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3235results about How to "Save installation time" patented technology

Method and system for monitoring and warning pipeline landslide and method for constructing system

The invention relates to a method and a system for monitoring and warning a pipeline landslide based on a fiber Bragg grating and a method for constructing the system. The monitoring is performed on four parts including landslide depth displacement, landslide surface displacement, thrust of landslide on a pipeline and pipeline strain, and comprises the steps of: firstly, inserting an inclinometerpipe (1) pasted with a fiber Bragg grating sensor from the landslide (13) to all potential sliding surfaces (15); secondly, embedding a slender concrete ground beam (2) of which two ends are fixedly restrained and the axial direction of a central reinforced bar (17) is stuck to a ground beam fiber Bragg grating sensor (20) in a direction vertical to the deformation direction of the landslide (13)below the surface of the landslide (13); thirdly, measuring the thrust of the landslide (13) on the pipeline by using an earth pressure cell fiber Bragg grating sensor (4) fixed on the pipeline (14);and fourthly, arranging monitoring sections on edges on two sides and the pipeline (14) in the center of the landslide (13), and uniformly arranging three pipe strain fiber Bragg grating sensors (3) on each monitoring section to monitor the axial strain of the pipeline (14).
Owner:PIPECHINA SOUTH CHINA CO

Three-truss main girder structure of highway and railway bi-purpose cable-stayed bridge and installation method thereof

The invention relates to a three-truss main girder structure of a highway and railway bi-purpose cable-stayed bridge and an installation method thereof, relating to the technologies of designing and constructing a heavy load and long span highway and railway bi-purpose cable-stayed bridge. The structure of three main trusses comprises a middle truss piece and side truss pieces arranged on both sides of the middle truss piece, wherein an orthotropic slab and a transverse bracing truss are arranged between the upper edges of the middle truss piece and each side truss piece, and a railroad transverse girder, a railroad longitudinal girder and a horizontal bracing cross bridging are arranged between the lower edges of the middle truss piece and each side truss piece; and the invention provides the installation method adopting adaptive pre-splicing of multiple truss-sections, arrangement of temporary constructional rod pieces, integral lifting of each truss section and multi-node simultaneous alignment. The invention has the beneficial effects of: 1. pushing the highway and railway bi-purpose cable-stayed bridge to develop towards the direction of large span and heavy loading, 2. improving the installation efficiency and quality, 3. reducing the quantity of welding lines of construction sites, 4. innovatively practicing the multi-point simultaneous butt joint technology, 5. adopting the temporary rod pieces for solving the problems of unstability and large deformation in the processes of delivering and lifting the truss sections, 6. strengthening the adaptability of adjacent truss sections, and 7. solving the problems of inconsistent deformation of the middle and the side trusses and inconsistent centre-of-gravity positions of the truss sections.
Owner:CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD +1

Method for producing hot-melt-adhesive aluminum-plastic composite tape

The invention discloses a method for producing a hot-melt-adhesive aluminum-plastic composite tape. The method provided by the invention comprises the following steps of: manufacturing a composite semi-finished product of aluminum foil and plastic thin film, preparing a hot melt adhesive, coating the hot melt adhesive, drying the hot melt adhesive, cooling, coiling, and cutting. On the productionline of a PVC (Poly Vinyl Chloride) cable sheath, the hot-melt-adhesive aluminum-plastic composite tape and the sheath material can be bonded together by utilizing the temperature of the sheath when the PVC cable sheath material is extruded; the adhesive force is strong and the testing performance is good; and when a user strips the cable PVC sheath, the hot-melt-adhesive aluminum-plastic composite tape can be easily stripped so that the procedure of stripping two times is omitted, the mounting time is greatly saved and the damage on the cable is reduced. The hot-melt-adhesive aluminum-plastic composite tape manufactured with the method can be widely applied to a communication cable industry, and can propel the application reformation of the communication cable industry on the hot-melt-adhesive aluminum-plastic composite tape and also exploit a new application market of the hot melt adhesive.
Owner:FLY DRAGON PRECISION TECH SUZHOU CO LTD

Detection device for steel tube weld seams through X-ray real-time imaging

The invention relates to a detection device for steel tube weld seams through X-ray real-time imaging. The detection device comprises a steel tube detection conveyor line formed by conveyor roller joined parts fixed on mill floor foundation and a detection protection chamber which is arranged at the conveyor roller joined parts at the tail end of the steel tube detection conveyor line, is connected with the steel tube detection conveyor line and is in a same floor foundation with the steel tube detection conveyor line; the conveyor roller joined parts used for bearing workpieces to be detected are arranged in the detection protection chamber; lifting rotating wheel joined parts are arranged between the conveyor roller joined parts; and the detection protection chamber is internally provided with an X-ray receiver joined part, an arm jack joined part and an X-ray pipe support joined part. The detection device provided by the invention can be used for substituting the existing workpiecedetecting car in detecting the steel tube weld seams through the X-ray real-time imaging, so as to meet the requirements on detecting circumferential weld seams, straight weld seams and spiral weld seams of tubular objects. The detection device occupies a small area, is low in energy consumption and high in detection efficiency and is convenient for installing, so that a large amount of money andenergy is saved for users and the cost is reduced.
Owner:DONGDAN AOLONG RADIATIVE INSTR GRP

Floating member used for waterborne photovoltaic power station and connection method thereof

The invention discloses a floating member used for a waterborne photovoltaic power station and a connection method thereof. The floating member at least comprises a floating member body which can be floated on water. The floating member body comprises a first end part and a second end part. Height of the upper surface of the first end part is lower than that of the upper surface of the second end part. The upper surface of the floating member body, which is close to the first end part, is provided with a first connection structure which is used for being detachably connected with the first connection piece of the back surface of a photovoltaic panel. The upper surface of the floating member body, which is close to the second end part, is provided with a second connection structure which is used for being detachably connected with the second connection piece of the back surface of the photovoltaic panel. Height of the upper surface of the first end part of the floating member body is set to be higher than that of the upper surface of the second end part, and the connection structures connected with the photovoltaic panel are directly arranged on the upper surface of the floating member body so that the installing technology of the photovoltaic power station can be greatly simplified, installing time can be saved and installing cost can be reduced.
Owner:SHANGHAI QIHUA WHARF ENG CO LTD

Hydraulic capturing and clamping type aircraft engine rotor assembling method and device based on inductance sensing

The invention relates to a hydraulic capturing and clamping type aircraft engine rotor assembling method and device based on inductance sensing, and belongs to the machine assembling technology. According to the hydraulic capturing and clamping type aircraft engine rotor assembling method and device, a rotation standard is determined based on an air floating rotation shaft system; angle location of a rotary table is determined according to an inductive synchronizer; based on a four-measuring-head measuring device, radial errors of a rotor radial assembly face and slant errors of an axial assembly face are extracted, and the influence weights of rotors on the rotor coaxiality after the rotors are assembled are obtained; all the rotors required to be assembled are respectively measured, and the influence weights of the rotors on the rotor coaxiality after the rotors are assembled are obtained; vector optimizing is carried out on the weights of the rotors, and the assembling angles of the rotors are obtained. According to the hydraulic capturing and clamping type aircraft engine rotor assembling method and device, the problem that the coaxiality is low after the aircraft engine rotors are assembled is solved, and after the rotors are assembled, the hydraulic capturing and clamping type aircraft engine rotor assembling method and device have the advantages of being high in coaxiality, reducing vibration, being easy to install and high in flexibility, and improving the engine performance.
Owner:HARBIN INST OF TECH

Method and system for monitoring oil-gas pipeline in mining subsidence area and system constructing method

InactiveCN102345793AReveal Security WarningReveal collapse featuresPipeline systemsUsing optical meansRelative displacementGas pipeline
The invention discloses a method and a system for monitoring an oil-gas pipeline in a mining subsidence area and a system constructing method. The method comprises the following steps of: monitoring axial strain of a pipe body with a fiber grating strain sensor, monitoring pipe-soil relative replacement with a fiber grating displacement sensor, and monitoring horizontal deformation of a soil body with a fiber grating sensor; demodulating and preprocessing signals acquired by the sensors, and transmitting the signals to a remote monitoring center; further analyzing and processing data in the monitoring center, and computing horizontal deformation change of a soil body on the top of the pipe in the mining subsidence area, axial strain change of the pipe body and pipe-soil relative displacement change; judging the state stabilities of the pipe body strain change and the soil body strain change, and judging whether the data surpass threshold values; when three parameter values are smaller than respective threshold values, judging that the pipeline is in a safe state; and when the axial strain of the pipe body reaches 70 percent of a pipe body limit strain value, or a pipe-soil relative displacement value reaches a threshold value and keeps constant, or a horizontal deformation curve of the soil body changes suddenly, performing pipeline safety joint early-warning.
Owner:PETROCHINA CO LTD

Extensible settlement and incline measuring pipe for measuring settlement and horizontal displacement and mounting method thereof

An extensible settlement and incline measuring pipe for measuring settlement and horizontal displacement is composed of a settlement measuring pipe, an incline measuring pipe, a bottom cover and a joint pipe and is characterized in that the joint pipe is an freely-extensible connection sleeve pipe which is composed of two secondary pipes and a main pipe, the external walls of the two secondary pipes are provided with sliding grooves, and fixing pins arranged on the internal wall of the main pipe are snapped with the sliding grooves of the secondary pipes; and both ends of each secondary pipe are respectively connected with the screws of the settlement measuring pipe and the incline measuring pipe through locating pins. The extensible settlement and inline measuring pipe for measuring the settlement and the horizontal displacement can guarantee the settlement measuring pipe and the inline measuring pipe not to be deformed along with a large-displacement deformation of a soil body, thereby reducing the interaction force between the settlement measuring pipe of the inline measuring pipe and the surrounding soil body and reducing the probability of pipe blocking or pipe breaking; sediment and water can be effectively prevented from entering among every parts; and the freely-extensible joint pipe, the settlement measuring pipe and the incline measuring pipe can be mounted through direct screwing. Therefore, the extensible settlement and inline measuring pipe for measuring the settlement and the horizontal displacement is convenient to build in and mount, has low technical requirements for mounting personnel, can largely reduce the mounting time, and is easy to process and achieve.
Owner:NANJING HYDRAULIC RES INST +1

System and method for measuring deflection of bridge structure based on wireless tilt

The invention discloses a system and method for measuring deflection of a bridge structure based on wireless tilt, belonging to the technical field of bridge structure measurement. The invention is characterized in that the system is jointly formed by two wireless tilt sensors, a wireless data unit and a personal computer (PC), wherein the wireless data unit is connected with the PC via a serial port; and each wireless tilt sensor is jointly formed by a micro electro mechanical system (MEMS) technology based tilt unit, a tilt acquisition unit, a wireless transceiving unit and an energy module. The method is characterized by building the bridge deflection curve formula in consideration of the joint action of the deal weight of the bridge structure and the external load, deriving the deflection formula to obtain the tilt formula, computing the unknown parameters according to the actually measured tilt and further obtaining the deflection. The invention overcomes the defects existing in the traditional wired measuring systems and methods, the system has the characteristics of high testing precision, good stability, strong real-time property, accurate computation, etc, and the method is suitable for measuring deflection of similar bridge structures and has good application prospect.
Owner:DALIAN UNIV OF TECH

Reinforcement cage and manufacturing method thereof

The invention relates to a reinforcement cage and a manufacturing method thereof. The reinforcement cage comprises main reinforcements; the reinforcement cage is divided into a plurality of sections; the main reinforcements, an inner locating stirrup and an outer locating stirrup are arranged in each section of reinforcement cage; the length of the main reinforcements is the same; one ends of the main reinforcements are half wires, and one ends of the reinforcements are full wires; a main reinforcement joint between each section of reinforcement cage is provided with straight thread connectors; and the main reinforcements in each section of reinforcement cage are connected in one-to-one correspondence. The manufacturing method comprises the following steps of: blanking the reinforcements; performing thread rolling on the reinforcement cages; processing the reinforcement cages; storing and delivering the reinforcement cages; splicing the reinforcement cages, preassembling on a spot, putting the processed reinforcement cages end to end according to the sequence of the divided sections into a straight line, sequentially splicing from one end to another end, screwing the connectors one by one, and sequentially arranging the rest reinforcement cages; splicing orifices; and detecting. The invention solves the problem that the reinforcement cage needs to be divided into a plurality of sections for processing and splicing due to the limitation of construction condition. The invention has the characteristics that: the manufacturing method is simple to operate, and the reinforcement cage has high precision and installation rate.
Owner:THE FIFTH ENG CO LTD OF CHINA TIESIJU CIVIL ENG GRP
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