7results about How to "Reduce water permeability" patented technology

The invention discloses a lignin-based liquid mulching film as well as a preparation method and application thereof, the liquid mulching film is prepared by taking lignosulfonate as a main raw material, compounding the lignosulfonate with chitosan and polyvinyl alcohol to form a basic solution, then carrying out crosslinking modification by epoxy chloropropane and complexing treatment by tetrakis hydroxymethyl phosphonium chloride, and finally adding nano kaolin and uniformly stirring. When in use, the fertilizer is diluted with water and then sprayed on the surface of soil to form a uniform covering film. According to the invention, a phenylpropane structure of lignosulfonate is fully utilized as a rigid framework of a polymer, and the obtained mulching film has good film-forming property, hydrophobicity and heat preservation and moisture conservation performance through a tackifying effect of chitosan, a toughening effect of polyvinyl alcohol and synergistic modification of the cross-linking agent and the complexing agent. The addition of the nano kaolin further enhances the infrared barrier ability of the mulching film and reduces heat loss at night.

The application belongs to the field of building construction, in particular to a deep foundation pit dewatering well sealing device, which comprises a base, a fixing frame is bolted on the top of the base, a winch is fixedly connected to the top of the fixing frame, a steel wire rope is fixedly connected to the winch, a first fixing seat is fixedly connected to the bottom end of the steel wire rope, an extension rod is fixedly connected to the bottom of the first fixing seat, a second fixing seat is fixedly connected to the bottom end of the extension rod, a cavity is formed in the first fixing seat and the second fixing seat, the fixing plate and the sealing plate are combined into an annular pipe by the above-mentioned setting, the annular pipe is attached to the inside of the dewatering well, which can block the groundwater, thereby facilitating subsequent control of the water level and subsequent well sealing steps, and can support the soft soil layer and reduce the occurrence of sand flow.

The utility model relates to the technical field of tunnel bridge engineering, and discloses a tunnel bridge roadbed anti-seepage reinforcing assembly which comprises a water tank, universal wheels are fixedly connected to the four corners of the bottom end of the water tank, a limiting plate is fixedly connected to the top end of the water tank, a reinforcing plate is arranged on one side of the limiting plate, and an L-shaped plate is fixedly connected to the top end of the reinforcing plate. A water drainage plate is fixedly connected to the position, close to the connecting position of one side of the bottom end of the L-shaped plate and the reinforcing plate, of the bottom end of the L-shaped plate, and a water guide pipe is movably connected to the outer wall, close to the front end, of the water drainage plate in a sleeved mode. And a screw rod is driven to move under thread engagement of a supporting seat, then a guide column and a limiting block are driven to move to the position, close to the bottom end, of the front side of a reinforcing plate, the bottom end of the reinforcing plate is extruded, the reinforcing plate is tightly attached to the bottom of the to-be-reinforced base face of the tunnel bridge, and the water seepage situation is reduced.

The application aims at the problem of long process connection time, and provides a highland tunnel waterproof and drainage integrated construction device, relating to the technical field of tunnel waterproof and drainage, comprising: a mobile trolley arranged along the longitudinal direction of the tunnel and provided with a walking mechanism at the bottom; a waterproof operation unit arranged at the front of the mobile trolley and comprising a waterproof plate winch mechanism, a hot melt welding mechanical arm and a grouting assembly, the waterproof plate winch mechanism is used for unwinding the waterproof plate, the hot melt welding mechanical arm is used for fixing the waterproof plate on the surface of the initial support of the tunnel, and the grouting assembly is used for injecting filling slurry between the waterproof plate and the initial support; the application realizes waterproof and drainage integrated construction, so that the waterproof layer and the drainage groove are constructed synchronously and seamlessly overlapped, and the leakage hidden danger of the joint caused by the separation of traditional processes is completely eliminated.

An anion exchange membrane having an anion exchange resin layer (3) reinforced by a base sheet (5), characterized in that the anion exchange resin layer (3) contains an anion exchange resin having a pyridinium group obtained by protonating a pyridyl group as an anion exchange group and a vinyl chloride resin as a thickening agent, and the base sheet (5) is a polyethylene woven fabric.

The application provides a photovoltaic module connecting and mounting structure, which comprises at least two adjacent photovoltaic modules, each of which comprises photovoltaic module glass, a corrugated back plate and a frame, the photovoltaic module glass and the corrugated back plate are bonded by structural adhesive to form a bearing unit, a prefabricated silicone strip is clamped into the bearing unit in the direction of the long side of two sides, a preset hole is arranged on the frame, a rivet is installed through the preset hole and an angle code, a structural weld is formed by laser welding a stainless steel welding wire at the joint of the frame and the corrugated back plate, a sealant is filled in the gap between the folded edge of the corrugated back plate and the photovoltaic module glass, a penetrating self-drilling screw hook fixing piece is arranged between the frame bending grooves of two adjacent photovoltaic modules, and the penetrating self-drilling screw hook fixing piece is clamped and limited to a lower support piece through a self-tapping screw.

This invention discloses an adhesive for repairing photovoltaic (PV) modules, a preparation method thereof, and a method for repairing PV modules. The adhesive includes: a first adhesive, or a first adhesive and a second adhesive; when both are present, the second adhesive and the first adhesive are stored independently. The first adhesive includes: a glue prepolymer formed by the reaction of multiple raw materials; the multiple raw materials include at least 100 parts of epoxy acrylate resin, 3-5 parts of an organometallic catalyst, and 8-15 parts of a compound containing diisocyanate groups. The second adhesive includes liquid silica gel and fumed silica dispersed in the liquid silica gel; the liquid silica gel includes α,ω-dihydroxypolydimethylsiloxane, methyl silicone oil, a crosslinking agent, a coupling agent, a diluent, and a catalyst. Through the synergistic effect of the components in the first adhesive, this adhesive possesses toughness, high strength, and low water permeability, ensuring the reliability of the adhesive in repairing PV modules.