40results about How to "Reduce penetration" patented technology

The utility model relates to the technical field of pipeline accessories, and disclose a kind of urban water supply pipeline fast repair joint of self-adapting different pipe diameter, left half ring and right half ring are away from the one end of hinged axle and hinge by bolt and nut detachable installation, the inside of right half ring is embedded with connecting pipe, the outside one end of connecting pipe is connected with external connection pipe, the inside movable mounting of external connection pipe has ball core body, the inside of ball core body is provided with through-hole, the top and bottom of ball core body are all fixedly installed with axle rod, the end of axle rod is fixedly installed with turntable, the outer wall of external connection pipe and located the outside of axle rod is provided with locking assembly. When two rubber pads are folded, the inner arc surface of both is elliptical, because the inner arc surface of rubber pad is larger, the inside of rubber pad is provided with deformation hole, so that the folding of left half ring and right half ring can be well applied to different outer diameter pipes.

This invention discloses the application of the apple MdWRI1 gene in regulating the wax content of apple fruits and leaves, belonging to the field of plant genetic engineering technology. This invention isolates an MdWRI1 gene with high expression levels in apple varieties with high wax content, its nucleotide sequence of which is shown in SEQ ID NO.1. Subcellular localization revealed that the transcription factor expressing the MdWRI1 gene is located in the cell nucleus. Experimental results show that overexpression of the MdWRI1 gene can significantly increase the wax content of apple fruits and leaves by promoting wax biosynthesis, indicating that the MdWRI1 gene plays a key role in regulating the wax content of apple fruits and leaves. This invention provides an efficient and rapid approach for apple breeding, provides genetic material for improving apple quality, and has broad application prospects in improving the economic and ecological benefits of apple cultivation.

This invention relates to the field of oil extraction technology and discloses an oil extraction drill pipe fixing device, including a support base. A limiting block is fixedly connected to the side wall of the support base. During the placement of the slips, the slider is subjected to the squeezing force from the support base, and the slip slides relative to the support base. After sliding along the inclined surface, the horizontal straight distance between the bottom of the slider and the limiting block becomes shorter, and the limiting block can just hold the bottom of the slider. After placement, the limiting rod is pushed to slide into the limiting groove, so that the limiting can be performed at the same time as the slip is installed. When it is removed after use, the operation can be reversed. This avoids the slip being subjected to a large upward impact force that would quickly push the slip out of the wellhead when the well pressure is too high or during a blowout, thus reducing the response time and improving the slip's blowout prevention capability and extending the response time.

This invention discloses a high-temperature resistant, high-density water-based drilling fluid for ultra-deep wells and its preparation method, belonging to the field of oil and gas drilling technology. The drilling fluid is composed of the following components in parts by weight: 100 parts water, 2-5 parts high-temperature resistant modified clay, 150-280 parts composite weighting agent, 8-15 parts high-temperature resistant polymer filtration loss reducer, 3-8 parts core-shell type high-temperature resistant flow modifier, 4-10 parts nano-composite plugging agent, and 2-5 parts high-temperature stabilizer. This invention effectively solves the technical problems of rheological runaway, increased filtration loss, and barite sedimentation in ultra-deep well high-density water-based drilling fluids under high-temperature conditions above 220℃ by utilizing the high-temperature expansion-disintegration mechanism of the core-shell type flow modifier, nano- to micron-level multi-stage plugging, and the close packing of spherical and irregular weighting materials. It exhibits temperature resistance up to 220℃ and a density of 2.80 g / cm³. 3 It has the advantages of low filtration loss under high temperature and high pressure and good sedimentation stability.

The present application relates to hoisting belt technical field, specifically to a kind of acid and alkali corrosion resistant marine engineering hoisting belt and its use method, including belt body and two hooks respectively installed in the both ends of belt body, clamps and swivel seat are arranged between hook and belt body, clamp is fixedly connected with swivel seat, belt body includes woven belt and acid and alkali resistant protective sleeve set in the outside of woven belt, the acid and alkali corrosion resistant marine engineering hoisting belt and its use method, when facilitating larger load articles, there can be more degrees of freedom, avoid generating larger instantaneous impact force and pulling apart between woven belt and fixed clamping plate.It can detect the clamping tightness between clamp and woven belt without removing acid and alkali resistant protective sleeve.The woven belt, clamp and swivel seat are corroded by seawater and salt mist penetration isolated by acid and alkali resistant protective sleeve.And after being eroded by seawater, acid and alkali resistant protective sleeve can be disassembled and cleaned.

The application discloses a drainage bag with an antibacterial functional layer and a preparation process thereof, and relates to the technical field of medical materials, and comprises the following steps: adding modified montmorillonite into N, N'-dimethylacetamide, uniformly mixing through ultrasonic, adding a polyurethane film, ultrasonic immersion for 60-120 min, drying, and obtaining a drainage bag substrate; adding polylactic acid into N, N-dimethylformamide, uniformly stirring and mixing, adding modified nano zinc oxide, uniformly mixing through ultrasonic, and then performing electrospinning to obtain an antibacterial coating fiber film; placing the antibacterial coating fiber film on the inner side surface of the drainage bag substrate, high-frequency heat sealing, assembling, and obtaining the drainage bag.

The utility model discloses a kind of composite aluminum alloy windows of high-efficiency sound insulation and heat insulation, including two groups of beam body, sound insulation cavity is set in the beam body, sound insulation block is filled in the sound insulation cavity, multiple hexagonal through-holes are passed through and set in the outer wall of sound insulation block, two groups of the beam body are connected by heat insulation bridge, the outer wall of beam body is provided with connecting groove and connecting along, multiple support columns are set in the sound insulation cavity, multiple the support column is obliquely arranged alternately, and inside is hollow shape.The utility model fills sound insulation block with hexagonal through-hole in beam body sound insulation cavity, and the layout of zigzag of hollow support column is alternately inclined, convert traditional single, double-cavity linear type sound wave path into composite path of multiple refraction+multiple reflection, effectively weaken the penetration of medium-high frequency noise, simultaneously, hollow structure of support column can be filled with sound-absorbing material, further inhibit structure sound transmission, solve the problem that traditional profile cavity directly conducts noise and is easy to deform after filling.

This invention relates to the field of lithium battery packaging materials technology, and discloses a flexible packaging film for battery cells and its preparation process. The flexible packaging film comprises a protective outer layer, a first adhesive layer, an aluminum foil layer, a second adhesive layer, and a heat-sealing inner layer stacked sequentially, wherein a corrosion-resistant bonding layer is disposed between the aluminum foil layer and the second adhesive layer. The corrosion-resistant bonding layer is formed by curing and cross-linking a coating liquid containing a surface-functionalized graphene oxide-supported nano-layered zirconium phosphate composite on the surface of the aluminum foil. The heat-sealing inner layer is a multilayer co-extruded functional polypropylene film layer comprising an adhesive transition layer, a support layer, and a heat-sealing layer. By constructing a corrosion-resistant bonding layer at the aluminum foil interface and optimizing the multilayer structural design of the heat-sealing inner layer, the stability of the aluminum-plastic composite interface, the heat-sealing reliability, and the overall mechanical compatibility can be improved, thereby improving the comprehensive performance of the flexible packaging film for battery cells under high temperature, high humidity, and electrolyte contact conditions, making it suitable for the packaging of power batteries and energy storage batteries.

The utility model discloses a kind of heating disc and the liquid heater applied to it, it is related to heating disc technical field, comprising have: stainless steel contact layer, the stainless steel contact layer is used to directly contact with liquid, realize the heating conduction of liquid;Stainless steel base layer, the stainless steel base layer is used to bear thick film circuit or heating element, realize heat generation and conduction;Aluminum alloy soldering layer, the aluminum alloy soldering layer is between stainless steel contact layer and stainless steel base layer, for the welding of auxiliary stainless steel contact layer and stainless steel base layer;Stainless steel contact layer and stainless steel base layer of using S316 or S304 material, collocation porous aluminum alloy soldering layer, avoid heating disc surface rust, corrosion, prolong the service life of heating disc, while enhanced the overall structural stability of heating disc, and effectively improve heating efficiency, shorten the time of liquid heating.

The utility model relates to disaster relief tent device technical field, especially disaster relief tent of moistureproof, including disaster relief tent main part, the bottom of disaster relief tent main part is provided with moistureproof subassembly, moistureproof subassembly includes the multiple sets of ground support base of isolation from disaster relief tent main part bottom and ground water vapor, the utility model discloses a ground support base is set up in the bottom of disaster relief tent main part, and sets up the moisture absorption box in the ground support base inside, can directly isolate the water vapor of disaster relief tent main part and ground, and the ground support base of multiple sets of ground support base is through the bottom of disaster relief tent main part, can avoid the direct contact of disaster relief tent main part with ground, reduces the water vapor penetration from the source, at the same time, can adsorb the water vapor in the ground support base, guarantees the dryness in the ground support base, reduces the possibility of water vapor invasion, can prevent the tent ground and bedding damp, reduces the health risk of cold, rheumatism etc.

This invention discloses a solidification and stabilization agent and treatment method for sieved humic soil in landfills. The agent comprises: a cementing component, a heavy metal stabilizing component, an organic matter passivating component, a pore-regulating component, and a process conditioning component. The cementing component includes steel slag, fly ash, and sulfoaluminate cement; the heavy metal stabilizing component includes calcium dihydrogen phosphate and sodium sulfide; the organic matter passivating component includes potassium permanganate; the pore-regulating component includes desulfurized gypsum and an air-entraining agent; and the process conditioning component includes a polycarboxylate superplasticizer and a triethanolamine early-strength agent. This invention provides core strength through a synergistic cementing system of steel slag-fly ash-sulfoaluminate cement, combines a phosphate-sodium sulfide dual stabilization mechanism to fix heavy metals, uses potassium permanganate to oxidize and passivate humic acids, and introduces desulfurized gypsum and an air-entraining agent to regulate the pore structure. The agent of this invention can significantly improve the mechanical properties of the solidified body, reduce permeability, and effectively inhibit the leaching of heavy metals and organic pollutants.

This application provides a steel material for reactors and a method for preparing the same. The steel material for reactors includes a steel substrate and a protective coating. The protective coating includes an in-situ oxide layer on the surface of the steel substrate and an alumina layer on the in-situ oxide layer. The in-situ oxide layer includes α-Fe₂O₃, and the alumina layer includes α-Al₂O₃. In the steel material for reactors, the α-Fe₂O₃ in the in-situ oxide layer serves as a growth template for the alumina layer. Through the mutual matching and induction effect of crystal structures, the protective coating forms a dense protective barrier on the surface of the steel substrate, effectively reducing the permeation of hydrogen and its isotopes deuterium and tritium.

This invention belongs to the field of plant tissue culture technology, specifically relating to a tissue culture rapid propagation medium and method for rooting *Carex latifolia*. The invention provides a tissue culture rapid propagation medium for rooting *Carex latifolia*, comprising a rooting medium; the rooting medium uses 1 / 2 MS as the basal medium and further includes NAA 0.8 mg·L⁻¹, IBA 1.0 mg·L⁻¹, sucrose 30 g·L⁻¹, and agar 7 g·L⁻¹, with a pH of 5.8-6.0. The invention also provides a method for direct rooting of *Carex latifolia* through tissue culture rapid propagation. Aseptic seedlings of *Carex latifolia* have their outer, weaker leaves removed, and the original root system cut off, retaining 2-3 cm of the above-ground portion. These seedlings are then inoculated into the rooting medium for rooting culture to obtain rooted seedlings. After hardening off the rooted aseptic seedlings, the well-rooted *Carex latifolia* seedlings are transplanted into a substrate to form new, complete plants. The method for rapid propagation of broadleaf sedge by tissue culture provided by this invention has the characteristics of high rooting rate, large average number of roots, well-developed root system, high transplant survival rate, and robust regenerated seedlings.

This utility model discloses a steel fire door, including a door panel and a door frame. One side of the door panel is movably connected to the door frame via a hinge. The key feature is that an elastic contact electrode is provided on the hinged side of the door panel, and an electrode guide groove is provided on one side of the door frame. A door frame contact point is provided within the electrode guide groove, and a fireproof sealing cover is slidably installed at the opening of the electrode guide groove. A limit slot is provided on one inner wall of the electrode guide groove. An observation window is installed on the door panel, and a smart door lock is installed below the observation window. The smart door lock has a built-in temperature alarm module, and its power supply terminal is electrically connected to the elastic contact electrode. This utility model's overall technical solution, through the integration of mechanical structural innovation and intelligent monitoring technology, enhances the basic protective performance of the fire door while constructing a dual safety guarantee mechanism combining active fire early warning and passive structural protection.

This utility model relates to the field of ceramic body drying technology and discloses a multi-layer microwave-assisted continuous drying line for ceramic bodies. It includes a cover, with multiple sets of support components arranged equidistantly at the lower end of the cover to support the ceramic bodies. A base is located at the lower end of each support component, and a cavity is provided inside the base. The sidewalls of the cavity edges are movably supported on the bottom of the support components. Boxes are positioned between each pair of the equidistantly arranged support components. A rotating component is located on the side of the cover. By placing the ceramic bodies on multiple sets of support components, the ceramic bodies do not interfere with each other, preventing them from overlapping and significantly reducing microwave penetration and causing uneven drying. The rotating component allows the ceramic bodies inside the multiple sets of support components to rotate as a whole, further accelerating the heating and drying time, ensuring more uniform heating and drying, and saving energy.

This utility model provides a manual inflation fixture, belonging to the field of twin-tube shock absorber equipment. The fixture includes a sleeve, which is open at one end. During use, the sleeve end face and the cylinder end face (e.g., the cylinder body end face) are on the same horizontal plane, and the piston rod inside the cylinder (e.g., the shock absorber) is inserted into the sleeve through the sleeve opening. A sealing cavity is formed between the two end faces of the sleeve to prevent gas leakage. An air inlet is provided through the sleeve side wall, with one end connected to the sealing cavity and the other end connected to an external air source. This utility model is suitable for using a simple structure to inject nitrogen into a twin-tube shock absorber to compensate for its performance. At the intersection of the piston rod and cylinder, a component is used to pry open a gap in the oil seal. The sleeve is then fitted onto the intersection of the piston rod and cylinder, forming a sealing cavity between the two end faces. Gas is injected into the sealing cavity, and the gas enters the cylinder (e.g., the shock absorber) through the gap between the oil seals.

This invention discloses a corrosion-resistant tetrapropylene fluororubber sealing material for harsh environments in oil and gas fields, its preparation method, and its application. The sealing material is composed of the following components in parts by weight: 100 parts of tetrapropylene fluororubber raw rubber, 4-10 parts of methacryloxypropyl cage-like polysilsesquioxane, 1-3 parts of peroxide primary crosslinking agent, 30-60 parts of reinforcing filler, and 2-10 parts of processing aid. This invention uses methacryloxypropyl cage-like polysilsesquioxane as a co-crosslinking agent. Its inorganic Si-O-Si cage-like skeleton fundamentally eliminates the technical defects of traditional ester-based co-crosslinking agents, which are prone to hydrolysis, significantly improving the chemical stability of the crosslinking network in high-temperature acidic media. Combined with the synergistic effect of the reinforcing filler, the resulting material can meet the sealing requirements of harsh conditions such as high temperature, high pressure, and multi-media corrosion in oil and gas fields. The preparation process is simple and suitable for industrial production.

This invention provides a self-healing grouting material, its preparation method, and its application. By weight, the raw materials of the self-healing grouting material include the following components: 100 parts of cementitious material; 40-80 parts of water; 5-40 parts of polypropylene fiber-diatomite composite microbial carrier; 0-40 parts of mineral admixtures; and 0-5 parts of chemical additives. The polypropylene fiber-diatomite composite microbial carrier comprises a polypropylene fiber core layer and a diatomite gel shell layer. The diatomite gel shell layer is a gel network structure with embedded porous diatomite particles loaded with microorganisms. This invention solves the problem of insufficient timeliness of water-blocking performance in rock strata grouting in existing technologies, achieving long-term, adaptive sealing of seepage channels in rock strata fissures, and effectively enhancing the durable water-blocking capacity and overall stability of modified rock strata.

This invention discloses a method for establishing a carbon dioxide hydrate caprock on the seabed, belonging to the field of carbon dioxide sequestration technology. The method includes: establishing an injection well and a production well, both located in the seabed sedimentary layer, with the production well's opening above the injection well's opening; injecting liquid CO2 through the injection well; a portion of the injected liquid CO2 forms CO2 hydrate, while a portion migrates to the area where the production well's opening is located; extracting fluid through the production well at a pressure of 85%–115% of the CO2 gas-liquid equilibrium pressure under the temperature conditions in the production well's area, thus converting the liquid CO2 into gaseous CO2, enhancing CO2 hydrate formation, and obtaining a carbon dioxide hydrate caprock in the area where the production well's opening is located. This invention can enhance CO2 hydrate formation, obtain a carbon dioxide hydrate caprock, increase CO2 sequestration capacity, and reduce the risk of CO2 leakage.

This utility model discloses a waterproof low-pressure cabinet, comprising: multiple low-pressure cabinet bodies, with adjacent cabinet bodies interconnected based on a busbar parallel connection structure; each cabinet body contains a channel steel base and a channel steel frame, the channel steel frame being fixed to the channel steel base; the channel steel frame includes several sets of longitudinal plate frames, each set of longitudinal plate frames including multiple first and second plates; the first and second plates within each set of longitudinal plate frames are perpendicular to each other; each cabinet body has a waterproof door, the waterproof door being hinged to the cabinet body. This utility model, by setting a channel steel frame that fits against the inner wall of the cabinet body, distributes the force on the cabinet body to the channel steel frame, improving the overall load-bearing capacity, reducing the risk of deformation due to water pressure, and ensuring the low-pressure cabinet body maintains an IP68 waterproof and dustproof rating.

This utility model relates to the field of packaging partition technology, and in particular to a multi-chamber packaging partition for preventing odor transfer. It includes a partition plate, movable pressure blocks, sealing components, and pressing components. Multiple sets of movable pressure blocks are arranged on the side of the partition plate, and sealing components are arranged on the outer side of the partition plate. Multiple sets of pressing components are also arranged on the side of the partition plate, with each pressing component corresponding to one of the movable pressure blocks. The sealing component includes an adhesive layer, a hollow rubber layer, an injection tube, and a cap. An adhesive layer is arranged on the outer side of the partition plate, and a hollow rubber layer is arranged on the outer side of the adhesive layer. An injection tube is arranged on one side of the hollow rubber layer, and a cap is arranged at one end of the injection tube. This utility model expands the hollow rubber layer by injecting inert gas or gel, forming two deformable annular sealing rings. Combined with the linear pressing of the movable pressure blocks, the rubber layer can adaptively compensate for gaps when the packaging box is deformed under pressure, maintaining the sealing effect and significantly reducing the probability of odor transfer.

This invention discloses a carbon-plastic bipolar plate for a zinc-bromine flow battery, its preparation method, and its application, belonging to the field of electrochemical energy storage technology. The method includes: dispersing nitrogen-doped hollow carbon nanotubes and spraying them onto the positive electrode side of a carbon-plastic bipolar plate; after drying, a nitrogen-doped hollow carbon nanotube-modified positive electrode carbon-plastic bipolar plate is obtained; dispersing boron-nitrogen co-doped carbon and spraying it onto the negative electrode side of a pretreated carbon-plastic bipolar plate, after drying again, a boron-nitrogen co-doped carbon-plastic negative electrode carbon-plastic bipolar plate is obtained. On the positive electrode side, the nitrogen-doped hollow carbon nanotubes catalyze the bromine reaction through nitrogen doping, reducing the overpotential; the hollow structure adsorbs bromine species and uses charge action to inhibit bromine permeation, reducing self-discharge. On the negative electrode side, the boron-nitrogen co-doped carbon uses B-N zinc-loving sites to guide uniform and dense zinc deposition, inhibiting dendrite formation; and inhibits hydrogen evolution through charge regulation. Both methods synergistically improve the bromine barrier performance, reaction kinetics, and dendrite suppression ability of the carbon-plastic bipolar plate.

This invention relates to the field of cement building materials, specifically disclosing a cement-based protective material with both ion trapping and induced passivation functions and its application. The cement-based protective material comprises the following components: 95-100 parts by weight of magnesium phosphate cement, 4-6 parts by weight of retarder, and 20-25 parts by weight of composite modifier. The composite modifier comprises modified dry powder, calcium-containing dry powder, mixing water, and a dispersant, and the modified dry powder is obtained by calcining a layered bimetallic hydroxide with an aluminum source. The cement-based protective material of this invention exhibits high Cl- content... ‑ SO4 2‑ In addition to its excellent impermeability in CO2 environments, it can also actively capture corrosive ions, promote the formation and maintenance of a stable passivation film on the steel surface, thereby providing more long-lasting and reliable protection for marine steel structures.

This application discloses a composite waterproof structure for basement expansion joints, relating to the field of building expansion joint construction technology. It includes basement walls and expansion joints between the walls. A waterstop is installed along the length of the expansion joint on each wall between the expansion joints. Installation grooves are formed on both sides of the expansion joints along the length of the expansion joints. A cover plate is installed on the outer side of the expansion joint along the length of the expansion joint. Installation brackets are installed on the inner sidewalls of both installation grooves along the length of the expansion joint. The side of the installation bracket away from the expansion joint contacts the cover plate, and a connecting plate is installed on the side of the installation bracket closer to the expansion joint, connecting to the cover plate. A waterproof layer is provided between the installation bracket and the cover plate. The connecting plate pulls the cover plate against the installation bracket, and the waterproof layer waterproofs the gap between the cover plate and the installation bracket, minimizing the risk of the cover plate detaching from the expansion joint and allowing a large amount of water and debris to enter.

The utility model relates to a kind of carton with good moisture-proof and air permeability, including box, top cover and bottom cover, box outer side wall and inner side wall are all attached with moisture-proof film, four side wall edges of box, top cover edge and the edge of bottom cover are all pasted with support assembly, one side wall of box is provided with air inlet, opposite another side wall is provided with air outlet, air inlet is installed with air inlet drying mechanism, air outlet is installed with one-way air outlet mechanism.The utility model avoids moisture by setting support assembly and contacting ground, and is provided with air inlet drying mechanism and one-way air outlet mechanism, external humidity is blocked from entering and internal humidity can be exhausted.

The application discloses an assembled steel pipe recycled concrete column and a use method thereof, relates to the technical field of auxiliary devices for laser drilling of circuit boards, and comprises a threaded ring block, which is arranged above one side of a steel pipe recycled concrete column body, and the outer side of one side of the threaded ring block is provided with a threaded ring block limiting groove; an inner reserved air slot is arranged at the middle position of the steel pipe recycled concrete column body; an inner limiting ring block and a clamping inner circular block are arranged at the two sides of the inner reserved air slot; one side of the clamping inner circular block is provided with a leakage-proof lower ring block; the leakage-proof lower ring block and the clamping inner circular block are in an integrated structure; one side of the leakage-proof lower ring block is provided with a leakage-proof upper ring block. The assembled steel pipe recycled concrete column has higher combined stability through the design of the threaded ring block, and the combined design of the above elements can effectively reduce the shaking probability of the equipment during use.

The low-noise compressor shell comprises a shell body, a plurality of craters are arranged on the surface of the shell body, and the craters enable the surface of the shell body to form a honeycomb pitted surface. The surface of the compressor shell is treated to form craters, so that the surface of the shell presents a honeycomb pitted surface effect, the reflection path of sound waves is increased, the penetration of noise is reduced, the inherent frequency of the whole machine is improved and the resonance problem can be effectively avoided through the characteristic that the surface of the shell is uneven.

This invention provides a light-transmitting and water-blocking packaging film, comprising a packaging label layer, a front protective film, a back protective film, reinforcing sheets, carbon black areas, and a sealing frame. The packaging label layer, the front protective film, and the back protective film are composited to form a sandwich structure, with several reinforcing sheets disposed between them. Corresponding carbon black areas are provided on the packaging label layer, the front protective film, and the back protective film. The sealing frame is integrally formed on the surface of the back protective film. This invention uses a sandwich structure composite packaging label layer, etc., with circular glass fiber reinforcing sheets in between to improve tensile strength. The gradient carbon black areas at the edges of the three films absorb ultraviolet rays and resist aging. The inner adhesive area of ​​the arc-shaped sealing frame at the edge of the back protective film is sealed and water-blocking, protecting the items.

The utility model relates to a tent waterproof connecting structure and tent, tent waterproof connecting structure includes the left side waterproof cover piece and right side waterproof cover piece of covering in the connecting zip fastener surface, the left side waterproof cover piece has the left side sticking part and left side covering part through the crease separation, both form from bottom to top laminated structure folding upwards, right side waterproof cover piece has the right side covering part and right side plug -in part through the crease separation, both form from top to bottom laminated structure folding downwards, right side plug -in part inserts the gap between left side sticking part and left side covering part, forms four layers staggered and is pressed the labyrinth type waterproof barrier of superposition, left side sticking part contacts with zip fastener surface, four layers staggered and are pressed the waterproof barrier of superposition force rainwater to need to penetrate right side covering part, left side covering part, right side plug -in part and left side sticking part in succession only can infiltrate. The utility model discloses connecting structure's waterproof effect is good, through four layers staggered and are pressed the labyrinth type waterproof barrier design, rainwater is blocked by four layers of materials and realizes waterproof reliability significant leap.