418results about How to "Well laid" patented technology

A basement engineering waterproof and drainage method is provided. The wall footing of the outside wall in basement engineering is embedded in watertight or micro-watertight soil rock layer or cement soil layer. The wall footing intercepts water by a thin-part structure. The cushion of the basement engineering soleplate and the falling layer of the top board are composed of combined water-proof layers. The late poured band, the movement joint and the horizontal construction joint at the lower part of the outside wall are treated by a water-proof structure combined with waterproofing measures. The basement engineering is provided with a drainage system. The groundwater and surface water at the soleplate are drained into city drainage pipelines via a soleplate part of the drainage system. The rainwater of overburden layer bottom of the top board is then drained into city drainage pipelines via the indoor part of the drainage system. The invention is designed by adopting a one-body method of arranging the basement engineering waterproofing, drainage and anti-floating as well as underground engineering space enclosing structure and pipelines, thereby shortening the construction period, reducing the engineering cost, increasing the durability and reliability of underground building space enclosing structure and waterproof layer as well as pipelines.

The invention relates to a production method for an environment-friendly soilless lawn carpet, which mainly comprises the following steps: laying a waterproof layer, nonwoven fabric, a wadding fiber layer and a nutrition substrate layer in sequence; seeding grass seeds, coating with the nonwoven fabric and then laying vermiculite or zeolite particles; and finally periodically watering and fertilizing during the incubation period. The lawn carpet produced by the invention has short lawn forming time, labor conservation, low labor intensity, low management cost, high lawn purity, no weed, complete root system, good grass quality, uniform thickness, easy survival after transplantation, convenient management, and reeling and cutting property, and overcomes the defects of the prior lawn such as bad applicability and easy rupture. The produced lawn carpet has the advantages of long green period, fresh and green color, strong resistance, light mass, degradability, convenient maintenance convenient transportation and the like, and can be widely applied to the afforestation or the decoration of public places, airports, office buildings, residential building roofs and the like.

The invention discloses an artificial lawn and a fabrication process thereof. The lawn comprises a soil basal layer, a warp knitting grid net paved above the soil basal layer, and fiber grass clusters knitted on the warp knitting grid net, wherein the warp knitting grid net is in a grid structure which is formed by interlacing warps and wefts, natural grass is inserted into grids by the warp knitting grid net, and grass roots of the natural grass are planted in the soil basal layer; the warps and the wefts are all grass silk yarn harnesses knitted and twined by fiber grass yarns, and the grass roots of the fiber grass clusters are knitted in the grass silk yarn harnesses. The process comprises the steps: producing the fiber grass yarns; arraying a plurality of fiber grass yarns side by side, then, knitting the grass yarns into a fried dough twist grass yarn harnesses, and knitting the grass yarn harnesses into the warp knitting grid net; building the soil basal layer on the ground; paving the knitted warp knitting grid net above the soil basal layer; inserting or planting the natural grass in the warp knitting grid net. The artificial lawn and the fabrication process thereof have the benefits that materials, such as base fabrics and mucilage glue, are not needed, so that the economic cost is reduced; the natural grass is planted in the grid, so that the artificial lawn and the fabrication process thereof are more real and have strong flexibility.

The invention provides a distributed optical fiber positioning structure and method used for long-distance monitoring and in particular relates to a distributed optical fiber positioning interference technology based on wavelength division multiplexing (WDM). The interference technology is characterized in that two rays with different wavelengths are injected into the same sensing optical fiber, are transmitted to the port of the optical fiber, are separated by a WDM device and respectively reach own reflecting terminals along own independent optical fiber paths; and two optical waves respectively form different interferences. The disturbance position information is obtained by comparing the spectrum characteristics obtained by the two interferences, of phase signals. The structure and the method have the following advantages: the structure is simple; the rear end does not have special requirements for signal processing; and by comparing the spectrum characteristics to obtain the position information, the impact of disturbing signal amplitude variation on detection is eliminated, the average position value can be obtained by utilizing a plurality of frequency points, thus obtaining high positioning precision.

The invention relates to a method for comprehensively treating construction waste, which comprises the following steps of: 1. disinfecting the construction waste to be treated by adopting a chlorine dioxide disinfectant; 2. loading the construction waste obtained from the step 1 to a hopper and conveying to a sorting platform to sort out impurities; 3. feeding the sorted construction waste to an edge-type crusher through a plate feeder to crush initially; 4. feeding the initially crushed construction waste to a hopper of an impact crusher after magnetic separation by a magnetic separator and crushing the construction waste finally by the impact crusher; 5. screening and peeling out sandstone materials from concrete and feeding the sandstone materials after being washed by a washer to a coarse aggregate bin, wherein the aggregate separated from the washed fine powder washed is used as raw materials of dry mortar or ready mixed mortar or three-hole brick of concrete. The invention ensures that the construction waste resources are utilized comprehensively, and the ordering management, the resource management and the harmless treatment of the construction waste are achieved, thereby achieving the purposes of saving land and reducing secondary pollution.

The invention discloses an indoor wallpaper laying device, which comprises a base plate; a first hydraulic cylinder is fixedly connected to the center of the upper surface of the base plate, and a lifting plate is connected to the first hydraulic cylinder through a piston rod; the upper surface of the lifting plate is slidingly connected to a Moving frame; the moving frame is rotatably connected with a wallpaper roller; behind the wallpaper roller is a glue roller; on the right side of the glue roller is a glue spraying device; between the glue roller and the wallpaper roller there is a wallpaper cut-off device. The present invention realizes the uniform and high-efficiency smearing of wallpaper glue by being provided with a glue hair roller and a glue spraying device, and is convenient for wallpaper laying; On the wall, the air bubbles between the wallpaper and the wall are squeezed out, and the glue is fully spread at the same time, ensuring the sticky quality and flatness of the wallpaper, and improving the work efficiency and quality of wallpaper laying.

The invention provides a heat-preservation moisture-preservation life-preserving device for tunnel lining concrete and a construction method thereof. The life-preserving device comprises a moisture-preservation layer, an electric heating layer and an air inflation heat insulating layer which are paved in sequence from inside to outside in sequence on the surface of a lining. The air inflation heat insulating layer is placed on a trolley frame. After the air inflation heat insulating layer is inflated with air, the heat insulating layer, the electric heating layer and the moisture-preservation layer are tightly attached and are tightly attached to the outer side of the lining. Through the effect of the moisture-preservation layer and the electric heating layer, the life-preserving effect of heat preservation and moisture preservation on lining concrete is achieved. The construction method comprises the steps that the air inflation heat insulating layer, the electric heating layer and the moisture-preservation layer are paved in sequence on a steel pipe of a trolley, the height of a trolley supporting steel frame and the length of an arc steel frame are adjusted, and accordingly the moisture-preservation layer is attached to the surface of the lining concrete; the air inflation heat insulating layer is inflated with air and is expanded, the electric heating layer is electrified and heated, and moisture-preservation heat-preservation maintaining is carried out on the lining concrete; and when set maintaining time is over, heating is stopped, and maintaining is over.

The invention discloses a bridge health monitoring system based on the Brillouin distributed optical fiber sensing technology. The system mainly comprises an optical fiber sensing system, a data acquisition system, a data communication and transmission system, a data analysis and processing system, and an evaluation and alarm system. The data acquisition system is used for intelligently collecting the optical signal power outputted by the optical fiber sensing system. The collected data is transmitted to the data communication and transmission system through a wireless network or special network. The data communication and transmission system remotely transmits the collected data to the data analysis and processing system. The data analysis and processing system analyzes and processes the received data, obtains monitoring information, and presents a monitoring result. The evaluation and alarm system is responsible for evaluating a monitoring result and emits alarm information timely if the result exceeds a threshold. The system can accurately measure the stress, strain, damage and other information of each point along an optical fiber, thus the obtainment cost of unit information is reduced greatly, the bridge damage and deterioration can be monitored in real time, and the alarm is emitted timely.

The invention discloses cable laying and installation cutting and peeling equipment, which comprises a work bench. The four corners of the lower end surface of the work bench are respectively and fixedly connected with a supporting leg through a screw; the lower end of each supporting leg is equipped with a universal wheel; one side of the upper end surface of the work bench is fixedly connected with support bases 1 and support bases 2 through screws; the support bases 2 are located at the side, close to the center of the work bench, of the support bases 1; the number of the support bases 1 and the number of the support bases 2 are two; a fixation shaft 1 is rotatably connected between the two support bases 1 through a rolling bearing and fixation shafts 2 are rotatably connected between the two support bases 2 through rolling bearings; the rod body outer walls of the fixation shaft 1 and the fixation shafts 2 are fixedly connected with a pay-off roller and a conveying roller through screws respectively; the two fixation shafts 2 are symmetrically arranged at the upper and lower ends of the support base 2; the back sides of the two fixation shafts 2 pass through the support bases 2 and are rotatably connected through a gear set; and the back end of the rear support base 2 is provided with a servo motor 1.

The invention relates to the field of intelligent charging technologies, and provides an AGV (automatic guided vehicle) wireless charging system and a charging method implemented by the same. By the aid of the AGV wireless charging system and the charging method, the shortcoming that vehicles are difficult to automatically work for a long term due to low automation degrees of existing AGV charging modes can be overcome. The AGV wireless charging system comprises a vehicle charging device and a ground charging device. The vehicle charging device comprises a navigation device, a charging module and a master controller; the navigation device is used for acquiring position information and attitude information of vehicles; the charging module is used for detecting electric quantity information of batteries of the vehicles and transmitting charging or charging stopping instruction information to the ground charging device; the position information, the attitude information and the electric quantity information can be received and processed by the master controller, the vehicles can reach charging positions of the ground charging device or can return working positions under the control of the master controller according to the information, and the instruction information can be transmitted to the ground charging device by the charging module under the control of the master controller according to the information; the ground charging device is used for receiving the instruction information and outwardly transmitting power according to the instruction information.

The invention relates to a dam-type filling hydraulic bracket in a mined-out region. The dam-type filling hydraulic bracket comprise a top beam, a tail beam, a bracket pedestal, a hydraulic support upright post and a four-connecting rod mechanism, wherein the rear end of the bracket pedestal is provided with a baffle plate pedestal; the baffle plate pedestal is provided with a traction jack of which the front end is hinged with the bracket pedestal together; the rear end of the baffle plate pedestal is hinged with a baffle plate in which a telescopic insertion plate is arranged; the back of the front end of the telescopic insertion plate is fixed with an insertion plate jack of which a pedestal is hinged on the baffle plate pedestal; the back of the baffle plate is hinged with a baffle plate jack of which a pedestal is hinged on the baffle plate pedestal; the baffle plate jack can erect the baffle plate; flexible waterproof cloth extending into a soleplate and two lanes of a working face is attached to the inner sides of the baffle plate and the telescopic insertion plate and is paved from top to bottom; the baffle plate jack can control the baffle plate to rotate back and forth and can keep the baffle plate still when the bracket is removed to ensure that a filler has enough time to be solidified and molded; and after a filling body is solidified, the baffle plate is pulled again to realize the parallel operation of mining and filling. The dam-type filling hydraulic bracket has the advantages of simple structure, high working efficiency, and capability of realizing the parallel operation of filling and mining.

In a wire-processing device, the wire executes turns through being pulled out of a drum. The leading wire-end is held by a gripper of a loop-former. A wire that has been cut to length is held at its leading and trailing ends by an untwisting unit, the wire having before the untwisting operation a doubled-backed loop. A transfer unit takes the leading and trailing ends from the loop-former and passes the wire to the untwisting unit. After the untwisting operation, the transfer unit feeds the wire-ends to the processing units that process the wire-ends. A bundling unit takes the processed wires from the transfer unit, the bundling unit forming a wire bundle with the wires. With the untwisted wires, the wire bundle has neither doubled-back loops nor knots.

The invention discloses a straining beam cable rod dome structure and a construction method of the straining beam cable rod dome structure. The straining beam cable rod dome structure comprises radial straining beams, circumferential straining beams, stay cables, pressing rods, annular cables, outer pressing rings and staining beam hinges, wherein different shapes and different sizes of triangular units are formed by the radial straining beams and the circumferential straining beams; the triangular units are connected to each other and share one edge to form a straining beam grid; connecting positions of the triangular units stretch downwards to form the pressing rods; each stay cable is connected with the lower ends of the pressing rods arranged at the inner sides of every two adjacent rings and the upper end of the pressing rod arranged at the outer side nearest to the stay cable, or is connected with the lower end of the pressing rod arranged at the outmost ring and the outer pressing rings; the annular cables are connected with the lower ends of the pressing rods in the same ring; the straining beam hinges are arranged at the end parts or the middle parts of the radial straining beams and the circumferential straining beams in the straining beam grid; the straining beam grid, the outer pressing rings, the pressing rods and the stay cables are mutually hinged. The invention also provides the construction method for low-altitude assembly and high-altitude tension forming. The invention provides a space tension structure for paving rigid roof materials, and construction is carried out by adopting an integrated pulling and lifting mechanism expansion method.

A multilayered wound dressing which is two-dimensional and has a peripheral edge is provided that includes at least one hydrophobic antimicrobial layer, at least one absorbent layer which includes a water-containing hydrogel, and a covering layer. Starting from the edge of the wound dressing, at least one incision is formed, which partially separates the wound dressing.

In a wire-processing device, the wire executes turns through being pulled out of a drum. The leading wire-end is held by a gripper of a loop-former. A wire that has been cut to length is held at its leading and trailing ends by an untwisting unit, the wire having before the untwisting operation a doubled-backed loop. A transfer unit takes the leading and trailing ends from the loop-former and passes the wire to the untwisting unit. After the untwisting operation, the transfer unit takes the leading and trailing ends of the wire from the untwisting unit and feeds the wire-ends to the processing units that process the wire-ends. A bundling unit is provided after the processing units unit and takes the processed wires from the transfer unit, the bundling unit forming a wire bundle with the wires. With the untwisted wires, the wire bundle has neither doubled-back loops nor knots.

The invention provides a T-shaped connection structure of a composite material laminboard, comprising a connecting bottom plate, a honeycomb laminboard and a T-shaped reinforcing block, wherein the honeycomb laminboard is provided with a groove the shape of which is same with the shape of the upper end of a web of the T-shaped reinforcing block; the upper end of the web of the T-shaped reinforcing block is inserted into the groove; and a wing rafter of the T-shaped reinforcing block is in glue joint with the connecting bottom plate. The T-shaped connection structure also comprises two waveform connecting pieces, wherein the two waveform connecting pieces are positioned on two sides of the honeycomb laminboard; the waveform connecting pieces, the T-shaped reinforcing block and the honeycomb laminboard are fastened and connected by bolts; and the waveform connecting pieces and the connecting bottom pate are connected by glue and bolts in a mixing mode. The T-shaped connection structure has the advantages that the flexural rigidity is high; a bigger space is formed between the two waveform plates to bring convenience for overlaying a number of pipelines and subsequently maintaining; stress concentration on a joint can be effectively alleviated; the structural efficiency is improved; the bearing capability is enhanced, and the like. The T-shaped connection structure disclosed by the invention is suitable for mechanical connection between the composite material laminboard in a large-sized structure and other structures.

The invention provides a new type of cement mortar preparation and laying equipment for construction, including a tank body; the tank body is set as a hollow cylinder with a top opening and a tapered top, and a cover plate is set at the top opening of the tank body; The bottom surface of the tank body is fixed by welding the bracket and the bottom plate; T-shaped handles are welded and fixed on the top side wall of the tank body; the inside of the tank body is set as a mixing chamber; the mixing chamber is equipped with a stirring device and a water distribution device; the bottom of the tank body Connected with the discharge device; a fixed plate is welded and fixed on the side wall of the bottom of the tank body; the fixed plate is set in a T shape, the vertical part is fixedly connected with the discharge device, and the end of the horizontal part is provided with a scraping device; the new invention adopts The stirring device stirs the slurry, which is conducive to improving the uniformity of the slurry and improving the overall quality of the slurry; the discharge area of ​​the slurry is enlarged through the discharge device, which facilitates the laying of the slurry; the laying of the discharge device is facilitated by the scraping device. The cement slurry is scraped to reduce the labor intensity of workers.

The invention discloses a high-efficiency ground slotting device. The device comprises a vehicle body; rolling wheels are arranged at the bottom of the vehicle body; a mobile rack is arranged in the vehicle body, the lower part of the mobile rack is fixedly connected with a crossbeam plate, and the right side of the crossbeam plate is in rotating connection with a grinding wheel; and a dust sucking cylinder is arranged between the grinding wheel and a slotting blade group. Slotting blades connected in an interlaced manner are arranged to crush concrete, so concrete slag can be conveniently collected; an industrial dust suction machine, a dust sucking cylinder and an outer guiding block are arranged to fully suck the concrete slag; and the grinding wheel is arranged to polish the inner wall of a groove body to make the slag fully crushed and sucked and guarantee the parallel and level of edges of the groove body, so a pipeline can be conveniently directly laid, the groove body can be molded once, and the slotting working efficiency is improved.

The invention discloses an optical cable for rail transit, belonging to the technical field of optical cables. An optical fiber is straightly placed in a loose sleeve, and fiber paste is filled between the loose sleeve and the optical fiber to combine an optical fiber core. The cross section of a framework is of a cross-shaped structure, the cross-shaped structure of the framework is used for partitioning the periphery of the framework into four spaces, the framework is made of compound carbon fiber, one to three optical fiber cores are respectively arranged in each space around the framework, a water-blocking wire and cable paste are filled between the optical fiber cores and in a gap between the optical fiber cores and the framework, and are wound and coated by using a bundling yarn to form an optical cable core which is then sequentially coated with an aluminum-plastic composite belt layer and an outer sheath to form the optical cable for the rail transit. According to the optical cable, by using the framework made of the carbon fiber, the tension strength of the optical cable and the space in the framework are ensured, the self weight of the optical cable is reduced, so that the performance of the optical fiber in the loose sleeve is not influenced, and thus the optical cable is conveniently laid and installed; the defect that a thunder is easily introduced into a room by a metal reinforcer optical cable is eliminated, and the optical cable is suitable for a communication system of the rail transit.

The invention provides a symmetric turnout for line rails No.4 and No.5 in urban rail traffic engineering. The turnout is arranged on a parking line rail of an underground line in an urban rail engineering, the structure of the symmetric turnout comprises a group of railroad switches, a group of frogs and a connecting steel rail, wherein the railroad switches are connected with the frogs by virtue of the connecting steel rail so as to form a symmetric turnout provided with two side rails. The symmetric turnout provided by the invention has the beneficial effects that the turnout ensures a subway and a light rail vehicle to travel safely between a main line and a parking line, related technical standards and safety requirements of the urban rail engineering are met, and the advantages of safety, reliability and convenience in manufacturing, paving, construction and maintenance are realized. By applying the symmetric turnout provided by the invention, turnout investment can be saved, and length of an auxiliary line can be obviously shortened, thus investment of a building project is greatly saved, construction difficulty is reduced, and project risk is reduced.

The invention relates to the field of geomechanics, in particular to a geomechanical temperature sensitive material capable of simulating a weak bedding plane, and a making method and a temperature control system thereof. The material comprises the following components by weight: 45-55 parts of barite powder, 1.8-2.5 parts of cement, 1-4 parts of water, 1-5 parts of 46# waste hydraulic oil, 2-6 parts of paraffin, and 0.5-2 parts of rubber powder. The making method of the material consists of: mixing barite powder, rubber powder and cement uniformly, adding paraffin, 46# waste hydraulic oil and water into the obtained material 1, stirring the materials evenly and conducting molding. The material provided by the invention can be used in a temperature control system for temperature control experiment, and the system includes carbon fiber heating wires, a high precision temperature controller, non-wire breakage T type wiring terminals, a first group of lead, an air switch and a power supply. Multiple groups of the carbon fiber heating wires are placed in the geomechanical temperature sensitive material capable of simulating a weak bedding plane, and is connected to the first group of lead by a parallel connection mode. The geomechanical temperature sensitive material provided by the invention can simulate mechanical testing of the weak bedding plane.

The invention discloses a composite shear connection piece of a steel-concrete structure and a manufacturing and installing method thereof. The composite shear connection piece comprises shear connection piece bodies bent by reinforcing steel bars and bolt pin reinforcing steel bars penetrating through the shear connection piece bodies. The specific manufacturing and installing method includes the steps that steel beams are manufactured, and shear connection piece bodies are bent and welded; the steel beams are transported and lifted; concrete floor formworks are supported; the bolt pin reinforcing steel bars penetrate through the shear connection piece bodies, and the bolt pin reinforcing steel bars and the shear connection piece bodies are jointly bound to form a reinforcing steel bar mesh of concrete structure pieces; the formworks are disassembled after concrete pouring and normal maintenance are completed. According to the composite shear connection piece, as the shear connection piece bodies and the structural steel beams are welded and fixedly connected, and then a whole is formed through the bolt pin reinforcing steel bars penetrating through the shear connection piece bodies and the concrete structure pieces cast in place, the shearing strength and the rigidity of the steel-concrete composite structure are greatly improved, synergetic stressing between concrete plates and the steel beams is effectively achieved, and the composite shear connection piece has the advantages that the structure is simple, processing is easy and convenient, cost is low, construction cost is reduced, the site installing speed is high, and welding quality is guaranteed.

The invention discloses a ground fracture test device and a method for simulating fracture dislocation and underground water change. The device comprises a test model box, a fixed platform and a movable platform, a dislocation adjusting mechanism is arranged at the bottom of the moving platform; a first bottom plate, a first waterproof plate and a first water stop plate are sequentially arranged on the fixed platform from bottom to top, a second bottom plate, a second waterproof plate and a second water stop plate are sequentially arranged on the movable platform from bottom to top, and the dislocation adjusting mechanism comprises a support, a jack and a sliding limiting component. The method comprises the following steps: 1, performing preparation before a test; 2, laying a model soil layer in the model box, burying a sensor and connecting the sensor with a data acquisition instrument; 3, injecting water into the model soil layer; 4, simulating soil layer fracture dislocation of thesimulation model; and 5, simulating underground water level change by model soil layer drainage. The device can simulate the development condition of the ground fissures under the conditions of fracture dislocation and underground water change, and is high in simulation accuracy.

The present invention relates to a method for comprehensive treatment of building garbage. The method comprises: a, disinfecting building garbage to be treated with an agent; b, loading the building garbage obtained in the step a into a material hopper, transporting to a sorting platform, and sorting out debris; c, feeding the sorted building garbage into a jaw crusher through a plate type material feeder, and carrying out primary crushing; d, carrying out magnetic separation on the building garbage obtained in the step c with a magnetic separation machine, feeding into the material hopper ofan impact crusher, and carrying out final crushing with the impact crusher; and e, carrying out screening and peeling on the building garbage obtained in the step d by using a screening machine so asto obtain the sand and stone aggregate in concrete, feeding into a cleaning separation machine, carrying out cleaning separation, feeding into a coarse aggregate bin, and separating to obtain fine powder, wherein the fine aggregate separated by the cleaning separation is used as the raw material for dry powder mortar or pre-mixed mortar or concrete three-hole brick. According to the present invention, with the method, the building garbage resources can be subjected to comprehensive utilization, such that the building garbage can achieve ordered management, resource utilization and harmless treatment, and the purposes of land saving and secondary pollution reducing can be achieved.

The invention relates to the field of metallurgical slag processing, and particularly relates to a high-early-strength steel slag pervious concrete as well as a preparation method and applications thereof. The invention provides a high-early-strength steel slag pervious concrete which is prepared from the following raw materials in parts by weight: 10-17 parts of cement, 1-5 parts of steel slag micro-powder, 65-82 parts of steel slag aggregates, 0-10 parts of yellow sand or gravels, and 4-6 parts of water. Compared with steel slag pervious concretes in the prior art, the concrete provided by the invention has the advantages that the early strength properties are greatly improved, and the high-early-strength steel slag pervious concrete can be put into use in a short time. According to the invention, cement, water, steel slag micro-powder and steel slag aggregates are adopted for preparing the concrete, and a small amount of yellow sand and gravels also can be added as aggregates, so that extremely high compressive strength can be formed in 3 days, thereby facilitating the follow-up construction of pervious pavement system engineering.

The invention discloses a road marking device and a road marking method. The road marking device comprises a rack, wheels, a push handle, a charging basket, a material box, a feeding pipe, a bead scatter and a control mechanism which controls the charging basket to open and close. A discharge port is formed in the bottom of the material box; the bead scatter comprises a workbin, a partition platelocated in the workbin to divide the workbin into a first cavity and a second cavity, a first discharging pipe communicating to the first cavity, a second discharging pipe communicating to the secondcavity and an opening and closing mechanism which controls the first and second discharging pipes to open and close at the same time. The first discharging pie is closer to the material box relative to the second discharging pipe. Glass beads are placed in the first cavity, ceramic beads are placed in the second cavity and a coating is located in the charging basket. When the road marking device is used for marking, the charging basket, the first discharging pipe and the second discharging pipe are opened, and the push handle is pushed to move forward, so that a layer of glass beads is paved first after marking and a layer of ceramic beads is paved then. The uppermost layer is the ceramic beads and the ceramic beads are relatively good in reflectivity in rainy days.

The invention discloses a device for purifying paper-making waste gas and an operation method of the device. Through the improved device for purifying the paper-making waste gas, the dispersed waste gas can be in full contact with treatment fluid, so that the purifying efficiency is improve; on the other hand, multi-stage filtration adsorption is adopted so that purification and filtration of thewaste gas can be achieved well; on the whole, the device for purifying the paper-making waste gas has the advantages of a simple structure, convenient use and maintenance, thorough purification and convenient treatment of the waste gas; meanwhile, another purpose of the arrangement of the multi-stage filtration adsorption unit is that the ascending speed of the gas can be slowed down through the multi-layer adsorption, so that the gas stays inside the housing of the device slightly, and spraying and adsorption are achieved fully.

The invention provides a LoRa technology based intelligent ventilation system of a greenhouse. The greenhouse is provided with shutters; the ventilation system comprises an environment monitoring module, a microprocessor module, a power device and a LoRa wireless module; the environment monitoring module comprises a carbon dioxide sensor, a temperature and humidity sensor and an inclination anglesensor; the microprocessor module controls the power device to open the shutters when the carbon dioxide concentration in the greenhouse is higher than a preset carbon dioxide concentration and the temperature and humidity therein are greater than preset temperature and humidity, and controls the power device to close the shutters when the carbon dioxide concentration in the greenhouse is lower than the preset carbon dioxide concentration and the temperature and humidity therein are lower than the preset temperature and humidity; and the LoRa wireless module transmits the carbon dioxide concentration and the temperature and humidity in the greenhouse as well as an opening angle of the shutters to a monitoring terminal. Thus, the environment in the greenhouse is monitored to open or close the shutter intelligently, and ventilation and air exchange are carried out to adapt to crop growth.