53 results about "Polytetrafluoroethylene sheet" patented technology

The invention discloses a low-dielectric optical transparent adhesive film and a preparation method thereof, and relates to the field of adhesive films. When the low-dielectric optical transparent adhesive film is prepared, nano silicon dioxide sequentially reacts with 2-(4-chlorosulfonylphenyl) ethyltrimethoxysilane and 2, 2 ', 4, 4'-tetrahydroxybenzophenone, and modified silicon dioxide is prepared; the modified silicon dioxide, 4-vinylpyridine, allyltrimethoxysilane, 2-ethylhexyl acrylate, butyl acrylate, hydroxyethyl acrylate, diallyl phosphate and isophorone diisocyanate are subjected to a reaction, then ferric chloride is added, a polytetrafluoroethylene plate is coated and cured, and an adhesive film matrix is prepared; and carrying out surface treatment on the adhesive film substrate by using dimethoxydimethylsilane to prepare the low-dielectric optical transparent adhesive film. The low-dielectric optical transparent adhesive film prepared by the invention has flame-retardant, durable and waterproof capabilities.

The utility model provides a novel support structure, and relates to the technical field of bridge engineering, the top of a support lower steel plate is fixedly connected with a rubber support, the top of the rubber support is provided with a polyfluortetraethylene plate, and the top of the polyfluortetraethylene plate is fixedly connected with a support upper steel plate. According to the rubber support, under the interaction of all the components of the device, efficient protection treatment of the support structure is achieved, it is ensured that the support structure can still effectively isolate invasion of moisture, dust and harmful substances in the severe environment, therefore, the mechanical property stability of the rubber support is maintained, the service life of the rubber support is remarkably prolonged, and meanwhile the service life of the rubber support is prolonged. According to the protection assembly, the protection effect is guaranteed, meanwhile, balance of gas pressure inside and outside the protection assembly is achieved, the crucial environmental condition is provided for long-term stable operation of the rubber support, and therefore the reliability and durability of the rubber support are guaranteed.

This invention relates to a microwave radiation method for preparing room-temperature phosphorescent polymer films based on polyacrylamide, belonging to the field of organic light-emitting materials. The method involves dissolving acrylamide monomer, ammonium persulfate initiator, and β-diketone ligand in a mixed solvent of water and acetonitrile, placing the solution in a microwave reactor, and polymerizing it under microwave radiation to obtain the polymer. The resulting colloidal solution, dissolved in deionized water, is uniformly coated onto a polytetrafluoroethylene (PTFE) or silicone plate, and dried to obtain the room-temperature phosphorescent polymer film based on polyacrylamide. The prepared polymer film exhibits blue or blue-green fluorescence and a green afterglow. The polymer film containing 4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedione has an afterglow time of up to 7.5 seconds. The raw materials of this invention are readily available, the preparation method is simple, convenient, and rapid, requiring no inert gas protection, the solvent does not require treatment, polymerization can be completed in minutes, and the obtained material is non-toxic, non-polluting, free of heavy metals and halogens, has good water solubility, and has broad application prospects.

The utility model provides a kind of positioning device of polytetrafluoroethylene board. The positioning device of polytetrafluoroethylene board is used to be installed on saw bench, comprising: pressing structure, the saw bench surface is opened with saw groove, the saw bench surface is opened with two before and after distribution guide groove in the left side of the saw groove, the inside sliding connection of the guide groove has connecting piece, the bottom of two the connecting piece is equipped with adjusting structure, the top of two the connecting piece is fixedly connected with movable positioning block, the pressing structure is installed in the surface of movable positioning block, the pressing structure includes guide rail, the guide rail is located in the left side of movable positioning block and guide rail bottom and two connecting piece between fixed connection, the positioning device of polytetrafluoroethylene board provided by the utility model has the advantage that user can quickly complete positioning block position adjustment, and board can be stably fixed simultaneously.

The invention discloses a self-resetting eddy current friction composite damping vibration double-control seismic isolation device and application thereof. The device comprises a top plate, an array thick rubber body is arranged below the top plate, a permanent magnet set is annularly installed along the thick rubber body, and a polyfluortetraethylene plate is embedded in the lower surface of the thick rubber body; the lateral surface of the top plate is provided with a protective cylinder which is internally provided with a transverse reset spring; polytetrafluoroethylene plates are arranged on the inner surfaces of the vertical baffles, two sliding blocks are arranged on the inner surfaces of the vertical baffles, the sliding blocks are connected through vertical reset springs, and the sliding blocks are hinged to the corresponding protective cylinders through connecting rods. A high-transmittance acrylic plate is mounted between every two adjacent baffles; a copper plate is laid on the upper surface of the base plate. Composite damping cooperative energy consumption is achieved through horizontal friction-eddy current damping and vertical friction, the vertical and horizontal three-dimensional shock isolation function is achieved through the array thick rubber body, and cooperative reset is achieved through the horizontal springs and the vertical springs.

The invention discloses a composite solid-state electrolyte, a preparation method thereof and a solid-state lithium metal battery, and the method comprises the following three steps: preparation of bismuth oxyiodate nanoparticles, preparation of lithium lanthanum titanium oxide nanorods and preparation of the composite solid-state electrolyte, the preparation method comprises the following steps: dissolving lithium bis (trifluoromethanesulfonimide) LiTFSI and polyvinylidene fluoride (PVDF) into N, N-dimethylformamide to obtain a first mixed solution, respectively weighing bismuth oxyiodate powder and 0.1 g of lithium lanthanum titanium oxide nanorods, adding the weighed bismuth oxyiodate powder and 0.1 g of lithium lanthanum titanium oxide nanorods into the first mixed solution, carrying out ultrasonic treatment and stirring to obtain a second mixed solution, pouring the second mixed solution into a polytetrafluoroethylene plate, and carrying out ultrasonic treatment to obtain the bismuth oxyiodate / lithium lanthanum titanium oxide composite material. And drying in vacuum to obtain the composite solid electrolyte, wherein the mass fraction of the bismuth oxyiodate powder in the second mixed solution is 5-20%. The invention solves the technical problems of low ionic conductivity and lithium dendrite growth of the solid electrolyte in the prior art.

The application provides a heat insulation door, which comprises a chamber, two mounting plates are fixedly mounted on the top surface of the chamber, a supporting hole is formed in one side of the mounting plate, and a bearing is fixedly sleeved in the supporting hole; and a folding assembly is arranged in the chamber and used for folding the heat insulation plate, a first steel cable is pulled by rotating a driving motor, the heat insulation plate is folded and contracted under the linkage of a first silicon rubber strip and a second silicon rubber strip, the chamber is opened, the heat insulation plate occupies a small space when being opened, the space occupation of the central isolation chamber is greatly reduced, a contraction cavity does not need to be added on the chamber, the heat insulation effect is ensured, the heat insulation plate is a polytetrafluoroethylene plate, has the excellent characteristics of high and low temperature resistance and strong heat insulation capacity, the reflecting layer is an aluminum foil, heat transfer caused by radiation in the chamber is reduced, and heat dissipation is reduced.

The invention discloses a cylindrical cavern energy storage structure lining tank mounting method, and relates to the field of tunnel construction. The installation method of the cylindrical cavern energy storage structure lining tank comprises the following steps that at least two rows of sliding supporting bosses arranged at intervals in the length direction of a cavern are arranged at the bottom of the cavern, and polyfluortetraethylene plates are arranged at the tops of the sliding supporting bosses; a plurality of sliding rails and at least two temporary brackets capable of sliding along the sliding rails are arranged outside the cavern; the lining tank is hung on a temporary bracket to be supported; a pushing mechanism is used for pushing the lining tank to move to the top of each row of sliding supporting bosses along the sliding rails for supporting; and the lining tank is pushed to move to a designed position along each row of sliding supporting bosses. According to the mounting method for the lining tank of the cylindrical cavern energy storage structure, the guide precision of the lining tank during movement can be improved, the situation that the axis of the lining tank deviates too much during long-distance pushing is avoided, and the bottom of the lining tank is prevented from being scratched.

The application discloses a cutting die for expanded polytetrafluoroethylene plate, which comprises a base, a support fixed on the base, a rotating rod penetrating through the support and rotationally connected with the support, the other end of the rotating rod being rotationally connected with the support, a driving mechanism installed on the support and used for driving the rotating rod to rotate intermittently, a through groove arranged at the upper end of the support, a bolt and nut assembly slidably connected in the through groove and capable of being positioned, the bolt and nut assembly being fixedly connected with the upper end of a sliding block, and the rotating rod being sleeved with the sliding block movably connected with the rotating rod. The application can cut the plate at equal intervals without marking the plate by workers, greatly improves the work efficiency, clamps the plate, does not need manual positioning of the plate, increases the stability of the plate, reduces the labor of the workers, and can adjust the position of the cutter to meet the cutting of plates with different lengths and the cutting accuracy.

The utility model discloses a constructional engineering heat distribution pipeline mounting structure with an axial thermal expansion compensation function, and solves the problems that the construction period of a heat distribution pipeline and pedestal mounting structure is long, and the thermal expansion and cold contraction adaptability between a pipeline and a pedestal is poor. The mounting structure comprises a concrete cast-in-place forming foundation, a prefabricated pedestal, a polyfluortetraethylene plate, an elastic restraint strap and a heat distribution pipeline, wherein the prefabricated pedestal is arranged on the concrete cast-in-place forming foundation and is in grouting connection with the concrete cast-in-place forming foundation; the prefabricated pedestal is of a cross-shaped structure, and an arc-shaped through groove consistent with the trend of the heat distribution pipeline is formed in a pedestal body. A polyfluortetraethylene plate is fixedly mounted in the arc-shaped channel; the heat distribution pipeline is arranged on the polyfluortetraethylene plate, an elastic restraint strap is arranged above the heat distribution pipeline, and the two ends of the elastic restraint strap are fixed to the prefabricated pedestal. And the sliding friction between the polytetrafluoroethylene material and the heat distribution pipeline shell or between the polytetrafluoroethylene material and the stainless steel plate avoids the damage to the heat distribution pipeline.

The invention discloses a preparation method of a double-layer composite solid electrolyte membrane, which comprises the following steps: step 1, stirring a polymer matrix, a lithium salt, a solid electrolyte and an organic solvent at 60-90 DEG C for 1-12 hours, and uniformly mixing to prepare a solid electrolyte glue solution A; step 2, adding a polymer matrix, a lithium salt and a side chain type polyion liquid into an organic solvent, and stirring at 60-90 DEG C for 1-12 hours to uniformly mix to obtain a solid electrolyte glue solution B; and 3, uniformly coating a polyfluortetraethylene plate with the solid electrolyte glue solution A, putting the polyfluortetraethylene plate into a drying box, drying at 50-120 DEG C for at least 2 hours, taking out the polyfluortetraethylene plate, forming a diaphragm A on the polyfluortetraethylene plate, uniformly coating the diaphragm A with the solid electrolyte glue solution B, putting the polyfluortetraethylene plate into the drying box, drying at 50-120 DEG C for at least 12 hours, taking out the diaphragm, and peeling off the diaphragm to obtain the double-layer composite solid electrolyte membrane. By adopting the AB double-layer diaphragm structure design, the tensile strength of the whole composite solid electrolyte membrane is enhanced, the interfacial compatibility with a positive electrode is effectively improved, and the interfacial impedance is reduced.

This invention discloses a high-temperature and low-temperature resistant plastic film and its preparation method, relating to the field of polymer materials. In preparing the high-temperature and low-temperature resistant plastic film, bis(4-fluorophenyl)phosphine oxide is reacted sequentially with acrylonitrile, hydroquinone with 4,4'-difluorobenzophenone, 2,4-dihydroxybenzonitrile, N-(2-aminopropyl)maleimide, and furfuryl isocyanate to obtain functionalized polyetheretherketone (PEEK). Glass fibers are then reacted sequentially with N-(3-trimethoxysilylpropyl)pyrrole, 1-allyl-1H-pyrrole with 1-methylpyrrole, N-(furan-2-ylmethyl)ethylamine, and 1,3-propanesulfonic acid lactone to obtain functionalized glass fibers. The functionalized glass fibers and functionalized PEEK are mixed, coated onto a polytetrafluoroethylene (PTFE) plate, and scraped off to obtain the high-temperature and low-temperature resistant plastic film. The high-temperature and low-temperature resistant plastic film prepared by this invention possesses durability, antibacterial properties, self-healing properties, antistatic properties, and flame retardant properties.

This invention discloses a palladium-based catalyst for the semi-hydrogenation of alkynols to enols and its preparation method. Specifically, a metal salt is added to deionized water and ultrasonically dispersed to obtain a uniformly dispersed metal salt solution. A support powder is uniformly spread on a polytetrafluoroethylene plate. The metal salt solution is loaded into a syringe pump and slowly added dropwise onto the support. The solution is allowed to stand and age to obtain a wet support. The wet support is transferred to an oven for calcination. The calcined sample is transferred to a tube furnace for reduction to obtain the palladium-based catalyst. The palladium-based catalyst of this invention can be applied to the selective hydrogenation reaction of alkynols. By controlling the impregnation rate, the active precursor solution is ensured to be absorbed instantaneously and completely, and the enrichment of the active component at the edges is effectively suppressed. High-temperature reduction achieves partial encapsulation of palladium nanoparticles with indium oxide, thereby altering their electronic structure and improving the selectivity for the semi-hydrogenation of alkynols to enols.

The utility model discloses thickness-adjustable polyfluortetraethylene plate cutting equipment, which relates to the technical field of polyfluortetraethylene plate cutting, and comprises a cutting table component and a first adjusting frame group, and adjusting columns are vertically and movably mounted at four opposite angles of the bottom of the cutting table component; the first adjusting frame set is horizontally installed in the middle of the upper portion of the cutting table assembly, and the second adjusting frame sets are horizontally erected on the front side and the rear side of the cutting table assembly correspondingly. According to the thickness-adjustable polyfluortetraethylene plate cutting equipment, through the arrangement of the first adjusting frame set and the structural arrangement of the first adjusting frame set, on one hand, a circular saw can be assisted in adjusting and adapting polyfluortetraethylene plates of different specifications within a certain range, the stability of the polyfluortetraethylene plates during cutting machining is ensured, and meanwhile it can be ensured that in the cutting process of the circular saw, the cutting efficiency of the polyfluortetraethylene plates is improved. And in addition, due to the use of the second adjusting frame set and the limiting plate, side edge limiting is further provided for the cut polyfluortetraethylene plate, and therefore the cutting accuracy is guaranteed.

The utility model relates to the technical field of polytetrafluoroethylene plate, specifically relates to a kind of polytetrafluoroethylene plate of stable assembly, including polytetrafluoroethylene plate body, one side of polytetrafluoroethylene plate body is equipped with lap plate, the bottom end surface four corners of lap plate are equipped with guide post, one side of guide post is equipped with fastening plate, the other side of polytetrafluoroethylene plate body is equipped with the lap joint of lap plate and is equipped with the lap joint groove of lap plate, the bottom of lap joint groove is equipped with the guide groove of the insertion of guide post and fastening plate in polytetrafluoroethylene plate body, multiple guide grooves are equipped with multiple installation grooves in polytetrafluoroethylene plate body, locking rod is slidably arranged in installation groove. The utility model improves the connecting strength of the butt joint of two polytetrafluoroethylene plate bodies, avoids the fracture of the connecting place of polytetrafluoroethylene plate body connected using glue later.

The invention relates to the technical field of polyfluortetraethylene plate processing, in particular to a polyfluortetraethylene plate continuous processing line and process, which comprises an annular guide rail, and further comprises a mold mechanism mounted on the annular guide rail, and a mold feeding mechanism, a net mounting mechanism and a preliminary forming mechanism which are mounted on the outer side of the annular guide rail and are sequentially arranged in the transfer direction of the annular guide rail; foaming liquid sprayed out first can be slightly thickened in the metal net trimming process, the situation that the metal net deviates from the center of the outer ring mold subsequently is reduced, the position of the metal net is limited through the vertical grooves in the inner ring mold rising process, the situation that the metal net deviates is further reduced, and the service life of the metal net is prolonged. Through precise control of the position of the metal net before foaming, the situation that the metal net deviates from the center of the metal net in a subsequent foaming plate is greatly reduced, and it is ensured that the metal net can serve as an effective functional layer to be successfully embedded into a product.

An inhaul cable dynamic and static weather-proof water tightness test device for bridge engineering relates to the field of water tightness tests and comprises an inhaul cable, an upper anchor head, a test cylinder, a lower anchor head, an axial jack and transverse jacks, and the transverse jacks are symmetrically arranged on two sides of the lower end of the inhaul cable; a bearing frame, a sliding groove plate and a composite sliding plate assembly are sequentially installed between the test bottom and the axial jack, the sliding groove plate is fixed to the bearing frame, and a sliding groove is formed in the sliding groove plate. The composite sliding plate assembly comprises polyfluortetraethylene plate sliding blocks which are connected together, a polyfluortetraethylene plate is in sliding fit with a sliding groove of the sliding groove plate, and the sliding blocks are tightly pressed and attached to the piston end of the axial jack. Piston ends of the transverse jacks are connected with two side end surfaces of the composite sliding plate assembly; a lifting protection device is further installed on one side of the lower anchor head. The test device accords with the actual use working condition of the inhaul cable, the angle of the test device can be conveniently adjusted, reverse overturning of the test cylinder is prevented, and different test temperature requirements can be met.

This invention discloses a replaceable metal damper anti-sway point for a suspended steel inner cylinder of a chimney, comprising a metal damper, an outer chimney cylinder, and an inner chimney cylinder; an anti-sway platform component is provided between the outer chimney cylinder and the inner chimney cylinder, and the anti-sway platform component includes a chimney anti-sway platform beam disposed on the inner side of the outer chimney cylinder and anti-sway platform beam side plates fixedly connected to the chimney anti-sway platform beam. This invention relates to the field of chimney technology for thermal power plants. This replaceable metal damper anti-sway point for a suspended steel inner cylinder of a chimney effectively reduces the chimney's seismic response by using a metal damper as the anti-sway point for the steel inner chimney, thereby saving engineering work and reducing engineering costs. Simultaneously, the metal damper is replaceable, easy to maintain, and has low maintenance costs. Furthermore, by providing polytetrafluoroethylene plates at the ends and sides of the metal damper, the friction with the chimney anti-sway platform beam is reduced.

This invention discloses a multi-directional elastic support bridge bearing mechanism and its usage method, relating to the field of bridge bearings. The invention features friction ring plates on the upper and lower bearing plates, with alternating smooth and rough annular surfaces on the friction ring plates. Multiple raised rings are arranged on the sealing rubber ring, making contact with the smooth annular surfaces. When the bearing is under stress, the raised rings of the sealing rubber ring are restricted by the resistance of the rough annular surfaces, resulting in a more balanced lateral deformation increment on both sides of the raised rings under compression, thus preventing excessive wear in localized areas or directions. Simultaneously, the inclusion of a heat-absorbing alloy ring and its cooperation with the sealing rubber ring efficiently dissipates heat generated by friction within the spherical bearing, mitigating frictional wear between the spherical rigid liner and the upper and lower polytetrafluoroethylene plates to some extent.

The invention discloses a self-adaptive deflection displacement device, and relates to the technical field of industrial equipment supporting structures. The device comprises a supporting top plate, a supporting pipe, an upper pressing plate, a guide pipe, a middle pressing plate, a belleville spring, a spherical bottom plate, an outer cylinder, a polyfluortetraethylene plate, a mounting bottom plate, a fixed frame and a stop block. Self-adaption of horizontal displacement and deflection displacement is achieved through a sliding pair of the spherical bottom plate and the polyfluortetraethylene plate, vertical elastic compensation is provided through the belleville spring, and it is guaranteed that the displacement range is controllable through the guide pipe and the stop block. The device can effectively compensate the deflection deformation of the support steel beam of the SCR denitration reactor under the action of load and temperature, has the characteristics of compact structure, sensitive response and multi-dimensional self-adaption, and is suitable for a support system under complex working conditions.

The application discloses a method for preparing regularly arranged graphene oxide film through slit-induced self-assembly, and belongs to the technical field of graphene oxide film preparation. The method comprises the following steps: preparing a device for containing graphene oxide solution and forming a slit condition, wherein the device comprises two polytetrafluoroethylene plates and two blocking plates; one of the polytetrafluoroethylene plates is used as a substrate, and the opposite two ends of the polytetrafluoroethylene are blocked by the two blocking plates, so that a region for containing graphene oxide solution is formed in the middle of the substrate; graphene oxide solution is contained in the middle of the substrate, then another polytetrafluoroethylene plate is placed on the top of the blocking plate, a slit condition is formed between the two polytetrafluoroethylene plates, and a regularly arranged graphene oxide film is obtained through drying. The method effectively enables graphene oxide to spontaneously arrange in a regular layer during the drying process, and greatly improves the heat transfer efficiency of the graphene oxide film.

The invention discloses a three-way limiting type sound barrier vibration isolation support, and belongs to the technical field of building vibration reduction and isolation. The support comprises a vibration isolation rubber support upper connecting plate, a vibration isolation rubber support lower connecting plate and a vibration isolation rubber support body formed by overlapping and vulcanizing a plurality of layers of steel plates and rubber. The innovation lies in that a horizontal limiting mechanism is arranged between the upper connecting plate and the lower connecting plate, the mechanism is composed of an inner anti-shearing frame and an outer anti-shearing frame, a friction pair is formed by a polytetrafluoroethylene plate and a stainless steel plate on the mechanism, and horizontal limiting and sound bridge blocking are achieved; the horizontal limiting mechanism is further provided with a vertical limiting mechanism composed of a limiting guide groove and an anti-shearing bolt. The upper connecting plate is provided with a pre-pressing limiting mechanism enabling the support body to be in a pre-compression state. Horizontal and vertical limiting functions are integrated, horizontal vibration and vertical vibration are effectively isolated, meanwhile, a noise transmission path is cut off, and the comfort and safety of building structures such as a subway upper cover are remarkably improved.

The utility model discloses a novel damping spherical crown type support which comprises a support unit and a dustproof unit, the support unit comprises an upper support and a lower support, a connecting seat is fixed to the top of the lower support, guide rods are fixed to the four corners of the bottom of the upper support, guide cylinders are fixed to the four corners of the top of the lower support, and the guide rods are matched with the corresponding guide cylinders in a sliding mode. The damping device comprises a rubber damping plate fixed in a connecting seat, the top of the rubber damping plate is an arc-shaped surface, and a spherical polyfluortetraethylene plate is placed in the arc-shaped surface of the rubber damping plate. When an upper support is installed on a lower support, the upper support extrudes a piston rod, the piston rod is extruded to drive a piston to move downwards, air in a first round hole is extruded into an annular cavity, air in the annular cavity is increased to extrude an annular rubber sheet, the annular rubber sheet is extruded to expand into an annular plate, and the sealing performance between the annular plate and a disc is improved; dust is prevented from falling among the rubber damping plate, the spherical polytetrafluoroethylene plate and the spherical crown lining plate, and the service life is prolonged.

The invention provides a dynamic rolling compensation sintering method for preparing an expanded polytetrafluoroethylene plate, which comprises the following steps: coating a biaxially oriented polytetrafluoroethylene film on a steel roller from an unreeling machine, and controlling the rotating speed of the steel roller and the advancing speed of the film on the unreeling machine, so that the expanded polytetrafluoroethylene film has a certain tension force; therefore, the steel roller is tightly coated with the thin film, and the thin film layers are tightly attached to each other. After wrapping is finished, the steel roller coated with the polytetrafluoroethylene film is put into a sintering furnace to be sintered, during sintering, the expanded polytetrafluoroethylene film is continuously rolled through a pressure roller above the steel roller, parameters such as the thickness and the surface density of the expanded polytetrafluoroethylene film are corrected in real time, and the expanded polytetrafluoroethylene film is obtained. Therefore, the consistency of the performance indexes of the expanded polytetrafluoroethylene plate is realized. The expanded polytetrafluoroethylene plate or strip produced by the method is simple in process requirement and high in production efficiency.

The utility model relates to the field of basin-type supports, and discloses a road large-tonnage basin-type support which comprises a basin-type support body and a padding height adjusting mechanism, the basin-type support body comprises a lower support plate, a bottom basin, a lower rubber plate, a middle steel plate, an upper rubber plate, an upper support plate, a stainless steel plate and a polyfluortetraethylene plate, the bottom basin is fixedly installed at the top of the lower support plate, and the padding height adjusting mechanism is installed on the bottom basin. The lower rubber plate is fixedly installed on the inner wall of the bottom of the bottom basin, the middle steel plate is arranged on the top of the lower rubber plate, and the upper rubber plate is arranged on the top of the middle steel plate. Compared with the prior art, the basin-type support has the following advantages and effects that the overall height of the basin-type support can be conveniently adjusted, the requirements for the overall height of the basin-type support in different construction scenes are met, the application range and the use effect are improved, and the basin-type support has the effects of being good in shock resistance, relatively large in horizontal displacement and flexible in rotation; the bearing strength on a highway bridge is improved, and the service life of the whole basin type support is prolonged.

The invention relates to the technical field of polytetrafluoroethylene plate manufacturing, in particular to a high-strength polytetrafluoroethylene plate and a preparation method thereof, and the high-strength polytetrafluoroethylene plate comprises the following components in parts by weight: 75-100 parts of polytetrafluoroethylene suspension fine powder; 10 to 25 parts of glass fiber; 5 to 15 parts of carbon fiber; 5 to 15 parts of graphite; 5-10 parts of molybdenum disulfide; and 3-10 parts of modified ceramic particles. Strength and rigidity are provided through the glass fibers; the carbon fibers have higher specific strength, modulus and creep resistance, and a more effective three-dimensional support network is formed in a polytetrafluoroethylene matrix, so that the tensile strength, compressive strength and bending strength of the polytetrafluoroethylene plate are improved; macroscopic lubrication is provided through a graphite layered structure, molybdenum disulfide forms a lubricating film on a microcosmic interface, the friction coefficient is further reduced on the basis of the low friction coefficient of polytetrafluoroethylene, and the friction process is more stable.

The invention relates to a road construction asphalt paving compactness detection device and method, and relates to the technical field of road construction quality detection.The road construction asphalt paving compactness detection device comprises a nucleon density instrument body, one end of the bottom of the nucleon density instrument body is rotationally connected with a rotating shaft, and the outer circumferential surface of the rotating shaft is fixedly connected with two fixing plates; the ends, away from the rotating shaft, of the two fixing plates are fixedly connected with an isolation plate. By arranging the polytetrafluoroethylene isolation plate capable of being unfolded and folded, the isolation plate can be unfolded between the nucleon densimeter body and the asphalt pavement during detection operation, and by means of the characteristics of low heat conduction coefficient, high temperature resistance, good heat insulation effect and high chemical stability of the polytetrafluoroethylene plate, the nucleon densimeter can be used for detecting the asphalt pavement. Direct contact between the nucleon densimeter body and high-temperature asphalt is effectively isolated, the high-temperature asphalt is prevented from damaging the nucleon densimeter body, the service life of equipment is prolonged, meanwhile, the polyfluortetraethylene plate has the characteristics of smooth surface and no adhesion, and the asphalt is effectively prevented from being easily adhered to the isolation plate.

This utility model discloses a sliding connection structure between a retaining wall and a main structure. The sliding connection structure includes a retaining wall and a main structure. An extruded polystyrene board is provided between the top of the retaining wall and the floor slab of the main structure, and a waterproof sealant is applied to the outside of the extruded polystyrene board to seal the gap between the top of the retaining wall and the floor slab of the main structure. The top side of the retaining wall connects to the frame beam of the main structure, and a polytetrafluoroethylene (PTFE) board is provided between the retaining wall and the frame beam, thereby realizing the sliding connection between the main structure and the retaining wall. Through the structural design of this sliding connection structure, the situation where the stiffness of the overall building structure on the side with the retaining wall is much greater than that on the side without the retaining wall is avoided.

The application provides a ball valve foundation mounting structure and a hydroelectric power generation system. The ball valve foundation mounting structure comprises a valve body, a valve body having a ball valve foot, the ball valve foot being provided with a bolt through hole; a mounting foundation, the mounting foundation being fixed with a ball valve foundation plate, the ball valve foundation plate having a through hole opposite to the bolt through hole; a polytetrafluoroethylene plate, the polytetrafluoroethylene plate being arranged on one side of the ball valve foundation plate facing the ball valve foot, the polytetrafluoroethylene plate having a mounting hole opposite to the through hole, and the ball valve foot being mounted on the polytetrafluoroethylene plate; and a foot screw, one end of the foot screw being embedded in the inside of the mounting foundation, the other end of the foot screw penetrating through the through hole, the bolt through hole and the mounting hole and being screwed with a nut at the end. The application reduces the phenomenon that the relative sliding displacement between the ball valve foot and the ball valve foundation plate gradually decreases when the ball valve is shut down or stopped, and avoids the phenomenon that the mounting foundation is cracked and damaged due to the gradual decrease of the relative sliding displacement.

This application discloses a composite electrolyte membrane for improving the ionic conductivity of solid-state batteries and its preparation method, relating to the field of lithium-ion battery technology. The preparation method of the composite electrolyte membrane includes the following steps: LATP coated with graphite-like carbon nitride and polydopamine-modified 2-methylimidazolium zinc salt are added to tetraethylene glycol dimethyl ether and dispersed evenly; then lithium bis(trifluoromethanesulfonyl)imide and benzoyl peroxide are added and stirred evenly at room temperature; subsequently, polyethylene oxide is added and stirred evenly at room temperature; the mixture is coated onto a polytetrafluoroethylene plate, transferred to a vacuum oven for heating, and hot-pressed to obtain the composite electrolyte membrane. The electrolyte membrane provided by this application has excellent ionic conductivity and mechanical strength.