46results about How to "Reduce post-maintenance workload" patented technology

The invention belongs to technical field of building material, especially to a multi-ribbed composite wallboard outer insulation integrated technology and a construction process thereof. The integrated technology comprises a multi-ribbed composite wallboard, a thermal insulation plate arranged outside the multi-ribbed composite wallboard, a hardware mesh sheet arranged outside the thermal insulation plate, a connection reinforcing steel bar and outside plasterer. The construction process comprises steps of preparing the multi-ribbed composite wallboard and inserting the connection reinforcing steel bar; sticking the thermal insulation plate outside the wallboard inserted with the connection reinforcing steel bar after concrete reaches a certain intensity; laying the hardware mesh sheet outside the thermal insulation plate and using the connection reinforcing steel bar to fix the hardware mesh sheet; and plastering outside the hardware mesh sheet and carrying out broom-finish treatment. The technology realizes the integration of the multi-ribbed composite wallboard and outer thermal insulation manufacturing, manufacturing method is simple, construction speed is fast, lasting quality is high, high altitude work quantity for manufacturing general outer thermal insulation, so that the invention can be widely used in practical engineering.

The invention provides basalt and polypropylene hybrid fiber reinforced concrete and a preparing method. Basalt fibers accounting for 0.1-0.5 part of the weight of a concrete matrix and polypropylene fibers accounting for 0.01-0.08 part of the weight of the concrete matrix are doped into the concrete matrix. (1) at the normal temperature, sand and stone are put into a blender to be blended for 60 s; (2) cement is put into the blender to be blended for 60 s; (3) water is added into the blender to be blended for 90 s to 120 s, and a concrete matrix is obtained; and (4) two kinds of fibers including the basalt fibers and the polypropylene fibers are mixed, and are scattered into the concrete matrix obtained in the step (3) to be blended for 120 s after the two kinds of fibers are highly scattered, and then the basalt and polypropylene hybrid fiber reinforced concrete is obtained. Compared with traditional concrete, the basalt and polypropylene hybrid fiber reinforced concrete can better adapt to complex environments such as high temperature, high heat, corrosion and the like, can be widely applied to roads, bridges, buildings, undergrounds and oceanographic engineering, and the concrete application scope is greatly expanded.

The present invention proposes a material distribution control device, system and method, wherein the material distribution control device includes: a position detection module, the position detection module is used to detect the current position of the distribution trolley to obtain the position information of the distribution trolley; corresponding to each receiving bin The set material level detection module, each material level detection module is used to detect the material level of the corresponding receiving bin, so as to obtain the material level information of all receiving bins; the control module, the control module and the position detection module, each material level The detection modules are connected, and the control module is used to control the distributing trolley to carry out the distributing work according to the material level of each receiving bin and the position information of the distributing trolley until all the receiving bins are in a full state. When the material distribution control device controls the material distribution of the material distribution trolley, it has fast response and calculation speed, strong expansion capability, flexible and stable control mode, less detection components, convenient installation, and high material distribution efficiency, which helps to reduce the maintenance workload and cost in the later period. Low.

The invention discloses a simple micro-added resistance large-deformation anchorage device and a simple micro-added resistance large-deformation anchorage method. The device mainly comprises a yielding anchorage device, a guide spring and a rooting anchorage device. Yielding is realized by the gradual damage of multiple threads in a clamping piece of the yielding anchorage device and the compressive deformation of the spring, so that large deformation of surrounding rocks is adapted, and micro-added resistance anchorage force is provided for the surrounding rocks; in such a process, the surrounding rocks can be yielded by 15 to 25cm, larger deformation of the surrounding rocks of a roadway can be adapted, and moreover, the micro-added resistance anchorage force can further be provided to slowly change the deformation of the roadway within a certain range in a deformation process of the roadway, so that the roadway can be well supported, the requirement of large deformation of the roadway can be met, and anchorage effect loss or failure of an anchor rope due to the excessive deformation of the roadway can be avoided. The device and the method can be better adapted to deep well and soft rock dynamic-pressure roadways, roadway maintenance cost is reduced, and the safety and the reliability of the roadway are improved.

The invention discloses a monitor information access automatic identification diagnosis method. The method includes the steps: associating a monitor information access automatic identification diagnosis system with a scheduling automation and distribution automation main station; compiling a standard information base on the basis of different types and models of scheduling automation and distribution automation terminal devices; automatically checking all signal names in the scheduling automation and distribution automation main station by means of the standard information base; and reminding workers of cases that inaccurate meanings and unclear meanings exist, ambiguity tend to occur, the same signal may have different names or the like. In this way, a reliable basis is provided for monitor information access in a transformer station or a power distribution station, and the work efficiency is greatly improved through automatic identification diagnosis of a system. The formation of unified and standard monitor information allows scheduling operation and monitor workers to more clearly know signals acquired in the system and to clearly determine fault signals when faults and large-scale information are uploaded. Therefore, the safety of a power grid is guaranteed.

The invention relates to a wireless data transmission intelligent remote water meter based on ultrasonic modulation. The wireless data transmission intelligent remote water meter comprises a connection mechanism, a mechanical water meter, a data reading assembly, a battery assembly and an ultrasonic assembly, wherein the ultrasonic assembly comprises a single chip microcomputer, an ultrasonic signal modulation and demodulation chip, a forward error correction encoding and decoding chip, an ultrasonic signal switching circuit and an ultrasonic transmitting-receiving energy converter; a data reading manner of the data reading assembly is any one of pulse direct reading, photoelectric direct reading and camera shooting direct reading. The wireless data transmission intelligent remote water meter based on the ultrasonic modulation has the following advantages that the characteristic that the field installation is convenient of an existing wireless intelligent remote water meter can be remained, and meanwhile a phenomenon that the quality of wireless signals of certain existing wireless intelligent remote water meters is influenced by weathers, wireless frequency band crosstalk, building structures and the like can be avoided at the same time; the transmission quality of the signals is improved and the post-period maintenance working amount is reduced.

The invention relates to an all-welded box girder combination section constructing method. The method comprises the specific steps that a girder is divided by making the distance length of two sections serve as one novel box girder combination section, plate units of sectional unit parts are manufactured, a girder lower chord is welded to a lower bridge surface steel box, a girder upper chord is welded to an upper bridge surface panel, a transverse bracing system is welded to a girder vertical rod, the girder vertical rod and an inclined rod are welded to the girder lower chord and the girder upper chord, and the novel box girder combination sections are formed; trial splicing is performed on adjacent novel box girder combination sections on a preset trial assembly platform, and anticorrosion coating is performed on the outer surface. All-welded box girder combinations are welded in place according to a construction order on a bridging construction site. According to the method, the girder is designed into the all-welded box girder combination sections, few hanging units are used, durability of the girder is improved, maintaining workloads during the later period are reduced, site construction is simplified, work efficiency is improved, and an installation period is shortened; the appearance is beautiful, and durability is good. The method has been successfully applied to the Shanghai-to-Nantong railway Yangtze river highway-railway dual-purpose great bridge engineering.

The invention relates to a rockfall buffering flexible protection system, which belongs to the technical field of slope protection systems. The falling stone buffering flexible protection system can provide larger displacement freedom degree for falling stone, reduce impact load of the falling stone, control bouncing height of the falling stone and guide motion trails of the falling stone. The function is that the falling rock interception area of the system is used for attenuating the falling rock kinetic energy from the uphill surface, controlling the falling rock motion trail, and guiding the falling rock motion trail into the falling rock buffering channel at the tail section of the system, so that the falling rock is continuously guided downwards under the constraint effect of the falling rock buffering channel until entering the falling rock accumulation area. The protection system guides falling rocks from an upper slope to a slope toe or a downhill section for centralized accumulation and cleaning, or enables the falling rocks to enter a next protection structure with relatively small kinetic energy and bounce height, so that the falling rocks with relatively high kinetic energy can be protected with relatively low protection energy level and system height.

The invention discloses an ammonia nitrogen image detection device, including an industrial computer, a LCD touch screen, a various-way electromagnetic valve, a peristaltic pump, a dark box, a reactor, a standard light source, an industrial camera, a nessler ' s reagent storage tank, a masking agent storage tank, a distilled water storage tank, a to-be-tested water sample storage tank and a waste liquid storage tank, the nessler ' s reagent storage tank, the masking agent storage tank, the distilled water storage tank, the to-be-tested water sample storage tank and the waste liquid storage tank are connected with the reactor by the various-way electromagnetic valve and the peristaltic pump, the reactor, the standard light source and the industrial camera are arranged in the dark box, the industrial camera is connected with the industrial computer, and the industrial computer is also connected with the LCD touch screen, the peristaltic pump and the various-way electromagnetic valve. The system structure is simplified, cost is reduced, failure rate is reduced, the workload of later system maintenance is reduced, the industrial camera is used for reactor image acquisition, metrological control of a reagent and a water sample can be realized, and through the image processing, the color recognition of a nessler's reaction compound can be realized so as to complete the ammonia nitrogen content detection.

The invention provides a concrete decorating plate and a preparation method thereof. The concrete decorating plate comprises a concrete structure layer, an interface layer and a decorating layer. Raw materials of the concrete structure layer comprise ultrahigh strength concrete and phase change and energy storage particles, and the mass ratio of the phase change and energy storage particles to the ultrahigh strength concrete is 2%-10%; the interface layer is of a net-shaped structure and is arranged on the concrete structure layer; the decorating layer is arranged on the interface layer and the concrete structure layer, and raw materials of the decorating layer comprise, by weight, 300-550 parts of cement, 700-950 parts of 20-40-mesh quartz sand, 240-310 parts of 40-70-mesh quartz sand, 15-22 parts of a water reducing agent, 0.1-0.7 part of cellulose ether and 190-240 parts of water. According to the concrete decorating plate, the concrete structure, the interface layer and the decorating layer matched with the concrete structure layer and the interface layer are adopted, the strength of the concrete decorating plate is improved, and then the thickness of the concrete decorating plate is decreased; the phase change and energy storage particles are added into concrete, phase change heat absorption or heat release is generated by the phase change and energy storage particles, the cold and heat resistance of the concrete decorating plate is improved, an environment temperature adjusting effect is achieved, and then the durability of the concrete decorating plate is improved.

The invention relates to a transformer partial discharge monitoring and evaluation system. The system comprises a monitoring center, a monitoring control module, an anti-interference regulating system, a high frequency current sensor, a signal processing unit, a digital sampling module and a diagnosis unit, the monitoring center is provided with a master server, a human-computer interface, an industrial personal computer, a health assessment module and a health early-warning module, and the master server is connected with the human-computer interface, the industrial personal computer, the health assessment module, the health early-warning module and the monitoring control module located at the transformer end. By means of the system, on-line monitoring can be achieved, test time is short, damage to equipment caused by power failure is reduced, the adopted broadband type high frequency passive current sensor is high in pulse resolution ratio, frequency components of an original signal can be well reflected, and it is facilitated to sufficiently obtain partial discharge information and accurately extract partial discharge characteristics; the health assessment and health early-warning functions are achieved, and the working health state of a transformer can be evaluated through analysis processing on the data.

The invention provides a see-through pile plate combined type sea inlet road structure which comprises reinforced concrete tubular piles, reinforced concrete baffle plates, ripraps, cushion caps and faceplates. The see-through pile plate combined type sea inlet structure is characterized in that the reinforced concrete tubular piles are transversely arranged with one another side by side, each row of the reinforced concrete tubular piles comprises at least two reinforced concrete tubular piles, every two rows of the reinforced concrete tubular piles are taken as a roadbed buttress, the reinforced concrete tubular piles of each roadbed buttress are symmetrically arranged with one another, the lower end of each reinforced concrete tubular pile is inserted into a mud surface of a sea bottom, the upper end of each reinforced concrete tubular pile is embedded into a circular groove of the bottom surface of the cushion cap, each reinforced concrete baffle plate which is inserted into the mud surface of the sea bottom is arranged on the inner side face of each roadbed buttress to form a rectangular space, and the rectangular space is internally filled with the ripraps; the faceplates are arranged on the cushion caps among the roadbed buttresses, two ends of the faceplates are embedded in the middle of the cushion caps, and water passing culverts are formed between the faceplates and the mud surface of the sea bottom; and the roadbed buttresses are symmetrically designed in the shape of a horizontal line, and the heights of the roadbed buttress which are exposed out of the water surface are on one horizontal line. After the see-through pile plate combined type sea inlet structure is adopted, the sea inlet road quick construction problem and the ground movement reuse problem can be solved.

The invention relates to a movable yarn pre-cleaning power providing device and method. The movable yarn pre-cleaning power providing device comprises a scissor, an air cylinder driving the scissor toshear yarn, and a scissor pull rod connected with the air cylinder and the scissor, wherein a movable yarn pre-cleaning component is arranged right below the scissor and comprises a movable yarn pre-cleaning plate and a fixed yarn pre-cleaning plate; a hole is formed in the movable yarn pre-cleaning plate; the scissor pull rod extends downwards to penetrate through the hole in the movable yarn pre-cleaning plate; and the opening-closing state of the scissor is opposite to that of the yarn pre-cleaning plate. The movable yarn pre-cleaning power providing device has the benefits of lowering themanufacturing cost of a complete machine and reducing the later maintaining workload of the complete machine on the premise of ensuring the performance and function of a product unchanged.

The invention discloses a tyre vulcanizing unit, a tyre vulcanizing machine comprising the tyre vulcanizing unit and a vulcanizing process. The tyre vulcanizing unit comprises a base and a guide column which is fixedly connected onto the base, wherein the guide column is connected with an upper movable beam and a middle movable beam from top to bottom; a locking mechanism for limiting the upper movable beam to move along the guide column is arranged on the upper movable beam; opening-closing mould oil cylinder groups for driving the upper movable beam and the middle movable beam to move up anddown along the guide column are arranged on the upper movable beam and the middle movable beam; and a force applying oil cylinder for downwards extruding a first movable mould assembly and a second movable mould assembly is further arranged on the guide column in a sleeving mode. The tyre vulcanizing unit provided by the invention can simultaneously vulcanize two tyres; the tyre vulcanizing unitscan be assembled into a vulcanizing machine with a multi-mode vulcanizing form, so that the number of the tyre vulcanizing unit units can be confirmed according to practical site needs and processingneeds, and the tyre vulcanizing unit units are assembled, and therefore, the production efficiency of a vulcanizing workshop is greatly improved, and use area of the workshop is saved.

The invention discloses a circulatory rinsing type waste gas treatment system which comprises a plurality of waste gas treatment devices and a PLC (Programmable Logic Controller) control cabinet, wherein the waste gas treatment devices conduct remote opening-closing control through the PLC control cabinet. Each waste gas treatment device comprises a pre-filtering assembly, a rinsing assembly, a draught fan and an exhausting assembly which are connected through pipes in sequence. Each exhausting assembly comprises two outlets, wherein one is used for exhausting gases, and the other one is connected with the corresponding pre-filtering assembly. Each exhausting assembly comprises a sensor for detecting the gas content, a control unit of a strobe outlet and an opening-closing unit of two outlets. The output end of each sensor is connected with the corresponding control unit which is connected with the corresponding opening-closing unit. The circulatory rinsing type waste gas treatment system controls the waste gas treatment devices through the PLC control cabinet in a remote control way, is safe and reliable and can further improve the quality of exhausted gases due to the provided circulatory detection function.

The invention provides a bridge and a culvert type sheet-pile structure, which belongs to a building structure of a sea lane embankment in a shallow paralic area. The bridge and culvert type sheet-pile structure has two rows of reinforced concrete prefabricated sheet-piles of which the lower ends are inserted into a bearing stratum of a seabed, wherein a reinforced concrete prefabricated baffle and another reinforced concrete prefabricated baffle with a semi-round slotted hole are arranged on the inner sides of the upper parts of two longitudinal adjacent reinforced concrete prefabricated sheet-piles in a staggered way, and a third reinforced concrete prefabricated baffle with a semi-round slotted hole is arranged on the another reinforced concrete prefabricated baffle; the end part of a culvert pipe is mounted in a round slotted hole and sleeved on the two sides of a reinforced concrete beam at the upper parts of two transverse reinforced concrete prefabricated sheet-piles through through-holes on the two ends; and the upper ends of the two rows of reinforced concrete prefabricated sheet-piles are provided with reinforced concrete longitudinal beams respectively. The sheet-pile structure adopted has the advantages that: seawater on the two sides of the sea lane can be communicated freely; after a project is built, a sea stream field is not affected; ecology is hardly affected; the whole stability is high; a few protection structures are built; work amount is small; transportation and installation are convenient and quick; and post maintenance is little.

The invention discloses a large-opening-degree sliding plug door system for a high-speed freight transportation motor train unit. The large-opening-degree sliding plug door system comprises a bearing drive mechanism, a gantry, a door sash, an external operating mechanism and a lower swing arm assembly. The bearing drive mechanism is fixedly connected with the door sash through the gantry and is located above the door sash, the external operating mechanism is installed on the side face of the door sash and used for controlling the door sash to be opened from the outer side of a vehicle body, and the lower swing arm assembly is arranged below the inner wall of the door sash and used for supporting the door sash for opening or closing. The large-opening-degree sliding plug door system is simple in structure and convenient to assemble, is provided with the lower swing arm assembly below the inner wall of the door sash and used for supporting the door sash for opening or closing, improve the stability of the door sash and can achieve transportation of cargoes of 1500 mm*2600 mm, the bearing drive mechanism greatly saves the space in the vehicle, a rodless air cylinder is adopted for driving, and the large-opening-degree sliding plug door system is high in security coefficient, small in later-period maintenance work amount, stable in operation, simple in structure and easy to achieve and has a good application prospect.

The invention discloses a collapse rockfall protection net structure with a tough energy dissipation function, and relates to the technical field of tough energy dissipation protection net structures. The structure comprises: a plurality of supporting columns, wherein the plurality of supporting columns are arranged at intervals along a slope supporting track; a plurality of fences which are arranged in the length direction of the supporting columns at intervals, wherein all the fences extend in the interval arrangement direction of the supporting columns; buffering devices which are used for connecting the fences to the supporting columns; and a steel wire mesh which is fixedly arranged on the fences. The buffering devices can conduct telescopic buffering, and the telescopic buffering strength of the multiple buffering devices is configured to be capable of driving the steel wire mesh to approach to be kept in the vertical state after falling rocks are prevented.

The invention discloses a safe and reliable circulating water washing type waste gas treatment system which comprises an upper computer, a plurality of PLC (Programmable Logic Controller) cabinets and a plurality of waste gas treatment devices, wherein the upper computer is connected with the PLC cabinets; the PLC cabinets are connected with the waste gas treatment devices; each waste gas treatment device comprises a pre-filtering component, a water washing component, an induced draft fan and an exhaust component that are sequentially connected by pipelines; each exhaust component comprises a sensor for detecting a gas content, a control unit gating outlets and opening and closing units of the two outlets; the sensors are arranged at inlets of the exhaust components; output ends of the sensors are connected with the control units; and the control units are connected with the opening and closing units. According to the system, the upper computer controls the PLC cabinets, the PLC cabinets remotely control the waste gas treatment devices, and the system is safe and reliable, and can remotely control the organic waste gas treatment devices to improve efficiency.

The present invention discloses a method for greening side slopes. Said greening method includes the following steps: fixing the protective metal net on the side slope required for greening, mixing plant seeds, adhesive and plant-growth material; then making them be attached to the side slope fixed by metal net by adopting blow-spraying mode. The preparation method of said plant-growth material includes the following several steps: (1), firstly, mixing tree bark, wood dust and cattle dung to obtain basal material; adding lime super phosphate and microbial leaven in said basal material, uniformly mixing them and making fermentation so as to obtain plant-growth basal disk material; and (2), uniformly mixing the plant-growth basal disk material, foreign soil and soil penetrating agent so as to form the invented plant-growth material.

The invention belongs to the field of electricity. The invention relates to a magnetic core, in particular to a manufacturing method of a double-power-output energy-taking magnetic core. The manufacturing method of the energy-taking magnetic core is based on the actual situation of engineering application; firstly, the working state of a magnetic core is pre-judged; a calculation process of an inapplicable unsaturated working state in engineering practice is omitted; coefficient simplification calculation is introduced, the influence of process variables such as magnetic core resistance impedance, leakage inductance voltage drop, magnetic core hysteresis loss and eddy current loss in a numerical algorithm and the difference of theoretical calculation and engineering application are compensated through coefficients, a complete output power calculation method is formed, and the method is convenient, simple and convenient to apply. The single energy-taking magnetic core power supply provides two kinds of output power, the application of the energy-taking magnetic core is expanded, the output power of the magnetic core is quantified, the output can be directly applied to a post-stage circuit, a power control circuit does not need to be added, the production cost is reduced, the production efficiency is improved, and the circuit space is saved.

The invention discloses a method of a building architecture applied for system development, which is used to achieve flexible adjusting and user-defined modification of a system, and comprises the following steps: building the architecture of the system, setting a component attribute template, and adding components to the system through the component attribute template. Through using the method, users can freely add the function of the system, adjusts a window of the system, thereby achieving the later system maintenance and the modified user-definability, increasing the efficiency of the system maintenance, reducing the workload of later maintenance of system developers, and improving the application experiencing of the system.

The invention discloses an installation construction technology of an open mounted lightning receiving strip supported by a casing pipe. The installation construction technology comprises the following steps that A, a casing pipe support is manufactured; B, the casing pipe support is positioned; C, the casing pipe support is installed; and D, the lightning receiving strip is installed. According to the scheme of the installation construction technology, compared with the prior art, a supporting column, the casing pipe and an antirust layer are only needed, then manufacturing and forming are achieved, manufacturing is easy, construction is convenient, and good practicability is achieved; the lightning receiving strip is supported and fixed by penetrating through the casing pipe, welding construction between the lightning receiving strip and the supporting column is omitted, meanwhile the processes of antiseptic treatment, finishing coat treatment and the like of a supported point of thelightning receiving strip are further omitted, the construction cost is reduced, the construction work efficiency is improved, and the economic benefits are obviously improved; the later maintenanceworkload is reduced through arrangement of the antirust layer, and the service life of the lightning receiving strip is prolonged; and when being installed, the lightning receiving strip can extend and retract left and right in the casing pipe, the problem of welding prestress caused by welding of the lightning receiving strip and the supporting column is solved, the straightness of the lightningreceiving strip is ensured, and the appearance quality of the lightning receiving strip is improved.

The invention discloses a remote simulation control device. The remote simulation control device comprise a remote control output module, a remote communication input module, a remote metering simulation module, a remote communication module, a first power supply, a second power supply, a third power supply and a fourth power supply. The remote control output module, the remote communication input module, the remote metering simulation module and the remote communication module are arranged in the remote simulation control device, power outage time can be reduced through maintenance and simulation control of secondary equipment at no power failure state, and power supply reliability is enhanced; spare parts are subjected to performance test before putting equipment into use, the equipment can be ensured to stably run, post maintenance workload is reduced, and working efficiency is greatly improved; and with the arrangement of the remote control output module, the remote communication input module and the remote metering simulation module, the functions of remote communication / metering output, remote control input and remote control of a measurement and control device are simultaneously achieved.

The invention provides a loading device for an air duct production line, and the air duct production line. The loading device for the air duct production line comprises a placement rack, storage mechanisms, compression mechanisms and a transmission mechanism, wherein two groups of the storage mechanisms are mutually arranged at intervals and in parallel, and are rotationally arranged at the top end of the placement rack separately; the transmission mechanism is fixed to the top of the placement rack, and capable of forming engagement transmission with one group of the storage mechanisms separately; and two groups of the compression mechanisms are fixed to the top end of the placement rack. According to the loading device for the air duct production line, and the air duct production line, the storage mechanisms are driven through the transmission mechanism to ensure the controllability of a discharge speed for coiled materials, and stacking and bending caused to the raw materials due toexcessive discharge can be avoided. Moreover, any one group of the storage mechanisms can be driven as needed by a group of motors through the transmission mechanism, the original manner of needing one group of motors to drive each group of the storage mechanisms is replaced, the structure of the device is simplified, and the later-period maintenance workload is reduced. Meanwhile, adjustable support radiuses of the storage mechanisms are achieved through expansion-contraction mechanisms, so that the practicability is improved.

The invention provides a method and system for displaying and controlling inflation and deflation of a tire in real time. The method comprises the steps of S1, sensing the tire pressure; S2, regulating and controlling the tire in real time according to the tire pressure. The system comprises a wheel rim solenoid valve and a controller assembly ECU, and the wheel rim solenoid valve is configured tosense the tire pressure and regulate and control the tire in real time according to an operation instruction transmitted by the controller assembly ECU; the controller assembly ECU is configured to receive a signal of the tire pressure sensed by the wheel rim solenoid valve and transmit a signal of the operation instruction for regulating and controlling the tire to the wheel rim solenoid valve.According to the technical scheme, the method and system for displaying and controlling the inflation and deflation of the tire in real time can display and control the tire pressure of the tire in real time, and have the advantages that the system and method are not easily affected by electromagnetic interference, the signals are stable, a pipeline does not need to be under pressure for a long time, the versatility is high, a battery does not need to be installed, and the workload for later maintenance is small.

The invention relates to a plugging agent for plugging petroleum wells, and particularly relates to an efficient urea-formaldehyde resin plugging agent and application thereof. The efficient urea-formaldehyde resin plugging agent comprises the following raw materials in parts by weight: 55-75 parts of urea-formaldehyde resin, 0.01-2 parts of sodium persulfate, 0.1-5 parts of sodium polyacrylate and 5-35 parts of medical stone powder. The plugging agent is used for plugging petroleum wells at a temperature of 30-120 DEG C. When the plugging agent is used, the plugging agent is prepared into mixed liquid according to the weight parts above, the mixed liquid is uniformly stirred and is injected into the stratum, a petroleum well is closed, and reaction is carried out for more than 24 hours. When a production well is plugged by using the plugging agent disclosed by the invention, the later maintenance workload and capital investment of the production well can be greatly reduced; and meanwhile, the plugging agent achieves a uniform, integrated and efficient plugging effect, and is long in period of validity, high in strength and wide in applicable temperature range.

The invention relates to an all-welded box girder combination section constructing method. The method comprises the specific steps that a girder is divided by making the distance length of two sections serve as one novel box girder combination section, plate units of sectional unit parts are manufactured, a girder lower chord is welded to a lower bridge surface steel box, a girder upper chord is welded to an upper bridge surface panel, a transverse bracing system is welded to a girder vertical rod, the girder vertical rod and an inclined rod are welded to the girder lower chord and the girder upper chord, and the novel box girder combination sections are formed; trial splicing is performed on adjacent novel box girder combination sections on a preset trial assembly platform, and anticorrosion coating is performed on the outer surface. All-welded box girder combinations are welded in place according to a construction order on a bridging construction site. According to the method, the girder is designed into the all-welded box girder combination sections, few hanging units are used, durability of the girder is improved, maintaining workloads during the later period are reduced, site construction is simplified, work efficiency is improved, and an installation period is shortened; the appearance is beautiful, and durability is good. The method has been successfully applied to the Shanghai-to-Nantong railway Yangtze river highway-railway dual-purpose great bridge engineering.