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2572results about How to "Low construction cost" patented technology

Multipoint synchronous push construction method for porous large-span continuous steel truss girder

The invention discloses a multipoint synchronous push construction method for a porous large-span continuous steel truss girder, which comprises the following steps of: (1) assembling a steel truss girder assembling platform and a push slideway in a shoreside bridge pier position; (2) assembling a section of steel truss girder and a guide girder on the steel truss girder assembling platform; (3) installing a vertical jack for carrying out support conversion on the steel truss girder and then installing a continuous push jack, a steel strand and an electrohydraulic integrated control system; (4) operating the electrohydraulic integrated control system for carrying out push operation on the steel truss girder; and (5) after the push operation of the section of steel truss girder is finished, continuously assembling the steel truss girder on the steel truss girder assembling platform, carrying out next push operation, repeating the step for circulating operation and finishing the push construction of the porous large-span steel truss girder. The invention has the advantages of short construction period, safe construction, quality guarantee, low cost, and the like, realizes the push operation of the large-span steel truss girder, saves the construction cost, and reduces the pollution to a river channel.
Owner:1ST ENG OF CHINA ZHONGTIE MAJORBRIDGE GROUP +1

GPRS (General Packet Radio Service) communication-based remote online monitoring system and method for sewage treatment equipment

InactiveCN102830673ARealize real-time monitoring and observationRealize analysisProgramme total factory controlGeneral Packet Radio ServiceManagement efficiency
The invention discloses a GPRS (General Packet Radio Service) communication-based remote online monitoring system and method for sewage treatment equipment. The monitoring system comprises a field information acquisition control subsystem, an information transmitting subsystem and an information terminal subsystem, wherein the field information acquisition control subsystem and the information terminal subsystem are subjected to data transmission through the information transmission subsystem; the field information acquisition control subsystem comprises a video and monitoring integrated machine, an information acquisition unit and a control unit; the information transmission subsystem comprises field GPRS wireless transmission equipment, a GPRS wireless transmission network and terminal GPRS wireless transmission equipment; the information terminal subsystem comprises a server, a monitoring center, a mobile phone client and / or PC (Personal Computer) client; and the control unit is a programmable logic controller. The monitoring system can be used for monitoring the operation state of the remote sewage treatment equipment in real time and carrying out alarming and preliminary remote diagnosis treatment on operation faults of the sewage treatment equipment. In addition, the system is low in building expenses and high in management efficiency.
Owner:广西益江环保科技股份有限公司

Robot navigation system and navigation method

The utility model discloses a robot navigation system and a navigation method. The robot navigation system comprises a navigation network which is formed by a plurality of wireless access points, a wireless communication module which is used for transferring data and collecting the intensity sequence communicated with the wireless access points, a sensor which is used for checking that the robot meets barriers or not, and a position server which is used for storing the referenced intensity sequence and running the intricate position arithmetic, and is characterized in that the position server is connected with the wireless communication module and interacts with the navigation network. The navigation method is characterized in that the robot judges the next target position until reaches the destination by comparing the intensity sequence collected in real time with stored reference intensity sequence of the position points; when the robot meets barriers, the robot records and demarcates the intensity sequence of the position in order to avoid entering the position again, therefore achieving intellectual learning; the robot can upload the correlative information to the position server and achieve the assistant navigation position by the help of the database of the position server and the position arithmetic. The utility model is not likely to be affected by the environment and also has the advantages of low cost of maintenance.
Owner:INST OF AUTOMATION CHINESE ACAD OF SCI

Combined denitrification apparatus and method by shortcut nitrification and anaerobic ammonium oxidation of sludge-digestion liquid

The invention discloses a device for autotrophic nitrogen removal by combining A/O shortcut nitrification of sludge digestion liquid and anaerobic ammonium oxidation of granular sludge and a method thereof. The device of the invention comprises a digestion liquid tank, an A/O shortcut nitrification tank, a sedimentation tank, a middle water tank, an anaerobic ammonium oxidation tank, wherein, the digestion liquid tank is communicated with a first cancellus as an anoxic zone of the A/O shortcut nitrification tank by the inlet pump of the A/O shortcut nitrification tank; the sedimentation tank the upper part of which is communicated with the middle water tank by a water pipe is provided with a central pipe and the anaerobic ammonium oxidation tank is provided with a water bath sleeve and a granular sludge bed. In addition, the method of the invention comprises the following steps of starting the A/O shortcut nitrification tank; starting the anaerobic ammonium oxidation tank of the granular sludge; operating an autotrophic biological nitrogen removal system in series after the starting of the A/O shortcut nitrification tank and the anaerobic ammonium oxidation tank is respectively completed. The device and the method of the invention are applicable to the shortcut nitrification and the nitrogen removal of the sludge digestion liquid in a sewage treatment plant and have the advantages of advanced technology, simple structure of the device, convenient operation and good treatment effect of water purification.
Owner:BEIJING DRAINAGE GRP CO LTD

Construction method for enhancing extraction effect of ground coal bed gas

The invention relates to a construction method for enhancing the extraction effect of a ground coal bed gas, comprising the following steps of: (1) constructing a vertical cave well, forging caves on coal beds with coal bed gases needed to extract, and placing fiberglass casings into the caves; (2) constructing a vertical well section and a lower branched main horizontal well hole of a horizontal well, respectively forwards constructing the lower branched main horizontal well hole and a horizontal branched well hole positioned in front of a lower branched cave after butting with the vertical cave well, returning to a position nearby the rear end of the vertical cave well and then constructing a horizontal branched well hole positioned at the rear of the lower branched cave; (3) after a lower branched well hole is constructed, carrying out side drilling to construct an upper branched well hole; (4) after an uppermost branched well hole is constructed, plugging inclined well sections of main horizontal well holes inside the horizontal well from a side drilling windowing point to a coal seeing point by using cementing cement; (5) drilling and flushing the vertical cave well, installing discharge and extraction equipment, and extracting the coal bed gas by discharging water and reducing pressure on the ground. The invention can shorten the construction period, reduce the construction and production cost, decrease the lands used for construction and extraction and enhance the extraction effect of the ground coal bed gas.
Owner:XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP

Composite energy system of solar energy, ground source heat pump and chilled water storage

A composite energy system of solar energy, ground source heat pump and chilled water storage comprises an air conditioner, a domestic hot water supply device, one or more device (hereinafter referred to as host) of a solar energy heat-collecting device, a heat storage water tank unit, a cold storage water tank unit and a ground source heat pump system, a ground heat exchanger, an auxiliary heating device, a circulating water pump, a first electric three-way valve, a second electric three-way valve, a first electric two-way valve and a second electric two-way valve, wherein the circulating water pump is communicated with the air conditioner, and the auxiliary heating device is communicated with the domestic hot water supply device. The invention fully utilizes renewable energy sources such as solar energy, geothermal energy and biomass energy to masterly combine the ground source heat pump air-conditioning system with the solar energy hot water system and the chilled water storage system and construct a comprehensive energy system combined by the domestic hot water system, the ground source heat pump, the chilled water storage air-conditioning system and the like; and the invention is completely combined with the entire building so as to greatest reduce the floor space and the investment and increase the energy efficiency and economic performance of the system.
Owner:TONGJI UNIV

Automatic charging system based on snakelike-simulated mechanical arm and method

The invention discloses an automatic charging system based on a snakelike-simulated mechanical arm. The automatic charging system comprises the snakelike-simulated mechanical arm, a charging device and a control system, and further comprises all control and execution modules, the control and execution modules are mutually matched, and whether to-be-charged vehicles exist or not can be automatically induced through a vehicle induction module; a charging-port pre-alignment module identifies charging ports through installed sensors, and general orientations of the charging ports are preliminarilycalculated; a main control module of a microcomputer is prepared, and is installed in a charging pile base, and the main control module controls the mechanical arm to clamp charging guns to move in the pre-alignment direction; an accurate alignment module of a snakehead-simulated joint accurately determines positions of the charging ports through the corresponding sensors and charges the to-be-charged vehicles. According to the automatic charging system based on the snakelike-simulated mechanical arm, vehicle using experiences of new-energy vehicles and automatic guide vehicles are greatly improved, the automatic charging requirements of automatic sites such as automatic-parking-place vehicles are met, a complete automatic parking and automatic inter-vehicle service system is formed, thelabor cost is greatly reduced, and the running efficiency is improved.
Owner:TONGJI UNIV

Main girder construction process for extradosed cable-stayed bridge with double towers and double cable planes

The invention discloses a main girder construction process for an extradosed cable-stayed bridge with double towers and double cable planes. The extradosed cable-stayed bridge is provided with two main piers and two side blocks; a main girder is a single-box double-room prestressed concrete continuous variable cross-section box girder; a main span is constructed in 53 segments and comprises a middle span closure segment; and a side span is constructed in 24 segments and comprises a side span support cast-in-place segment and a side span closure segment. The main girder construction process for the extradosed cable-stayed bridge with the double towers and the double cable planes is characterized in that the order of the construction steps of the main girder construction process is first constructing No. 0 blocks in two main tower positions; performing cantilever pouring on segments from No. 1 to No. 20 on the sides of the side span and the main span in sequence; constructing No. 21 segments on the side blocks in the process of constructing the segments from No. 1 to No. 20; constructing the side span closure segment; performing cantilever pouring on segments from No. 22 to No. 26 on the side of the main span; and finally constructing the middle span closure segment. The main girder construction process for the extradosed cable-stayed bridge with the double towers and the double cable planes has the advantages of reasonable step design, short construction period, safe and reliable construction and high quality.
Owner:CCCC THIRD HARBOR ENG +2

Apparatus and method for entire journey autotrophy denitrification of digested sludge dewatered liquid biomembrane

The invention relates to a biofilm full-rang autotrophic nitrogen removal device of digested sludge dehydrolysis liquid and a method thereof; wherein, the device is provided with a digested sludge dehydrolysis liquid pool, a pre-hypoxia denitrification pool, a short-range biofilm nitrification pool, a sedimentation pool, an intermediate pool and a biofilm anaerobic ammonia oxidation pool; the method consists of the following steps: 1. the pre-hypoxia denitrification pool and the short-range biofilm nitrification pool are started to operate; 2. the biofilm anaerobic ammonia oxidation pool is started; 3. the biofilm full-rang autotrophic nitrogen removal system of the digested sludge dehydrolysis liquid is operated in series. The device is suitable for biological nitrogen removal of wastewater containing high ammonia nitrogen, such as the digested sludge dehydrolysis liquid, late landfill percolate, coking wastewater, monosodium glutamate wastewater, etc. The device realizes efficient biological nitrogen removal of wastewater with high NH4<+>-N and low ratio of C/N, greatly decreases the construction and operation cost of nitrogen removal of wastewater, reduces alkalinity demand of the nitrification, runs stably, operates easily and has stronger shock resistance loading capability; meanwhile, the device is strongly adaptable to temperature fluctuation and toxic substances, which is easy to recover after being restrained.
Owner:BEIJING DRAINAGE GRP CO LTD +1

Method for constructing a chair-type, self-supported earth retaining wall

The present invention provides a method for constructing a chair-type, self-supported earth retaining wall used for retaining external forces such as earth pressure prior to an excavation. The method of the present invention forms a first column of piles having a plurality of piles arranged along the circumference of the region to be excavated. Subsequently, the method comprises forming a second column of piles having a plurality of piles by consecutively perforating a plurality of holes by a predetermined spacing at predetermined positions outwardly from the first column of piles, along the circumference of the region to be excavated, inserting H-beams into the respective holes, filling left and right spaces of the webs of the H-beams with soil, and filling the outer spaces of the flanges of the H-beams with a flowable stiffening material. The method subsequently comprises interconnecting the first column of piles and the second column of piles by a connection member. The first column of piles and the second column of piles are formed along the circumference of the region to be excavated, with an outward spacing, and connected to each other by the connection member.
The present invention provides a method for constructing a chair-type, self-supported earth retaining wall used for supporting external forces such as earth pressure prior to an excavation. The method of the present invention comprises forming a first pile array 20 having a plurality of piles 22 arranged along a circumference of an region to be excavated. Subsequently, the method comprises forming a second pile array 30 having a plurality of piles arranged along a circumference of the to-be-excavated region by consecutively drilling a plurality of boreholes 31 at predetermined intervals at predetermined positions outwardly spaced apart from the first pile array, inserting H-beams into the respective boreholes, filling left and right spaces of webs 34 of the H-beams 32 with soil 40, and filling the outer spaces of flanges 36 of the H-beams with a flowable hardening material 50.
The method subsequently comprises fixedly interconnecting the first pile array and the second pile array using a connection member. The first pile array and the second pile array are formed in such a fashion as to be outwardly spaced apart from each other along the circumferences of the to-be-excavated region, and are connected to each other by the connection member to construct an underground earth retaining wall.
Owner:KOLON CONSTR CO LTD

Discrete flexible die

ActiveCN103752691AHigh shape adjustment accuracyFast shape adjustmentShaping toolsMachine pressPiezometer
Disclosed is a discrete flexible die. An upper discrete die is connected with an upper sider of a press, a lower discrete die is combined with a base of the press and comprises a lower die support, a top supporting plate of the lower die support is assembled with hydraulic tensioning sleeves, oil supply of each hydraulic tensioning sleeves is realized through an oil pipe, a piezometer is mounted at the tail end of each row of the oil pipes, a punch is inserted into a middle round hole of each hydraulic tensioning sleeve, and an electric push rod is mounted below each punch; the upper discrete die comprises an upper die support, hydraulic tensioning sleeves are mounted on a middle supporting plate of the upper die support, oil supply of each hydraulic tensioning sleeve is realized through an oil pipe, and a piezometer is mounted at the tail end of each row of the oil pipes. Shape adjusting is realized by adopting the electric push rods controlled by a circuit, and the die punches are locked through the hydraulic tensioning sleeves after shape adjusting is completed; the punches is high in bearing capacity, thereby being capable of used for plate forming and part supporting; the whole discrete flexible die is simple in structure and low in manufacturing cost; two implementable schemes are provided for curved surface continuation after forming, and the discrete flexible die is high in efficiency, low in cost and free of environmental pollution.
Owner:XI AN JIAOTONG UNIV
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