1994 results about "Keel" patented technology

The invention provides a construction method of a prefabricated multi-ribbed cavity floor, and belongs to the technical field of prefabricated multi-ribbed plate construction. The construction method of the prefabricated multi-ribbed cavity floor comprises the steps of full-hall scaffold building, main keel laying, overall leveling and the like. The construction method comprises the steps that S1, full-hall scaffold building is conducted, specifically, when a full-hall scaffold is built, vertical rods on the upper layer and the lower layer are required to be aligned, the vertical rods are uniformly arranged from the two sides of a cast-in-place ribbed beam, the vertical rods are arranged at the intersection positions of floor elastic bidirectional lines, and scaffold boards are laid under the vertical rods; S2, main keels are laid, specifically, when the main keels are installed, the main keels are required to be arranged in order and not to be inclined, and the two vertical rods at the intersection positions must abut against the main keels; and S3, overall leveling is conducted, specifically, after the main keels are laid, overall leveling is conducted according to control lines, and full-hall scaffold formworks are hoisted on the main keels. The cavity formworks are supported by placing the modularized cavity formworks which are machined and formed in a factory-like mode, and accurate and rapid installation of an upper plate of the prefabricated multi-ribbed plate is achieved by installing limiting square pipes.

The invention discloses an assembly type wall surface system and an installation method, and relates to the technical field of wall surface decoration, the assembly type wall surface system comprises a plurality of leveling bases and a plurality of decoration plates which are fixed to a wall surface, keels are connected to the leveling bases, a plurality of sliding groove sets are formed in the keels, and transverse moving plates are arranged on the sliding groove sets in a sliding mode; second locking mechanisms are arranged between the transverse moving plate and the keels, two sliding protruding plates are horizontally arranged on the transverse moving plate in a sliding mode, clamping grooves are formed in the sliding protruding plates, first locking mechanisms are arranged between the sliding protruding plates and the transverse moving plate, a plurality of hanging nails are arranged on the back face of the decorative plate, and the hanging nails are clamped in the clamping grooves, so that the decorative plate is fixed to the at least two keels. By means of the sliding relation between the sliding protruding plates and the transverse moving plates and the sliding relation between the transverse moving plates and the keels, gaps can be adjusted before the decorative plates are installed, the left-right position can be adjusted when the decorative plates are installed, the adjustability of the assembly type wall face system is improved, the adjusting process is simple, and operation is convenient.

The invention discloses a variable cross-section cast-in-place box girder arc-shaped wing plate supporting structure which comprises a disc buckle full supporting frame, an adjusting vertical rod is arranged at the upper end of the disc buckle full supporting frame, a jacking is arranged at the upper end of the adjusting vertical rod, main keels are arranged at the upper end of the jacking, multiple sets of auxiliary keels are arranged at the upper ends of two main keels, and formworks are arranged at the upper ends of the auxiliary keels. A positioning strip is arranged on one side of the upper end of the template; a height adjusting block is arranged on one side of the positioning strip The arc-shaped truss is arranged obliquely above the formwork, and one end of the arc-shaped truss is located at the upper end of the height adjusting block. The method has the advantages that the arc-shaped truss is machined according to the arc-shaped size of the box girder wing plate, the size and radian precision is high, the construction quality is easy to guarantee, the applicability is high, the variable cross-section height is partitioned, the height is adjusted through the height adjusting blocks, the machining model number of the arc-shaped truss is reduced, and the machining cost is reduced. Only several standard parts are adopted for machining, the problem that the sizes of wing plates of the variable cross-section sections are inconsistent can be solved, the positioning strips are adopted for installation and positioning, and the installation deviation of the arc-shaped truss is reduced.

A unitary hermetically sealed device is disclosed for providing self-contained electric propulsion drive power to a motor boat or sailboat, where the entire propulsion system is contained in a separable pressurized hermetic enclosure attached to the underside of the vessel and also acts as a keel of the vessel, and which simplifies production, provides improved safety from high voltages, and prevents drive system maintenance or repair when the vessel is located in the water. The rigid hermetically sealed device functions as a skid-plate to avoid damage to the softer typically fiberglass hull when running the vessel aground or when running up onto or off of the beach or onto or off a trailer.

The utility model discloses a finished steel plate and equipment belt assembly type system installation structure which comprises a keel system, an integrated equipment belt and a hanging piece system. The keel system comprises hanging bars, hanging pieces connected with the hanging bars and main keels installed on the hanging pieces. The integrated equipment belt comprises a metal cover, an air opening shutter installed in the metal cover and a light-transmitting piece. The hanging piece system comprises a fixing piece, a special keel and a closing-up strip, the fixing piece is hung on the main keel, the upper end of the special keel is connected with the fixing piece, the lower end of the special keel is connected with the closing-up strip, a hanging groove is formed in the upper end of the closing-up strip, a hanging piece is installed on the outer side face of the metal cover, and the hanging piece is hung on the hanging groove. The mounting structure has the advantages of being simple to mount, attractive in decoration, detachable to assemble and good in appearance quality.

The invention discloses a BIM (Building Information Modeling)-based suspended ceiling advanced accurate positioning and trepanning construction method, which comprises the following steps of: S1, establishing a construction model of each specialty in a suspended ceiling, performing collision inspection, and adjusting the construction model; s2, establishing a three-dimensional model including suspenders, keels and the like by utilizing BIM software; s3, comprehensive collision inspection is carried out, and the ceiling structure is prevented from conflicting with other professional equipment; s4, generating a construction drawing and organizing field implementation according to comprehensive suspended ceiling deepening typesetting; s5, a trepanning positioning plate is manufactured, and the trepanning positioning plate is used for accurately positioning the trepanning point position of the veneer plate on site; s6, paying off the trepanning point, confirming a central point and implementing accurate trepanning; and S7, after trepanning is completed, point location installation is conducted on facility equipment needing to be installed in advance. Advanced coordination of the keel in the suspended ceiling and various equipment point positions can be achieved, precise positioning of suspended ceiling trepanning is achieved, disassembly and rework are reduced, and the construction precision and efficiency are improved.

The invention relates to the technical field of curtain walls, in particular to a curtain wall aluminum veneer which comprises a plurality of vertical keels and a plurality of transverse keels, each vertical keel is provided with a connecting section, each connecting section is provided with a first through groove, and the two ends of each transverse keel are located in the first through grooves of the two vertical keels respectively. The aluminum veneer bodies are connected to the two transverse keels which are adjacent up and down in a clamping manner; the first limiting and fixing mechanisms are symmetrically arranged on the two sides of the transverse keel and used for limiting and fixing the position between the aluminum veneer and the transverse keel and the position between the vertical keel and the transverse keel after the aluminum veneer body is installed. The curtain wall aluminum veneer is more convenient to install, a large number of bolt installation modes are avoided, the installation process is simplified through the clamping mode, and the installation efficiency is improved.

The utility model discloses a noise reduction assembly applied to a cutting device. In an inner cavity of a cutting platform of the cutting device, a connecting piece is vertically arranged under the position where a cutting assembly carries out cutting action; one end of the connecting piece is connected with the top of the inner cavity, the other end of the connecting piece is pre-buried in the ground, sound waves can be conducted into the ground surface, and the inner cavity is filled with sound absorption cotton; the utility model further discloses a light steel keel cut-off machine, the cutting assembly is arranged on the cutting platform and can move synchronously with the position, to be cut, of the light steel keel, and in the moving process, the light steel keel is cut; the lead screw pair mechanism is arranged on the upper surface of the cutting platform and used for driving the cutting assembly to do reciprocating motion in the moving direction of the light steel keel. The light steel keel structure further comprises the noise reduction assembly, noise generated when the light steel keel is cut off is basically eliminated, the field operation environment is improved, and the harm of the noise is reduced.

A modular keel is arranged along a centerline of a boat hull for displacing a bow wave towards the stern and creating distinct pressure zone situations to draw the keel back into water and reduce pitching. The keel features a base extending along a centerline of the boat hull and two symmetric curved segments. The base tapers toward a vertex on the centerline at a fore transitional area that generates a concentrated high pressure zone to help lift the hull and reduce pitching. The keel includes an aft transitional area for expelling water away from the keel in a laminar flow pattern during forward movement of the boat hull. The keel further includes an intermediate transitional area that creates a low pressure zone to dampen the motion of the hull through waves.

The invention relates to a narrow space thin wall structure and a construction method.The narrow space thin wall structure comprises a filling body used for filling a narrow space and a formwork used for being arranged on the side wall of the inner side of the narrow space, a reinforced concrete layer is arranged between the filling body and the formwork, and a keel layer used for supporting the formwork is arranged on the formwork; a protection bolt penetrating through the filling body, the formwork, the reinforced concrete layer and the keel layer is further arranged and used for providing transverse supporting force for the filling body, the formwork, the reinforced concrete layer and the keel layer. According to the narrow-space thin-wall wall structure and the construction method thereof, the whole cavity is filled with the filling body, the filling body and the formworks on the two sides form a concrete pouring space, the multi-section screw is integrally reinforced, and therefore a formwork system with strength, rigidity and stability is formed, corresponding technical measures are added in the method, and the construction cost is reduced. Therefore, cast-in-place requirements of the bare concrete are met, and appearance quality of the bare concrete is guaranteed.

The invention provides a multi-level force transmission construction method for a large-span beam formwork supporting system, and belongs to the technical field of building construction.The multi-level force transmission construction method comprises the steps that a supporting system space coordinate system is established by obtaining three-dimensional model data of a large-span beam structure; a multi-layer force transmission analysis model is established to divide a supporting system into four force transmission layers including a bottom die layer, a secondary keel layer, a main keel layer and a vertical rod layer, a force transmission path calculation equation set is used for analyzing the load transmission relation between the layers, and a disc buckle type steel pipe supporting frame body is erected to form a multi-layer force transmission network foundation structure. A bottom formwork secondary keel system and a main keel back ridge system are installed to establish a complete bearing system, the bearing capacity and deformation coordination of all force transmission paths are calculated through a force transmission efficiency evaluation equation set, and parameter adjustment and optimization are conducted; the technical problems that the force transmission path of a large-span beam formwork supporting system is not clear, and the load transmission efficiency between layers is low are solved.

The invention discloses a vacuum insulated panel keel heat preservation system adopting anchoring and bonding connection and a construction method thereof, relates to the technical field of wall body external heat preservation, and solves the problem that the heat preservation performance is reduced due to the fact that a heat bridge effect is easily caused by existence of gaps between panels and steel embedded parts in an existing vacuum insulated panel heat preservation wall body. The connecting structure comprises a plain concrete wallboard, a pre-embedded connecting sleeve assembly, a bonding layer, a vacuum insulated panel, an orthogonal keel unit assembly, a wrap angle connecting assembly and a plastering layer, wherein the plain concrete wallboard is connected with the vacuum insulated panel and the orthogonal keel unit assembly through the pre-embedded connecting sleeve assembly and the bonding layer; the vacuum insulated panel is located in a frame formed by mutual array connection of the orthogonal keel unit assemblies; the wrap angle connecting assemblies are connected to the corners of the orthogonal keel unit assemblies. The plastering layer is located on the outer side of the vacuum heat insulation plate and the orthogonal keel unit assembly. The keel units are made of GFRP materials, gaps between plates are isolated, the heat bridge effect is reduced, and the heat preservation performance of the whole wall is effectively improved.

The present invention discloses a curtain wall keel connection structure, comprising a vertical keel, one or both sides of which are connected to a transverse keel via a connection assembly. The transverse keel has a transverse inwardly expanded groove. The connection assembly includes a connector mounted on the vertical keel, each connector having a connecting portion corresponding to each transverse keel, the connecting portion being connected to the transverse keel via an expansion mechanism that expands and engages with the transverse inwardly expanded groove. The connector is fixedly mounted on the vertical keel via a first fastening connection assembly, the first fastening connection assembly including one or more first fastening screws that directly connect and fasten the vertical keel to the connector. The vertical keel has a vertical groove on its front surface, and the connector has an internal connection portion received in the vertical groove. The internal connection portion is fixedly connected to the vertical keel via at least one first fastening screw. The present invention has the advantages of easy installation, high connection strength, high stability and reliability, and good rust resistance.

The utility model discloses a light steel skeleton structure of a hollow earthenware brick curtain wall. The light steel skeleton structure comprises a group of rear anchor plates, adapters connected to the rear anchor plates, a group of vertical steel keels connected with the adapters, supporting angle steel connected to the steel keels, earthenware bricks arranged on the top face of the supporting angle steel or above the supporting angle steel, and a pull rod assembly connected with the earthenware bricks in a penetrating mode. According to the utility model, through the arrangement of the rear anchor plate, a foundation is provided for earthenware tile installation and bearing; a supporting system is formed through the arrangement of the adapting pieces, the steel keels and the supporting angle steel, and the stability of earthenware brick installation is further guaranteed; through the arrangement of the pull rod assembly, the attractive appearance is not damaged in a manner of penetrating through the earthenware bricks; the pull rod assemblies are arranged in sections, so that the bearing force can be shared to the corresponding angle steel; in addition, the earthenware bricks are arranged at intervals and connected with the pull rod assembly in a penetrating mode, batch construction is facilitated, and working efficiency is improved.

The invention discloses a curved surface LED display screen installation structure and method, and the curved surface LED display screen installation structure comprises a keel layer which is of a grid structure composed of a plurality of keel longitude lines and a plurality of keel latitude rings; the curved surface mounting plate layer is fixed on the inner surface of the keel layer; the curved surface mounting plate layer is formed by splicing curved surface mounting plates; the curved-surface mounting plate is provided with a curved surface which is the same as the corresponding position of the curved-surface LED display screen; and the LED lamp panel layer is mounted on the inner surface of the curved surface mounting plate layer. The curved-surface LED display screen mounting structure comprises the LED lamp panel, the integrated curved-surface mounting plate and the integrally-formed keel, the LED lamp panel can be tightly attached to the curved-surface structure through the arc-surface design of the integrated curved-surface mounting plate, the splicing gap and dislocation phenomena are effectively avoided, and therefore the overall display effect is improved.

The invention discloses a cutting device for composite keel forming production, and belongs to the technical field of composite keel production. Comprising a rack, a conveying mechanism is installed on the upper surface of the rack, a dust cover is arranged above the inner wall of the rack, a second motor is connected to the front face of the dust cover through bolts, a rotating rod is fixedly connected to the output end of the second motor, and a circular saw blade is fixedly arranged on the outer side of the rotating rod in a sleeving mode; and the circular saw blade is rotationally connected to the interior of the dustproof cover through a rotating rod. According to the cutting device for composite keel forming production, cutting resistance can be adjusted in a self-adaptive mode, the cooling and dust removing range can be dynamically adapted, keels of multiple specifications are compatible, a circular saw blade moves to be synchronously linked with a spray head during cutting, swing of the spray head within the range of size is achieved through meshing switching of intermittent double racks and gears, chatter of the saw blade is restrained through cooperation with a friction ring, and notch defects are reduced; and the cylinder drives the component to translate to ensure that each mechanism adapts to the keels of multiple specifications, so that the cutting precision and efficiency are improved.

The invention provides a grasshopper-based planing boat parametric modeling method and system, belongs to the technical field of computer aided design, and aims to solve the problems that in the planing boat modeling process, due to the fact that parameters need to be repeatedly determined, the modeling efficiency is low, the modeling design flexibility is insufficient, the interactivity and visual experience are poor, and the modeling cost is high. The method comprises the following steps: constructing a main line segment and carrying out draught control; controlling a hull chord line through curvilinear function mapping; constructing a hull bilge edge line; constructing a boat body keel line; constructing a middle parallel section of the hull; mirroring to generate a complete hull; the system comprises a user interaction interface, a parameter processing module and a model generation module.

The utility model discloses a cable-stayed reinforcing device for an external corner position of a steel-aluminum mold, which comprises pouring templates, a cable-stayed reinforcing device and a steel-aluminum template, wherein the pouring templates are mutually spliced in a right-angle shape; the keels are arranged on the outer side of the pouring formwork, every two keels form a group, and a mounting gap is reserved between every two groups of keels; the section of the mounting block is triangular, the mounting block is buckled on the outer side of the keel, a dovetail block is arranged on the mounting block, and the keel is provided with a groove allowing the dovetail block to be embedded and a dovetail groove connected with the groove and allowing the dovetail block to be embedded in a sliding mode; the screw rod horizontally penetrates through the pair of mounting blocks; and the nuts are in threaded connection with the two ends of the screw rod and tightly press the outer sides of the mounting blocks. According to the external corner reinforcing device, the mounting blocks which are clamped and fixed are arranged, the mounting blocks are rapidly mounted on the outer side of the pouring formwork, opposite pulling and locking of the pair of mounting blocks are achieved through the screws, tensioning and fixing of the external corner position of the pouring formwork are achieved, meanwhile, the reinforcing device is simple in structure, light in component and easy and convenient to disassemble and assemble, and therefore construction convenience is improved, and the construction period is shortened; the working efficiency is improved.

The multi-arc-shaped decorative curtain wall system comprises a supporting keel system and a multi-arc-shaped decorative plate, supporting keels are connected with a main body structure through connecting plate sets, and the supporting keels are filled with heat preservation layers; the multi-arc-shaped decorative plate is formed by horizontally splicing double-arc-shaped plates, U-shaped groove plates are arranged on the inner sides of the double-arc-shaped plates and connected with the inserting plates in an inserted mode, and the double-arc-shaped plates are vertically connected with rhombic cavity inserting cores formed by the stiffening plates, so that multi-direction freedom degree adjustment is achieved. The supporting keel system adopts a hanging connection type inner side plate and a splicing outer side plate, an elastic expansion joint structure is combined, and the problems that a traditional curtain wall is poor in curved surface adaptability and joints are prone to water leakage are solved. And meanwhile, positioning and prefabrication are optimized through a BIM model in construction, and the installation precision is improved. The method has the complex curved surface modeling capacity, high waterproof performance and high construction efficiency, and is suitable for modern special-shaped building curtain wall engineering.

The invention discloses an oil spill treatment ship based on a multifunctional integrated cabin and application of the oil spill treatment ship, and belongs to the technical field of water surface environment protection. The ship comprises a deck, a cabin body below the deck and a navigation bridge installed on the surface of the deck. The top face and the interior of the navigation bridge are fixedly connected with a camera and a water surface oil spill emergency treatment system correspondingly. A mechanical arm base and a mechanical arm movably connected to the mechanical arm base are fixedly connected to the surface of a deck in front of the navigation bridge, a transverse oil suction roller is fixedly connected to the front end of the mechanical arm, and outward-opening arm unfolding plates are fixedly connected to the positions, on the two sides of the oil suction roller, of the prow; the cabin body is divided into a port treatment area and a starboard treatment area by a longitudinal isolation wall extending along the direction of the cabin body keel; an oil spill recovery cabin and a garbage compression cabin are sequentially arranged in the larboard treatment area from a ship bow to a ship stern; a sand excavation monitoring cabin is arranged in the starboard treatment area; and the stern parts of the port treatment area and the starboard treatment area are isolated to form a shared power cabin, so that a cabin body structure with compact space and integrated functions is formed.

The invention discloses an aircraft wing space modeling suspended ceiling installation method which comprises the following steps: constructing a suspended ceiling three-dimensional model, and extracting keel point location data and tenon-and-mortise type stacked suspended ceiling decoration module connecting hole locations from the model; reversely calculating the length of a wall connecting suspender according to the keel point location data and the design elevation of the ceiling finished surface; the suspended ceiling joists of all the suspended ceiling units are cut and assembled on site; a wall body connecting suspender is fixed on the wall body main structure; the suspended ceiling joist is connected with the wall body connecting suspender through the connecting angle plate; the tenon-and-mortise type stacked suspended ceiling decoration modules are installed on the keels drilled with the decoration holes, and the butt joint positions of the adjacent tenon-and-mortise type stacked suspended ceiling decoration modules are connected with the sleeve cores in a sleeved mode. According to the method, digital modeling is used for optimizing the manufacturing and mounting precision of the wall connecting suspenders and the ceiling joists, the reworking phenomenon in construction is reduced, and the construction efficiency and the construction quality are improved.

The application discloses a mounting structure for U-shaped hyperboloid aluminum square tubes and a U-shaped hyperboloid aluminum square tube thereof, and belongs to the technical field of building material mounting. The mounting structure for U-shaped hyperboloid aluminum square tubes comprises aluminum square tubes, first mounting grooves are symmetrically arranged at both ends of the aluminum square tubes, plug-in grooves are symmetrically arranged at both ends of the aluminum square tubes, and a pair of head mounting mechanisms are fixedly arranged in the plug-in grooves. A keel is mounted above the aluminum square tubes, a keel mounting frame is fixedly arranged at the lower end of the keel, and a plurality of limiting and fixing mechanisms are uniformly and fixedly arranged in the keel. The head mounting mechanism is designed, the damaged part can be quickly positioned and replaced during maintenance work, and the overall maintenance time is effectively shortened. In addition, the limiting and fixing mechanism is designed, and it is not necessary to tighten the bolts one by one like the bolt fixing, so that the installation efficiency is improved.

The invention belongs to the technical field of building information model (BIM) and digital manufacturing, and particularly discloses a BIM-based curtain wall metal keel component model data automatic circulation method and system.The method comprises the steps that firstly, a parameterized model of a curtain wall metal keel is established based on BIM software, and geometric dimensions, material attributes and connection node key information are defined; then geometric data and non-geometric data of the curtain wall metal keel are extracted from the parameterized model of the curtain wall metal keel, and the extracted data are converted into a JSON structured format; and finally, based on the kinematic model of the mechanical arm, the extracted geometric data and non-geometric data of the curtain wall metal keel are combined to plan and generate a cutter cutting path for curtain wall metal keel machining and production. According to the scheme provided by the invention, the seamless data link between the BIM model of the curtain wall metal keel and the numerical control machining equipment is established, so that intelligent, high-precision and batch production of the curtain wall metal keel component is realized.

The utility model relates to a cornice aluminum plate curtain wall construction system of an upright quadrangular pyramid grid roof built-in snow melting system. The cornice aluminum plate curtain wall construction system comprises a steel keel and concrete structure connecting system, a steel keel ground jig frame accurate assembling system, a steel keel whole truss hoisting system and a gutter cornice snow melting system. According to the steel keel and concrete structure connecting system, the transverse and vertical keels are reasonably stressed, the overall performance of the wall is good, the firmness degree of the steel keel and the building body is improved, and good technical and economic benefits are achieved; according to the precise assembling system for the steel keel ground jig frame, the auxiliary control assembling precision is improved, errors generated during construction assembling are reduced, the situation that assembling construction of keel units on the ground is inconvenient is avoided, and the assembling construction efficiency is improved; when the steel keel whole truss hoisting system hoists the keel main body, through limiting and fixing arrangement of the clamping pieces, the stability of the keel main body during use is guaranteed, and the construction risk of steel keel whole truss hoisting is reduced.

The invention belongs to the technical field of ocean robots, and discloses a deformable ocean robot capable of cooperatively capturing wind energy and wave energy and a control method. The robot comprises a ship body, a sail module and an energy conversion module, wherein a main power supply and an auxiliary power supply are arranged in the ship body. The sail module is installed above the ship body through a hinge seat and can be unfolded to capture wind energy or folded to be stored. The energy conversion module comprises a deformable keel and a ballast, telescopic movement is achieved through a shear fork arm assembly, and wave energy is used for driving a power generator to generate power. The control method comprises an overwater state and an underwater state. In the overwater state, the sail and the keel module are unfolded to cooperatively capture wind energy and wave energy. The modules are folded in an underwater state to reduce resistance. A deformable structure and dual-energy capture are combined, the robot has the advantages of being high in energy utilization efficiency, high in environmental adaptability, long in endurance time and the like, the problems that a traditional ocean robot is limited in energy supply, insufficient in maneuverability and the like are solved, and the robot is suitable for long-term operation tasks such as ocean monitoring and resource exploration.

The invention relates to the field of wall sound insulation, and provides a sound insulation and noise reduction type furniture wall which comprises an outer frame and a wall body. The outer frame is arranged on the outer side of the wall body; the wall body comprises a keel and two noise reduction plates arranged on the two opposite sides of the keel in the thickness direction. The noise reduction plate comprises a sound absorption plate and a decorative plate which are sequentially arranged from inside to outside; a plurality of first protruding parts are arranged on the sides, facing the keels, of the sound absorption plates, and first cavities are formed in the first protruding parts. First through holes are formed in the sound absorption plate, and any first cavity is provided with the first through hole to be communicated with the first cavity; second convex parts are outwards arranged on the two opposite sides of the keel in the thickness direction, second cavities are formed in the second convex parts, and the outward ends of the second cavities are open; the first protruding parts penetrate into the second protruding parts in a one-to-one correspondence mode. And the keel is a noise reflecting plate. The problem that a furniture wall is poor in sound insulation performance is solved.

The invention provides a novel formwork fastening device and a using method thereof, and belongs to the technical field of building construction. The device comprises a plurality of fastening assemblies which are connected end to end, each fastening assembly comprises a fixing piece, an adjusting piece and an extension piece, the first end of each fixing piece is connected to the first end of the corresponding extension piece, and the second end of each fixing piece is connected to the second end of the corresponding extension piece of another fastening assembly in a sleeving mode; the adjusting piece is arranged in the length direction of the fixing piece and the extension piece, one end is rotationally connected with the fixing piece, and the other end is in threaded connection with the extension piece. By controlling the length of the threaded connection of the adjusting part and the extension part, the length of the fixed part and the extension part after connection can be adjusted, accurate control over the fastening degree is achieved, the operation difficulty is lowered, and the fastening effect on a formwork and a supporting keel is ensured; the structure is simple, mounting and dismounting are easy, turnover use is achieved, the construction efficiency is improved, and the construction cost is reduced.

The application discloses a kind of fabricated unit modular assembly ceiling structure in the modular ceiling technical field, including ceiling board and keel frame, the upper surface of the ceiling board is provided with backboard, further comprising: pre-installation mechanism, the pre-installation mechanism is provided with multiple groups, the pre-installation mechanism includes fitting component, fastening component, adjusting component and fixed component, the both sides of the fitting component are attached in the inner wall of keel groove by fastening component, the fitting component is away from the inner wall of keel groove by adjusting component, the fitting component is fixedly connected with backplate by fixed component, the outside of the fitting component is provided with fixed head, and the fixed head is detachably connected with keel frame.The application is designed by pre-installation mechanism, realizes that ceiling board is placed into keel groove, and loosens to form pre-support by gravity, and worker does not need to continuously hold, supports single assembly, so that the installation efficiency of ceiling board can be effectively improved while not damaging keel frame, and the danger of high-altitude operation can be reduced.

1. The name of this design product: Profile (solid panel inner arc keel). 2. Application of this design product: aluminum profiles for construction and decoration. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the key points of the design: Main view of Design 1. 5. Designate Design 1 as the base design.

The utility model relates to the technical field of grating installation, in particular to a grating installation system. A plurality of grating plates and keel plates forming angles with the grating plates are arranged, fastening assemblies are arranged on the surfaces, facing the keel plates, of the grating plates, the fastening assemblies are fixedly connected with the keel plates, and connecting pieces are detachably installed on the keel plates; the connecting pieces are fixed to the to-be-installed face through the fasteners, then the grating plate is installed on the to-be-installed face, the fastening assemblies, the connecting pieces, the fasteners and other connecting parts are all located on the back face of the grating plate, the appearance is neat and attractive, all the parts are connected in a detachable mode, installation and disassembly are convenient, the installation difficulty is reduced, and the installation efficiency is improved. The method has the advantage of high flexibility.