58results about How to "Meet the environment" patented technology

The invention discloses a code generation method and device based on a maven plug-in and a freemarker template. The method comprises the steps that data and the template are prepared, namely, .hbm.xml files are written or generated according to a data base design file or a data base table, and the template is written according to the characteristics of items and freemarker template grammar; the maven plug-in is called to carry out the logical operation to generate codes, namely, the maven plug-in which encapsulates arithmetic logic generated by the codes is called, and logic operation and code generation are carried out according to the .hbm.xml files prepared in the first step and freemarker template files; the codes are generated, namely, macro is applied to the code template to generate a target code of an MVC three-layer structure. The code generation method and device based on the maven plug-in and the freemarker template solve the problem that duplicated codes are automatically generated in the developing process, and can be customized under the actual condition according to the template and improve production efficiency; because automatic code generation and a common construction tool maven are bound, the universality and the usability of the device are improved.

The invention relates to a wireless image transmission communication system for an unmanned aerial vehicle and a wireless image transmission communication method. The wireless image transmission communication system comprises a digital camera, a control module and a power module, and is characterized in that the wireless image transmission communication system further comprises a wireless communication module for real-time data transmission with a ground monitoring center, the wireless communication module comprises a reconfigurable high-speed digital modulation unit and a digital transmission transmitter, the reconfigurable high-speed digital modulation unit is used for selecting a digital modulation mode to digitally modulate serial data stream according to the modulation mode of a remote control command of the ground monitoring center, the digital transmission transmitter is used for transmitting data by the aid of microwaves, and the reconfigurable high-speed digital modulation unit comprises a series-to-parallel portion, a sampling control portion and a carrier wave multiplication portion. By adding the reconfigurable multi-mode modulator, modulation modes can be changed in an online manner according to the quality of a signal channel environment, and high-resolution image data can be transmitted in real time even in a severe transmission environment.

The invention discloses a variable-stiffness variable-damping shock absorber based on a magnetorheological damper. The shock absorber is characterized in that an outer cylinder body is glidingly mounted on the outer side of the magnetorheological damper; a spring mounted in the outer cylinder body is connected with the piston rod of the magnetorheological damper; when the magnetorheological damper and the spring vibrate by external pressure, the outer cylinder body slides on the outer side of the magnetorheological damper to change the travel of the whole shock absorber, and meanwhile, the electrification coil of the magnetorheological damper is electrified and the shape of a magnetorheological fluid is changed to change the damping of the shock absorber. According to the shock absorber, the magnetorheological damper is combined with the spring, so that the stiffness and damping of the shock absorber can be changed; the shock absorber is large in travel and can meet the requirements of an environment in need of the shock absorber with large travel.

The invention discloses a treatment method of waste slurry generated by gigging a well and drilling, which comprises the following steps of: separating liquid from scraps to remove sands in waste slurry which is generated by gigging a well and drilling and is reflowed from the well; adding inorganic flocculating agent and water in the sanded-removed waste slurry generated by gigging the well and drilling to dilute, stir and damage stability to obtain cement paste with solid content which is less than or equal to 20%; adding polyacrylamide flocculant into the obtained cement paste to stir and perform a cement paste destabilization reaction; after the cement paste destabilization reaction, separating solid from liquid in the cement paste; and returning filter water to the step of separating liquid from scraps to remove the sands as cleaning proportioned water to recycle and / or return to the step of diluting, stirring and damage stability as water for treating and diluting the cement paste. The method can solve the problem for treating and using the waste slurry generated by gigging the well and drilling, can separate sands from mud and water in the waste slurry generated by gigging the well and drilling, can reach the standard and be comprehensively utilized, has large treatment amount to reach 1000 m<3> / h, can treat the waste slurry on a large scale, thereby being capable of reducing the treatment cost of the system. The method can comprehensively utilize and recycle all the waste slurry generated by gigging the well and drilling.

The invention relates to a big data security analysis platform system based on network security. The big data security analysis platform system comprises a unified collection platform, a basic data storage and processing capability center, an upper layer application data center and a big data list query center, the unified collection platform adopts Kafka as a message management layer of the unified collection platform to achieve flexible docking and adaption to various data source collection and to provide flexible and configurable data collection capability, the basic data storage and processing capability center utilizes the spark and hadoop technologies to provide powerful data processing capability, the upper layer application data center provides highly aggregated statistical data ofan enterprise through the RDBMS / ES, and the big data list query center provides fast query capability of big data by constructing an HBase cluster.

The invention relates to a novel, quick, high-sensitivity, qualitative and quantitative clinical test method which uses a chemically modified functional polymorphic substrate as media and combines inorganic fluorescent semiconductor nano materials (quantum dots) and immunology means. The multi-functional quick fluorescence immunoassay test method using a functional substrate as media and using single color and multi-color quantum dots as a mark is suitable for a single or compound qualitative and quantitative test of various hormone, protein, nucleic acid and pathogens. Compared with traditional enzyme-linked immunoassay and colloidal gold test paper, the multi-functional quick fluorescence immunoassay test method has the advantages of being simple, quick, high in sensitivity, long in storage time and the like. The multi-functional quick fluorescence immunoassay test method can meet requirements of different testing conditions and samples, can conduct the single or compound qualitative and quantitative test on different antigens on the same substrate media at the same time, and has great potential on aspects of clinical applications.

The invention relates to a parallel multi-winding motor, which comprises a stator and a rotor, wherein the stator and the rotor are arranged in a casing. The parallel multi-winding motor is characterized in that a plurality of sets of functional windings are wound on the stator in parallel. When all sets of functional windings are connected with an external driver or an alternating current power supply, all the functional windings independently enable the motor to run normally. When a motor structure system is operated, if one set of the windings breaks down, the other windings can maintain normal operation of the system under the condition that the fault winding is not involved in, thereby greatly improving reliability and continuous operation ability of the system. When the parallel multi-winding motor is applied to a high-power motor, a system driving mechanism is simplified, and reliability is improved greatly.

The invention discloses a submerged arc welding flux for welding ultra-low temperature high manganese steel. The flux is prepared by the following components, by weight: 3-6 parts of SiO2, 30-50 partsof MgO, 30-40 parts of Al2O3, 10-20 parts of CaF2, 3-10 parts of TiO2, more than 0 and not more than 3.0 parts of Fe2O3, more than 0 and not more than 0.020 part of S and more than 0 and not more than 0.015 part of P. Compared with the prior art, the flux has the advantages of good welding processability, excellent slag removal, beautiful shape and better mechanical performance. The welding wireand flux of the invention can replace a nickel-based base material and welding material when welding ultra-low temperature high manganese having a manganese content of 13% or more and can meet the ultra-low temperature requirements of -196 DEG C.

The invention discloses a MAX-DOAS based vertical profile inversion algorithm used for measuring aerosol and trace quantity pollution gas. According to the MAX-DOAS based vertical profile inversion algorithm used for measuring aerosol and trace quantity pollution gas, Lambert-Beer's law is adopted, QDOAS is adopted for calculating ultraviolet wave band and visible wave band O4 difference slant column intensity, and difference slant column intensities of trace quality gas including nitrogen dioxide, sulfur dioxide, formaldehyde, nitrous acid, and glyoxal; different wave band O4 DSCD inversion of corresponding wave band aerosol profile is carried out; the aerosol optical thickness obtained through inversion and real aerosol optical thickness measured using a sun photometer are extracted andcompared, and the hour average result of trace quality gas profile bottom layer concentration is extracted, and is compared with nationally controlled station ground corresponding gas concentration. The MAX-DOAS based vertical profile inversion algorithm is used for solving foundation passive remote sensing observation vertical profile inversion algorithm problems, realizing rapid, continuous, high efficiency monitoring on atmosphere aerosol and polluted gas space-time change characteristics, and satisfying requirements on environment pollution study and monitoring.

The invention relates to an intelligent device for routing inspection of tunnel cable faults and automatic repair of insulation faults, and belongs to the technical field of tunnel cables. The intelligent device includes a device car body, travelling wheels, a 360-degree panoramic camera, a thermal infrared imager, a supporting rod, an LED head lamp, an air monitoring module, a base, a repair control arm, a supporting arm, an executive arm, an insulation repair assembly and a cable repair piece storage box. According to the intelligent device for routing inspection of the tunnel cable faults and automatic repair of the insulation faults, an insulation repair module is additionally arranged, and the insulation faults can be timely repaired; a way of a mechanical arm heating cable repair pieces to wrap insulation fault points is specifically adopted, meanwhile, the cable repair pieces can be clamped to the mechanical arm automatically without replacing the repair pieces manually, and themultiple fault points can be repaired through once routing inspection; and meanwhile, the basic functions of a cable tunnel routing inspection device such as gas environment monitoring inside a tunnel and real-time data transmission to mobile terminals can be met.

The invention discloses a method for estimating the number of radio frequency tags based on geometric distribution, which comprises the following steps: A, a plurality of readers are controlled by utilizing time synchronization technology, and meanwhile wireless signals are simultaneously transmitted to a to-be-estimated tag collection within the scope of reading. B, after a tag receives the wireless signals, a corresponding time slot reply reader is determined. C, the reader generates the estimation vector and performs analysis and calculation to the estimation vector, so that the estimation value of the number of tags in the to-be-estimated tag collection is obtained. According to the method, the accurate estimation of the number of tags can be obtained by using only few time slots, so that the requirements of the mobile network environment and other scenes sensitive to time are satisfied, and meanwhile, when the estimation of the number of tags is performed, strict and non-redundant partition performed to the to-be-estimated tag collection is not required, that is, tag sub-collection which is covered with each reader can be overlapped for a part or not be overlapped, the final estimation accuracy is not affected, and the method is suitable for actual situations better.

The invention discloses an antishock ecological spur dike, and belongs to the technical field of hydraulic engineering and water transportation. The antishock ecological spur dike is a channel improvement structure, and comprises a dam body and a dam head constructed on a cushion layer; antishock steel plates are fixed on the upstream face sides of the dam body and the dam head; and the dam body is provided with multiple holes positioned below a designed water level. The direct scouring of water currents to the dam body can be reduced, so that the stability of the dam body is maintained, and the channel operation and maintenance are facilitated; the plant growth is facilitated; proper habitats can be provided to fishes and demersal organisms; the use level of stones can be reduced; a lot of engineering investments can be saved; and in particular, river currents with more materials and deeper water are more prominent in benefit. In sum, the stability of the dam body can be improved; meanwhile, the surrounding ecological environments of the dam body can be improved; excellent living environments are created for such river organisms as fishes; and growth adhering conditions are provided to plants to meet the demands of engineering construction and environmental protection.

The invention discloses an inland-river ecological regulation groin system. The inland-river ecological regulation groin system comprises a guide groin, a plurality of bank-protection short groins aswell as a plurality of water-retaining groins which are in one-to-one correspondence to the bank-protection short groins, which are sequentially arranged from upstream to downstream, wherein one end of the guide groin is connected with a river bank, the other end of the guide groin extends into a river channel to form certain angle with the river bank, and the groin head points to the downstream;each water-retaining groin is arranged offshore, is positioned on the middle of a channel, is in integrally of a U-shaped structure with a U-shaped opening pointing to the downstream, and is composedof an arc-shaped groin head and a two-section linear groin body, the groin body close to one side of main flow is arranged along the flow direction of the main flow, and the groin body at the shore side is parallel to the river bank; the bank-protection short groins are connected with the river bank on plane to form an T shape; the water-retaining groins and the corresponding bank-protection shortgroins are arranged in the forms of opposite-mouth groins, and water-passing branches are formed between the water-retaining groins and the bank-protection short groins. The inland-river ecological regulation groin system can meet navigation needs, improves channel floodwater capacity, and also can create a good habitat environment for animals and plants.

The invention discloses an air sterilizing and purifying system. The system comprises a shell; an air outlet is formed in the top of the shell; a liquid crystal display control screen and a probe detecting hole are arranged on the front surface of the shell; an air returning hole is formed below the probe detecting hole; an ultraviolet sterilizing lamp is arranged at the bottom end of the inner side of the shell; a primary filter, a medium-efficiency filter and a high-efficiency filter are sequentially arranged over the ultraviolet sterilizing lamp; an active carbon filter is arranged between the primary filter and the medium-efficiency filter; a supporting cross bar is arranged between the medium-efficiency filter and the high-efficiency filter; a fan bracket is arranged on the supporting cross bar and used for fixing a fan. The air sterilizing and purifying system disclosed by the invention is simple in structure, convenient to install, capable of disinfecting and sterilizing air, filtering and removing dust, also capable of effectively removing peculiar smells, low in electric energy usage, low in noise and convenient to move.

The invention relates to a single-core optical cable for indoor and outdoor jumper wires and a preparing method of the single-core optical cable for the indoor and outdoor jumper wires. The single-core optical cable comprises an optical fiber, a tightly-wrapping layer, a second water-resistant reinforcing layer, an inner protection layer, a first water-resistant reinforcing layer and an outer protection layer. The method for preparing the single-core optical cable comprises the steps that a curved insensitive optical fiber material is selected and manufactured into the optical fiber; the outer surface of the optical fiber is wrapped in the tightly-wrapping layer through a plastic extruding machine; the outer surface of the tightly-wrapping layer is wrapped by the second water-resistant reinforcing layer; the outer surface of the second water-resistant reinforcing layer is wrapped in the inner protection layer through the plastic extruding machine; the outer surface of the inner protection layer is wrapped by the first water-resistant reinforcing layer; the outer surface of the first water-resistant reinforcing layer is wrapped in the outer protection layer through the plastic extruding machine, and therefore the single-core optical cable for the indoor and outdoor jumper wires is obtained. The single-core optical cable for the indoor and outdoor jumper wires is greatly improved in structure and can be generally used in cooperation with regular jumper wire parts so that the good generality of the single-core optical cable can be achieved, the using requirements for the long distance, an outdoor low-temperature environment and repeatedly dragging can be satisfied, a fire source and water vapor can be effectively blocked and the damage caused by rodents can be prevented.

The invention discloses a construction area survey and calculation method and a system, belonging to the technical field of building construction, which comprises the following steps of: using an unmanned aerial vehicle to investigate the early construction of a highway and a railway, investigating the early demolition area, and obtaining the surrounding environment of the area to be constructed and the building conditions to be demolished. Using BIM software to establish the BIM model of the area to be constructed, the BIM model and the surrounding environment model of the area to be constructed are matched in space, and the virtual reality scenes that can be experienced are obtained, and the removal evaluation and preliminary construction investigation are carried out on the basis of thevirtual scene. The invention can quickly and accurately carry out multiple surveys and calculations on the construction area to be constructed during the surveying period, and meets the requirementsof large outdoor construction area, changeable construction environment and complex surveying planning for multiple times.

An embodiment of the invention discloses a distributed power generation investment and distribution network planning optimization method in a deregulated environment. The method includes model construction and an improved multi-objective shuffled frog leaping algorithm. The model construction includes an objective function, a constraint condition and uncertainty processing. The improved multi-objective shuffled frog leaping algorithm includes a shuffled frog leaping algorithm mechanism and steps. According to the method, joint optimization of distributed power generation investment and distribution network construction planning is studied, and a profit distribution coefficient is introduced in constructing an objective function process to achieve a win-win goal. According to the method, DNO can encourage investment and planning of various distributed power generation technologies more effectively, and uncertainties of various parameters in the future are also considered, which can helpplanners to make plans more accurately.

According to a low-temperature falling ball impact testing machine, a placing part comprises an experiment table of a disc structure, and a plurality of sample seats arranged around the circle centerare arranged on the experiment table. The impact part comprises a fixed plate mounted at the upper end of the freezing box, and an impact column and a supporting column are arranged on the fixed plate. A lifting motor table is fixedly arranged at the top ends of the impact column and the supporting column, a lifting motor is arranged on the lifting motor table, a rotating shaft of the lifting motor is horizontally arranged, and two driven wheels parallel to the rotating shaft of the lifting motor are arranged on the two sides of the rotating shaft of the lifting motor. The impact column and the supporting column are both hollow and are of an up-down penetrating structure, and a traction rope is arranged in the supporting column. An electromagnet and a steel ball are arranged in the impactcolumn, and a placing hole for placing the steel ball is formed in the impact column. The traction rope bypasses the driven wheel and a rotating shaft of the lifting motor to be connected with the upper end of the electromagnet. A punched hole for communicating the fixed plate with the upper wall of the freezing box is formed in the lower end of the fixed plate, and is over against the upper end of the sample seat.

The invention relates to an Nd, Er:GSAG laser crystal and its preparation method. The chemical formula of the laser crystal is Nd<3+>, Er<3+>:Gd3Sc2Al3O12, which can be abbreviated as Nd, Er:GSAG. The molecular formula is Nd3xEr3yGd3(1-x-y)Sc2Al5O12, wherein x is greater than or equal to 0.001 and is smaller than or equal to 0.2, and y is greater than or equal to 0.005 and is smaller than or equal to 0.5. The preparation method includes: taking Nd2O3, Er2O3, Gd2O3, Sc2O3 and Al2O3 as raw materials, mixing them according to a required proportion, and conducting briquetting, then acquiring crystal growth initial raw materials by a solid phase technique, and carrying out orientated growth by means of Czochralski technique, temperature gradient technique, heat exchange technique, Bridgman technique or kyropoulos technique, thus obtaining the Nd, Er:GSAG laser crystal. As a sensitizing ion, Nd<3+> can transfer the absorbed energy to Er<3+> ions in the crystal, thus enhancing the pumping efficiency of laser near 2.7-2.9 micrometers of Er:GSAG. The laser in the wave band has important application in biomedical treatment, optical parametric oscillation, optoelectronic countermeasure and other fields.

The invention discloses a high corrosion-resistant Portland cement early strength agent and a preparation method thereof. The high corrosion-resistant Portland cement early strength agent comprises the following components in part by weight: 20-60 parts of gypsum, 10-20 parts of quicklime, 20-40 parts of sulfate, 10-30 parts of alcohol amine compound and 1-20 parts of calcium formate. The preparation method comprises the following steps: firstly uniformly mixing the gypsum, the quicklime, the sulfate, citrate and the calcium formate in a mixing machine in proportion, then adding the alcohol amine compound, grinding together in a vibrating mill and sieving to obtain the high corrosion-resistant Portland cement early strength agent. The high corrosion-resistant Portland cement early strengthagent and the preparation method thereof have the benefits that the targeted design is performed on a high corrosion-resistant Portland cement system, and the problem of no targeted early strength agent for existing high corrosion-resistant Portland cement is solved by the utilization of an inorganic and organic synergistic mechanism; in addition, the early strength agent does not contain corrosive ions such as chloride ions, has no influence on the use of the high corrosion-resistant Portland cement and can meet the needs of various erosion environments and construction conditions.

The invention discloses an aging-resistant high-toughness polyformaldehyde material and a preparation method thereof, and relates to the technical field of high polymer materials, the aging-resistanthigh-toughness polyformaldehyde material comprises the following components by mass: 80-95% of polyformaldehyde resin (POM); 1%-20% of a toughening agent; 0.2-1% of an antioxidant; 0.1%-2% of an anti-UV agent; and 0.2%-1% of a nucleating agent. The aging-resistant high-toughness polyformaldehyde resin material has the advantages of high toughness, excellent aging resistance and favorable mechanical properties, can satisfy the requirements of outdoor products for external environment resistance, and is suitable for manufacturing antifriction wear-resistant parts, transmission parts, chemical engineering, instruments and other parts.

The invention provides a plenum chamber with the purification function, the disinfection function and the sound absorption function. The plenum chamber comprises a plenum chamber body, a purification and disinfection device and sound absorption materials, wherein the plenum chamber body is a cuboid, any one side of the plenum chamber body can be connected with an air duct as needed, the mode of connection between the plenum chamber body and the air duct is the same as the mode of connection between a common air supply and discharge plenum chamber and the air duct, the purification and disinfection device is firmly installed in the plenum chamber body and between an air inlet and an air outlet, and the sound absorption materials are evenly attached to the outer wall of the plenum chamber body. The plenum chamber with the purification function, the disinfection function and the sound absorption function has the advantages that the plenum chamber with the purification function, the disinfection function and the sound absorption function is used for replacing the section with the purification function, the section with the disinfection function and the section with the sound absorption function in a combined air treatment unit, the length of the combined air treatment unit is reduced, the height of a machine room is sufficiently used, and the purification and disinfection device and the sound absorption materials are reasonably combined and arranged in the plenum chamber body. When the plenum chamber with the purification function, the disinfection function and the sound absorption function is applied, the size of the combined air treatment unit can be reduced, and the airflow stabilizing function, the sound absorption and noise reduction function, the disinfection function and the air purification function are achieved.

The invention provides a screw feeder easy to clean. The screw feeder comprises a hopper, a material conveying bin, a material conveying drive motor and a discharging port. The material conveying drive motor is connected with the tail end of the lower portion of a spiral rotating shaft in the material conveying bin, and drives the spiral rotating shaft to rotate. The spiral rotating shaft is of a hollow structure, and an inner sleeve of a hollow structure is coaxially sleeved with the spiral rotating shaft. The outer diameter of the inner sleeve is equal to the inner diameter of the spiral rotating shaft, and an inlet-outlet opening communicating with the interior of the inner sleeve is formed in the upper portion of the inner sleeve. A plurality of shaft core holes are vertically distributed in a shaft core of the spiral rotating shaft. Inner sleeve holes are distributed in the positions, corresponding to the shaft core holes, of the inner sleeve. The parts, where the inner sleeve holes are not distributed, on the inner sleeve can close the shaft core holes at the same time under a certain nesting state. According to the screw feeder, equipment can be efficiently cleaned under the condition that detaching is not conducted.

Systems and methods for making, engineering and processing of degradation-promoted polymers in accordance with their end-use applications and environmental conditions are provided. The systems and methods include incorporating, blending and compounding the degradation-promoting agent(s) into a polymeric material. The resulting degradation-promoted polymeric material can be molded to create a desired end use product that, when exposed to an application-specific environment, the degradation rate of the degradation-promoted polymer can be enhanced compared to the degradation rate of the input polymer(s) without the incorporated degradation-promoting agents.

The invention belongs to the technical field of urban garbage management, and particularly relates to an intelligent garbage management system. The intelligent garbage management system comprises a field management terminal, wherein the field management terminal comprises a plurality of intelligent terminals; an output end of the field management terminal is electrically connected with an input end of a GPRS wireless network; an output end of the GPRS wireless network is electrically connected with an input end of a monitoring center; an output end of the monitoring center is electrically connected with an input end of the Internet; and an output end of the Internet is electrically connected with an input end of a remote application device. The intelligent garbage management system plans an optimal garbage collection route and a garbage collection time table, utilizes historical data for prediction and analysis to ensure that a strategy is formulated in advance and related informationof garbage container distribution is provided, realizes the purposes of intelligent environmental sanitation management and maximum energy conservation, satisfies the requirements for urban daily environmental sanitation or emergency management, significantly improves the garbage logistics collection efficiency , saves cost, and achieves energy conservation and emission reduction.

The invention relates to an outdoor full-shaping adjustable multifunctional shoe. The internal structure of a sneaker can be adjusted and changed in time according to different sports forms in outdoorsports; the basic requirement of adapting to multiple motions is met; the shoe comprises a shoe body, wherein the shoe body comprises an upper surface, a lining and a shoe inner cavity; an outsole and a heel are arranged at the bottom of the shoe body. A middle bottom plate is arranged on the outsole; a foot arch supporting pad is arranged in the shoe inner cavity between the middle bottom plateand an insole; a toe circumference adjusting belt, a plantar circumference adjusting belt, a tarsal circumference adjusting belt and a heel circumference adjusting belt are all arranged between the middle bottom plate and the insole, penetrate through the space between the middle bottom plate and the insole, pass through the inner cavity of the shoe and are attached to the lining; the foot arch supporting pad is connected with the tarsal circumference adjusting belt, a telescopic plate and a bearing plate are arranged between the outsole and the heel, locking screws are arranged on the two sides of the heel and connected with a transmission mechanism, and the transmission mechanism is connected with the telescopic plate. A tightening belt is arranged at the heel and is connected with an elastic belt arranged on one side of the upper surface.

The invention discloses a lifting intelligent delivery truck, including a frame assembly, a wheel assembly, a drive assembly, a steering assembly and a control assembly. A container is arranged on theframe assembly, the frame assembly is provided with a lifting assembly and a wheel track adjusting assembly, the lifting assembly is used for supporting and lifting the container, the wheel track adjusting assembly is used for adjusting the distance between front wheels and rear wheels in the wheel assembly, and when the wheel track adjusting assembly adjusts the distance between the front wheelsand the rear wheels, the lifting assembly completes the lifting operation of the container. The invention has the advantages of simple and compact structure, high degree of intelligence, strong adaptability and the like.

The invention discloses an access network and indoor wiring optical cable, and relates to the technical field of communication optical cables. From the outside to the inside, the optical cable sequentially comprises an external sheath, an aluminum belt which is disposed in the length direction of the optical cable, a water-blocking tape which is disposed in the length direction of the optical cable, a reinforcing element, the interior of which is provided with two rip cords which are disposed in the length direction of the optical cable, an internal sheath, and a cable core which comprises at least one optical unit and a nonmetal reinforcing part wrapping the periphery of an optical element. The optical unit comprises a micro-beam tube and a plurality of optical fibers disposed in the micro-beam tube. The interior of the micro-beam tube is provided with a flame-retardate water-blocking element. According to the invention, the external sheath and the aluminum can be peeled off easily from the rip cords. When the optical cable is connected to a splice box or indoors, the parts outside the internal sheath can be removed, and the indoor connection and indoor wiring can be met. The application range of the optical cable is enlarged, and the construction difficulty and cost of optical cable home entry are reduced. Moreover, the construction efficiency of optical cable home entry is greatly improved.

The invention discloses an oil conveying pipeline on-line density measuring device. A process main pipeline [6] of a constant-temperature electric heat tracing and thermal insulation device [17] is connected in series to a pipeline to be tested through a flange (1) [1] and a flange (2) [35] at the two outer ends, and is sequentially provided with parallel filter (1) [2] and filter (2) [38] and a differential pressure transmitter [10], a flow switch [11], a serial process valve (6) [23], a bypass manual sampling valve [14], a bypass on-line verification port (1) [8], a bypass in-situ pressure gauge [12], a bypass drainage pipeline [7], a sampling pump [3], a serial process valve (7) [24], a bypass on-line verification port (2) [37], a bypass thermal expansion safety valve [5], an on-line densimeter [4], a bypass exhaust valve [15], a bypass drainage pipeline [7] and an intelligent pressure transmitter [9] which are arranged in front of and behind the filters from the inlet end; and an instrument junction box [16] is connected with an SCADA (Supervisory Control And Data Acquisition) system.

The invention discloses a circulating fluidized bed boiler ignition device with natural gas serving as fuel. The ignition device comprises an ignition combustor, a natural gas nozzle and a metal hose. The ignition device is characterized in that a body of the natural gas nozzle is a hollow stainless steel bar in the shape of a cylinder and a circular truncated cone; the circular truncated cone part is a sprayer, and natural gas spray holes are evenly distributed in the circular truncated cone part; the tail end of the cylinder part is connected with a short section through a thread structure, the other end of the short section is in threaded connection with a section of stainless steel pipe, the other end of the stainless steel pipe is connected with the front end of the metal hose in a sealed manner through a connecting flange, and the other end of the metal hose is connected with a natural gas input pipeline; and the body of the natural gas nozzle and the short section are integrally arranged in the ignition combustor. Natural gas is adopted for ignition, boiler ignition cost is reduced, the boiler ignition maintenance workload is reduced, economic benefits are increased, the low-carbon emission in the ignition process of the boiler of the type is achieved, and the phenomena of carbon deposition and blockage of the nozzle are eliminated.