118results about How to "Extended structural life" patented technology

The invention relates to a method for repairing a pile foundation and a scour pit underwater. The method includes the following steps that (1), a steel plate pile cofferdam is adopted for conducting construction around the local scour pit of a pier needing to be repaired; (2), a concrete cushion layer is laid within the range 2 m away from the pier; (3), the condition that the pier is damaged dueto scouring and corrosion is checked, and the pier is repaired firstly; (4), natural backfill soil is packed in the scour pit; (5), multiple stones are packed in the scour pit; and (6) ordinary Portland cement mortar is laid flatly on a macadam grouting protection layer, an RPC material is packed in the portion at the depth 15% of the remaining depth of the scour pit, an RPC layer is formed untilthe RPC layer is flush with the bottom face of a riverbed, and a soil layer is backfilled in the portion, around the RPC layer, in the scour pit. By the adoption of the method, the effect that the scoured and damaged pier foundation and the scour pit can be repaired, the bearing capacity of the original structure is improved, the service life of the structure can be prolonged by the adoption of the RPC material, and maintenance cost is saved.

The invention relates to a polyvinyl chloride (PVC) pipe reinforced concrete and steel pipe concrete laminated member which belongs to a civil engineering member. A PVC pipe is adopted in an outer layer of the member, a steel pipe is adopted in an inner layer, concrete is filled in the inner steel pipe, reinforced concrete is filled between the outer PVC pipe and the inner steel pipe, end faces of the outer PVC pipe reinforced concrete and the inner steel pipe concrete are level, and geometric centers of sections of the outer PVC pipe and the inner steel pipe are coincide. The outer PVC pipe and the inner steel pipe respectively adopt section forms of circle, square, rectangle, polygon, round end, ellipse and the like. The member has the advantages of common steel pipe concrete laminated members, can improve the bearing capacity and the corrosion resistance while increasing small dead weight, and can be applied to large-diameter pillars in bridge piers and buildings and other related towering structures or pillar members.

The invention belongs to the technical field of concrete reinforcement and relates to a method for repairing a concrete crack, which uses multi-cracking cement-based composite to be covered on the outer surface of the concrete as a repairing layer and is characterized in that firstly, the periphery of the crack on the outer surface of the concrete is polished smooth or an isolating layer is arranged, and then the multi-cracking cement-based composite slurry is poured or a thin layer of slurry is poured first and then a precast slab is covered; and the weight ratio of components of the multi-cracking cement-based composite is that: cement: water: fine aggregate: fly ash: silicon ash: granulated blast furnace slag: metakaolin =1:(0.27-2.2):(0-3):(0-6.9):(0-0.3):(0-0.55):(0-0.4), and fiber of which the volume accounts for 1-3% of the total volume of the composite is also blended. The repairing layer leads the width of the crack to be less than 0.05mm under the action of the external shrinkage stress, can prevent the forming of penetrating cracks and can be widely used for repairing concrete structure cracks of concrete pavement, airport runways, anti-cracking belt of dam and bridge surface plate.

The invention relates to an induction welding method for an aluminum water-cooling base plate and a stainless joint, which mainly comprises the following steps: processing the stainless joint and thewater-cooling base plate by sodium hydroxide and sulfuric acid solution and drying; bending a zinc-aluminum alloy flux-cored welding wire with a melting point of 420-480 DEG C into a circle and placing the zinc-aluminum alloy flux-cored welding wire to the root part of the stainless joint exposing out of the end surface of the water-cooling base plate and the chamfering position of a screw hole ofthe end surface of the water-cooling base plate; connecting an induction coil of the water-cooling base plate with one induction heating power supply and placing the water-cooling base plate into theinduction coil; connecting an induction coil of the stainless joint with the other high frequency induction heating power supply and placing the stainless joint into the induction coil. The temperature in the welding position of the water-cooling base plate rises to 450-480 DEG C and the temperature in the welding position of the stainless joint rises to 500-550 DEG C during welding. The invention more ideally solves the problem of welding two different material components of aluminum and stainless steel; welded brazing filler metal has full and even appearance and completely fills a seam andcan lead the welding position to be sealed permanently; and the stable working state of an IGBT power module is ensured.

The invention discloses a precast concrete sandwich cladding wall panel provided with ribs. The precast concrete sandwich cladding wall panel sequentially comprises an inner vane board, a thermal insulation layer and an outer vane board from inside to outside, wherein the thermal insulation layer is arranged between the inner vane board and the outer vane board, and the inner vane board, the thermal insulation layer and the outer vane board are integrally connected through pulling parts; the inner vane board comprises a flange plate and the ribs arranged on the flange plate, and the ribs are arranged on one side, facing the outer vane board, of the inner vane board. In the embodiment, the inner vane board is designed to be in a ribbed form, by comparison with common precast concrete sandwich cladding wall panels with inner vane boards being rectangular sections, the rigidity, the strength, the thermal insulation efficiency, the durability performance and the fireproof performance of the wallboard are guaranteed, the thickness of the wall panel is reduced, the effective use space of a building is increased, the use amount of concrete is reduced, the self-weight of the wall panel is reduced, the safety and the seismic performance of connected nodes are improved, and the precast concrete sandwich cladding wall panel is applicable to thermal insulation engineering of external walls of the building.

The invention provides a novel vibration reduction road structure and a construction method thereof. The vibration reduction road structure comprises a bituminous mixture pavement layer, prefabricated concrete road plates, a CA mortar layer, a waterproof layer and a roadbed or an underground space and other architectural structures from top to bottom. The construction method comprises the steps of roadbed constructing, waterproof layer laying, CA mortar layer paving, prefabricated concrete road plate assembling and connecting and bituminous mixture pavement layer paving from bottom to top in sequence. The vibration reduction road structure provided by the invention has the advantages that a 'dual vibration reduction' structural type (the first vibration reduction structural type body is the bituminous mixture pavement layer arranged on the surface, and the second vibration reduction structural type body is the CA mortar layer arranged under the road plates) is adopted, the better vibration reduction and isolation performance is displayed, and adjacent important buildings and other structures are protected from being disturbed by road vibration maximally; and in addition, the road structure further has good waterproofness and low-noise performance. By means of the advantages in all aspects, the road service life is remarkably prolonged advantageously.

The invention discloses a construction method for repairing a ground deformation joint. The construction method comprises the steps that the surface layer of concrete is broken and removed; a water stopping wall is built; desilting is conducted, and leaking stoppage is conducted; the joint is filled with swelling water stopping strips, interface treatment is conducted, steel bars are embedded, anupturned beamn steel bar is arranged, a first grouting pipe is pre-buried, a first polyethylene foam plastic board is arranged, an upturned beam form board is arranged, and interface glue is smeared;a cement-based grouting material is grouted, maintenance is conducted, and the mold is removed; a first steel board water stopping belt is arranged, a beam steel bar, a second grouting pipe, box ironand angle iron are additionally installed, and a newly added beam form board is arranged; the cement-based grouting material is grouted, maintenance is conducted, and the mold is removed; an L-shapedsteel board is arranged, and grouting is arranged; a second polyethylene foam plastic board, a second steel board water stopping belt and a third steel board water stopping belt are arranged, non-solidified pitch is grouted, and a cover board is arranged; and a spray drain is arranged. The construction method protects the water stopping facility components so as to reduce corrosion damage to the deformation joint by arranging the multiple water stopping components, arranging the upturned beam and additionally installing the beam reinforcing deformation joint area, the water stopping and draining effects are good, and the quality of the deformation joint is improved.

A split mounting type heat-insulation and waterproof roof structure comprises heat-insulation hollow roof plates, a waterproof roof system and field pavement thereof. Each heat-insulation hollow roof plate consists of a heat-insulation hollow roof plate framework and a heat-insulation hollow roof plate closed air layer, and the waterproof system comprises waterproof roof ridge pressing tile waterproof coiling material surfacing sheets, waterproof coiling material ridge covering sheets and waterproof coiling material seam sealing strips. The field pavement includes that the heat-insulation hollow roof plates are paved on a roof of a leveling layer, after the heat-insulation hollow roof plates are in adhesion connection by the waterproof coiling material seam sealing strips, waterproof coiling materials are fully paved on the surfaces of the plates, seams are reserved on ridge plates of the heat-insulation hollow roof plates, the waterproof coiling material ridge covering sheets are covered at the seams of the waterproof coiling materials on the ridge plates, and then waterproof roof ridge pressing tiles are covered on the waterproof coiling material ridge covering sheets. The split mounting type heat-insulation and waterproof roof structure is a novel environment-friendly and energy-saving integral heat-insulation and waterproof roof structure which is simple and convenient in construction, low in cost, long in service life and good in heat-insulation and waterproof effects.

The invention discloses a heavy-load type durable asphalt composite structure applicable to a 'changing white to black' project. The layered composite structure is arranged on an original pavement layer and comprises an upper surface layer, a second bonding layer, an intermediate layer, a first bonding layer, a lower surface layer and a stress absorption layer in sequence from top to bottom; the stress absorption layer is arranged on the upper surface of the original pavement layer. According to the heavy-load type durable asphalt composite structure, the upper surface layer made of rubber asphalt SMA13, the intermediate layer and the lower surface layer made of high-modulus EME are all capable of bear load well, and excellent track resistance is achieved; meanwhile, compared with a common asphalt mixture, the position of the upper surface layer, the position of the intermediate layer and the position of the lower surface layer are all high in stiffness modulus which is closer to the modulus of a cement concrete pavement, so that the entire deformation coordination capacity is unified, and it is helpful to prolong the entire structural service life of the pavement.

A steel coupling beam and concrete shear wall assembly type connecting structure reserving construction allowance is characterized by consisting of a concrete shear wall, a steel reinforced concrete column embedded in the concrete shear wall, bracket steel beam sections, a steel coupling beam, two end plates and a base plate, wherein unequal-diameter round bolt holes are formed in the two end plates; the two end plates are parallel and level to the surface of the concrete shear wall and extend outwards; a reserved variable-section bracket beam section is welded to the steel reinforced concrete column buried in the shear wall; the end plates are respectively welded to ends of the bracket beam sections and the steel coupling beam; the base plate is inserted between the end plates so that the steel coupling beam is abutted between the bracket beam sections; the end plates are connected with the base plate by high-strength bolts through the oblique 45-degree oval bolt holes in two opposite directions; the base plate is provided with the oval bolt hole along the positive 45-degree direction; the plane view size of the base plate is smaller than the sizes of the end plates; and the end plate which is welded to the steel coupling beam is correspondingly provided with the oval bolt hole along the negative 45-degree direction. By the steel coupling beam and concrete shear wall assembly type connecting structure, changeability of the steel coupling beam is guaranteed, and construction is facilitated.

The invention discloses an LED tube, comprising a tube body, a circuit board arranged in the tube body, a light-emitting diode module arranged on the circuit board, and an electric plug-in assembly arranged at the two ends of the tube body, wherein, the tube body comprises an outer tube body and an inner arc-shaped strip; the outer tube body is an integrated molding tube with a hollow chamber; the backside of the inner arc-shaped strip is fitted with the inner wall of the outer tube body, the right side of the inner arc-shaped strip is provided with at least one group of support positioning ribs composed of two cervical ribs along the length direction; the circuit board is a long strip, the right side of the circuit board is fixed with at least one light-emitting diode modules, and the two sides of the circuit board are clamped through two cervical ribs of the support positioning rib to be fixed on the inner arc-shaped strip. The LED tube has firm assembling structure, is not easy to heat to deform, can form the wholly light emitting of the tube body as the traditional fluorescent tube, and has more outstanding illumination effect.

The invention relates to a control method for a butterfly power generation two-axis tracking structure based on a polar axis coordinate system and belongs to the field of solar power generation. The control method for the butterfly power generation two-axis tracking structure based on the polar axis coordinate system is characterized by including the steps of (1), setting initial values; (2), computing n and delta; (3), computing omega sr, omega ss, tss and tsr; (4), computing tz, judging whether tz> / =tsr or not, executing a step (5) if yes, and returning to the step (4) if not; (5), returning to the step (5) if it is cloudy, and executing a step (6) if it is not cloudy; (6), stopping the structure if a limit switch is touched, and executing a step (7) if the limit switch is not touched; (7), computing gamma s, adjusting alpha s and the gamma s, and executing a step (8); (8), comparing R2, R2', R2'' and R2''', judging whether R2= R2'= R2''= R2''' is true or not, if yes, keeping the alpha s and the gamma s and executing a step (13), and executing a step (9) if not; (9), judging whether R2 / = R2' / = R2'' / = R2''' is true or not, if yes, adjusting the alpha s and the gamma s sequentially and executing the step (13), and executing a step (10) if not; (10), judging whether R2= R2' / = R2''= R2''' is true or not, if yes, adjusting the alpha s and executing the step (13), and executing a step (11) if not; (11), judging whether R2= R2'' / = R2'= R2''' is true or not, if yes, adjusting the gamma s according to the S and executing the step (13), and executing a step (12) if not; (12), seeking Rmin, adjusting the alpha s and the gamma s sequentially and executing the step (13); (13) judging whether delta t is terminated or not, executing a step (14) if yes, and returning to the step (13) if not; (14), judging whether tz> / =tss or not, stopping the structure if yes, and executing the step (5) if not.

The invention provides a corrosion-resistant fireproof adhesive for a light steel structure, comprising the following ingredients in parts by weight: 100 parts of melamine formaldehyde resin, 10-20 parts of an anti-ultraviolet agent, 20 parts of a durable agent, 5-15 parts of a flame retardant, 5-10 parts of a toughening agent and 5-20 parts of phosphoric acid. The product provided by the invention is scientific in raw material ratio, simple in process and stable in product quality. The product provided by the invention has relatively high viscosity and can form a dense coating on the surface of light steel, and the coating can resist the high temperature of 400 DEG C, is resistant to acid and alkali and is resistant to corrosion, so that the service life of the light steel structure is prolonged.

The socket-type pipe interface with an anchoring structure of the present invention relates to a socket-type pipe interface with an anchoring structure for connecting ductile iron pipes. The purpose is to provide a socket-type pipeline interface that can improve anchoring reliability, extend structural life, reduce pipeline maintenance costs, facilitate optimization simulation of the interface structure, and increase pipeline transportation capacity. The invention includes a socket, a socket, and a seal between the socket and the socket for sealing and locking a pipeline interface; the socket includes a first annular vertical wall, a tapered wall, a cylindrical inner wall and a second annular vertical wall. The defined annular grooves are connected in turn; the sealing member includes an elastic material ring and a plurality of anchors embedded therein; the anchoring member includes a head and a plurality of meshing teeth; the anchoring member is provided with a center of rotation, and the head is connected to the annular groove The part where the grooves are in contact is an arc support surface; the contact area between the arc support surface and the annular groove is located at the intersection of the first annular vertical wall and the tapered wall.

The invention discloses a temperature-keeping, ventilating and energy-saving dry-method structure of a slope roof and a construction method thereof. The structure comprises a cement mortar leveling layer, a waterproof cushion layer, a temperature-keeping and draining layer, cross roof wood battens and roof tiles, wherein the temperature-keeping and draining layer consists of temperature-keeping plates, supporting wood brackets, longitudinal downstream wood strips and aluminum foil coil materials; the supporting wood brackets are arranged on the waterproof cushion layer; the temperature-keeping plates are fully paved on the waterproof cushion layer; the temperature-keeping plates are clamped between the supporting wood brackets; the longitudinal downstream wood strips are pressed on the temperature-keeping plates; the aluminum foil coil materials are paved on the longitudinal downstream wood strips and are fixedly connected with the longitudinal downstream wood strips through nails; the aluminum foil coil materials, the longitudinal downstream wood strips and the temperature-keeping plates enclose to form a longitudinal airtight air layer. The structure has the best advantages of very good heat-insulating ability and good temperature-keeping and energy-saving property, the heat conductivity of the roof can be effectively adjusted, and the energy-saving effect of a house can be greatly improved.

The invention provides a control method of a polar-axis-based photovoltaic power generation double-axis tracking structure, and belongs to the technical field of solar power generation. The invention is characterized in that the control method of the polar-axis-based photovoltaic power generation double-axis tracking structure comprises (1) setting an initial value, (2) calculating n and delta, (3) calculating w<sr>, w<ss>, t<ss>, t<sr> and [delta]B, (4) calculating t<z>, if t<z>>=t<sr>, a step (5) is executed, otherwise the step (4) is returned to, (5) if weather is cloudy, the step (5) is returned to, otherwise a step (6) is executed, (6) if a limit switch is touched, the structure is stop, otherwise a step (7) is executed, (7) calculating [gamma]<s>, [alpha]<s> and [gamma]<s> are adjusted, and a step (8) is executed, (8) R<2>, R<2>', R<2>'' and R<2>''' are compared, if R<2>= R<2>'= R<2>''=R<2>''', the [alpha]<s> and the [gamma]<s> are kept, and a step (13) is executed, otherwise a step (9) is executed, (9) if the R<2> is not equal to the R<2>', the R<2>' is not equal to the R<2>'', and the R<2>'' is not equal to the R<2>''', the [alpha]<s> and the [gamma]<s> are successively adjusted, and the step (13) is executed, otherwise the step (10) is executed, (10) if the R<2> is equal to the R<2>', the R<2>' is not equal to the R<2>'', and the R<2>'' is equal to the R<2>''', the [alpha]<s> is adjusted, and the step (13) is executed, otherwise a step (11) is executed, (11) if the R<2> is equal to the R<2>'', the R<2>' is not equal to the R<2>'', and the R<2>' is equal to the R<2>''', the [gamma]<s> is adjusted through combination with S, and the step (13) is executed, otherwise a step (12) is executed, (12) an R<min> is searched, the [alpha]<s> and the [gamma]<s> are successively adjusted, and the step (13) is executed, (13) if [delta] is ended, a step (14) is executed, otherwise the step (13) is returned to, and (14) if t<z>>= t<ss>, the structure is stopped, otherwise the step (5) is executed.

The invention discloses a transmission type hydraulic pump with a crank connecting rod structure. The transmission type hydraulic pump comprises at least one plunger piston which is movably arranged in a containing cavity. The transmission type hydraulic pump is characterized by further comprising a motor, an output shaft of the motor is coaxially connected with a lead screw, the lead screw is in threaded connection with a nut in a sleeved mode, at least one rack is fixedly connected to the nut in the length direction of the lead screw, a machine tool is provided with at least one gear meshed with the rack, the plunger piston is connected to the eccentric position of the gear through a hinged rod, and the hinged rod is hinged to the gear and the plunger piston. The transmission type hydraulic pump with the crank connecting rod structure has the advantages of being simple in structure, low in cost and capable of continuously adjusting flow and pressure.

The invention discloses an LED tube, comprising a tube body, a circuit board arranged in the tube body, a light-emitting diode module arranged on the circuit board, and an electric plug-in assembly arranged at the two ends of the tube body, wherein, the tube body comprises an outer tube body and an inner arc-shaped strip; the outer tube body is an integrated molding tube with a hollow chamber; the backside of the inner arc-shaped strip is fitted with the inner wall of the outer tube body, the right side of the inner arc-shaped strip is provided with at least one group of support positioning ribs composed of two cervical ribs along the length direction; the circuit board is a long strip, the right side of the circuit board is fixed with at least one light-emitting diode modules, and the two sides of the circuit board are clamped through two cervical ribs of the support positioning rib to be fixed on the inner arc-shaped strip. The LED tube has firm assembling structure, is not easy to heat to deform, can form the wholly light emitting of the tube body as the traditional fluorescent tube, and has more outstanding illumination effect.

The invention develops a passive padiator railway metallic sound barrier system with a brand-new notion aimed at the disadvantages existing in a high-speed rail sound barrier system of our country. The passive padiator railway metallic sound barrier system with the brand-new notion is applied to the field of high speed railway, interurban railway, passenger transport line, rail transit and the like, and belongs to the technical field of vibration and noise treatment in the environmental protection field. The passive padiator railway metallic sound barrier system with the brand-new notion comprises a passive padiator type metallic sound barrier unit plate shell, a unit plate sound absorption component, a damping device used for installation and a sound barrier biased steel vertical column, wherein the passive padiator type metallic sound barrier unit plate shell is arranged on the sound barrier biased steel vertical column. According to the passive padiator railway metallic sound barrier system, multiple damping are utilized to dissipate energy, transmission of pulsating loads is effectively weakened, the loads transmitted by the pulsating force to the sound barrier shell and the steel vertical column are reduced, the integral rigidity of a sound absorption material is improved, the occurrence of collapse of a sound absorption system is completely eradicated, the weight of a sound barrier plate body is reduced, the loads are reduced, the low frequency acoustical absorption coefficient is increased, thus the service life of safety operation of the sound barrier system is prolonged, and the examination and maintenance in the operation are improved.

The embodiment of the invention provides an optical fiber ferrule module, an optical fiber plug, an optical fiber adapter and an optical fiber connector, relates to the technical field of communication equipment, and can solve the problem of complex assembly process before and after threading in a construction site. The optical fiber connector comprises an optical fiber plug and an optical fiber adapter. The optical fiber plug comprises a plug shell; the first end of the plug shell is used for being connected with an optical fiber, the second end of the plug shell is used for being connected with an optical fiber adapter in an inserted mode; the outer surface of the side wall, close to the second end, of the plug shell extends in the radial direction of the optical fiber to form a boss, and a blocking piece moving in the radial direction of the optical fiber is arranged on the optical fiber adapter. When the blocking piece moves to the first position, the receding opening is aligned with the boss. When the blocking piece moves to the second position, the receding opening and the boss are staggered. The optical fiber connector provided by the embodiment of the invention can be usedfor optical fiber connection.

The invention discloses a peanut harvester with a pair roller vibration soil crushing apparatus. The peanut harvester comprises a frame, the frame is provided with a gearbox, a left transmission device, a right transmission device and a conveying device, the lower portion of the rear end of the frame is provided with a tail wheel, the upper portion of the frame is provided with a traction frame, a left support and a right support which are fixed at the left side and the right side of the central portion of the frame are arranged below the traction frame, the top portions of the left support and the right support are each provided with an adjustment handle, a carry over pinch roll is rotationally arranged between the left support and the right, a lifter shovel fixed at the bottom of the frame is arranged behind the traction roller, the front end of the frame is provided with a left seedling pulling roller and a right seedling pulling roller which are disposed at the left side and the right side of the lifter shovel and respectively rotate vertically, and the top portions of the left seedling pulling roller and the right seedling pulling roller are respectively provided with a left horizontal sector gear and a right horizontal sector gear; and the conveying device is aslant arranged in a gradually heightening manner from the front to the back, and the gear box is in transmission connection with the conveying device through the left transmission device. The peanut harvester with the pair roller vibration soil crushing apparatus, provided by the invention, is used in a soil sticky region or a rainy season and is reasonable in structure and high in efficiency.

The invention discloses a transmission type double-station punching machine with a crank connecting rod structure. The transmission type double-station punching machine with the crank connecting rod structure comprises a machine tool and two punching stations. The transmission type double-station punching machine with the crank connecting rod structure is characterized in that the machine tool is provided with a motor, an output shaft of the motor is coaxially connected with a lead screw which is in threaded connection with a nut in a sleeved mode, two racks are fixedly connected to the nut in the length direction of the lead screw, and two gears meshed with the two racks respectively are symmetrically arranged on the machine tool with the lead screw as the symmetry axis; the two punching stations are symmetrically arranged on the two sides of the lead screw with the lead screw as the symmetry axis, each punching station is provided with a sliding groove which is internally and movably provided with a plunger chip sliding block, the plunger chip sliding blocks are connected to the eccentric positions of the gears through hinged rods, and the gears and the plunger chip sliding blocks are hinged to the hinged rods. By means of the mode of synchronous punching of the two stations, production efficiency is greatly improved, the gravity center is low, stability is good, no pollution is produced, and the output force is large.

The invention discloses a preparation method for a biological steel reinforcement corrosion inhibitor, and belongs to the technical field of preparation of corrosion inhibitors. The method comprises the following steps: crushing and impregnating fresh flagellates in a citrate buffer solution, performing filtration and drying to obtain a dried product for later use, mixing dunaliella salina powder, zinc oxide and citric acid for reaction, performing filtration to obtain filtrate and filter residues, mixing a flushing fluid and the filtrate, performing concentration to obtain a concentrated solution for later use, mixing and filtering the filter residues, the dried product obtained for later use, gluconic acid and the like after drying, and mixing a product, a mixed solution prepared from the concentrated solution and a calcium chloride solution and the like to obtain the biological steel reinforcement corrosion inhibitor. The preparation method has the beneficial effects that the preparation steps are simple; the steel reinforcement corrosion inhibitor is prepared from the flagellates, and is safe, nontoxic and high in corrosion inhibition capability; after the biological steel reinforcement corrosion inhibitor is used, the steel reinforcement corrosion inhibition effect is good, the using amount is reduced by 15.6 to 18.3 percent, corrosion to steel reinforcement is retarded, and the service life of a steel reinforcement structure is prolonged by 5 to 8 years.

The invention belongs to the field of airplane vibration and noise control and particularly relates to a vibration and noise reduction spring connected with a multi-period structure in series. The structure comprises first springs, second springs and connecting rings. Each first spring and the corresponding second spring are connected through the corresponding connecting ring to form a connectingunit. The multiple connecting units are arranged in series to form periodical arrangement. According to the spring, the characteristic that a gap exists in inherent frequency of the periodic structureis utilized for carrying out vibration and noise reduction, vibration transfer of an excitation source is effectively isolated, and the vibration performance is improved. The spring device has a bearing characteristic, and weight reduction of an airplane structure can be achieved. Due to non-existence of rubber materials, the problem of aging of the materials does not exist, the structure life isprolonged, and the maintenance cost is reduced.

A high-accuracy steel connecting beam and concrete shear wall assembling type single-way bolt connecting system is characterized in that a concrete shear wall, a stele rib column embedded in the concrete shear wall, bracket steel beam sections, a steel connecting beam, two end plates and a cushion plate are included, the two end plates are provided with circular bolt holes with unequal diameters, the end plates are flush with the surface of the concrete shear wall, all the bracket steel beam sections are embedded into the concrete shear wall, the end plates are in an outward-extending mode, the bracket steel beam sections and the steel rib column are welded, the bracket steel beam sections and the end of the steel connecting beam are welded with end plates respectively, the cushion plate is inserted between the end plates, so that the steel connecting beam abuts between the bracket steel beam sections, finally, the end plates and the cushion plate are connected together through the circular bolt holes with unequal diameters via single-way bolts, the outer surfaces of the end plates connected with the bracket steel beam sections are flush with the wall surface of the concrete shear wall, and the circular holes formed in the end plates connected with the bracket steel beam sections are greater than bolt holes in the end plates connected with the steel connecting beam by one level. The replaceable performance of the steel connecting beam is guaranteed, and construction is convenient.

The invention discloses a manual box nailing machine facilitating angle adjustment and belongs to the field of box nailing machines. The manual box nailing machine facilitating angle adjustment comprises a bottom plate. A limiting sliding groove is formed in the top of the bottom plate. A connecting sliding block is connected into the limiting sliding groove in a sliding manner. The top of the connecting sliding block extends to the top of the limiting sliding groove. A fixed connecting block is fixedly connected to the top of the connecting sliding block. By pushing a body of the box nailingmachine, the body of the box nailing machine is moved to the right side of the bottom plate, then an inserting ring is pushed upwards, the body of the box nailing machine is rotated, therefore the machining angle direction of the body of the box nailing machine is changed conveniently, the box nailing machine can change the machining angle of the box nailing machine according to the use requirement of users, the adaptive capacity of the box nailing machine is improved, the application range of the box nailing machine is enlarged, when the position of a paper box is not conducive to machining,the machining position can be changed for machining the paper box, a user can use the machine conveniently, and the production efficiency is improved.

The invention discloses a touch control type electronic knob and a wiring structure thereof, the touch control type electronic knob comprises an operation knob and an induction circuit unit, and the induction circuit unit comprises a plurality of capacitance induction circuits; a hollow accommodating part is arranged in the operating knob; each capacitive sensing circuit comprises a rotation sensing part and a signal transmission part which are connected with each other; the signal conduction parts of the capacitive sensing circuits are located in the same conduction plane, the operation button is located on one side of the conduction plane, one end of the hollow containing part is open and faces the conduction plane, and the rotation sensing parts are bent into the hollow containing parttowards the side where the operation button is located and evenly arranged on the periphery of the hollow containing part. According to the invention, the capacitive sensing of the control signal canbe realized without carrying out entity rotation operation on the knob, so that the operation control of the equipment can be realized according to the change of the sensing capacitance, the structural stability of the product is improved, and the service life of the product is prolonged.

The invention relates to the field of road engineering, in particular to a concrete overlay material and a preparation method and an application thereof. The concrete overlay material is prepared from the following components in parts by weight: crushed stone, epoxy resin, a curing agent, polyethylene glycol and carbon. The concrete overlay material has the advantages that the high-heat energy storage characteristic of a phase change material is utilized, the concrete overlay material can be used as a temperature-adjusting asphalt concrete thin overlay, the functions of inhibiting ice and melting snow are realized, and the influence to the road pavement structure and road pavement safety by ice and snow hazards can be effectively overcome.