3300 results about "Precast concrete" patented technology

An efficient lifting device capable of adapting to the mounting angle of a concrete armor block. The efficient lifting device comprises an automatic unhooking system (2) and a position adjustment system (3) which are arranged on a spreader system (1), wherein the spreader system comprises two main lifting beams (101) which are arranged in parallel, lifting arms (102) being hinged to the outer sides of the main lifting beams, the two opposite lifting arms being connected by means of the automatic unhooking system, and the lifting arms being configured to hold a prefabricated concrete block (4); the automatic unhooking system comprises a fixing frame (204), connecting rods (201) being symmetrically and telescopically provided on two sides of the fixing frame, and the connecting rods being hinged to the lifting arms; and the position adjustment system comprises a second jack (304) which is connected to a lock plate (301) by means of a sliding block (302). The efficient lifting device further comprises a fixing unit (9) detachably arranged on a lifting hook (10), wherein the fixing unit comprises a fixed pulley (901), two fixing cables (7) being wound around the fixed pulley, and both ends of each fixing cable being fixedly arranged on the main lifting beams. The lifting device can greatly improve the safety and efficiency of the lifting of a prefabricated concrete block, and can make an adjustment according to the angle of inclination of a slope, and has high adaptability.

The invention relates to the technical field of image processing, and discloses a precast concrete T-beam bubble detection method and system. The method comprises the following steps: carrying out multiband reflection data acquisition and calibration on the surface of a T-beam, and obtaining optimized data through light intensity compensation and band screening; performing spatial registration and noise reduction processing on the data, and fusing the data into an image; edge detection and image segmentation are carried out, and pore morphological features are extracted; calculating depth data and performing spatial reconstruction to obtain pore distribution data; performing statistical analysis on the distribution data to obtain a defect evaluation result; and finally generating a detection report. According to the method, accurate positioning and quantitative evaluation of bubble defects are realized through multi-source data fusion and deep analysis, a complete early warning and evaluation mechanism is established, and the reliability and practicability of a detection result are improved.

The invention discloses a prefabricated concrete modular building capable of being efficiently constructed. Prefabricated concrete modules are spliced to form an integral building. The prefabricated concrete module is defined by a shear wall, a thin shell wall, a filler wall, a partition wall, a top plate and a bottom plate, the thin shell wall is arranged at the shear wall splicing position of the prefabricated concrete module and spliced with adjacent modules on the same layer to form a cavity, and a structural form of direct connection of large-diameter longitudinal bars and local constraint of stirrups is adopted in the cavity. Concrete is poured in the cavities to form connecting joints, and the modules are connected through the connecting joints of the upper-layer modules and the lower-layer modules and the connecting joints of the modules on the same layer to form an integral structure. The thickness of the shear wall at the splicing position of the adjacent modules on the same layer is effectively reduced and controlled, the use space of a building is remarkably increased, the on-site installation and node connection structure is simple, the construction efficiency can be greatly improved, in addition, the structural integrity is high, the system stress mode is clear, and the construction cost is low. The problem that the applicable height of an existing precast concrete module building is limited at present can be effectively solved, and a brand new solution is brought to the field of high-rise and super high-rise modular buildings.

The invention relates to the related technical field of fabricated building outer walls, and discloses a severe cold area fabricated building outer wall based on a thermoelectric power generation technology, which comprises a fabricated wall body module, a thermoelectric power generation module, a heat collection structure module, a circuit connection module, an energy management module and a data monitoring module, the fabricated wall body module is a solid prefabricated concrete shear wall composed of an inner leaf wall plate, a heat preservation layer and an outer leaf wall plate, the heat collection structure module is fixedly installed on the outer wall of the fabricated wall body module, and the heat collection structure module comprises a heat absorption plate, a glass cover plate and a shell; according to the core component, the nickel-chromium alloy and the constantan alloy which are high in stability are directly welded for power generation, other technologies do not need to be combined, the core component can be directly applied to the building field, and under the condition that the power generation efficiency is guaranteed, the construction requirement of the building field is met as much as possible; and a brand new thought is developed for the energy-saving design of the fabricated building wall.

A U-shaped recycled concrete composite beam, and a design and construction method therefor, the U-shaped recycled concrete composite beam comprising a prefabricated concrete casing (11) and cast-in-place compression-zone concrete (12), wherein the prefabricated concrete casing (11) is a recycled concrete casing, and has a U-shaped appearance; the cast-in-place compression-zone concrete (12) is high strength concrete, and the cast-in-place compression-zone concrete (12) is concrete with a strength grade of C50-C80; the thickness h1 of the bottom of the prefabricated concrete casing (11) is not less than 80 mm, and the widths b1 and b3 of lateral surfaces of the prefabricated concrete casing (11) are both not less than 45 mm; the width b2 of the cast-in-place compression-zone concrete (12) is not less than 100 mm; and a steel bar cage is provided in the U-shaped recycled concrete composite beam to serve as a framework. Compared with the prior art, the fire-resistant characteristic of recycled concrete and the excellent mechanical properties of high-strength concrete are fully exerted, the flexural bearing capacity and ductility of the recycled concrete beam can be effectively improved at room temperature, the bursting phenomenon of a fire-exposed surface is reduced at a high temperature, and the temperature field in the beam is significantly reduced.

The invention relates to the technical field of reinforcing mesh processing, in particular to a rapid reinforcing mesh processing device for precast concrete members, which comprises a longitudinal bar conveying frame for simultaneously conveying a plurality of longitudinal bar bodies, and a transverse bar conveying frame for conveying transverse bar bodies is detachably mounted above the longitudinal bar conveying frame. A welding frame used for welding the transverse bar bodies and the longitudinal bar bodies is arranged between the longitudinal bar conveying frame and the numerical control net pulling mechanism, and bending mechanisms used for bending the transverse bar bodies are further arranged at the two ends of the welding frame. A transverse bar body is conveyed through a synchronous belt and a push plate, the transverse bar body slides to the position above a guide arm through a guide assembly, at the moment, a lower welding block and an upper welding block clamp synchronously, the transverse bar body and a longitudinal bar body are welded, a welded reinforcing mesh is pulled out through a numerical control mesh pulling mechanism, and next-step welding is facilitated; therefore, the welding work of the same transverse bar and the multiple longitudinal bars is completed through one-time welding.

The invention relates to the technical field of bridge construction monitoring, and provides a digital twinborn digital-intelligent construction method and system for paving and erecting all-in-one machines. Under the construction operation working condition that a PK type section steel beam and a concrete prefabricated bridge deck slab are overlapped later, according to obtained construction monitoring sensing information of all the paving and erecting all-in-one machines in the main bridge construction process, the construction monitoring sensing information of all the paving and erecting all-in-one machines is obtained; oPC data is integrated to form logic and physical information and construction environment data information of the laying and erecting all-in-one machine, and modular association simulation driving is used for conducting three-dimensional simulation on main beam construction and associating construction monitoring data information through PLC programming data processing. The working posture and physical information state matching of each simulation model and dynamic construction simulation of the construction environment are completed, digital twin digital-intelligent construction of actual physical data is achieved, digital-intelligent development of bridge construction is improved, and the problem that in the prior art, under the PK type steel beam and prefabricated bridge deck slab post-overlapping asynchronous construction condition, the construction efficiency is greatly improved is solved. And the intelligent safety monitoring technology of the construction equipment and the steel beam structure is immature.

The invention discloses a construction method of a synchronous pouring type precast concrete split cover beam, a component mold of the synchronous pouring type precast concrete split cover beam and a component manufacturing method.The combined component mold is composed of a bottom mold, a side mold, a first side mold and a second side mold, and a baffle is arranged in a pouring area of the component mold; a plurality of components can be synchronously manufactured at a time through the mold, then the multiple components are spliced on site and cast in situ to form the component-piece-type prefabricated concrete cover beam, manufacturing of the large-cantilever prefabricated cover beam under the special working conditions that the construction site is narrow, the distance between supporting stand columns is small, cantilevers on the two sides are large, and the stress requirement is high can be achieved, and due to the fact that the prefabricated concrete cover beam is heavy, manufacturing cost is low. The prefabricated concrete cover beam is simple in structure and high in transportation difficulty, the transportation and hoisting difficulty is reduced by manufacturing the multiple components in a split mode, the manufacturing difficulty of the prefabricated concrete cover beam is reduced, meanwhile, manufacturing of the prefabricated concrete cover beam with the larger size and weight can be achieved, and the requirements for the prefabricated concrete cover beam in different projects are effectively met.

The invention relates to the field of intelligent control of the production process of a concrete prefabricated part, and discloses a temperature and humidity parameter self-adaptive control method in the demolding process of the concrete prefabricated part, and the method comprises the steps: obtaining an electrical fingerprint signal representing the internal hydration state of concrete and an external environment temperature change rate signal through a pre-embedded sensing unit; the current temperature and humidity parameter tolerance domain boundary is dynamically determined through a preset two-dimensional lookup table based on the double-signal coupling relation, and the environment adjusting equipment is controlled to operate according to the current temperature and humidity parameter tolerance domain boundary. The system can adaptively adjust the control boundary according to the actual state of the component, and the control robustness and the resource utilization efficiency are remarkably improved while the quality is guaranteed.

The invention provides a method for evaluating the roughness of a superposed surface of a precast concrete component based on a two-dimensional image. The method comprises the following steps: carrying out image graying processing on the collected two-dimensional image to obtain a gray image of the superposed surface of the precast concrete component; calculating an image gray level co-occurrence matrix under different image gray level conditions; the contrast ratio and the gray scale entropy of the image gray scale co-occurrence matrix under different image gray scale conditions are calculated, and the weights corresponding to the contrast ratio and the gray scale entropy are calculated; and carrying out weighted summation on the contrast ratio and the gray entropy of the gray image of the superposed surface of the concrete prefabricated component under the maximum gray level, and calculating to obtain a roughness index of the superposed surface of the concrete prefabricated component, so as to evaluate the roughness state of the superposed surface of the concrete prefabricated component according to the roughness index. The method has the advantages of realizing quantitative evaluation of the roughness of the superposed surface of the concrete prefabricated component, being convenient to operate and the like.

The invention relates to the technical field of material physical testing, in particular to a computer-aided precast concrete component strength detection method which comprises the following steps: decomposing an actual ultrasonic echo signal of a detection point of a precast concrete component into a plurality of principal components, and determining suspected defect components from the principal components; determining a suspected defect interval in the suspected defect component, and obtaining the defect degree expression of the suspected defect component based on the duration of the suspected defect interval, the position in the suspected defect component and the defect condition; according to the method for detecting the strength of the concrete prefabricated part, the feature value and defect degree expression of each suspected defect component are fused, the defect degree of the detection point is obtained, and compared with an existing mode of simply comparing with a normal ultrasonic signal, the defect degree of the concrete prefabricated part is accurately recognized and obtained through the concrete prefabricated part strength detection method provided by the invention; the strength detection accuracy of the precast concrete component is improved.

According to the caisson wharf and the construction method thereof, a layered structure of a steel slag-rubber particle composite lower layer and a regenerated resin-basalt fiber composite upper layer is adopted for a base, and interface bonding is enhanced in combination with a silane coupling agent; the foundation bed is assembled by precast concrete modules and is poured by nano mortar; the caisson main body is provided with a positioning plate which is inserted into the guide groove, the caisson main body is filled with multi-graded steel slag fragments, and an independent airbag cavity is pre-buried in a bottom plate; the buoyancy control system dynamically adjusts the water injection rate based on multi-sensor data; the ecological permeable pipeline network adopts a diatomite-zeolite coating; the prestressed steel strand towing system is regulated and controlled in real time through the friction damper. The caisson wharf and the construction method thereof have the remarkable advantages in the aspects of structural stability, ecological friendliness, construction efficiency, intelligence and automation, the problems existing in a traditional caisson wharf can be effectively solved, and the requirements of modern port construction are met.

The invention provides a pressure maintaining grouting mechanism of a concrete prefabricated wall grouting sleeve, and relates to the field of concrete prefabricated walls. Comprising a lower precast concrete wall and an upper precast concrete wall; an upper steel bar section and a lower steel bar section are arranged in the upper prefabricated concrete wall and the lower prefabricated concrete wall correspondingly, the grouting sleeve is fixedly connected to the bottom end of the upper steel bar section in a sleeving mode, and the top end of the lower steel bar section extends into the grouting sleeve; the pressure maintaining bin is connected with a side frame, the side frame is detachably mounted on the outer wall of the upper prefabricated concrete wall through a mounting mechanism, one side of the bottom of the pressure maintaining bin fixedly communicates with a discharging pipe, and the bottom end of the discharging pipe is connected with a telescopic pipe; the blocking part is arranged in the discharging pipe, and a gap between the blocking part and the inner wall of the discharging pipe is adjustable; and the dragging mechanism is used for driving the plugging part to move in the discharging pipe. And the mounting mechanism is convenient to disassemble and assemble on the upper precast concrete wall surface, so that the whole body can be repeatedly used.

The present invention relates to the technical field of the curing of precast concrete components, and in particular to an anti-cracking film covering device for a precast concrete component, and a film covering method. The anti-cracking film covering device comprises a film covering frame, wherein one side of the film covering frame is fixedly connected to side film covering modules distributed at the front and back; the top of the film covering frame is further fixedly connected to a horizontally arranged balance module; one side of the film covering frame is further fixedly connected to a synchronous movement module; and one side of the synchronous movement module is further fixedly connected to an obliquely arranged pressing module. In the present invention, by means of reserving a certain length of plastic film, a second hydraulic rod driving a friction plate to move downwards, and the bottom of the friction plate coming into contact with the plastic film, the purpose of fixing the plastic film is achieved; pulling the film covering frame realizes the covering of a precast component with a film by a single person; the arranged side film covering modules ensure that a side face of the precast component is pressed, thereby guaranteeing that the side face of the precast component is tightly covered with a film and ensuring the quality of the precast component; and under the action of a water pump, arranged nozzles can uniformly and stably water a surface of the precast component for curing.

The invention belongs to the technical field of building materials, and particularly relates to a light prefabricated concrete wallboard and a production method thereof. The light prefabricated concrete wallboard is prepared by coating the main component fly ash of the concrete wallboard and cooperating with the combined action of the carbon nanotubes and the basalt fibers, so that the compressive strength of the material is effectively improved, the impact resistance is improved, and meanwhile, good combustion performance is obtained.

The invention discloses a forming process and a forming mold of a precast concrete box-type house. The forming process comprises the following steps: step S1, pouring concrete out of a house bottom plate; s2, a wall plate inner mold and a wall plate outer mold are mounted on the house bottom plate subjected to pouring forming, and a wall plate pouring cavity is formed between the wall plate inner mold and the wall plate outer mold; s3, a top plate mold is in lap joint with the wallboard inner mold, and a top plate pouring groove is formed between the top plate mold and the wallboard outer mold; s4, a temporary supporting rod is arranged at the bottom of the top plate mold; s5, concrete is poured into the wall plate pouring cavities and the top plate pouring grooves, and house wall plates and roof plates are formed; s6, after the house wall plates and the roof plate are poured and formed, the wall plate inner mold, the wall plate outer mold and the temporary supporting rods are removed; the top plate formwork is a non-dismantling formwork, and the top plate formwork is reserved on the roof plate formed through pouring. The production efficiency of the box-type house can be improved.

The utility model relates to the technical field of building structures, in particular to a concrete module and a full-prefabricated concrete modular building structure system, which comprise shear wall leaf plates, partition walls, a top plate, a bottom plate and beam shells, the bottom plate serves as the bottom face of the concrete module, and the top plate serves as the top face of the concrete module. The shear wall leaf plates and the partition walls form the four side faces of the concrete module. The shear wall leaf plates are arranged at the corners of the concrete modules, and the partition wall is arranged between the two shear wall leaf plates. A first cavity used for pouring concrete is formed in the shear wall leaf plate; the height of the shear wall leaf plate is larger than that of the partition wall, the beam shell is arranged on the top of the partition wall, a second cavity used for pouring concrete is formed in the beam shell, and the second cavity is communicated with the first cavity so that the beam shell and the shear wall leaf plate can form a whole after the concrete is poured.

The invention provides a multi-story and high-rise full-prefabricated concrete modular building structure and a processing technology thereof, and relates to the technical field of building structures. The structure comprises module units, vertical connecting units and horizontal connecting units, the multiple module units are sequentially arranged in the horizontal direction to form a module combination layer, and the multiple module combination layers are sequentially arranged in the vertical direction to form a building structure; every two adjacent module units in the same module combination layer are connected through a horizontal connecting unit, and every two module units, located in the vertical direction, in every two adjacent module combination layers are connected through a vertical connecting unit. Module units are systematically prefabricated in an assembly type factory, the overall production quality of the module is ensured, it is ensured that reserved pre-buried point positions are correct, then all the module units are conveyed to a construction site, on-site hoisting and splicing are conducted on the construction site, the wet construction amount of the construction site is effectively reduced, the construction efficiency is improved, and manpower and cost are saved.

The invention discloses strength detection equipment for a special-shaped precast concrete component, which belongs to the technical field of building material detection and structurally comprises a suspension seat, a lifting frame, an L-shaped clamping arm and an edge strength detection rod. The suspension seat is connected to the lower side of a sliding table at the bottom of the portal frame, and L-shaped clamping arms are movably installed on the two sides of the lifting frame respectively. The end part of the clamping and supporting head is fixedly connected with a bearing rod, and the edge strength detection rod is detachably and fixedly mounted at the end part of the bearing rod; at least two cross-shaped strength detection rods are arranged below the suspension seat; the special-shaped concrete prefabricated component strength detection device can perform strength detection on the edge, the upper side of the bottom and the inner side of the side wall of the special-shaped concrete prefabricated component to verify whether irregular defects exist in the special-shaped concrete prefabricated component or not, is wide in detection range and high in comprehensiveness, controls the special-shaped concrete prefabricated component to perform multi-direction large-amplitude oscillation in space on the basis, and improves the detection accuracy. Various irregular vibrations possibly suffered in the construction environment are simulated, and whether the vibration meets the use requirements or not is verified.

The invention discloses a precast concrete component strength detection device and method, and belongs to the technical field of precast concrete component quality detection equipment. The invention discloses a concrete prefabricated part strength detection device and method. The device comprises a conveying mechanism, a bearing mechanism, a detection mechanism, a cleaning assembly and a driving mechanism. According to the technical scheme, by arranging the conveying belt, the multiple detection plates and the motor, a worker can conveniently and rapidly conduct continuous strength detection on batched concrete member samples, when the detected detection plates drive the samples to move to the position below the conveying belt, the detected samples can be automatically poured out under the action of gravity, and the detection efficiency is improved. Manual cleaning by workers is not needed, and the strength detection efficiency of the precast concrete component is effectively improved.

The present invention provides a frost heave strain test device for a concrete lined channel, and relates to the technical field of freeze-thaw cycle test devices, including a frost heave body storage bin, wherein a plurality of temperature sensors are evenly arranged at intervals from bottom to top at the axis of the frost heave body storage bin; a simulated lining, wherein the frost heave body storage bin below the simulated lining is filled with a frost heave soil layer, and an axial displacement monitoring device is used to detect the axial displacement of the simulated lining; by pumping freeze-thaw medium into the medium storage bin, the freeze-thaw medium exchanges heat with the frost heave body storage bin above, thereby causing the frost heave soil layer to undergo frost heave changes. The present invention replaces the traditional precast concrete lining structure with a simulated lining, and the simulated lining can be used repeatedly, and can further simulate concrete of different strength grades, thereby greatly reducing the consumption of raw materials, being fast, efficient, energy-saving and environmentally friendly; and at the same time, the existing scattered structures are integrated, thereby reducing the occupied space.

The present invention provides a precast concrete component, a precast concrete assembly and a splicing method thereof. The precast concrete component comprises a connection end, the connection end comprises a connection end face, a longitudinal groove arranged along the length direction of the connection end face, a connection steel bar accommodated in the longitudinal groove and a supporting steel bar fixedly arranged in the longitudinal groove; the supporting steel bar supports the connection steel bar, and the connection steel bar comprises a first side close to the connection end face; wherein the connection steel bar can move in the longitudinal groove, so as to be arranged in the longitudinal groove in an inclined state or a horizontal state, and when the connection steel bar is arranged in the longitudinal groove in a horizontal state, the first side extends out of the connection end face. The precast concrete component of the present invention has a simple structure and is very convenient to construct.

The invention relates to a sea wave energy dissipation mechanism, a concrete prefabricated structure and a wave wall, in particular to the technical field of damping of the concrete prefabricated structure, by arranging a base, an energy dissipation component and a protective cover, a mounting side and a working side are formed on the two sides of the base correspondingly, and the mounting side is used for being connected with an external concrete prefabricated block; the energy dissipation component comprises an energy dissipation assembly and a connecting plate, the energy dissipation assembly is installed on the working side, the connecting plate is installed at the end, away from the base, of the energy dissipation assembly, the protective cover is installed at the end, away from the energy dissipation assembly, of the connecting plate, the protective cover surrounds the periphery of the connecting plate, the periphery of the energy dissipation assembly and the periphery of the base, and the protective cover is in sliding fit with the base. Under the condition that the sea wave energy dissipation mechanism enters a seawater area, when the protective cover is configured to slide from the working side to the mounting side relative to the base under the action of impact force of sea waves, the impact force can be conducted to the energy dissipation assembly through the connecting plate for energy dissipation, and the function of eliminating the impact force generated by the sea waves is achieved; and the service life of the concrete prefabricated structure is prolonged.

The utility model relates to the field of molds, in particular to a recycled concrete precast pile mold capable of achieving rapid filling. The utility model provides a recycled concrete precast pile mould capable of quickly filling, which can be used for conveniently and quickly reducing or eliminating bubbles and gaps in a concrete precast pile and improving the quality of a finished product of the concrete precast pile. A recycled concrete precast pile mold capable of achieving rapid filling comprises a cement outlet pipe, a sliding rod and the like, and the sliding rod is connected to the upper right portion of a base support. The motor output shaft rotates to drive the rotating shaft to rotate, the rotating shaft slides and rotates in the first sliding rail, the first sliding rail is matched to control the first connecting rod to reciprocate up and down on the fixing frame, the first connecting rod is used for controlling the mold base to shake, and a pile making mold on the mold base generates vibration operation. Bubbles and gaps in the concrete precast pile can be conveniently and quickly reduced or eliminated, and the finished product quality of the concrete precast pile is improved.

An electric vehicle (EV) charging skid including at least one EV charger includes a pre-cast concrete skid base having an aperture formed therethrough; a power cabinet connected to the skid base such that the power cabinet covers the aperture, wherein the power cabinet is configured to receive electricity from an electrical source via the aperture; a panel cabinet connected to the skid base, wherein the panel cabinet is in electrical communication with the power cabinet; a first power converter unit connected to the skid base, wherein the first power converter unit is in electrical communication with the panel cabinet; and an EV charger connected to the skid base separately from the first power converter unit, wherein the EV charger is in electrical communication with the first power converter unit.

The utility model discloses a prefabricated concrete beam-slab connecting node free of a mold and an installation support, which comprises a prefabricated laminated beam and a laminated slab, the prefabricated superposed beam is configured to be an inverted trapezoidal section which gradually extends outwards towards the two sides of the prefabricated superposed beam in the height direction of the prefabricated superposed beam from the bottom of the prefabricated superposed beam to the connecting face, matched with the superposed plate, of the prefabricated superposed beam. Connecting bosses are formed at the two ends of the connecting face, matched with the laminated slab, of the prefabricated laminated beam, and the laminated slab can be erected on the connecting bosses at the two ends correspondingly; the prefabricated composite beam is configured to have the inverted trapezoidal section, so that the connecting bosses are formed at the two ends of the connecting surface, matched with the composite slab, of the prefabricated composite beam, the composite slab can be directly erected on the connecting bosses, and the composite slab is supported through the connecting bosses, so that mounting and dismounting of a temporary mounting support are omitted, construction cost is saved, construction is simple, and construction efficiency is improved. And the efficiency is high.

The invention relates to the technical field of concrete construction, in particular to concrete prefabricated part intelligent maintenance equipment which comprises a bottom frame, a first electric rotating roller, a door-shaped supporting frame and the like. Two pieces of H-shaped steel are symmetrically arranged on the lower side of the bottom frame front and back; the front side of the bottom frame is rotationally connected with a first electric roller; a protection blanket for preventing the concrete prefabricated part from being washed by rainwater is wound on the first electric rotating roller; the left side and the right side of the bottom frame are each provided with a door-shaped supporting frame. According to the device, the first electric rotating roller and the electric take-up roller are controlled to rotate cooperatively, so that a protection blanket slides in a limiting groove through a limiting block, the protection blanket automatically covers the upper portion of a stacked prefabricated part, automatic laying and winding of the protection blanket are achieved, manual operation is not needed, the laying and winding efficiency of the protection blanket is improved, and the production cost is reduced. And it is ensured that covering is completed before raining, and the prefabricated part is prevented from being damaged due to untimely protection.

The utility model relates to the technical field of vibrating devices, and provides a vibrating device for a concrete precast element, which comprises a top plate, brackets are symmetrically fixed on two sides of the top plate, and rollers are mounted at the bottom ends of the brackets; a hollow mounting frame is arranged, an air cylinder is rotationally mounted between the side wall of the mounting frame and the bottom wall of the top plate, two vibrating rollers are symmetrically fixed to the bottom of the mounting frame, and a mounting shaft is rotationally mounted at the axis position of each vibrating roller; the driving assembly is used for driving the mounting shaft to rotate; the cleaning assembly is used for cleaning the vibrating roller; by means of the technical scheme, the problems that in the prior art, a vibrating rod of a vibrating device is vertically arranged and can only conduct effective vibrating operation on the adjacent position, but when vibrating operation is conducted on concrete workpieces with large width and length, the position of the vibrating rod needs to be continuously adjusted in order to guarantee the vibrating effect, and the vibrating effect is affected are solved. The concrete is comprehensively vibrated, the operation is tedious, and the working efficiency is reduced.

The utility model provides a precast concrete vibrating device, and relates to the field of building equipment. Four electric cylinders in two groups are symmetrically mounted at the top of the bottom plate; the top ends of the two sets of electric cylinders are each provided with a guide rail supporting plate. Two screw rods are rotationally mounted at the tops of the two guide rail supporting plates; two motors are further fixed to the top of the guide rail supporting plate located on the left side, and the right ends of main shafts of the two motors are connected with the left ends of the two lead screws correspondingly. A vibrating rod adjusting frame is mounted between the two screw rods; a group of vibrating rod guide rails are welded between the two guide rail supporting plates; and a vibrating rod is mounted on the inner side of the vibrating rod guide rail in a sliding manner. According to the vibrating device, more labor is saved when concrete is vibrated, and the concrete can be uniformly vibrated.

The utility model provides a prefabricated concrete beam dry type connection node, which belongs to the field of prefabricated buildings, and is characterized in that an upper high-strength bolt is arranged above the top surface (within the height of a floor) of a prefabricated concrete beam so as to increase the connection arm of force of the upper high-strength bolt, so that equal-strength node connection with a steel bar in the beam is realized by utilizing a single large-diameter high-strength bolt; the installation convenience is greatly improved; the upper high-strength bolt and the lower high-strength bolt are combined for clamping, so that tensile and compression-resistant bidirectional force transmission is realized (in a normal state, the upper high-strength bolt is tensile, and the lower high-strength bolt is compression-resistant; ), so as to cope with the bending moment change of the precast concrete beam under the action of the reciprocating load.