24results about How to "Improve structural durability" patented technology

The utility model provides a tool-free buckle type hoop device for underground pipeline monitoring, which relates to the technical field of engineering monitoring and comprises an upper hoop, a hoop fixing component is arranged on the lower side of the upper hoop, a spring sleeve is welded to the center of the inner side of a slot, a telescopic spring is mounted on the inner side of the spring sleeve, and the telescopic spring is connected with the hoop fixing component through a bolt. Sleeve holes are formed in four corners of the spring sleeve; according to the hoop fixing assembly, the rack below the upper connecting plate is clamped into the inserting groove of the lower connecting plate along with the upper hoop, the rack can extrude the telescopic toothed plate to be meshed with the telescopic toothed plate, in the process, the telescopic spring is pressed to generate elastic force to push the telescopic toothed plate to be meshed tightly, firm connection is ensured, looseness is prevented, and the service life of the telescopic toothed plate is prolonged. And the two sets of racks are synchronously meshed with the telescopic toothed plate, a double-locking mechanism is formed, the tensile strength is enhanced, it is guaranteed that no displacement exists at the connecting position, and the durability of the whole structure is improved.

The application discloses a composite steel pipe single pile filled with recycled building materials and a construction method thereof, and belongs to the technical field of steel pipe piles. The composite steel pipe single pile comprises a steel pipe pile body, a cavity is arranged in the steel pipe pile body, the cavity is used for filling recycled building materials, a plurality of interface connecting mechanisms are arranged in the cavity, and a sealing mechanism is arranged on the top surface of the steel pipe pile body. By constructing a steel-filling core composite cross-section structure, the cross-section inertia moment and the overall bending stiffness are improved, the pile top displacement and bending deformation can be effectively reduced under the action of horizontal load, the single pile horizontal bearing capacity is improved by optimizing the cross-section stress system under the condition of controlling the steel consumption, and the structural material utilization efficiency is improved. The collaborative working capacity between the steel pipe and the filling body is enhanced through the interface connecting structure, the overall stress performance of the composite structure is improved, the air retention space in the steel pipe is reduced by filling the recycled building materials, the temperature and humidity fluctuations are alleviated, and the internal service environment is improved.

The invention belongs to the technical field of automobile active suspension damping systems, and particularly relates to a mute stiffness valve and a control method thereof. The stiffness valve is switched from an open state to a closed state, and the plunger at least comprises a first stroke section, a second stroke section and a third stroke section; in the first stroke section, first direction current is input into the voice coil motor structure, so that the plunger is in an acceleration state; in the second stroke section, current input to the voice coil motor structure is stopped and / or second-direction current opposite to the first-direction current is input, so that the plunger is in a deceleration state; and in the third stroke section, the current in the first direction is input into the voice coil motor, so that the sealing element between the plunger and the air vent is compressed and seals the air vent. By controlling the current input into the voice coil motor structure, control over the moving direction and speed of the plunger is achieved, on the premise of quick response, the impact force generated when the plunger makes contact with the sealing support is remarkably reduced, and noise generated by impact is restrained.

The utility model provides a vertical take-off and landing aircraft motor damping insulation fixing structure. The vertical take-off and landing aircraft motor damping insulation fixing structure comprises a motor, a transverse damping mechanism, a longitudinal damping mechanism, a propeller fixedly installed on the motor and an insulation plate fixedly connected to the bottom of the motor. The transverse damping mechanism comprises a transverse plate movably connected to the insulating plate, one side of the transverse plate is fixedly connected with two fixing blocks, and the adjacent sides of the two fixing blocks are fixedly connected with a rod body. According to the technical scheme, the motor is arranged, so that the insulating plate and the fixed plate on the motor can vibrate, the gap between the insulating plate and the fixed plate is changed, the damper can be extruded to deform, the movable plate is driven to extrude the spring, double-layer damping buffering is performed on external stress, the motor on the insulating plate and the longitudinal damping fixing between the fixed plate are prevented from bearing overlarge stress, abrasion is reduced, and the service life of the motor is prolonged. The overall structure durability is improved.

The invention belongs to the technical field of elevator anti-falling, and particularly relates to a freight elevator with a car anti-falling brake mechanism, which comprises a freight platform, a safety clamp, a traction rod, a sleeve, a speed limiting index and an auxiliary clamp, the freight platform is arranged at the bottom of a car and used for carrying passengers, and guide rails are arranged on two sides of the freight platform; the two safety tongs are arranged at the bottom of the cargo carrying platform, ascending connecting rod mechanisms for triggering linkage are arranged on the side faces of the safety tongs and used for enabling the safety tongs to grasp the guide rail, the traction rod is arranged between the two safety tongs, the two ends of the traction rod are connected to the ascending connecting rod mechanisms on the safety tongs respectively, and the sleeve is arranged on one side of each ascending connecting rod mechanism. The sleeve is used for limiting the movement range of the ascending connecting rod mechanism, and the sleeve is arranged outside the speed limiting index in a sleeving mode and is in sliding fit with the speed limiting index. Two-stage braking can be achieved, it is ensured that multiple sets of braking units respond quickly and synchronously during triggering, the safety margin is prolonged, reliable parking within a preset distance is achieved, and the safety of personnel and equipment is guaranteed.

The invention provides a photo-curing-based deodorizing sanitary ball as well as a preparation method and application thereof, and the sanitary ball comprises the following components in parts by weight: 35-80 parts of an acrylate prepolymer and a reactive diluent, 5-30 parts of a solid organic active matter, 3-20 parts of an MOF catalytic filler, 2-15 parts of a microencapsulated aromatic and 0.5-8 parts of an auxiliary agent. According to the invention, an acrylate prepolymer system forms a high-strength and high-crosslinking three-dimensional network skeleton through photopolymerization, so that the water washing resistance and the structural durability are remarkably improved, and the problem that a traditional material is easy to disintegrate is solved; the normal-temperature photocuring process is adopted, damage of high temperature to thermosensitive components is avoided, multiple effects of catalysis, neutralization and slow release can be achieved by adding the solid organic active matter, the MOF catalytic filler and the microencapsulation aromatic into the sanitary ball, efficient and lasting deodorization is guaranteed, and meanwhile the service life of the product is prolonged.

This utility model relates to the field of suspension technology and provides a multi-link front air suspension for heavy-duty trucks. It includes an axle, a frame, two shock absorbers, a stabilizer bar, and two air springs. The stabilizer bar has a U-shaped structure, with each end of the stabilizer bar's crossbar connected to an airbag base via a bracket assembly. The airbag base has a Y-shaped structure, including a thrust rod portion and an airbag portion. The airbag portion is positioned above the stabilizer bar, and an air spring is fixed to the top of the airbag portion via an airbag disc. The thrust rod portion has a concave arc-shaped structure and is located on the side closest to the stabilizer bar's suspension rod. The thrust rod portion of each airbag base is connected to a longitudinal thrust rod front bracket via two parallel longitudinal thrust rods. The top and upper sidewall of the longitudinal thrust rod front bracket are fixed to the frame with bolts. This design enables the structural components to work synergistically, achieving coordinated transmission of multi-directional forces, dispersing the load on the suspension system, and reducing anti-roll forces.

The invention provides an elastic body expansion packer self-adaptive to a well diameter and a using method, and belongs to the technical field of packers. Comprising two fixing seats, an inner supporting core, a rubber sleeve, a connecting pipe, a central pipe and an upper connector, two sliding grooves are symmetrically formed in the inner side wall of the lower fixing seat, a lower connector is arranged in the lower fixing seat, an adjusting assembly is arranged between the connecting pipe and the central pipe, buffering assemblies are arranged between the sliding grooves and the lower connector, and the rubber sleeve is arranged in the lower fixing seat. The sliding sleeve is driven to axially move downwards through the adjusting assembly and the rotating center pipe, the distance between the two inner supporting cores is compressed, axial extrusion is applied to the rubber sleeve to promote radial expansion of the rubber sleeve, and the rubber sleeve effectively adapts to the large well diameter within a certain range. The position of the second sliding block is synchronously adjusted through rotation of the buffering assembly and the center pipe so as to increase the buffering stroke of the spring, self-adaptive protection with the larger hole diameter and the stronger buffering is achieved, and the structural durability is improved.

The application discloses a kind of anti-chlorine salt erosion rubber modified asphalt pavement pit slot repair composite process, in view of the interface peeling caused by chlorine salt erosion in traditional repair process, short repair life problem, innovatively proposes the three-stage repair system of "debridement-interface activation-bionic filling": (1) rough interface is formed by using high-pressure cyclone debridement device to remove loose debris;(2) spray anti-chloride bonding layer containing nano-silane coupling agent, the depth of penetration reaches 3-5mm, forms chemical barrier;(3) layered filling rubber modified asphalt mixture, the gradient compaction is implemented in 30-50Hz of adjustable frequency vibrating road roller.The application improves the interface strength by molecular bonding and mechanical interlocking dual action, realizes the dual anchoring of chemical bonding and mechanical engagement effect of repair layer and original pavement, improves the interface bonding strength, prolongs the service life of repair layer, effectively solves the technical problem that pit slot repair layer is easy to debond and fails in chlorine salt environment, and is suitable for the rapid repair of pavement diseases in coastal areas and road sections where deicing agent is used a lot in winter.

The invention discloses a springback type composite sheet and a preparation method thereof, and belongs to the technical field of composite sheets. The sheet comprises an inner layer, a springback layer, a blocking layer and an outer layer which are sequentially arranged in a stacked mode. The base material of the rebound layer is polyester or polyamide, the tensile strength of the rebound layer is limited to be larger than or equal to 150 MPa, the elongation at break of the rebound layer is larger than or equal to 50%, the thickness of the rebound layer is 10-30 microns, meanwhile, the melt flow rate of the polyester under the condition of 275 DEG C / 2.16 kg is controlled to be 5-20 g / 10 min, and / or the melt flow rate of the polyamide under the condition of 235 DEG C / 2.16 kg is controlled to be 5-18 g / 10 min. The springback layer further comprises functional auxiliaries such as maleic anhydride grafted polyethylene and oxazoline grafted polyolefin, and polyester or polyamide is preferably subjected to two-way stretching treatment. The preparation method comprises the following steps: performing corona treatment on each layer of substrate film, sequentially compounding each layer at different temperatures and pressures by adopting a step-by-step dry-method compounding process, and finally performing curing treatment. The method is used for improving the rebound resilience of the composite sheet packaging.

The invention discloses a lap joint device and method for FRP rib winding, and belongs to the technical field of prestressed composite material application, the device comprises a sleeve, a clamping piece and a connector, the inner surface of the sleeve is provided with taper, the outer surface of the sleeve is provided with curvature radius, and the rear end of the sleeve is provided with internal threads; the clamping piece is composed of three piece bodies, the inner diameter is slightly smaller than the diameter of the FRP rib, and the outer surface is provided with taper to form taper difference with the sleeve. One end of the joint is in threaded connection with the sleeve; the lap joint method comprises the steps that the clamping piece wraps the FRP rib to be inserted into the sleeve and anchored, and lap joint is completed through connection of the connector and the lock chain. According to the lapping device and method for FRP rib winding, the structure is simple, anchoring is reliable, construction is convenient and fast, and the lapping device and method are suitable for FRP rib prestress winding engineering.

The utility model discloses a shield body structure and a heading machine, and solves the technical problems that the shield body structure in the prior art is a pure steel structure, and when a shell discarding mode is adopted, the shell cost is high, the durability cannot be guaranteed, the working procedure is complicated, the working environment is poor and the like. The shield body structure comprises an inner metal shield shell and a reinforced concrete shield shell connected outside the inner metal shield shell; the heading machine comprises the shield body structure. Compared with an existing shield body scheme, the combined shield body structure has the advantages of being low in manufacturing cost, high in prefabrication degree, high in structural strength and the like. The shield body structure can be used as a temporary structure in the tunneling period to support and protect internal components and can also be used as a tunnel permanent lining segment after tunneling is completed, concrete does not need to be cast in place in a discarded shield body, the working procedure is simple, the shield body structure is of an outer-concrete inner-steel structure, and compared with a traditional method that concrete is cast in place in the shield body, the shield body structure has the advantages that the construction cost is low, and the construction efficiency is high. The structure is more corrosion-resistant and better in durability.

The invention discloses a preparation method and application of a BiOCOOH-A-Fe photocatalyst, and the specific preparation process is as follows: pre-prepared BiOCOOH is taken as a carrier, iron monoatoms are stably anchored on the surface of the BiOCOOH through the axial coordination effect of APTES, the APTES can realize firm loading of the iron monoatoms by the BiOCOOH, so that the prepared composite photocatalyst has better stability and catalytic activity, and the prepared composite photocatalyst has good application prospects. Meanwhile, a-NH2 terminal group which does not participate in coordination in the APTES can obviously enhance the adsorption of NO3 <->, so that the selectivity of nitrogen in the process of photocatalytic reduction of nitrate by the composite catalyst can be improved. The composite photocatalyst has the advantages of wide light response range, high quantum efficiency and the like, nitrate in a water body can be efficiently and rapidly reduced into nitrogen under the illumination condition, and the composite photocatalyst has good stability, can be recycled for multiple times and is an ideal water treatment photocatalyst.

This invention discloses a precast fiber cement board raft foundation pad and its construction method, relating to the field of building construction technology. The pad includes precast fiber cement boards, nuts, lifting rings, and a post-cast concrete strip. Each precast fiber cement board has connecting grooves on all four sides, and grouting holes are provided throughout the board surface. Nuts are pre-embedded below the grouting holes, and the lifting rings are detachably connected to the nuts. Corrugated grooves are continuously provided on the bottom surface of the board. Adjacent precast fiber cement boards are connected into a whole by connecting grooves and post-cast concrete within the post-cast concrete strip. The construction method includes factory prefabrication, on-site layout, hoisting and positioning, grouting the bottom of the boards, and connecting the boards. This invention uses factory-precast panels to replace traditional cast-in-place concrete pads, effectively solving problems such as easy cracking, high moisture content, long construction period, and poor flatness in cast-in-place pads. It has advantages such as short construction period, controllable quality, good durability, and low cost, and is suitable for the construction of raft foundation pads for various buildings.

The utility model provides a kind of automobile windshield strip, it is related to the technical field of automobile connecting accessory, including strip body, strip body includes first sealing portion, connecting portion and second sealing portion, first sealing portion extends and is set along the one end of strip body length direction, first sealing portion is used to be inserted between windshield and automobile front apron;Connecting portion is set along the other end of strip body length direction, and is fixedly connected with first sealing portion, and connecting portion top surface has clamping groove, for with the clamping cooperation of the insertion portion of ventilation cover plate;Second sealing portion is located between first sealing portion and connecting portion, for realizing the sealed connection of windshield bottom end edge and ventilation cover plate edge. Through the insertion type connection of first sealing portion, the detachable clamping structure of connecting portion and the elastic sealing design of second sealing portion, the modular assembly and independent replacement of strip are realized, effectively solve the technical problem that traditional adhesive strip must replace windshield assembly when maintaining.

The invention provides an unmanned aerial vehicle hangar cabin door control method and an unmanned aerial vehicle hangar, and relates to the technical field of engineering equipment, and the method comprises the following steps: obtaining meteorological state information and work process information; based on the weather information and the work process information, determining a waterproof protection level; the first cabin door and the second cabin door are controlled to move in the directions where the cabin doors are located to be closed to form a water flow conduction structure, and the valve plate mechanism is controlled to work based on the waterproof protection level to adjust the water guide section, so that the water flow conduction structure has drainage efficiency related to the waterproof protection level. According to the unmanned aerial vehicle hangar cabin door control method, the waterproof protection level can be determined based on meteorological state information and cabin door opening and closing frequency information, the valve plate mechanism is controlled to adjust the water guide section, the water flow conduction structure can adaptively adjust the drainage efficiency according to the rainfall intensity and the cabin door use frequency, and therefore efficient dredging of a water guide path is achieved; water accumulation at the cabin door joint is avoided, and waterproof performance and cabin door structure durability are improved.

This invention discloses a combined rapid construction method for working bridges, comprising the following steps: S1: Designing the load and dimensions of the working bridge over the river using a three-dimensional river flow coupling model; S2: Simulating and calculating the river water impact force based on the designed working bridge data; S3: Designing a corresponding river water impact force adjustment scheme based on the simulation results of S2, establishing a guide gabion and stilling basin, and forming the final construction parameters; S4: Determining the construction process according to the construction parameters output in S3; S5: Installing the guide gabion downstream of the stilling basin according to the construction process; After the guide gabion is installed, the working bridge is installed and constructed. This invention uses a three-dimensional river flow coupling model for simulation calculation, achieving rapid construction of long-span working bridges with the lowest theoretical design cost and efficient scheme determination time, improving the scour resistance under long-span river conditions, and preventing problems such as water erosion, soil loss, and slope collapse.

The application discloses a sealed and insulated tank for storing liquefied gas and a ship for transporting liquefied gas. The sealed and insulated tank is arranged in a supporting structure, the supporting structure comprises an upper supporting wall; the upper supporting wall and the sealed membrane and the thermal insulation layer are partially interrupted to bound a loading and unloading opening, the loading and unloading opening is used for allowing a liquefied gas loading and unloading pipeline to pass through the loading and unloading opening, and the tank comprises a cover arranged in the loading and unloading opening; the sealed membrane comprises a terminal bent connecting part at the interruption, and the terminal bent connecting part is fixed to the supporting structure through an upper surface or a lower surface of a sealed membrane connecting part extending in a wall thickness direction. The terminal bent connecting part of the sealed membrane is welded to the upper surface of the sealed membrane connecting part, the effective welding area is greatly increased without increasing the thickness of the connecting part, the welding strength is greatly improved, meanwhile, the thin connecting part significantly reduces the heat bridge effect, reduces the cold leakage amount, and effectively solves the contradiction between the sealing and the thermal insulation at the dome.

The invention provides a flexible screen folding structure and a folding terminal with the same, the flexible screen folding structure comprises a shell and an electronic component, the flexible screen folding structure is loaded in the flexible screen shell, the flexible screen folding structure comprises a flexible screen, and the flexible screen folding structure further comprises a supporting assembly used for bearing the flexible screen, comprising a first rotating part and a second rotating part which are arranged at an interval and fixedly connected with the flexible screen; the flexible bending part is made of a thermosensitive shape memory material, and the flexible bending part of the flexible screen is connected to the two sides of the thickness between the first rotating part of the flexible screen and the second rotating part of the flexible screen so as to form an accommodating space for accommodating the bending part of the flexible screen in a folded state; and the temperature field generating assembly is used for receiving an external signal so as to transmit heat to the flexible bending part of the flexible screen or stop transmitting heat to the flexible bending part of the flexible screen. Compared with a traditional rigid mechanical folding structure, the structure has the advantages of being high in durability and free of mechanical abrasion.

The utility model relates to bed mat equipment technical field, concretely relates to a get up bed mat, including backplate chassis, the top of backplate chassis is equipped with backplate upper support, backplate upper support is divided into front part frame and rear part frame, rear part frame is fixed with backplate chassis, the width direction of front part frame is greater than rear part frame, and forms with the partial stagger of rear part frame, the rotation is connected through locking nut and internal hexagonal screw between front part frame and rear part frame, and front part frame can rotate along the rotation point axis, electric push rod is installed on back part chassis, electric push rod is connected with front part frame transmission, the utility model discloses through transmission structure optimization, auxiliary support innovation, the three -dimensional improvement of durable design of buffering, realizes the remarkable promotion on function practicality, use comfort, structural durability, especially adapts the high -frequency use demand of old -age nursing, postoperative rehabilitation etc. scene.