523 results about "Water barrier" patented technology

A lifting type lock head water retaining system suitable for rapid water level change mainly comprises a working door, an access door, a working door groove, an access door groove and the like. The working door comprises a working gate which is arranged in the working door groove, and the upper end of the working gate ascends and descends through a lifting device; locking devices are arranged on the left side and the right side of the working gate, a plurality of sets of water retaining locking grooves are formed in the corresponding working gate grooves at intervals in the height direction, and the locking devices and the corresponding water retaining locking grooves are locked or unlocked. The access door comprises a plurality of sections of access stop log doors arranged in the access door groove, and the access stop log doors ascend and descend through an access door hoist; the working gate groove extends downwards by a certain depth along the bottom of the channel, and when the working gate is adjusted to the highest position from the lowest position, the bottom of the working gate is always lower than the bottom of the channel. According to the lifting type lock head water retaining system suitable for rapid change of the water level, the water retaining height is convenient and rapid to adjust, overhaul and maintenance are convenient, and the automation degree is high.

The invention relates to a composite cable, and relates to the technical field of cables, the composite cable comprises a conductor layer, a composite insulating layer, a waterproof layer, a weather-proof sheath layer and an armor layer from inside to outside in sequence, the conductor layer comprises at least six tinned copper conductors, the tinned copper conductors are symmetrically arranged in a regular hexagon shape, dielectric elastomers are filled among the conductors, and the dielectric elastomers are arranged between the tinned copper conductors. The composite insulating layer comprises an inner shielding layer, a main insulating layer and an outer shielding layer from inside to outside, the waterproof layer is a fluororubber extruded layer, the weather-proof sheath layer comprises a bonding transition layer and a weather-proof functional layer, and the armor layer is of a stainless steel band spiral wrapping structure. The composite cable can meet the requirement for high performance in a harsh environment and can show excellent performance under the extreme conditions of low voltage, large day and night temperature difference, strong ultraviolet rays, sand and dust abrasion, acid rain corrosion and the like.

The invention relates to the technical field of water conservancy projects, in particular to a cofferdam for ship lock transformation and a construction method. A cofferdam for ship lock transformation comprises concrete cofferdam bodies and hollow concrete supporting structures, the concrete cofferdam bodies are tightly attached to the wall faces on the two sides of a ship lock and extend in the water flow direction, and the hollow concrete supporting structures are arranged between every two adjacent concrete cofferdam bodies. The hollow concrete supporting structure is fixedly connected with the concrete cofferdam body through a connecting device, the hollow concrete supporting structure comprises a bottom layer, a hollow layer and a top layer, a plurality of rows of cavities arranged side by side are formed in the hollow layer, and blasting devices are pre-buried in the concrete wall between every two adjacent cavities at equal intervals. The concrete cofferdam body is tightly attached to the wall face of the ship lock, a stable water retaining barrier can be formed, the self weight can be reduced through the design of the hollow layer, and compared with traditional mechanical or manual dismantling, efficient and controllable dismantling can be achieved through the blasting device embedded in the supporting structure, and the construction period can be greatly shortened.

The invention relates to the technical field of marine ranches, and discloses a wind-wave resistant marine ranch breeding device, comprising eight fences used for enclosures in a breeding farm, a water retaining plate for preventing waves, a shielding device for shielding wind and waves, a sliding device for driving the shielding device to move, and a buoy for sensing wind and waves, wherein the eight fences form an annular enclosure, a water retaining plate is arranged between the eight fences, a shielding device is arranged at the upper end of the fence, a sliding device is arranged between the inside of the fence and the shielding device, and buoys are fixedly connected to the outer walls of the eight fences by ropes, and the wind-wave resistant marine ranch breeding device utilizes the impact before the arrival of the waves to drive the buoy to impact forward, so that the buoy has a pulling force outward, thereby driving the sliding device, so that another layer of fences in the fences move upward, and the fences attract each other to form a conical shielding plate, which shields the wind and waves from impacting from above, and effectively shields the comprehensive impact of the wind and waves on the marine ranch.

The invention relates to the technical field of industrial production clean environment-friendly equipment, in particular to a liquid medicine sediment adsorption head and liquid medicine sediment adsorption equipment. The liquid medicine sediment adsorption head comprises an air suction pipe, an air blowing pipe, a waterproof cover and a cleaning brush. The air suction pipe is used for sucking away sediments, an adsorption opening is formed in the bottom of the air suction pipe, and the air suction pipe is connected with a negative pressure source; the waterproof cover is mounted at the bottom of the air suction pipe, the top of the waterproof cover sleeves the air suction pipe and is sealed, the bottom of the waterproof cover is open, and the waterproof cover is bowl-shaped and inversely buckled at the pool bottom; a positive pressure cavity is defined by the waterproof cover and the pool bottom, and the adsorption opening is formed in the positive pressure cavity with the opening facing downwards. The air blowing pipe is connected with a positive pressure source and provided with a plurality of air outlets, and the air outlets of the air blowing pipe are arranged around the bottom edge of the waterproof cover; and the cleaning brush is mounted in the waterproof cover. Through the arrangement, the positive pressure cavity filled with air is created in water by utilizing the waterproof cover, and sediments at the bottom of the tank are adsorbed by taking air as a medium, so that a large amount of liquid is prevented from being sucked away, and disturbance to the liquid is reduced.

The invention discloses a water conservancy project water retaining construction water stop anti-seepage device which comprises a water stop plate, a switching assembly, a supporting assembly and a stretching assembly, one side of the water stop plate is fixedly connected with a positioning frame, the interior of the water stop plate and the interior of the positioning frame communicate with each other, and the two ends of one side of the water stop plate are each provided with a vertical groove allowing the supporting assembly to be unfolded. Scraping plates are fixedly connected to the two sides of the water stop plate and correspond to the stretching assemblies in position. By arranging the supporting assembly, the water stop plate is supported, and meanwhile the load borne by the water stop plate is effectively dispersed; by arranging the stretching assembly, plugging and water stopping are achieved by self-adaption to the width of the water channel, the stretching process has self-locking performance, and the risk that water flow leaks at the gap is further effectively reduced; and by arranging the switching assembly, the device is automatically switched to the water channel plugging operation after completing the supporting and unfolding operation, so that the operation amount of personnel is effectively reduced, and the working efficiency of the device is improved.

The utility model discloses an unmanned intelligent environmental protection monitoring device, which relates to the technical field of monitoring devices, and particularly comprises a water blocking gate, a water storage tank and a water storage tank, the gathering plate is mounted at the front end of the water blocking gate and used for gathering garbage floating on the water surface; the salvage part is mounted on the water blocking gate and used for salvaging garbage floating on the water surface, and one end of the salvage part extends to the position below the gathering plate; the collecting frame is installed on the back face of the water blocking gate and used for collecting the floating garbage fished by the fishing component; and the driving component is used for driving the fishing component to circularly move along the fishing path. The unmanned intelligent environmental protection monitoring device can drive a water quality monitor to ascend and descend along with ascending and descending of the water surface height so as to adapt to monitoring of different water surface environments, a first gear of a driving motor working belt rotates to drive a second gear to work through a chain, and therefore a fishing net is driven to move; and the salvage net is matched with the salvage plate to convey the horizontally floating garbage into the collection frame for collection.

The invention provides a rock stratum reconstruction locatable overlying strata separation layer grouting filling method which comprises the following steps: comprehensively determining the position, thickness and physical and mechanical parameters of each rock stratum according to a geological drilling histogram to obtain the position of each key stratum and the heights of a caving zone, a fissure zone and a bending sinking zone; the nearest key layer above the fissure zone is selected as a target layer position, and directional drilling is constructed below the key layer to conduct hydraulic fracturing on the rock stratum; a low-permeability plasticized cementing material is injected into the rock stratum in a pressing mode, and the rock stratum is reconstructed into a low-permeability plastic water-resisting layer; before the goaf is generated, the separation layer grouting hole is constructed to the position above the low-permeability plastic water-resisting layer, and clear water is poured into the separation layer grouting hole; after a coal face is stoped, the low-permeability plastic water-resisting layer sinks along with collapse and sinking of overlying strata in a goaf, and a separation layer space is generated between the low-permeability plastic water-resisting layer and a key layer above the low-permeability plastic water-resisting layer; after it is observed that the water level of the grouting hole rapidly drops, bed separation grouting materials are injected into the hole in a pressure mode; when the grouting pressure reaches the designed final pressure, the grouting work of the hole can be stopped; according to the method, the low-permeability plastic waterproof rock stratum is reconstructed through hydraulic fracturing, and the method capable of accurately positioning the reasonable grouting layer position is provided for the overlying strata separation layer grouting technology of a rock stratum without obvious soft and hard rock occurrence conditions or a mine under the condition that no effective-thickness waterproof layer serves as a protective layer below the separation layer space.

The present invention relates to the technical field of water conservancy engineering, and specifically to a cofferdam for ship lock reconstruction and a construction method. A cofferdam for ship lock reconstruction comprises a concrete cofferdam body and a hollow concrete support structure. The concrete cofferdam body is closely attached to the walls on both sides of the ship lock and extends along the direction of water flow. The hollow concrete support structure is arranged between two adjacent concrete cofferdam bodies. The hollow concrete support structure is fixedly connected to the concrete cofferdam body by a connecting device. The hollow concrete support structure comprises a bottom layer, a hollow layer, and a top layer. Multiple rows of cavities arranged in parallel are formed inside the hollow layer. Blasting devices are equidistantly embedded in the concrete wall between two adjacent cavities. This application forms a stable water retaining barrier by placing the concrete cofferdam body close to the ship lock wall. The hollow layer design can reduce its own weight. In addition, the blasting device embedded in the support structure can achieve efficient and controllable demolition compared to traditional mechanical or manual demolition, which can greatly shorten the construction period.

The present invention discloses a rapid anti-water gushing device for underwater tunnels, comprising: an inflatable airbag fixedly arranged on the side wall of the tunnel lining; an air pump arranged outside the tunnel and used to inflate the airbag; and a plurality of restraint belts arranged outside the airbag and used to restrain the airbag in a compressed state. The rapid anti-water gushing device for underwater tunnels of the present invention is suitable for tunnels of various cross-sectional shapes, and solves the problems that the tunnel water retaining device occupies the tunnel clearance, affects construction and transportation, is restricted by surrounding rock conditions, and is difficult to build and dismantle. When a water gushing accident occurs in the tunnel, the air pump can be turned on the ground to form a water retaining wall, and a blocking wall can be quickly established through ground control. The operation is convenient and quick, and it can be quickly put into use to prevent the spread of water, provide buffer time for rescue, and ensure the safety of personnel and equipment behind the work side.

Described herein are fascia rail mounts that are attached to a structure, such as a deck. The disclosed fascia rail mounts include threaded rods that mate with holes in a railing post to allow the railing post to be attached to the structure using the threaded rods, the threaded rods extending from a side plate that is adjacent to a fascia beam of the structure. The disclosed rail mounts are attached to the structure prior to applying any layers designed to protect the structure such that the fascia rail mounts, including the threaded rods, receive the protective layers. A waterproof layer can be applied to the structure after the fascia rail mounts have been affixed so that the threaded rods of the fascia rail mounts extend past the waterproof layer without compromising the waterproofing of the structure. In other words, the waterproof layer forms a waterproof barrier even with the threaded rods extending from the fascia rail mounts through the waterproof layer.

The invention belongs to the technical field of water environment treatment, and particularly relates to a self-cleaning device and method suitable for sewage pipeline deposition. The self-cleaning device comprises an inspection well, an upstream water inlet pipe and a downstream water outlet pipe, a horizontal supporting plate is connected to the side wall of the inspection well, and a gravity plate is placed on the upper surface of the free end of the horizontal supporting plate; the end, away from the water inlet, of the gravity plate is connected with an inclined water baffle, a water storage area is formed among the horizontal supporting plate, the inclined water baffle and the inspection well, and the middle or the lower portion of the inclined water baffle is connected with a twisting shaft. A reservoir is arranged at the top of the inclined water baffle, and a drainage hole is formed in the bottom of the reservoir; along with the change of the water volume of the water storage area, the gravity plates at the two ends of the inclined water baffle and the reservoir rotate up and down relative to the twisting shaft, so that water storage at a low water level and instant high-level drainage at a high liquid level can be realized. According to the method, the pollutant deposition amount of the sewage pipeline and the inspection well can be remarkably reduced, and meanwhile efficient pollutant transfer is achieved.

The present invention discloses a water-stopping and anti-seepage device for water retaining construction of a water conservancy project, comprising a water stop plate, a switching component, a support component and an extension component, one side of the water stop plate is fixedly connected with a positioning frame, and the insides of the water stop plate and the positioning frame are interconnected, both ends of one side of the water stop plate are provided with vertical grooves for the support component to unfold, and both sides of the water stop plate are fixedly connected with scrapers, and the scrapers correspond to the extension component. The present invention provides support to the water stop plate while effectively dispersing the load on the water stop plate by setting a support component; by setting an extension component, the width of the water channel is adaptively adjusted to achieve blocking and water stopping, and the extension process has self-locking properties to further effectively reduce the risk of water leakage at the gap; by setting a switching component, the device automatically switches to the water channel blocking operation after completing the support unfolding operation, effectively reducing the amount of operation of personnel to improve the working efficiency of the device.

The invention provides an underwater laser coaxial fuse repairing device and method based on energy controllability, and belongs to the technical field of underwater laser repairing, the underwater laser coaxial fuse repairing device comprises a cover plate, an energy controllable point ring light spot system, an inner layer exhaust cavity and an outer layer drainage cavity, the cover plate is arranged at the top of the outer layer drainage cavity, and the inner layer exhaust cavity and the outer layer drainage cavity are symmetrically arranged; the energy controllable point ring light spot system is arranged in a structure composed of the two inner layer exhaust cavities, the two inner layer exhaust cavities are arranged in a structure composed of the two outer layer drainage cavities, the bottoms of the outer layer drainage cavities are communicated with a water retaining cover, and a wire feeding mechanism is arranged on one side of the water retaining cover. The problems of energy control, environment interference, repairing quality and the like in the underwater laser fuse repairing process are effectively solved, and high-quality and high-efficiency underwater workpiece repairing is achieved while the coaxial fuse is guaranteed.

A composite transparent photovoltaic adhesive film comprises two EVA layers and a POE layer, and the POE layer is a key factor for reducing water vapor transmittance. Low density polyethylene (LDPE) is added into the POE layer to improve the water blocking rate. The improved composite transparent photovoltaic adhesive film can have a better water blocking effect, water vapor penetrating through corneas is reduced, the water vapor makes contact with TOPCon battery pieces, and the battery pieces are better protected.

The invention provides a water-blocking and oxygen-blocking polyethylene composite material and a preparation method thereof. The water-blocking and oxygen-blocking polyethylene composite material is prepared from the following components in parts by weight: 80-95 parts of polyethylene, 5-20 parts of ethylene-vinyl alcohol copolymer, 2-10 parts of hydroxylated glass fiber, 2-8 parts of montmorillonite, 0.5-4 parts of polyhydroxy sulfonic acid quaternary ammonium salt and 0.1-3 parts of auxiliaries. The composite material provided by the invention has high oxygen resistance and water resistance, the tensile property and the impact strength also meet the use requirements, and the composite material is suitable for preparing a polyethylene film.

The invention relates to the technical field of waterproof walls, in particular to a waterproof wall system and a construction method thereof.The waterproof wall system comprises a ground and walls piled on the ground, countersunk grooves are formed in the ground, the walls are located over the countersunk grooves, and waterproof non-woven fabric is arranged between the bottoms of the walls and the ground in a pressed mode; the waterproof non-woven fabric comprises vertical cloth and horizontal cloth which are perpendicular to each other, one side of the horizontal cloth is attached to the interior of the countersunk head groove, and a countersunk head pressing block is embedded in the countersunk head groove. The waterproof non-woven fabric is designed, waterproof is conducted on wall and ground joints, meanwhile, the technology that the pressure of wall pressing ground is matched with countersunk grooves and the waterproof non-woven fabric is adopted, the waterproof grade of the wall and ground joints is improved, the brick body is structurally improved, so that horizontal and vertical brick joints of a wall body can be sealed by the water retaining strips, water vapor is prevented from passing through the brick joints, and the waterproof effect of the wall and ground joints is improved. The waterproof grade of the wall body is improved.

The invention discloses a photovoltaic module and a photovoltaic system, relates to the technical field of photovoltaics, and is used for solving the problem of packaging and sealing. The photovoltaic module comprises a cover plate and a back plate which are oppositely arranged; the battery pack is arranged between the cover plate and the back plate; the battery pack is fixed with the cover plate and the back plate through the packaging adhesive film; the waterproof layer is arranged on the outer side of the packaging adhesive film; wherein the water vapor transmittance of the water-blocking layer is smaller than that of the packaging adhesive film, and the size of the water-blocking layer is smaller than that of the packaging adhesive film in the direction from the water-blocking layer to the packaging adhesive film. Compared with an existing photovoltaic module, the water vapor transmittance of the water-blocking layer is smaller than that of the packaging adhesive film, and the water-blocking layer is located on the outer side of the packaging adhesive film, so that the water-blocking capacity is better when the battery pack to be packaged and protected is closer to the outer side and closer to the air environment. The combination of the waterproof layer on the outer side and the packaging adhesive film on the inner side can well isolate water vapor invasion, and plays a role in protecting the reliability of the electrode on the battery piece.

The application discloses a mineral-based easily-recyclable compostable water-barrier coating and a preparation method thereof, and belongs to the technical field of paper-based packaging materials. The coating is formed by a biodegradable film-forming system and a hierarchical lamellar mineral system containing three different scales and morphologies. The mineral system contains specific morphology and size of lamellar kaolin, non-asbestos grade lamellar talc and fully exfoliated sodium montmorillonite. The mineral lamella forms a dense parallel spread barrier path in the coating through a specific coating and drying solidification process, and combines a pH value responsive reversible cross-linking system to achieve excellent water vapor and oxygen barrier properties, water resistance and oil resistance at a low dry weight of 8-15 g / m2. The coating system does not contain polyvinylidene chloride and perfluoro and polyfluoro alkyl substances. The paper-based material coated with the coating is easily defibered and recycled under standard alkaline warm water conditions, and the fiber recovery rate is high, and meanwhile, the whole material meets the industrial composting requirements.

The utility model discloses a return water blocking structure for a hot melt adhesive cooling water tank, which is arranged at the tail end of the hot melt adhesive cooling water tank and comprises a return water tank, a filter screen plate, a first filter screen cage, a water collecting tank and a return water pump, the water return pool is communicated with the hot melt adhesive cooling water tank, the filter screen plate is detachably connected into the water return pool and divides the water return pool into a confluence area and a filter area, a water outlet is formed in the bottom of the water return pool, and the water return pool is connected with the water inlet end of the water collection tank through the water outlet; the water return pump is arranged in the water collecting tank and used for discharging cooling liquid in the water collecting tank. The water outlet is located in the filtering area, and the first filter net cage is placed in the filtering area and located above the water outlet. The backwater blocking structure is applied to the hot melt adhesive cooling water tank, cooling liquid is secondarily filtered by arranging the filter screen plate and the first filter screen cage, chippings-shaped hot melt adhesive or impurities floating in the cooling liquid are filtered out, the chippings-shaped hot melt adhesive or impurities are prevented from blocking a water inlet of a backwater pump, and the situation that the backwater pump breaks down is reduced.

The invention relates to the technical field of muck trucks, in particular to a muck truck capable of being automatically cleaned after unloading, a baffle part is rotatably arranged at the tail end of a carriage part and used for sealing the carriage part, and a bulldozing part is slidably arranged in the carriage part and used for pushing out construction waste in the carriage part; the bulldozing plate pushes muck above the carriage to the tail, the soil shoveling plate shovels garbage adhered to the bottom of the carriage and pushes the garbage to the tail, and the brush sweeps granular garbage at the bottom of the carriage to the tail, so that a large amount of garbage is prevented from being left in the carriage; the rotating water throwing fan blades throw water flow out of the water throwing cones, and the bottom face and the inner sides of the side walls of the compartment are cleaned. When the second direction adjusting ring rotates, the second direction adjusting ring swings up and down, so that water flow is thrown out from the diffusion cone along different radiuses, the bottom surfaces of the carriages in different ranges are cleaned, and omission is prevented; part of water thrown out by the diffusion cone and the water throwing cone falls on the water baffle and falls down along the water collecting cone to clean the inner side and the outer side of the side wall of the carriage.

Power cables are provided having a joint with a metallic water barrier and, in particular, metallic water barrier materials for cable joints for use in high voltage cables for both land and submarine applications.

The utility model provides a prefabricated vertical shaft pipe piece ring which comprises a steel plate cylinder, a flange ring, concrete and an anchor clamp. The concrete is poured in a cavity defined by the lower end face of an upper flange ring and the upper end face of a lower flange ring of the flange ring and the outer wall face of a steel plate inner cylinder and the inner wall face of a steel plate outer cylinder of the steel plate cylinder. The projection of the anchor clamps in the vertical direction is in a U shape, the free ends of the anchor clamps are connected to the outer wall face of the steel plate inner cylinder or the inner wall face of the steel plate outer cylinder, the multiple anchor clamps are evenly distributed around the axis of the steel plate cylinder and divided into multiple layers from bottom to top, and the anchor clamps of the adjacent layers are distributed in a staggered mode and can be matched with the anchor clamps to anchor concrete. The integral strength is improved, the wall thickness of the prefabricated vertical shaft segment ring is thinner under the same strength, the influence on the vertical shaft excavation diameter is reduced, the work amount of vertical shaft construction is not increased, after a shaft is manufactured, the inner wall face and the outer wall face of the shaft are steel plates, the waterproof performance is relatively better, and when accessories are installed in the shaft, direct welding connection can be achieved, and more convenience is achieved.

The invention provides a coal seam floor water disaster treatment scheme determination method and related products, and relates to the technical field of mine water disaster prevention and control. The method comprises the steps of determining a target aquifer with a water inrush risk based on the influence degree of each aquifer of a coal seam floor on mining safety and the influence degree of mining on each aquifer of the coal seam floor; determining the type of the target aquifer based on the hydrological parameters of the target aquifer; and on the basis of the type of the target aquifer, the treatment mode of the target aquifer is determined as drainage depressurization transformation, local grouting transformation, regional grouting transformation or grouting reinforcement of a water-resisting layer. According to the method, a systematic scheme determination method is formed from evaluation and determination of the aquifer with the water inrush risk to giving of the targeted water disaster treatment scheme based on the hydrological parameters of the aquifer. Meanwhile, due to the fact that the influence of the aquifer on mining and the influence of mining on the aquifer are considered, the mining safety is guaranteed, and the economical efficiency is considered by introducing the classified treatment modes such as drainage and pressure reduction transformation.

The invention relates to the technical field of steel metallurgy steelmaking continuous casting, and provides a cooling control device of a continuous casting machine fan-shaped section, the cooling control device is arranged on a machine frame of a continuous casting machine, the continuous casting machine is provided with a roller row and a nozzle installation frame, the roller row and the nozzle installation frame are both arranged on the machine frame, and the cooling control device is located between the roller row and the nozzle installation frame. The water retaining piece is arranged on the rack and located between the roller row and the nozzle mounting frame, and the water retaining piece is provided with a first containing groove; the telescopic water baffle is movably arranged in the first containing groove and used for blocking water flow sprayed out of the nozzle on the nozzle mounting frame. The output end of the automatic adjusting mechanism is arranged on the telescopic water baffle and used for driving the telescopic water baffle to move. By means of the technical scheme, the problem that the corner of a narrow-section steel billet is prone to being subjected to gathered water flow, internal stress is generated, and then the quality of the corner of the steel billet is poor is solved.

The invention relates to the technical field of wire harness adapters, in particular to a waterproof high-definition wire harness adapter applied to an AI robot. The device comprises an adapter plug and an adapter base, a conductive column is arranged at the end of the adapter plug, guide blocks are arranged on the two sides of the end of the conductive column, a conductive groove is formed in the adapter base, a water retaining assembly is arranged on the surface of the adapter plug and used for automatically sealing the guide groove in the end of the adapter base, and a water absorbing assembly is arranged in the water retaining assembly. When water flows through the check ring and the end of the adapter, the water flows through the surface of the ring pipe due to the fact that the groove is formed in the check ring and the ring pipe is arranged at the end of the groove, the water flows in from the through holes and is adsorbed by the sponge due to the fact that the multiple through holes are formed in the surface of the ring pipe, and meanwhile the ring pipe is subjected to the effect of the compression spring; and the side wall is always attached to the end part of the adapter, so that water flowing through a gap between the check ring and the adapter is completely adsorbed, and the waterproof effect of the adapter is improved.

The invention provides a paper-plastic cup package and a preparation method thereof. The package comprises a cup body and a cover film, wherein 150-300g / m < 2 > paper serves as a base material layer of the cup body, and a coated polylactic acid barrier layer and a composite heat sealing layer are sequentially arranged on the inner side of the base material layer. Wherein the barrier property of the barrier layer is enhanced through aluminizing / silicon oxide / aluminum oxide, the heat sealing layer adopts a gradient structure of a blend of PBS at the center part and PBS / PCL at the edge part, and a PCL content linear increasing mixing region with the width of 3-5mm is arranged at the edge part to optimize thermal stress distribution. According to the preparation method, the base material layer, the barrier layer and the heat sealing layer are bonded step by step through a dry type composite technology, and interlayer combination is achieved by combining hot press molding and a multi-stage curing technology; the cup body forms a sealing structure matched with the concave ring of the cover body through rolling flanging, and the cover body is integrally connected with the cup body through heat sealing. The structure adopts a full-degradable material system, has excellent oxygen-blocking / water-blocking performance and heat-sealing reliability, and is particularly suitable for long-shelf-life packaging requirements of liquid food such as yoghourt and the like.

The utility model relates to a cable, and aims to provide a salt-fog-resistant high-water-blocking bending-resistant seamless aluminum extruded tube coaxial cable, which has the characteristics of salt fog resistance, corrosion resistance, good water-blocking property and small bending-resistant radius. According to the technical scheme, the salt-mist-resistant high-water-resistance bending-resistant seamless aluminum extruded tube coaxial cable comprises an inner conductor, and an insulating inner layer, an insulating foaming layer, a shielding layer and a sheath layer which are sequentially coated outside the inner conductor from inside to outside, the cable is characterized in that the inner conductor is made of high-strength copper-clad aluminum, the insulating inner layer is a salt-mist-resistant low-density polyethylene insulating layer, the insulating foaming layer is a physical foaming polyethylene layer, the shielding layer is a seamless aluminum tube, and the sheath layer is a vinyl chloride layer. An insulating outer surface bonding layer is arranged between the insulating foaming layer and the shielding layer, a waterproof layer is arranged between the shielding layer and the sheath layer, and a waterproof layer is arranged between the shielding layer and the sheath layer.

The utility model relates to the technical field of water diversion and drainage in tunnel excavation construction, in particular to a seepage water diversion and drainage device of a diversion tunnel. According to the technical scheme, the seepage water guiding and discharging device of the diversion tunnel is characterized by comprising a water filtering structure which is arranged on a tunnel rock wall of the diversion tunnel, covers seepage points on the tunnel rock wall and is used for filtering water seeping from the seepage points; the water blocking and draining structure is arranged on the downstream face of the water filtering structure through a fixing piece, and a water draining cavity is formed between the water blocking and draining structure and the water filtering structure; the water collecting structure is arranged at the bottoms of the water filtering structure and the water blocking and draining structure, and a water collecting cavity communicated with the water draining cavity is formed in the water collecting structure; the water diversion pipe is arranged at the bottom of the water collection structure, the water diversion pipe is communicated with the water collection cavity, and the water diversion pipe is used for guiding and discharging water in the water collection cavity.

The invention relates to an underground tunnel construction method and system, and relates to the field of underground tunnel construction.The underground tunnel construction method comprises the steps that geological stability influence analysis is conducted according to optimal waterproof barrier layout distribution, first geological stability distribution is obtained, tunnel construction simulation is conducted, and first construction time information is obtained; correcting the first construction time information according to the construction time of the waterproof barrier to obtain first corrected construction time information; according to the first corrected construction time information, the first geological stability distribution and the maximum waterproof score, a first tunnel construction score is obtained through calculation, tunnel route planning optimization continues to be conducted, and an optimal tunnel route is obtained. Through the method, the technical problem that the construction progress and the construction safety are affected due to the fact that tunnel route planning cannot accurately avoid an underground water high-risk area due to the fact that a traditional method lacks accurate evaluation on underground water influence factors can be solved; the scientificity and the accuracy of tunnel route setting can be improved, and the construction progress and the construction safety are ensured.