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51results about How to "Shorten the erection time" patented technology

Multifunctional arch support trolley and erection method for multiple arch supports

The invention belongs to the field of tunnel construction, and discloses a multifunctional arch support trolley. The trolley comprises a trolley body. A main arm frame, a right auxiliary arm frame anda left auxiliary arm frame which the rotation and stretchable functions are arranged on the trolley body. The main arm frame is located between the right auxiliary arm frame and the left auxiliary arm frame. A support clamp for clamping / supporting arch supports is arranged at the end of the main arm frame, and a rotation mechanism is arranged in the support clamp so as to control the arch supports to rotate; the ends of the right auxiliary arm frame and the left auxiliary arm frame are each provided with a worker operation platform. The multifunctional arch support trolley can transport folded steel arch supports into the tunnel stably, and perform direct changes inside the tunnel, meanwhile after the arch supports are transported to a preset place inside the tunnel, the folded steel archsupports can be safely, rapidly and stably lifted to the preset height, and the operation requirement for multi-step long-distance lifting is met.
Owner:SICHUAN LANHAI ENG EQUIP MFG CO LTD

High-mobility large-scale radar vehicle

The invention belongs to the technical field of vehicle-borne radars, and particularly relates to a high-mobility large-scale radar vehicle. The radar vehicle comprises an assembling platform and an electronic equipment cabin, wherein leveling supporting legs are arranged on the lower plate surface of the assembling platform; a fixed antenna and a folded antenna are arranged at the electronic equipment cabin; the folded antenna is driven by a hydraulic driving assembly, so that two position conditions of withdrawing and unfolding are generated along a vertical surface; when the folded antenna is under a withdrawing condition, the antenna plate surface of the folded antenna is vertically arranged, when the folded antenna is under an unfolding condition, the antenna plate surface of the folded antenna is horizontally arranged, and the antenna plate surface of the folded antenna and the antenna plate surface of the fixed antenna are in the same plane; and the radar vehicle also comprises a servo control system and an electric generating system. According to the high-mobility large-scale radar vehicle disclosed by the invention, the situation that the width and the height are not exceeded during the transporting of radar antennas can be guaranteed, functions of quick erecting and quick removing of an antenna array surface can also be realized, and finally, the high mobility of the ground vehicle-borne radar is guaranteed.
Owner:ANHUI SUN CREATE ELECTRONICS

Sectional type modularization rapid assembled and spliced bridge

InactiveCN103422423AImproves buckling stabilityImprove carrying capacityConstructionsOn boardModularity
The invention relates to a sectional type modularization rapid assembled and spliced bridge which comprises springboard bridge sections (1) and standard bridge sections (2). Each springboard bridge section (1) comprises a top board (11), a web (12), a bottom board (13), a pressure bearing interlocking end board (14) and a negative head and positive head connecting lug board (15). Each standard bridge section (2) comprises a top board (21), a web (22), a bottom board (23), a pressure bearing interlocking end board (24) and a negative head and positive head connecting lug board (25). The springboard bridge sections (1) and the standard bridge sections (2) are fixedly connected through the pressure bearing interlocking end boards (14), the negative head and positive head connecting lug boards (15), the pressure bearing interlocking end boards (24) and the negative head and positive head connecting lug boards (25). Every two standard bridge sections (2) are fixedly connected through the pressure bearing interlocking end boards (24) and the negative head and positive head connecting lug boards (25). Every two assembled and spliced bridges are fixedly connected through a transverse connecting arm (3). The sectional type modularization rapid assembled and spliced bridge has the advantages of being convenient to transport, flexible to assemble and splice, capable of being erected rapidly, and particularly suitable for releasing emergencies and disasters. The webs are made of corrugated steel, and the bottom boards are made of laminated composite materials.
Owner:RES INST OF HIGHWAY MINIST OF TRANSPORT +1

10KV bypass cable overhead laying street crossing apparatus

The invention provides a 10KV bypass cable overhead laying street crossing apparatus. The apparatus comprises a first supporting component, a second supporting component, two rod importing stands, a supporting rope, several mobile pulleys, a mobile pulley connection hauling rope and two infrared range finding alarms, wherein the first supporting component and the second supporting component have the same structure. The first supporting component comprises a pedestal, lifting rods and a driver. The two rod importing stands are arranged on upper ends of the two lifting rods. The supporting rope passes through the two rod importing stands and is used for supporting each mobile pulley. Each mobile pulley is used for supporting the bypass cable needing to carry out street crossing to carry out street crossing and can slide left and right replying on the supporting rope under traction of the mobile pulley connection hauling rope. The two infrared range finding alarms are fixedly installed on top ends of the two lifting rods respectively and installation directions are opposite. The structure of the apparatus is simple, the cost is low. The apparatus is portable and is convenient to use. Applicability is good. Repairing efficiency of a power supply department can be increased and working safety is guaranteed.
Owner:CHANGZHOU POWER SUPPLY OF JIANGSU ELECTRIC POWER +3

High-integration anti-unmanned aerial vehicle system and method

The invention discloses a high-integration anti-unmanned aerial vehicle system and method, and belongs to the technical field of anti-unmanned aerial vehicles. According to the invention, the problemof non-uniform coordinate systems among all devices and the problem of shielding among the devices are solved, and the high-integration level vehicle-mounted / fixedly-erected anti-unmanned aerial vehicle system integrating the command and control, radar, photoelectricity, radio detection, interference suppression and navigation decoy equipment as one is designed and comprises a servo rotary table,a radar device, a command and control system device, a radio detection device, a photoelectric device, a navigation decoy device and an interference suppression device. The system and the method havethe advantages of complete functions, small size, simple operation, high reliability and the like.
Owner:中国航天系统科学与工程研究院

Suspension bridge sectional-type catwalk and construction method thereof

The invention discloses a suspension bridge sectional-type catwalk and a construction method thereof, which relate to the field of the construction of suspension bridges. The suspension bridge sectional-type catwalk is used for connecting two main towers respectively disposed at two sides of a main span of a suspension bridge and anchorages disposed at two sides of the suspension bridge. Two sides of each main tower are respectively and fixedly provided with a first anchoring apparatus, wherein the two first anchoring apparatuses of the same main tower are connected with each other by virtue of a counter-pulling apparatus pre-embedded in the main tower, and a main span load bearing rope is arranged between the two opposite first anchoring apparatuses of the two main towers; and each anchorage is provided with a second anchoring apparatus, and a side span load bearing rope is arranged between each second anchoring apparatus and the first anchoring apparatus of the opposite main tower.
Owner:CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD

Inner surface coating tool for bridge and tunnel steel immersed tube

ActiveCN108160380ASolving difficult erection situationsPayloadSpraying apparatusAbrasive blasting machinesSand blastingImmersed tube
The invention discloses an inner surface coating tool for a bridge and tunnel steel immersed tube. The inner surface coating tool comprises an inner beam and two gantry supports for lifting the innerbeam. The inner beam is provided with a sand blasting / spraying robot and a transverse moving mechanism, the sand blasting / spraying robot is movably mounted on the inner beam through the transverse moving mechanism and can transversely move along the inner beam, and the gantry supports are mounted at the two ends of the inner beam. Gantry support bases are arranged at the bottoms of the gantry supports and mounted on rails located on the ground and drive the gantry supports to longitudinally move along the rails through longitudinal transverse mechanisms. According to the inner surface coatingtool, the gantry supports are located on the two opening end faces of the steel immersed tube and can longitudinally move along the ground rails, the two gantry supports can be accurately matched to enable the inner beam to rise and fall, a platform where the robot is located can slide along the inner beam, the platform and the inner beam act coordinately, and thus sand blasting / spraying full-covering operation of the side face / top face of the inner surface of the steel immersed tube can be achieved.
Owner:JIANGSU CUMT DAZHENG SURFACE ENG TECH

Assembled type four-combined-round-steel-pipe concrete inner support structure and manufacturing method

The invention relates to an assembled four-piece combined circular steel pipe concrete inner support structure and a manufacturing method, and belongs to the technical field of support and support in foundation pits of subway stations. The prefabricated four combined circular steel pipe concrete inner support structure includes different types of circular steel pipe concrete straight supports. Including short straight stay and standard straight stay. The straight supports are connected to each other by high-strength bolts. All components are composed of ultra-high-strength concrete filled round steel pipes, and the cross-sections of four round steel pipes are arranged in a square. The present invention satisfies the splicing needs of supports in foundation pits of different lengths by combining different forms of component lengths, and provides an assembled combined circle with high rigidity, reusability and low cost, which can be used as internal supports in the foundation pit or shaft enclosure structure system The inner support structure of concrete filled steel tube can effectively solve the problems of complex construction and high cost of concrete support. The comprehensive benefit is remarkable, and it has important engineering application value and development prospect.
Owner:BEIJING UNIV OF TECH

High-performance electromagnetic shielding tent

The invention discloses a high-performance electromagnetic shielding tent comprising a tent frame and tent cloths. The tent cloths are composed of four layers, namely a shielding outer tent cloth, a shielding inner tent cloth, a silver lining and a ground cloth. The silver lining is directly arranged on the tent frame; the shielding outer tent cloth is arranged on the shielding inner tent cloth; the outermost layer is the coating camouflage rainproof oxford cloth; and nylon sticking buckles arranged on the periphery of the ground cloth are connected to the rainproof oxford cloth. The shielding tent is novel in structure, high in operationality and high in firmness, is easy to install, dismount, and package, can resist sandstorms, is corrosion resistant, is suitable for field communication and command, and is suitable for storing precision electronic equipment.
Owner:NANJING JIHUA 3521 SPECIAL EQUIP

Assembled type three-combined-round-steel-pipe concrete inner support structure and manufacturing method

The invention relates to an assembled three-piece combined circular steel pipe concrete inner support structure and a manufacturing method, which belong to the technical field of support and support in foundation pits of subway stations. The prefabricated three combined circular steel pipe concrete inner support structure includes different types of circular steel pipe concrete straight supports. Including short straight stay and standard straight stay. The straight supports are connected to each other by high-strength bolts. All components are composed of ultra-high-strength concrete filled round steel pipes, and the cross-sections of the three round steel pipes are arranged in an inverted triangle. The present invention satisfies the splicing needs of supports in foundation pits of different lengths through the combination of different forms of component lengths, and provides a high rigidity, reusable, cost-reduced assembly-type combined circle used as internal supports in the foundation pit or shaft enclosure structure system The inner support structure of concrete filled steel tube can effectively solve the problems of complex construction and high cost of concrete support. The comprehensive benefit is remarkable, and it has important engineering application value and development prospect.
Owner:BEIJING UNIV OF TECH

Construction technology for installing directly-buried-section reinforced concrete drainage pipelines

The invention relates to a construction technology for installing directly-buried-section reinforced concrete drainage pipelines. During pipe laying operation, a lifting arm on single pipelines is adopted for hoisting the single pipelines in a storage box into a pipe pit at a time, and therefore, the construction technology shortens the time for erecting a crane compared with the mode of using thecrane, and is labor-saving and high in efficiency compared with the mode of manual pipe laying operation. In addition, the situation that when drainage pipelines are arranged at the two sides of thepipe pit in the length direction of the ditch pipe pit in advance, the drainage pipes may be insufficient or excessive is also avoided, and the construction efficiency is furthermore improved. An earth fill mechanism follows pipeline installing equipment to move and pushes mounds at the two sides of the pipe pit into the pipe pit to position the single pipelines, thus stability of the single pipelines is maintained, and deviation of the directly-buried section is avoided. After all the single pipelines are laid, pipe pit backfilling can be carried out after the airtightness of the single pipelines is judged by means of a closed water test, and then installation of the directly-buried-section reinforced concrete drainage pipelines is completed.
Owner:广州坚磊建设有限公司

Embedded camera based chromaticity measurement device and method

The invention discloses an embedded camera based chromaticity measuring device and method. The device comprises a camera module, a host computer and a display module. The camera module is used for collecting images in real time. The host computer comprises an embedded control module and an auxiliary module. The control module is used for real-time collection of images of a to-be-measured object, extraction of a region of interest and calculation of the chromaticity information of the images. The auxiliary module is used for communicating with the outside and providing a standard light source and a standard power supply. The display module is used for displaying the collected images in real time and displaying the chromaticity information of the images. The host computer is respectively connected with the camera module and the display module. The image acquisition module and the processing module of the invention are integrated in the embedded control module, thereby reducing the imagetransmission time and improving the calculation efficiency. The integrated device is small in volume, convenient to use, simplifies the installation process and reduces the installation time. A chromaticity measurement algorithm is optimized and the chromaticity measurement precision is improved. The device can provide real time measurement of chromaticity information and is high in reliability, long in service life and strong in practicability.
Owner:HUBEI UNIV OF TECH

Fixing method for wedge-shaped steel tenon at movable end of assembled steel support

The invention discloses a fixing method for a wedge-shaped steel tenon at movable end of an assembled steel support. The fixing method comprises the following steps that S1, pre-applied force is applied to the steel support, a steel support steel pipe and the movable end are expanded, the stretching length is measured, and the length of a vacant space between two steel beams stretched out of the movable end is determined; S2, according to the length of the vacant space, the combination and number of uniform-section steel tenons are calculated and determined, and after the uniform-section steeltenons are filled, the vacant space with a certain length is reserved; and S3, a pair of wedge-shaped steel tenons are plugged into the reserved vacant space with the certain length, then the wedge-shaped steel tenons are extruded through a fastening device, and then the uniform-section steel tenons are pressed. According to the fixing method, the erection time of the steel support is saved, thetechnical content of steel support erection is increased, meanwhile, an existing wedge-shaped tenon hammering and plugging method process can be effectively improved, the risk that the wedge-shaped steel tenons are popped out is eliminated, and the good future achievement transformation prospect is achieved; and the wedge-shaped steel tenon can be directly manufactured into a product and widely applied to deep foundation pit steel support construction, especially a long and narrow foundation pit of a subway.
Owner:HOHAI UNIV

Formwork supporting structure for reserved hole roof cover construction

The invention discloses a formwork supporting structure for reserved hole roof cover construction. The structure comprises a plurality of layers of reserved holes. Fixed type steel beams are arranged at the two opposite side edges of an opening of the reserved hole in the top layer, a plurality of uniformly-distributed secondary beams are fixedly arranged between the two side steel beams, the two ends of the secondary beams are fixed to the two side steel beams, supporting scaffolds are erected on the two side steel beams, and bases of the supporting scaffolds are arranged on the two side steel beams respectively; two supporting beams below a board are arranged on the tops of the supporting scaffolds, the two supporting beams below the board are right opposite to the two steel beams, a plurality of uniformly-distributed secondary beams below the board are fixedly arranged between the two supporting beams below the board, and the two ends of the secondary beams below the board are arranged on the two supporting beams below the board respectively; a formwork is arranged above the supporting beams below the board and the secondary beams below the board. According to the formwork supporting structure, the problem that in the prior art, during reserved hole roof cover casting construction, potential safety hazards exist when a floor type formwork support is arranged is solved, and the purposes of lowering potential safety hazards while supporting is provided for reserved hole roof cover cast-in-place are achieved.
Owner:CHINA MCC5 GROUP CORP

Network extender based on LRE (Long- Reacher Ethernet) technique

InactiveCN104579418AShorten the erection timePromote universal accessRepeater circuitsControl switchEthernet
The invention discloses a network extender based on the LRE (Long- Reacher Ethernet) technique. The network extender comprises a casing, wherein a mainboard is mounted in the casing, data interfaces which are connected with the mainboard are arranged on the rear side of the casing, a power interface is arranged on one side of the casing, status indicator lamps are arranged on the upper side of the casing, a plurality of heat radiating grooves are formed in the bottom surface of the casing, heat radiating holes are formed in the casing in the heat radiating grooves, an exhaust fan is mounted below the heat radiating grooves, and a control switch is arranged on the exhaust fan. The network extender disclosed by the invention has the advantages that the latest LRE technique is adopted, so that the conventional transmission distance of 100 meters is broken through at a lower cost, the network extender is plug-and-play, no software or protocol conversion is needed, the time for network erection is greatly shortened, and the popularization and the development of the broadband network are greatly promoted.
Owner:XIAN LUOLINGJIE ELECTRONICS COMM TECH

Container type two-layer parking tower library

The invention discloses a container type two-layer parking tower library, and relates to the technical field of parking libraries. The container type two-layer parking tower library comprises a groundrail, and one surface of the ground rail is slidingly connected with multiple lower containers. Upper containers are slidingly connected between opposite slopes of the lower containers, one side faceof the ground rail is slidingly connected with a sidesway ramp, one surfaces of the upper containers are slidingly connected with guide devices, the slopes on the two sides of the lower containers are fixedly connected with multiple sliding rods, the slopes on the two sides of the upper containers are fixedly connected with sliding grooves, and the inner surfaces of the sliding grooves are slidingly connected with the sliding rods. Through the cooperation of the upper containers and the lower containers, automobiles can be driven into the lower containers through the sidesway ramp, the uppercontainers can rapidly rise and fall through movement and extrusion of the lower containers, the parking speed of the automobiles is increased while the automobiles are protected against damage, and the advantages that the conveying speed of the parking tower library is increased, and the safety is guaranteed are achieved.
Owner:FOSHAN UNIVERSITY

Construction method for assembled building cantilevered element

The invention discloses a construction method for an assembled building cantilevered element, and belongs to the technical field of the assembled building. The construction method for the assembled building cantilevered element comprises the steps that the construction is prepared; the element is hoisted; a pendant-fitting is hanged, and the pendant-fitting is connected with the element; the elevation, verticality and levelness of the element is adjusted; a reserved steel bar of the element is fixed with a plate tendon; slab concrete is poured; and after the concrete reaches the design strength, the pendant-fitting is removed. The construction method for the assembled building cantilevered element is based on the steel mixing assembled structure system, without the need for using a traditional support system, the construction site is clean, neat, and unblocked, the construction period is short and the construction cost is low.
Owner:CHANGDA BUILDING MATERIAL CO LTD

Manufacturing method of mold for welding grid steel frame used for mining method primary support

The invention discloses a manufacturing method of a mold for welding a grid steel frame used for mining method primary support. The manufacturing method comprises the following steps of: (1) designing the grid steel frame welding mold according to the design drawing of the grid steel frame; (2) establishing a three-dimensional model of the grid steel frame welding mold by applying revit software; and (3) laying a baseplate on the ground, laying off and positioning on the base plate by using the three-dimensional model of the grid steel frame welding mold, and then welding multiple groups of brackets different in configurations on the base plate. The manufacturing method has the beneficial effects that the manufacturing accuracy of the mold can be ensured very well, and further the ring formation quality of the grid steel frame is ensured; the manufacturing method is fast in speed; the mold is high in accuracy, stable in quality and convenient to install; the erection time in a tunnel can be shortened; the exposure duration of surrounding rocks is shortened; the ring formation as early as possible is ensured; and the safety risk and influence on surrounding environments are reduced.
Owner:CHINA CONSTR SIXTH ENG DIV CORP

Portable automatic target recording device based on telephoto lens

InactiveCN107152892AAvoid breakingSimplify the erection procedureTarget detectorsTest performanceTelephoto lens
The invention provides a portable automatic target recording device based on a telephoto lens. The device can be used for light-weapon firing practice training or checking, and a shooter can conveniently observe shot positions on a target plate in real time; the device is composed of the telephoto lens (1), a main case (2), a display screen (3) with the adjustable angle and a support (4); an image collecting and processing module and an auxiliary module are contained in the main case (2). According to the automatic target recording device, the image collecting and processing module is away from a gunnery target plate, in the firing practice process, the device cannot be damaged, the device and an existing manual target recording means are implemented in parallel, target paper of each shooter can serve as a test performance to be filed, all components in the device are connected into a whole mechanically, the erecting program of the device is simplified, and the erecting time is shortened. A detection object o the target recording device is a shooter visual angle target paper, and the displayed shot position and the actual shot position are consistent.
Owner:成都臻达伺服控制技术有限公司

High-maneuverability anti-overturning vehicle-mounted platform system

The invention discloses a high-maneuverability anti-overturning vehicle-mounted platform system which comprises a vehicle-mounted platform, four main legs fixedly arranged on the left side and the right side of the vehicle-mounted platform and four movable supporting legs arranged on the front side and the rear side of the vehicle-mounted platform, and the four main legs are used for keeping the vehicle-mounted platform in a horizontal state through a four-point automatic leveling algorithm. The four movable supporting legs are used for expanding the supporting range of the vehicle-mounted platform, each movable supporting leg comprises a supporting arm hinged to the vehicle-mounted platform, an auxiliary leg fixedly arranged at the tail end of the supporting arm and a self-locking oil cylinder for driving the supporting arm to be unfolded and locking the position of the supporting arm at the unfolding position, and the four auxiliary legs are used for anti-overturning supporting of the vehicle-mounted platform. When the vehicle-mounted platform system is erected, the supporting arms are unfolded at the same time when the main legs are leveled, the erecting time is saved, quick erecting and retracting are achieved, meanwhile, the anti-overturning capacity of the vehicle-mounted platform is improved, and the vehicle-mounted platform system is particularly suitable for erecting alarge planar array antenna with the height larger than 18 m.
Owner:ANHUI BOWEI CHANGAN ELECTRONICS

Carbon fiber tent rack

The invention discloses a tent rack. The tent rack comprises a plurality of carbon fiber pipes, a plurality of plastic fittings and a plurality of screws, wherein through holes where screws pass are arranged on the pipe walls of edges of two ends of the carbon fiber pipes and on the pipe walls of edges of at least one ends of the plastic fittings, and the carbon fiber pipes and the plastic fittings are connected through a direct plugging structure and are fastened through screws; the tent rack comprises a square base and at least one support unit; the square base is formed by a front bottom beam, a left bottom beam, a back bottom beam and a right bottom beam which are sequentially connected through the fitting 6; the front bottom beam and the back bottom beam are formed through the connection of two carbon fiber pipes through the fitting 1, and the left bottom beam and the right bottom beam are formed by one carbon fiber pipe or through the connection of two carbon fiber pipes through the fitting 2; and the support unit is a V-shaped ceiling rack formed by three purlines, four cant beams and four upright columns. The carbon fiber tent rack has the capabilities of improving the structural strength of a tent, reducing the weight and the volume of the tent, and shortening time for assembling and disassembling.
Owner:THE QUARTERMASTER EQUIPMENT RESEARCH INSTITUTE OF THE GENERAL LOGISITIC DEPARTME +1

Porcelain clamping plate of insulated wire

The invention provides a porcelain clamping plate of an insulated wire, which is convenient to operate, convenient and rapid of install, and capable of reducing the labor intensity. The porcelain clamping plate comprises an upper wire clamping plate, a lower wire clamping plate, a fixation hook, a pair of gaskets and a pair of nuts, wherein the fixation hook is U-shaped, two ends of the fixation hook are provided with external threads respectively, the upper part of the upper wire clamping plate is provided with an upper arc top which is matched with the fixation hook, the bottom surface of the upper wire clamping plate is provided with an inward concave upper wire clamping groove, a plurality of upper convex arcs and a plurality of upper concave arcs are disposed in the upper wire clamping groove, the upper convex arcs and the upper concave arcs are disposed alternatively, the lower wire clamping plate is provided with a lower wire clamping groove, the lower wire clamping groove is arranged opposite to the upper wire clamping groove, a plurality of lower convex arcs and a plurality of lower concave arcs are disposed in the lower wire clamping groove, the upper convex arcs and the lower convex arcs are disposed in an alternative manner, the upper concave arcs and the lower concave arcs are disposed in an alternative manner, an upper friction groove is disposed on each upper convex arc, and a lower friction groove is disposed on each lower convex arc. The porcelain clamping plate provided by the invention is convenient and safe to use, and capable of improving the work efficiency and reducing the danger coefficient.
Owner:JIANGSU ELECTRIC POWER COMPANY YANGZHOU POWER +3

Scaffold with pedal one-piece hanging ladder structure

The invention discloses a scaffold with a pedal one-piece hanging ladder structure. The scaffold comprises a scaffold body, wherein the scaffold body comprises a stand column, an upper supporting frame and a lower supporting frame are arranged on the stand column, an upper pedal and a lower pedal allowing a user to stand on are borne on the upper supporting frame and the lower supporting frame respectively, a hanging ladder is hinged to the upper supporting frame, and is arranged between the upper pedal and the lower pedal, the upper pedal comprises an upper fixed plate fixedly arranged on the upper supporting frame and an upper pedal uncovering body correspondingly arranged above the hanging ladder, and the upper pedal uncovering body is hinged to the upper supporting frame. According to the scaffold, the construction cost and size are effectively reduced, materials can be effectively saved, assembling is rapid, and the scaffold is firm and durable.
Owner:开平创誉棚架设备有限公司

A snap-ring flange connection device for assembled inner support of foundation pit

InactiveCN105604067BNo fastening work requiredFast assemblyExcavationsStress concentrationDevice form
The invention relates to a snap ring type flanging connecting device for foundation pit assembly type internal bracings and belongs to the technical field of foundation pit internal bracing type supports. The device is located at the connecting portion between two foundation pit internal bracing components and is a steel structure assembly composed of two groove flanges, two snap ring type clamping plates and fasteners; one surface of one groove flange is fixed to the end of the corresponding bracing component, the other surface of the groove flange is closely attached to the surface of the other groove flange in an abutting mode, the two groove flanges are buckled through the snap ring type clamping plates, the two snap ring type clamping plates are locked through the fasteners to prevent the snap ring type clamping plates from getting loose outwards and falling off, and therefore the device forms a stable whole. According to the device, there is no need or a little need for bolt fastening operation, the splicing speed of a foundation pit assembly type internal bracing structure is increased, and foundation pit deformation caused by insufficient supports during erection of the internal bracings is reduced; the bending moment at the connecting point acts on the groove flanges and the snap ring type clamping plates to generate shear force, the shear surface is continuous and large in area without stress concentration, and the structure is reasonable and reliable.
Owner:BEIJING UNIV OF TECH +1

A Multi-angle Remote Sensing Measurement Bench

The invention discloses a multi-angle remote sensing measuring rack, and mainly relates to the technical field of remote sensing measuring. The rack comprises a base. A rotary drum is arranged in the base. A drill bit is arranged in the rotary drum. The top of the drill bit is provided with a connecting rod. The connecting rod is provided with a spline. A key groove is formed in the rotary drum. The top of the connecting rod is provided with a connecting sleeve. The top of the connecting sleeve is provided with a rack. A gear meshed with the rack is arranged in the base. The gear is provided with a rotating shaft. The rotating shaft is provided with a first bevel gear. The rotary drum is provided with a second bevel gear. The top of the base is provided with a supporting drum. The top of the supporting drum is provided with a supporting frame. The supporting frame is provided with a probe support. The multi-angle remote sensing measuring rack has the advantages of being capable of being rapidly and stably erected on the uneven ground in the wild, capable of ensuring that the initial measuring position is flush with the ground, capable of improving measuring efficiency and capable of obtaining multi-angle spectral information of remote sensing retrieval.
Owner:JIANGSU VOCATIONAL INST OF ARCHITECTURAL TECH

Embedded mounting method for reinforcing steel bar concrete box girder construction

The invention discloses a flush mounting method of erecting a reinforced concrete box beam, which is characterized by the following steps: (1) a manner of the symmetrical erection is adopted to erect the reinforced concrete box beam; a manner of flush mounting is adopted to erect the last reinforced concrete box beam in the middle; (2) two steel bars are enclosed in a forcing sleeve, the length of each steel bar is smaller than half of the width of the reinforced concrete box beam and the total length of the two bars is less than that of the forcing sleeve; the two steel bars and the forcing sleeve constitute a extension sleeve as a forcing member bar used in erecting the last reinforced concrete box beam; (3) the forcing sleeve is put into hoisting reserved holes of the reinforced concrete box beam, steel bars are respectively inserted into the two hoisting reserved holes and respectively into the two ends of the forcing sleeve. The mounting method of the invention is capable of conveniently erecting the last box beam in the middle into the adjacent box beam in the flush mounting manner and conveniently taking out the two steel bars used for hoisting, which effectively reduces the erection time, shortens the construction period and reduces the construction cost.
Owner:CHINA METALLURGICAL CONSTR ENG GRP

Segmental modular rapid assembly bridge

InactiveCN103422423BImproves buckling stabilityImprove carrying capacityConstructionsOn boardModularity
The invention relates to a sectional type modularization rapid assembled and spliced bridge which comprises springboard bridge sections (1) and standard bridge sections (2). Each springboard bridge section (1) comprises a top board (11), a web (12), a bottom board (13), a pressure bearing interlocking end board (14) and a negative head and positive head connecting lug board (15). Each standard bridge section (2) comprises a top board (21), a web (22), a bottom board (23), a pressure bearing interlocking end board (24) and a negative head and positive head connecting lug board (25). The springboard bridge sections (1) and the standard bridge sections (2) are fixedly connected through the pressure bearing interlocking end boards (14), the negative head and positive head connecting lug boards (15), the pressure bearing interlocking end boards (24) and the negative head and positive head connecting lug boards (25). Every two standard bridge sections (2) are fixedly connected through the pressure bearing interlocking end boards (24) and the negative head and positive head connecting lug boards (25). Every two assembled and spliced bridges are fixedly connected through a transverse connecting arm (3). The sectional type modularization rapid assembled and spliced bridge has the advantages of being convenient to transport, flexible to assemble and splice, capable of being erected rapidly, and particularly suitable for releasing emergencies and disasters. The webs are made of corrugated steel, and the bottom boards are made of laminated composite materials.
Owner:RES INST OF HIGHWAY MINIST OF TRANSPORT +1

Manufacturing method of welding mold for initial support grid steel frame in mine method

The invention discloses a manufacturing method of a mold for welding a grid steel frame used for mining method primary support. The manufacturing method comprises the following steps of: (1) designing the grid steel frame welding mold according to the design drawing of the grid steel frame; (2) establishing a three-dimensional model of the grid steel frame welding mold by applying revit software; and (3) laying a baseplate on the ground, laying off and positioning on the base plate by using the three-dimensional model of the grid steel frame welding mold, and then welding multiple groups of brackets different in configurations on the base plate. The manufacturing method has the beneficial effects that the manufacturing accuracy of the mold can be ensured very well, and further the ring formation quality of the grid steel frame is ensured; the manufacturing method is fast in speed; the mold is high in accuracy, stable in quality and convenient to install; the erection time in a tunnel can be shortened; the exposure duration of surrounding rocks is shortened; the ring formation as early as possible is ensured; and the safety risk and influence on surrounding environments are reduced.
Owner:CHINA CONSTR SIXTH ENG DIV CORP

An ultra-light satellite portable station

The present application relates to the technical field of communication satellites, and in particular to an ultralight satellite portable station, which comprises an antenna assembly and a support frame. The antenna assembly comprises an antenna surface, a feed support, a pitch transmission mechanism, and an azimuth transmission mechanism. An electrical box is integrated on the back side of the antenna surface. The feed support is located on both sides of the antenna surface. The feed support is connected to the pitch transmission mechanism. The pitch transmission mechanism is connected to the azimuth transmission mechanism. The azimuth transmission mechanism is connected to the support frame by means of a fast installation mechanism. The front side of the antenna surface is connected at fixed included angles to a radio frequency transceiver assembly and a secondary reflection surface by means of a radio frequency transceiver assembly limit rod. An antenna controller, a satellite modem, a built-in device and so on are placed on the back side of the antenna surface, thereby preventing the direct irradiation of sunlight and optimizing the counterweight of the antenna. The antenna surface employs a folding hinge design, which eliminates the need for traditional multi-lobe assembly links, greatly saves on installation time and enhances the integrity of the antenna.
Owner:NANJING CHINA SPACENET SATELLITE TELECOM
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