215results about How to "Ensure stability and security" patented technology

The invention relates to a semi-rigid abnormal beam anchor cable truss roadway supporting system. A metal net is paved on the surface of a roadway, a semi-rigid abnormal beam anchor cable truss is arranged at a coal-rock roof or a roadway side, the semi-rigid abnormal beam anchor cable truss is formed by abnormal beams with semi-rigid nodes and anchor cables or anchor rods, and each abnormal beam is provided with a plurality of anchor cables or anchor rods; the anchor cables and anchor rods are anchored into a rock layer by passing through the abnormal beams and the metal net and apply a prestress to form an extrusion and annular protection function on surrounding rocks; and outer anchor ends of the anchor cables and anchor rods are provided with trays and locks, the trays and the locks make the end heads of the anchor cables or anchor rods tightly matched with the abnormal beams. The invention has the advantages that: (1), the protective surface area is large, the rigidity is high, stability is not easy to loss, and the integrality of the supporting system is ensured; (2), a steel material is saved, the cost is reduced, and the efficiency is increased; (3), the strength is high, and the regulation space of the whole supporting performance is large; and (4) the semi-rigid nodes can play a role of better flexible yield, and the stability and the safety of the whole supporting system are ensured.

The invention discloses a distributed big data computing engine and an architecture method. The computing engine includes: a distributed coordination service cluster, which is used to provide coordination service for distributed applications, stores schema configuration files of related plug-ins and business database objects; a message intermediate cluster for transmitting different types of service data, the service data comprising raw data, calculation results, snapshot data, baseline data and alarm data; a streaming computing cluster, which is based on Storm bottom computing framework and is used to abstract the processing process of temporal index big data into several processes; a visual control module, which is used to display and manage the data through the way of web; a data cachecluster used to reduce the memory overhead of the streaming computing cluster in large-batch computing. The invention can help the enterprise with less accumulation of big data technology, or the project team with shortage of project cycle and manpower can realize online streaming processing of massive time series index data conveniently and quickly.

The invention discloses an electroosmosis electrode and an electroosmosis draining system thereof, which comprise sectional draining electrode pipes, conductive filter cloth, a programmable direct current power supply, a draining pipe, a timing controller, a cable, a vacuum pump, a region optimizing device and a seismic wave real-time monitoring alarm, wherein the sectional draining electrode pipes are in thread connection by soft conductive connectors, are wrapped by the conductive filter cloth on the outside, meet the requirements of construction environments on mechanical properties and corrosion resistant property, and can still be used for a long time after multiple times of earthquakes and electroosmosis, and the use efficiency of electroosmosis equipment during soft base treatment can be improved by the uninterruptible electrifying of an electroosmosis instrument, thus reducing the construction cost. Excess pore water pressure generated by earthquake action can be timely discharged from a draining channel by the electroosmosis and vacuum negative actions, thus avoiding the shock damage to upper-part soil body and the earthquake liquefaction of a liquefied soil layer caused by the excess pore water pressure. The electroosmosis electrode and the electroosmosis draining system thereof are simple in structure, convenient to construct, durable and practical, and provides technical support and guarantee for promotion and application of an electroosmosis method on the fields such as soft base reinforcing and earthquake fortification of buildings.

The invention discloses a filling mining method for a downward access part. In the ore body mining process, a mining area is divided into spaced filling layers (3) and full filling layers (4) which are alternatively distributed in the vertical direction; the spaced filling layers (3) and the full filling layers (4) are each divided into a plurality of first strip blocks (1) and second strip blocks (2) which are alternatively distributed; downward access layer-by-layer mining is conducted in the ore body mining process. According to the filling mining method for the downward access part, the purposes of reducing the filling material usage amount in the mining process and reducing the mining cost are achieved on the premise that the stability of a mining field is guaranteed, layered strip block mining is conducted on an ore body, the filling ratio is decreased by reasonably arranging the mining sequence, and then the filling cost is reduced.

Disclosed is a method and system for managing a convoy of aircraft during taxiing. Taxi management is carried out by exchanging, by a first data transmission unit, information between the aircraft of the convoy concerning aircraft flight parameters of the aircraft within the convoy, and exchanging, between the aircraft of the convoy and at least one control station that manages the convoy collectively, information relating to the collective convoy. The exchange can be carried out by a second data transmission unit, with the ground control station receiving from each aircraft in the convoy information relating to convoy status, centralizing the received information, scheduling the convoy, and transmitting to each aircraft a convoy status table that indicates overall status of the convoy.

The invention discloses a supporting system of a water-rich drifting sand stratum full-weathering surrounding rock tunnel and a construction method. At least four layers of steps are arranged in a tunnel. Steel row frame supports are arranged between the steps and the top of the tunnel. An advanced small guide pipe and an advanced pipe shed are arranged at the top of the tunnel. A group of steel arch frames are arranged in the tunnel and are arranged at intervals in the longitudinal direction. The shapes of the steel arch frames are matched with the shape of the section of the tunnel. Pipe shed lock feet are arranged on the two sides of each layer of steps and on the steel arch frames respectively. Steel bar mesh pieces are laid and hung on the portions, between adjacent steel arch frames,of the inner lateral side of the tunnel. Concrete layers fully sprayed on the outer sides of the steel arch frames and the steel bar mesh pieces. Bar-shaped foundations are arranged on the positions,corresponding to the steel row frame supports, of the horizontal planes of the steps. Inclined supports are arranged between the steel row frame supports and the steel arch frames. The supporting system of the water-rich drifting sand stratum full-weathering surrounding rock tunnel and the construction method solve the technical problems that a traditional construction method easily causes settlement of an integral initial support structure, the construction space is small, steel frame arch foot pipe shed locking feet cannot be reinforced, the risk of median septum dismantling is large, the working procedures are complex and the construction speed is low.

The invention discloses a method for main arch closure of three-span hinged arch bridges by adoption of pre-descended and pre-deflected side-span steel trusses. The method includes the steps: pouring side piers of two side spans, reserving post-pouring sections at the top of the side piers, and arranging temporary piers between each side pier and a main pier; enabling one side span steel truss to deflect towards a midspan direction by a pre-deviation distance in initial erection, enabling the two side span steel trusses to descend at the positions of the side piers by a pre-descending distance, and when the steel trusses are erected to the main pier, fixing fixed hinge supports on one side while temporarily fixing movable hinge supports on the other side, and adopting a first jack to jack the steel trusses to separate from the temporary piers; hoisting and erecting the steel trusses to a main arch closure position, and enabling the first jack to jack the steel trusses so as to realize main arch closure; unfixing the movable hinge supports, enabling the first jack to jack the steel trusses to a standard height, pouring the side piers, and freeing the first jack. The method has the advantages that safety and precision in main arch closure are achieved without adjustment of cables or monolithic movement of main truss arches, and accordingly construction risks are reduced while construction period is shortened.

The invention relates to a construction method of the under cutting excavation supporting of a deeply buried soft-rock large tunnel. The invention aims to provide a construction method of the under cutting excavation supporting of the deeply buried soft-rock large tunnel, thus ensuring safe and stable structure of the tunnel in the construction process. The technical scheme of the invention is asfollows: the construction method comprises the following steps: 1) upper cross section grouted anchor bars, an upper cross section steel arch centering and a concrete spraying layer are arranged in an excavated upper cross section cavern in turn; 2) prestressed anchor bars are arranged on the spandrel, waist and arch springing of the upper cross section cavern respectively; 3) foundation piles with anchors are arranged on the arch springing parts of the two sides of the upper cross section cavern; 4) under cutting excavation is performed to the lower cross section cavern in a left-right framing mode to form an integral annular supporting; and 5) the above steps are repeated until the whole tunnel is completed. The invention is mainly used in various hydraulic and hydroelectric engineerings, in particular the deeply buried soft-rock tunnel with large cross section.

The invention discloses an automatic sterilization garbage bin which comprises an external garbage bin, an internal garbage bin sheathed inside the external garbage bin, and an upper garbage bin body stacked on the external garbage bin, wherein the upper garbage bin body is internally provided with an ozone generator and an ultraviolet emitter, the top of the upper garbage bin body is provided with a turnover cover, and the upper garbage bin body is also internally provided with a control device used for controlling the garbage bin to automatically work. The automatic sterilization garbage bin is convenient and practical, thorough in sterilization, and clean and sanitary.

The invention provides a construction method of a large-scan single-layer latticed shell steel structure. According to the construction method, during construction, the single-layer latticed shell steel structure is sequentially divided into three areas, namely a lifting area, an inlaying area and a splicing area from top to bottom, wherein rod pieces in the lifting area are installed on a bed-jig group of the lifting area lower than a design height, and are entirely lifted after installation. Therefore, the installation precision and quality can be ensured, and the construction security is improved. The construction method avoids the problems in the traditional bed-jig support method that a mass of bed-jig need to be erected and large-tonnage hoisting equipment needs to be used, and the stability of the bed-jigs is difficult to ensure. The invention provides the safe and reliable construction method with lower cost.

The invention provides a construction method for a well structure of a heat exchange type horizontal butt-joint geothermal well. The construction method for the well structure of the heat exchange type horizontal butt-joint geothermal well comprises the following steps that drilling is conducted on the ground surface until drilling into the stable clay layer or under a bedrock surface, a vertical well first opening well hole is formed, then second opening is conducted from the bottom of the vertical well first opening well hole until drilling under an arbitrary mudstone layer with a thickness being greater than 6m in the target heat storage layer, and a vertical well second opening well hole is formed; drilling is conducted in the surface of the ground surface until drilling into the stable clay layer or under a bedrock surface and the distance between a well opening of a vertical well and the surface of the ground surface is at least 250 m, and a horizontal engineering well first opening well hole is formed; then second opening is conducted from the bottom of the horizontal engineering well first opening well hole, and a horizontal engineering well second opening well hole is formed and communicates with the vertical well second opening well hole in a butt-joint mode, thus a horizontal engineering well cylinder and a vertical well cylinder form a U-shaped pipeline in a seamless butt-joint mode, and the structure is large in section surface area, heat exchanging water amount and heat exchanging amount; and according to the construction method for the well structure of the heat exchange type horizontal butt-joint geothermal well, heat exchanging is achieved only by using circulation of cold and heat water, no underground water is pumped, water resources are protected, the underground water is not polluted at the same time, and the environment-friendly effect is achieved.

The invention discloses a personnel identification monitoring system in a cable tunnel, characterized in that a processor receives detection information of the pyroelectric infrared sensor detection module; when a person is detected, the processor sends information to the face recognition module, the face recognition module starts to work, collected images are processed, images containing faces are subjected to feature extraction and then compared with image feature vectors in a system database, and a matching result is sent to the processor; and the processor executes the next work accordingto the result, if the work is a tunnel worker, the work is normal, and if the work is a foreign person, the alarm information is sent to the upper computer and instruction information is sent to the tracking module; the tracking module starts to work, and the alarm starts to work to remind that the foreign persons break through via the detection information of the ultrasonic sensor and send the collected video information to the upper computer on line.

The invention discloses an in-situ combined remediation technology for contaminated soil. The in-situ combined remediation technology adopts a method for combined use of an in-situ leaching technology and an in-situ stabilization solidification technology, and comprises the following steps: feeding leaching liquid into an injection well, extracting the pollutant-containing leaching liquid through an extraction well, and treating the pollutant-containing leaching liquid in wastewater treatment equipment; after leaching, injecting a stabilization agent into a polluted region through the injection well adopted in an in-situ leaching process, and controlling the flow direction of the stabilization agent by virtue of the extraction well to realize recycling; after stabilizing, injecting a solidification agent by virtue of the injection well, isolating site pollutants from an environment, and filling soil gaps. According to the in-situ combined remediation technology, the advantages of in-situ leaching and in-situ stabilization / solidification are combined and a treatment effect is good.

The invention provides a control system and method for a natural gas pipeline divided transportation electric regulating valve. It is only needed that a pressure high-limit value, a pressure low-limit value and a flow set value are manually preset, the system will perform automatic execution according to the control logistics in divided transportation operation. When the pipeline divided transportation pressure is ultra high or too low or the divided transportation flow is ultra high, the control system can automatically switch control modes without manual real-time monitoring and adjustment of pipeline control parameters, natural gas divided transportation operation is preferentially performed according to the preset flow value in a safety work condition on the premise that the pipeline pressure is not ultra high or too low, and it is guaranteed that the pipeline natural gas divided transportation process is safe and stable; and meanwhile, the flow divided transportation efficiency is improved, and manpower resources are saved. On the other hand, a sensor redundancy design module is adopted for the control system and method, the risk that the system function loses efficacy because of an outside single sensor fault is reduced.

The invention discloses a stability control construction method of a water-enriched soft rock tunnel passing through a fault crushed zone. A plurality of tunnel segments in a construction tunnel are constructed respectively from back to front. During construction of any one of the tunnel segments, the method comprises the following steps: 1, performing pipe shed forepoling; 2, performing tunnel excavation and preliminary bracing: performing upper peripheral side cavity excavation and preliminary bracing, performing a reserved core soil area cavity excavation and preliminary bracing, excavatingthe cavity which is excavated firstly and performing preliminary bracing as well as excavating the cavity which is excavated secondly and performing preliminary bracing; and 3, performing tunnel secondary lining construction. The method is reasonable in design, simple and convenient in construction and good in use effect; before excavation, the upper cavity is subjected to forepoling by a self-drilling pipe shed and is excavated by a two-step method, so that the excavation efficiency is effectively improved; and meanwhile, an integral supporting system with a stable structure, which is formedby connecting a surrounding rock integral reinforced structure outside the cavity and a tunnel preliminary bracing structure and tunnel secondary lining, can effectively improve the stability of thetunnel structure and guarantee the later safety of the tunnel structure.

The invention particularly relates to a single-line railway tunnel anti-rock-burst support method corresponding to different rock burst intensity levels; different support methods are utilized for thesingle-line railway tunnel under slight rock burst, medium rock burst and strong rock burst respectively, the slight rock burst section utilizes spraying high-pressure water on the rock surface, primary spraying concrete, and arranging a mortar anchor rod and a steel bar net support; the medium rock burst section utilizes spraying high-pressure water on the rock surface, primary spraying steel fiber concrete, and arranging a expansion type pre-stressed hollow anchor rod and a steel bar net support; the strong rock burst utilizes arranging an advanced pre-stressed release hole and an advancedanchor rod, injecting high-pressure water, primary spraying steel fiber concrete, erecting a steel arch frame, arranging an expansion shell type pre-stressed hollow anchor rod and a steel bar net support; explosion pits are disposed according to the depth of the explosion pits; According to the invention, a supporting method aiming at the anti-rock-burst of a single-line railway tunnel is systematically provided, the method has distinct gradation and strong practical operability, and can effectively guarantee the stability and the safety of construction under the rock burst condition of a single-line railway tunnel.

The invention discloses a supporting steel frame of a high altitude large-span cantilever structure mold frame. The supporting steel frame comprises a floor slab, a supporting frame and a cantilever beam, wherein the supporting frame is of triangular shape; the lower end of the triangular supporting frame is mounted on an embedded iron piece on a lower floor slab; the upper end of the triangular supporting frame is provided with the cantilever beam; and one end of the cantilever beam penetrates in an anchoring ring mounted on an upper floor slab and is wedged through a wooden wedge. The supporting steel frame of the high altitude large-span cantilever structure mold frame, disclosed by the invention, has the advantages of reasonable stress, high rigidity, strong bearing force at the cantilever end, large cantilever span, strong bearing force, large rigidity of the frame body and capability of effectively ensuring the integral stability and construction safety of the large-span cantilever structure mold frame. The steel frame can be integrally spliced on the site in advance and has the advantages of lightweight frame body, convenience for mounting and detaching and labor and time conservation. The supporting steel frame can be recycled for multiple times, obtains better economic benefits and is worthy of being generalized.

The invention discloses a power transmission line snow removing and deicing device for electric power overhaul, and relates to the technical field of electric power overhaul. The power transmission line snow removing and deicing device for electric power overhaul comprises a first half cylinder, wherein a driving mechanism, a clamping mechanism, a processing mechanism and a snow removing and deicing mechanism are arranged on the first half cylinder, a second half cylinder is installed on the first half cylinder in a hinged mode, the first half cylinder is attached to the second half cylinder,openings in the two sides of the first half cylinder and the openings in the two sides of the second half cylinder are each provided with a set of semicircular blades in a welded mode, and two sets ofstability maintaining wheels are rotationally installed on the inner wall of the first half cylinder. According to the power transmission line snow removing and deicing device for electric power overhaul, a soft rubber rod beats the surface of a power transmission line in a reciprocating mode, ice blocks frozen on the power transmission line are broken, compared with an ice breaking knife ice breaking or heating ice melting mode adopted by most devices, the mode can directly hit the surface of the power transmission line, the ice removing effect is more thorough, and due to the special material of the soft rubber rod, the power transmission line is not prone to damage and the potential safety hazard is small.

The invention relates to a method for installing an embedded type box base of a container ship. The method comprises the following steps of (1) pre-processing holes during blanking of inner bottom plates of branch sections; (2) scribing a datum line; (3) installing the box base in an embedding way; (4) pre-cutting a folded opening of each branch section of a ship body; (5) folding all branch sections of the ship body. According to the method for installing the embedded type box base of the container ship, disclosed by the invention, the situation that the lower bottom surface of a container can be well attached to the inner bottom plates is ensured by adopting the structure of the embedded type box base, the one-step installation forming can be realized, a traditional tedious way in which the height of a base plate is adjusted at a later stage is completely removed, the shipbuilding time period is greatly reduced, and the stability of the container during a transporting process is increased.

The invention discloses an autonomous berthing method and device for an unmanned surface vehicle, and the unmanned surface vehicle, and belongs to the technical field of unmanned surface vehicle control. The method comprises the following steps: performing GNSS global guide: after the unmanned surface vehicle receives a port entry instruction, executing a preset port entry task, entering a low-speed track and course keeping region, and enabling a course and track error of the unmanned surface vehicle to be in a certain range, thereby preparing to enter a label visible region; performing labelpixel guide: starting a label guide program according to a preset color block label in the label visible region after entering the label visible region, and finely adjusting an attitude of the unmanned surface vehicle to enter a dock for berthing; and if pixel frames are continuously lost or the course and track error exceeds a preset range in the label pixel guide process, and resetting the guidetask to the low-speed track and course keeping region. According to the autonomous berthing method and device, the stability and safety of enabling the unmanned surface vehicle to enter the port / dockcan be effectively and cheaply guaranteed, and the precision of entering the port / dock is improved, so that the autonomous berthing method and device is suitable for berthing the unmanned surface vehicle in a narrow and small space.

The invention provides a remote monitoring and real-time maintenance management system for working conditions of boats and ships. The system comprises a real-time equipment image acquisition unit, a fuel monitoring unit, a ship monitoring system, a data information center, and a monitoring center. The real-time equipment image acquisition unit arranged in a ship monitoring room includes an equipment image acquisition module. The ship monitoring system consists of a preliminary analysis unit including a plurality of wireless transmitting-receiving units, a signal processing unit provided with a data storage module and a dangerous information calculation and grading module, a dangerous information broadcasting module including a plurality of loudspeakers and warning units, and a signal receiving module. The monitoring center includes a human-computer interaction unit and a PC terminal. According to the system, important equipment of a boat or a ship can be monitored and working condition information of the ship or boat equipment can be found out and collected timely; and the collected working condition information of the equipment can be classified and organized. The shore-based monitoring center can carry out analyses based on the transmitted working condition information and a maintenance scheme is formulated and fed back. Therefore, the real-time maintenance of a ship or a boat is realized; the maintenance efficiency and accuracy are improved; and the service life of the ship or boat is prolonged.

The invention discloses a communication signal tower which comprises tower poles, pieces of reinforced angle steel, a high-damping seismic-isolation rubber support and a loading plate. The tower polesare arranged at the top of a fixed steel plate in a rectangular shape. The bottom end of the fixed steel plate is connected with the high-damping seismic-isolation rubber support. The high-damping seismic-isolation rubber support is mounted in a foundation. The pieces of reinforced angle steel are arranged on the inner sides of the tower poles in a staggered mode. A climbing ladder is verticallyfixed to the middles of the pieces of reinforced angle steel. First protective fences are arranged on the two sides of the climbing ladder. Top rods are horizontally fixed to the upper portions of thefirst protective fences. The loading plate is arranged between the top rods. According to the communication signal tower, the high-damping seismic-isolation rubber support and a damping bracket are arranged, thus horizontal vibration energy transmitted in an earthquake is dissipated by the high-damping seismic-isolation rubber support through special damping formula performance, the destroy action of horizontal seismic force borne by the signal tower is reduced greatly, the influence of strong wind on the whole signal tower can be weakened through the damping bracket, the stability of the bottoms of the tower poles is improved, and the resonance harm is reduced.

The invention discloses a highway strong crosswind section speed early warning control method and a highway strong crosswind section speed early warning control system, which relate to the technical field of traffic early warning. The highway strong crosswind section speed early warning control system comprises an information detection module, an information processing module and an information early warning publishing module. According to the highway strong crosswind section speed early warning control method, stress analysis is carried out on sideslip and rollover conditions possibly generated by different vehicle models on a strong crosswind road section; a speed limit optimization model is established, and a highway variable speed limit control strategy under the influence of strong crosswind is formulated on the basis of the speed limit optimization model; and finally, an early warning system is designed and early warning levels are divided, thereby effectively guaranteeing safetyand stability of vehicles driving on a highway.

The invention discloses a safety early warning system for industrial electric appliance frequency conversion device, belongs to the field of industrial electric appliance frequency conversion devices, and is used for solving the problem that fault conditions and abnormal states cannot be early warned and monitored when the industrial electric appliance frequency conversion device operates. The safety early warning system comprises an early warning and monitoring module, a quality calculation module, an early warning and defining module and a data analysis module. The data analysis module is used for analyzing the working data of the frequency conversion device, the early warning and defining module is used for defining and judging the operation value of the frequency conversion device after receiving the operation value of the frequency conversion device, and the quality calculation module is used for calculating the quality of the frequency conversion device for generating a verification early warning signal and a monitoring early warning signal after receiving the verification early warning signal and the monitoring early warning signal. According to the system, the frequency conversion device is timely and effectively monitored and diagnosed through a state monitoring technology, the abnormal condition of the device is timely forecasted before the device breaks down, and the safety and stability of production are ensured.

The invention discloses a method for constructing a water-rich weak surrounding rock tunnel crossing a fault broken belt. The method comprises the following steps that firstly, construction is carriedout on a plurality of tunnel sections in a construction tunnel from front to rear, and when any tunnel section is constructed, the construction method comprises the following steps that 1, advanced support is carried out on a pipe shed; 2, tunnel excavation and initial support are carried out, wherein upper peripheral side hole excavation and initial support are carried out, reserved core soil area hole excavation and initial support are carried out, first hole excavation and initial support are carried out firstly and thereafter second hole excavation and initial support is carried out; and3, tunnel secondary lining construction is carried out. The method has the beneficial effects that the design is reasonable, construction is easy and convenient, and the use effect is good; the self-drilling pipe shed is adopted to carry out advanced support on the upper hole body before excavation, and two-step method excavation is adopted, so that the construction efficiency can be effectively improved; meanwhile, the whole reinforcing structure of the hole peripheral rock, the tunnel primary support structure in holes and the tunnel secondary lining are connected to form an integral supportsystem with a stable structure, the stability of the tunnel structure can be effectively improved, and the safety of the later tunnel structure is ensured.

The invention discloses a distributed system fault root cause tracing method based on a knowledge graph technology. The method is used for solving the problem that large distributed system fault root cause tracing is difficult. The distributed system fault root cause tracing task is used for finding out a root cause causing a system fault. According to the method, a fault knowledge graph is constructed for each type of faults in a distributed system, events are generated from historical fault data by using a template technology in the construction process, then a fault propagation graph is constructed by using a relationship between learning events of a machine learning model, and finally, a merging algorithm is used to extract a common structure of the fault propagation graphs of the same type of faults to generate a fault knowledge graph. When a fault occurs, the fault knowledge graph most similar to the real-time fault propagation graph is obtained by constructing and calculating the real-time fault propagation graph and the similarity between the real-time fault propagation graph and the fault knowledge graph, so that the root cause of the system fault is obtained according to the fault root cause marked by the fault knowledge graph.

One or more embodiments of the invention provide a battery protection device, and the device comprises a battery shell, poles at the two ends of the battery shell are electrically connected with connecting pieces to be connected and conducted with tabs of a battery core body, a liquid inlet pipe is externally connected with an expansion valve to introduce cooling liquid, and a liquid outlet pipe is attached to the outer side wall of the battery core body to cool and dissipate heat. Expansion liquid is filled in the temperature sensing bulb so as to sense the temperature of the liquid outlet pipe, control the opening degree of the expansion valve and automatically adjust heat dissipation in real time; the expansion valve is further provided with a switching mechanism, a screw and a nut which are meshed with each other in a threaded mode, the hollow interior of the nut is filled with flame-retardant powder, and an elastic film is attached to the outer side of the nut in an original state, and is fixedly clamped through an elastic rope. When the temperature sensed by the temperature sensing bulb reaches a limit threshold value, the switch mechanism can be triggered to trigger and conduct the top thorn mechanism, so the connecting piece and the elastic rope are broken to scatter the flame-retardant powder, and therefore, the functions of timely extinguishing fire and isolating thebattery are realized.

The invention relates to an intelligent sine-wave-output uninterruptible power supply and an automatic control method, which belong to the technical field of power supplies. The device disclosed by the invention comprises a sampling detection circuit, a booster circuit, an inversion circuit, an output control circuit, a display alarm circuit, a communication circuit, an auxiliary power supply circuit, a charge control circuit and a single chip, wherein the single chip is connected with the sampling detection circuit, the booster circuit, the inversion circuit, the output control circuit, the display alarm circuit, the communication circuit, the auxiliary power supply circuit and the charge control circuit, the booster circuit is connected with the auxiliary power supply circuit and the inversion circuit, and the inversion circuit is connected with the output control circuit. The method disclosed by the invention comprises the steps of initializing; detecting a mains supply; starting communication, detecting overload information by the single chip through an ADC port, and when an overload phenomenon occurs, sending a shutdown signal by the single chip to stop working; repeatedly and cyclically executing programs, and detecting all the links of the whole circuit. The device disclosed by the invention is safe and reliable, high in output stability, and capable of reducing cost.

The invention discloses an ABS / EBD comprehensive test system of an automobile, which is composed of a drum dynamometer 2 and a comprehensive tester 4, wherein the drum dynamometer 2 is fixedly installed on the foundation, two rear wheels of the comprehensive tester 4 are arranged on the drum of the drum dynamometer 2 according to the position requirement by longitudinal positioning; the drum of the drum dynamometer 2 rotates to drive two rear wheels 9 of the comprehensive tester 4 to rotate so as to carry out automobile ABS and EBD control comprehensive test research and performance test; the comprehensive tester 4 adopts three-wheel rack type structure, a front wheel 5 is installed on the rack of the comprehensive tester 4 to ensure the stability of the comprehensive tester 4; the controller 3 of the comprehensive tester 4 controls a brake 7 of two rear wheels 9 on the comprehensive tester 4 to brake; one rear wheel can be independently braked to carry out the development test research and performance test of the ABS system; two rear wheels can be simultaneously braked to distribute the braking force of two wheels, i.e. the development test research and performance test of the EBD system.

The invention discloses a tunnel construction method based on an inverted arch and inverted arch filling layer replaced steel and concrete combined structure. A tunnel secondary lining of a construction tunnel is formed by splicing an arch wall lining and a tunnel bottom lining, the tunnel bottom lining is a prefabricated inverted arch, and the inverted arch and inverted arch filling layer replaced steel and concrete combined structure is formed by the prefabricated inverted arch and a steel truss structure arranged on the prefabricated inverted arch. During construction tunnel construction, the steps including the first step of tunnel excavation, the second step of preliminary bracing, the third step of prefabricated inverted arch splicing construction, the fourth step of steel truss structure construction and the fifth step of arch wall lining construction are included. According to the method, step design is reasonable, construction is simple and convenient, the usage effect is good, a cast-in-place tunnel bottom lining is replaced with the assembled inverted arch formed through connection of three inverted arch prefabricated pieces, a concrete filling inverted arch filling layer is replaced with the steel truss structure, only alignment splicing is needed on the site, the tunnel inverted arch and tunnel filling construction process can be greatly simplified, the arch wall lining construction quality can be ensured, and the construction efficiency is improved.