and the flexibility during renovating can be improved.

According to the automatic dust removal plug cover, an air blowing device is arranged in an automatic control mechanism, the air blowing device can remove dust on the inner wall of a discharging port, the automatic control mechanism can control the plug cover of a powder stirring tank to be automatically opened or closed, and the automatic dust removal plug cover is automatically opened or closed through combination of the automatic control mechanism and the air blowing device. According to the powder stirring tank, the plug cover of the powder stirring tank can be automatically controlled to be opened or closed without opening a hand sliding door, the blowing device arranged on the automatic control mechanism can automatically block the plug cover after dust removal and cleaning are conducted on powder attached to the inner wall of the discharging port, the use process is more convenient, the blocking effect is better, the effect is better, the hand sliding door does not need to be opened, and operation is convenient. And the powder adhered to the inner wall of the discharge port does not need to be manually cleaned, and dust pollution caused by the fact that the powder is splashed out of a workshop can be avoided.

This invention provides a powder tanker unloading system, including a temporary storage tank. The upper part of the temporary storage tank is connected to a feed hose, and the upper end of the temporary storage tank is connected to a filter shell. The filter shell has an exhaust port connected outwards, and a dust filter element is installed inside the filter shell. The lower end of the temporary storage tank is connected downwards to a discharge pipe. A unloading section is located at the lower end of the powder tanker. A discharge pipe, detachably connected to the free end of the feed hose, is located at the bottom of the unloading section. An air injection pipe is arranged around the unloading section. The discharge pipe has a strip-shaped feed inlet extending along its length within the unloading section. Multiple high-pressure air blowing pipes, extending into the unloading section and facing the strip-shaped feed inlet, are arranged inwards from the air injection pipe. The free end of each high-pressure air blowing pipe is open and inclined towards the sealing plug. This invention utilizes high-speed airflow to propel the powder quickly unloading, eliminating the need to maintain a high-pressure environment inside the tank, resulting in lower unloading energy consumption and greater safety.

The utility model discloses a piece type wind power tower tube storage bracket, which belongs to the technical field of wind power and comprises a plurality of support components, protective components are arranged on the support components, every two adjacent protective components are mutually clamped through a connecting component, and end cover plates are detachably connected onto the head protective component and the tail protective component. Through the supporting assembly, the protection assembly and the connecting assembly, stable supporting and end face full-coverage protection of the tower drum in a temporary or long-term storage state are achieved, the surface of the tower drum is prevented from being affected by external environments such as dust and rainwater, the storage quality of the wind power tower drum is improved, the service life of the wind power tower drum is prolonged, split type modular design is adopted, assembling is convenient, the structure is reliable, and cost is low. And the device is suitable for application scenes such as manufacturing and transportation of the wind power tower drum.

The invention relates to the technical field of product sorting, and discloses a multi-posture barrel-shaped product sorting mechanism which comprises a first conveying rack, a first conveying belt, a second conveying rack, a second conveying belt, an L-shaped support and a multi-posture detection assembly. A first conveying belt is rotationally installed on the first conveying rack and used for conveying transparent food packaging barrels. The second conveying rack is fixedly connected to the front side of the first conveying rack, the first conveying rack communicates with the second conveying rack, and a second conveying belt is rotationally installed on the second conveying rack and used for conveying transparent food packaging barrels in a non-vertical state. The L-shaped support is fixedly connected to the rear side of the top of the first conveying rack. The multi-posture detection assembly is arranged on the L-shaped support and used for detecting the posture of the transparent food packaging barrel. The device has the following advantages and effects that high-precision multi-posture detection on the transparent food packaging barrels can be achieved, and precise sorting on the transparent food packaging barrels can be achieved.

The application provides application of a polyoxyethylene-polyoxypropylene-polyoxyethylene tri-block copolymer in a foam extinguishing agent. The application also provides a foam extinguishing agent, which is a heat-responsive gel foam extinguishing agent based on the polyoxyethylene-polyoxypropylene-polyoxyethylene tri-block copolymer, and has heat response capability and excellent extinguishing performance. The heat-responsive gel foam extinguishing agent provided by the application exhibits good fluidity and foaming performance at normal temperature, and once the temperature reaches the critical gel temperature of the foam solution, the flowing foam rapidly changes into a gel foam in situ, and the stability of the foam is significantly improved. The foam extinguishing agent can be widely used in A and B class fires and other fires. In particular, the foam extinguishing agent forms a high-stable gel foam when extinguishing a fire, and has excellent anti-reignition performance.

This invention discloses a green cementing material based on industrial solid waste activation and its preparation method. The green cementing material comprises the following components by weight percentage: 88-96% oil well clinker, 2-6% natural gypsum, and 2-8% granulated blast furnace slag powder, wherein the granulated blast furnace slag powder has a specific surface area of ​​400-500 m² / kg and a median particle size D50 of 5-10 μm. The preparation method includes: feeding the oil well clinker, natural gypsum, and granulated blast furnace slag powder into a grinding equipment in a certain proportion for joint grinding, so that the specific surface area of ​​the resulting mixed powder reaches 340-380 m² / kg, and then homogenizing it to obtain the green cementing material. This invention utilizes a low-dosage granulated blast furnace slag powder to replace part of the oil well clinker, and achieves mechanical activation of the slag through joint grinding. While ensuring the early strength of the cementing material, it improves the material's density and sealing performance, reduces permeability, and realizes the resource utilization of industrial solid waste. It has the advantages of simple process, easy industrial implementation, and green and low-carbon characteristics.

The utility model discloses a kind of automatic liquid fertilizer packaging devices, which belongs to liquid fertilizer production technical field.It mainly includes base, base includes side frame one, side frame one side is sequentially fixedly connected with middle rack, side frame two, middle rack one side is fixedly connected with side frame three, side frame three one side is equipped with bunker, middle rack is equipped with circular groove, shaft is rotatably connected in circular groove middle, gear one is fixedly connected on the upper portion of shaft, away from the rectangular groove edge of side frame three one side fixedly connected with rotating shaft hole, third driving device is rotatably connected on rotating shaft hole, third driving device extending end is fixedly connected with gear two, two half-barrel devices are rotatably connected in circular groove inside.The utility model can continuously fill liquid by the cooperation of storage rack and suction cup device one and suction cup device two, and after filling, it can be transferred by rotating half-barrel device and sealed by sealing machine.

The utility model discloses an excavator hydraulic pump pump cover of improved interaction force structure, including pump cover body, the pump cover body is connected through bolt between pump body, the periphery of pump cover body all movably installs the flap, is located the square groove of flap department on the pump cover body, the guide plate of being located square groove inside is fixedly installed on the flap. According to one embodiment of the present disclosure, by setting the flap, the guide plate, the clamping block and the limiting assembly, when the pump cover body is connected on the pump body through the bolt, the staff can make the flaps around the pump cover body gather each other through the limiting assembly, so that the flap moves to the middle part of the pump cover body, and then the clamping block can be inserted into the reserved slot hole on the surface of the pump body, so that when the pump cover body bears the pressure inside the pump body, the clamping block and the flap can share part of the pressure, reduce the interaction force that the bolt and the pump body thread hole receive, thereby avoiding the bolt excessive fatigue service life reduction.

The invention provides a modified silicon dioxide fiber, an oil-based drilling fluid and a preparation method of the modified silicon dioxide fiber and the oil-based drilling fluid. The preparation method of the modified silicon dioxide fiber comprises the following steps: carrying out surface modification on silicon dioxide fiber by using a silane coupling agent to obtain a first modified product; and carrying out surface modification on the obtained first modified product by using lauroyl glutamic acid and tert-butyl peroxypivalate to obtain the modified silicon dioxide fiber. The oil-based drilling fluid comprises an oil phase, bentonite, a flow pattern regulator, a filtrate loss agent, modified silicon dioxide fibers, a weighting agent and a lubricant, 100 parts by weight of the oil phase is taken as a reference, the bentonite accounts for 3-8 parts by weight, the flow pattern regulator accounts for 7-10 parts by weight, the filtrate reducer accounts for 3-5 parts by weight, the modified silicon dioxide fiber accounts for 18-22 parts by weight, the lubricant accounts for 8-12 parts by weight, and the weighting agent accounts for 20-26 parts by weight. The oil-based drilling fluid provided by the invention has good solid-phase dispersion performance and plugging performance.

The present application relates to the technical field of electronic circuit preparation, in particular to a nano-modified PAI-based temperature-resistant high-entropy ceramic coating, a preparation method, a coating layer, a preparation method, a ceramic substrate electronic circuit and a preparation method.The present application uses high-entropy ceramic catalyst systems (CoCrFeMnZn)3O4 and (CoCrFeNiZn)3O4 with spinel structure as catalysts, and uses PAI as a binder for high-temperature-resistant ceramic coating, which can be obtained by spraying in a controllable thickness and can be processed on flat surfaces and curved surfaces.In addition, the ceramic characteristics after solidification and the effect of the binder have a good sealing effect on the surface pores of the sintered LTCC ceramic, thereby improving the air tightness and corrosion resistance of the ceramic device.

This invention discloses a composite coating for concrete structures, comprising a sealing primer, an intermediate coat, and a topcoat. The sealing primer is a polyurea coating with modified concrete added, the amount of modified concrete being 3%–6% of the coating weight, and the thickness of the sealing primer being 20–100 μm. The intermediate coat is a polyurethane coating with steel powder added, the amount of steel powder being 3%–6% of the coating weight, and the thickness of the intermediate coat being 80–200 μm. The topcoat is an epoxy resin coating with molybdenum disulfide powder added, the amount of molybdenum disulfide powder being 1%–4% of the coating weight, and the thickness of the topcoat being 50–100 μm. The sealing primer of this composite coating fills concrete pores and cracks, improving structural density and providing a good foundation for subsequent coatings. The intermediate coat enhances overall strength and impact resistance, while the topcoat provides excellent anti-friction properties and chemical stability, blocking external erosion. The synergistic effect of these three components significantly extends the service life of concrete structures in harsh environments.

A hydropower station underground gate shaft maintenance stair channel closing facility comprises channel steel, expansion bolts, double-nut bolts and a steel plate. The length of the channel steel is smaller than that of the long side of an orifice, and a phi 25mm hole is drilled in a web of the channel steel and fixed on the side wall through a first expansion bolt; phi-18mm holes are uniformly drilled in channel steel wing plates and staggered with web plate holes, and double-cap bolts penetrate through the wing plate holes and then are welded and fixed. Holes with the diameter phi being 16 mm are drilled in the side beams, second expansion bolts are embedded in the holes, and the holes in the two sides of the hyacinth-bean-shaped riffled plate correspond to the side beams and channel steel wing plate hole positions and are provided with lifting ring installation holes and rectangular lifting rings. And one side of the steel plate is connected with the side beam through a second expansion bolt, and the other side is connected with the channel steel through a double-nut bolt to fill the orifice to realize closing. According to the facility, efficient sealing is achieved through common materials, rapid dismounting and repeated mounting can be achieved, universality is high, safety is high, and the facility is suitable for the flexible sealing requirement of the hydropower station underground gate shaft overhaul channel.

The invention provides an RO (reverse osmosis) device assembly mounting and positioning method and system based on a total station, and relates to the field of water purification. The RO device assembly mounting and positioning system based on the total station comprises a high-precision automatic tracking total station, a special optical reflection target and adapter, an integrated control terminal, a communication unit and power supply and auxiliary equipment. By ensuring natural centering of all components, residual stress generated in a pipeline, a flange and a container due to forced correction is avoided, the long-term operation risk caused by stress corrosion and fatigue cracking is fundamentally eliminated, accurate flange centering and parallelism control are achieved, it is ensured that a gasket is evenly stressed, and the service life of the gasket is prolonged. The probability of leakage in operation is greatly reduced, the intrinsic safety of the system is improved, the system converts complex space judgment into simple locating operation according to pictures, ordinary workers can complete high-precision operation under guidance, and the pressure of shortage of professional skill talents is relieved.

The utility model relates to outer wall hole hole plugging technical field, and disclose a kind of outer wall wall pipe plugging structure, including sleeve, plugging mechanism and wall pipe, the sleeve is fixedly connected on building outer wall and will outer wall be penetrated, the wall pipe is sleeved in the inside of sleeve, the plugging mechanism is arranged in the both ends of sleeve to close the gap between sleeve and wall pipe, the inner wall of sleeve is equipped with detachable rubber ring, the utility model provides a kind of outer wall wall pipe plugging structure, the cooperation setting of sleeve and wall pipe is in, sleeve can be pre-buried in wall body before construction, so that subsequent wall pipe is arranged in sleeve, reduce subsequent construction time on wall body, by the plugging mechanism being arranged between sleeve and wall pipe, the gap between sleeve and wall pipe can be filled, prevent dust, rain, biology etc. from the gap into house.