125 results about "Tunnel ventilation" patented technology

The invention discloses a tunnel ventilation control system and method based on artificial intelligence, and relates to the technical field of ventilation control, and the method comprises the steps: in a tunnel design stage, building an unsteady-state computational fluid dynamics model based on tunnel three-dimensional linear parameters, calculating turbulence structures under different traffic conditions through a large eddy simulation method, and calculating an unsteady-state computational fluid dynamics model; determining an optimal space configuration scheme of the fan group according to the distribution of the velocity field and the pressure field; in the tunnel construction stage, multiple types of sensor arrays are arranged along the vault and the side wall of a tunnel in a layered mode; in the tunnel operation stage, real-time vehicle tracks and speed distribution information of a traffic monitoring system are obtained; establishing a ventilation demand dynamic prediction model based on space-time correlation analysis, constructing a fan cooperative control model considering airflow organization optimization, and solving an optimal operation strategy by adopting a multi-target adaptive weight distribution algorithm; when a fire characteristic signal is monitored, the multiple sets of fans are coordinated to form a relay type smoke exhaust airflow organization.

The invention provides a tunnel fire monitoring and ventilation and smoke exhaust linkage control system. The tunnel fire monitoring and ventilation and smoke exhaust linkage control system comprises a tunnel environment and fire monitoring module, a data fusion processing module, a tunnel ventilation and smoke exhaust linkage control module and a remote monitoring and control management system module which are connected through a communication network. The data fusion processing module is configured with a D-S evidence theory algorithm and is used for receiving multi-source environment data, calculating basic probability distribution of data of each sensor, quantitatively evaluating a fire occurrence probability through a combination rule and generating a fire state judgment result; the tunnel ventilation and smoke exhaust linkage control module is used for receiving the fire state judgment result and determining the target wind speed according to the fire scale; a fuzzy PID control unit and a hysteresis control unit are arranged in the tunnel ventilation and smoke exhaust linkage control module. According to the method, the problem of high false alarm rate of traditional monitoring is solved, the engineering problem that discrete ventilation equipment is difficult to continuously and accurately control is solved, and the disaster prevention and reduction capability of the tunnel is remarkably improved.

The invention belongs to the technical field of tunnel construction, and particularly relates to a tunnel construction ventilation intelligent regulation and control method based on electrical automation. Distributed sensor arrays are deployed on a tunnel driving working face, a haulage roadway and a fan station through a multi-source heterogeneous sensor network, ventilation loads, environmental parameters, equipment states and construction event signals are collected in real time, and real-time and accurate original data support is provided for the system; a three-dimensional fluid mechanics-particulate matter diffusion coupling simulation model of a tunnel ventilation system is constructed, then a digital twin is used as a virtual training environment, an optimization instruction is converted into an electrical control signal, and a closed-loop PID-fuzzy coincidence controller dynamically compensates execution delay, controls operation of a fan and an air valve, and finally performs dynamic simulation on the tunnel ventilation system. And an execution result is fed back to the digital twin body for model calibration, so that finer and more efficient ventilation control is realized, the use problem in a high-altitude and alpine region environment is solved, the continuous effectiveness of ventilation regulation and control is effectively guaranteed, and the overall performance is improved.

The invention relates to the technical field of tunnel ventilation, and particularly discloses an energy-saving air duct design method, system, equipment and medium for a tunnel by using natural wind as ventilation power, and the method comprises the following steps: determining the direction and speed of the natural wind in the tunnel and the quantity of air passing through the energy-saving air duct according to natural wind data detected under the perennial meteorological conditions of the tunnel; determining the arrangement position of the energy-saving air duct according to the arrangement positions and geological characteristics of the electrical equipment, the control equipment and the fan; according to the section shape, the arrangement form and the wall surface material of the energy-saving air duct, the on-way resistance coefficient and the local resistance coefficient of the energy-saving air duct are determined; calculating the total resistance of the air duct, and determining the economic section of the energy-saving air duct according to the principle that the total resistance of the air duct is minimum. According to the method, natural wind is used as ventilation power for ventilation and energy conservation, the relation between the economic section and the total resistance loss is combined, the balance between civil engineering cost and the natural wind utilization rate is established, and a ventilation scheme which is more economical and higher in efficiency is obtained.

The utility model relates to a prefabricated middle partition wall structure of a tunnel ventilation inclined shaft. The prefabricated middle partition wall structure at least comprises a bottom supporting structure, a steel supporting assembly and a prefabricated modular wallboard. A positioning groove is formed in the top face of the bottom supporting structure, and the bottom of the steel supporting assembly is embedded into the positioning groove and fixed. The prefabricated modular wallboard is formed by splicing a plurality of prefabricated slabs, the adjacent prefabricated slabs are connected through tongue-and-groove structures which are matched in a concave-convex mode, and the tongue-and-groove joints are filled with sealing materials. The steel supporting assemblies are longitudinally arranged at intervals, and the tops of the steel supporting assemblies are fixed to a tunnel lining to form a steel-concrete combined structure for supporting the prefabricated modular wallboard. The steel supporting assembly and the prefabricated modular wall plate form a steel-concrete prefabricated structure, and the stability of the whole structure is enhanced. By adopting the autoclaved aerated concrete precast block material and the concave-convex groove embedded modular structure, the problems that the construction quality is difficult to control, the construction period is long, the on-way resistance of air flow is large and the like in the existing reinforced concrete mid-partition wall are solved.

The invention discloses a plateau long tunnel transverse channel angle optimization method, relates to the technical field of tunnel construction safety and operation, establishes a quantitative relation between a transverse channel angle and tunnel ventilation energy consumption, and provides a transverse channel optimal angle suggestion suitable for plateau weak surrounding rock. By constructing a stress-resistance-cost multi-factor coupling analysis model and combining rock mechanics and fluid dynamics numerical simulation, surrounding rock deformation, stress distribution and ventilation smoothness characteristics under five angle working conditions of 30 degrees, 40 degrees, 60 degrees, 70 degrees and 90 degrees are systematically compared and analyzed; the conclusion that the 60-degree crossing angle shows the optimal comprehensive performance in the aspects of relieving stress concentration of a triangular area, restraining deformation of a top plate and a bottom plate, improving ventilation efficiency and reducing operation cost is obtained, and theoretical basis and practical reference are provided for engineering design and optimization of the angle of the transverse channel of the plateau long tunnel.

The invention relates to a highway tunnel ventilation and smoke exhaust device and method based on storage. The device comprises a gas storage space, a flow guide channel, a partition baffle, an axial flow fan and a ventilation control module. The partition baffles are arranged in the tunnel discharge flue and divide the tunnel discharge flue into multiple sections of ventilation flues, each section of ventilation flue is provided with a communicating opening, and the ventilation flues are communicated with a tunnel space through the communicating openings; each section of ventilation flue is communicated with the gas storage space through a flow guide channel, and the axial flow fan is mounted in the flow guide channel; the ventilation control module is in control connection with an axial flow fan, and ventilation flues at two ends of the tunnel discharge flue are respectively provided with an air supply and exhaust tower; when the tunnel traffic flow reaches a threshold value, the gas storage space stores waste gas in the tunnel space and supplies fresh air to the tunnel space; and when the traffic flow of the tunnel is smaller than a threshold value, fresh air is stored in the air storage space, and stored waste gas is exhausted. Compared with the prior art, the ventilation system has the advantages of small environmental influence, low ventilation energy consumption and the like.

The invention relates to the field of tunnel structures, and discloses a ventilation system and method for a through parallel adit extra-long highway tunnel. The system comprises a flat pilot tunnel, an inclined shaft, a plurality of connection channels, a ventilation system and an intelligent control system, and the flat pilot tunnel is located between a left tunnel and a right tunnel and is parallel to the left tunnel and the right tunnel; the inclined shaft is respectively communicated with the flat pilot tunnel, the left tunnel and the right tunnel; the connecting channels are arranged at intervals in the length direction of the flat pilot tunnel and enable the flat pilot tunnel to be communicated with the left tunnel and the right tunnel. Comprising a concrete partition plate extending in the length direction of the flat pilot tunnel, the concrete partition plate divides the flat pilot tunnel into an upper layer and a lower layer, a flat guide air supply duct and a flat guide discharge flue are formed respectively, and the flat guide air supply duct is also used as an emergency evacuation channel; and the control module is used for controlling the ventilation system to strengthen the air supply function in an emergency state, so that a positive pressure environment higher than the left hole and the right hole is formed and maintained in the flat guide air supply duct. The method has the beneficial effects that the flat pilot tunnel has the evacuation function, and the emergency rescue capacity is improved.

The invention provides a method and a device for determining a tunnel ventilation on-way resistance coefficient in combination with a thermal potential difference, and the method comprises the steps: building a tunnel ventilation energy conservation model in combination with the influence of the thermal potential difference; the thermal potential difference is systematically calculated and necessary pressure correction is carried out based on field measurable parameters, so that the finally determined on-way resistance coefficient of tunnel ventilation can more accurately reflect the ventilation resistance characteristic under the actual working condition, and the calculation deviation caused by neglecting the air density change is effectively overcome; according to the method, the accuracy and reliability of determining the resistance coefficient in a complex environment, especially a tunnel with remarkable temperature difference and elevation difference are remarkably improved, and a more scientific and reliable technical basis is provided for precise design and efficient operation of a tunnel ventilation system.

The invention discloses a power transmission tunnel ventilation system optimization design method based on negative heat source equivalence and multi-field coupling, and belongs to the technical field of power transmission engineering. Aiming at the problems that the three-dimensional fluid simulation calculation amount of the long-distance underground power transmission tunnel is huge and parameterized optimization is difficult to carry out, the method comprises the following steps: firstly, constructing a two-dimensional finite element model containing an equivalent negative heat source, and mapping the heat dissipation effect of air axial flow into section heat absorption power; then, through electromagnetic-heat-flow multi-physics field coupling calculation, the maximum allowable current-carrying capacity under different ventilation wind speeds and vertical shaft distances is obtained; and finally, establishing a full-life-cycle comprehensive cost function including the capital construction project amount, the ventilation node project amount and the operation energy consumption, and determining optimal ventilation design parameters through an optimization decision. According to the method, the calculation time is remarkably shortened on the premise that the calculation precision is guaranteed, and economic and technical collaborative optimization of the ventilation system of the power transmission tunnel can be rapidly achieved.

This invention discloses a tunnel ventilation control method, equipment, and medium based on environmental prediction, relating to the field of environmental management technology. The method includes: collecting and preprocessing environmental data; generating a pollutant heat map based on a pre-trained pollutant diffusion model; overlaying personnel distribution data with the pollutant heat map and determining the tangential direction of the personnel avoidance path as the airflow direction for evacuation guidance, generating evacuation wind direction data; extracting the speed combination and deflection angle of the tunnel ventilation fan from the evacuation wind direction data and outputting a fan control command set; monitoring the pollutant concentration values ​​in each tunnel ventilation area in real time after directional airflow guidance using a smoke concentration sensor; and comparing the predicted concentration values ​​in the pollutant heat map with the actual pollutant concentration values ​​to verify the tunnel ventilation control effect. This invention achieves environmental prediction and airflow guidance correction in the tunnel ventilation control process through the synergy of pollutant heat map generation and evacuation wind direction data generation.

This invention discloses a method, apparatus, equipment, and medium for controlling a tunnel ventilation fan based on tunnel environment monitoring, relating to the field of automated energy-saving control technology. The method includes: acquiring a vehicle model image set and vehicle images and spectral imaging images of vehicles entering the tunnel, wherein the vehicle model image set includes sample images of several different vehicle models; identifying the vehicle model; using the spectral imaging image of each vehicle as input, monitoring exhaust emissions according to the vehicle model using a vehicle exhaust emission model, obtaining exhaust emission monitoring values, and controlling the operating state of the tunnel ventilation fan based on the exhaust emission monitoring values. This solves the problems of existing ventilation methods for long-distance tunnels, which cannot be individually controlled according to the tunnel environment, resulting in high energy consumption and high maintenance and operating costs.

The utility model relates to a tunnel ventilation equipment technical field, concretely is an intelligent tunnel ventilation control system based on stepless speed regulation technology. Include: wind speed sensor for real -time monitoring the wind speed in the tunnel, main control unit for receiving the data of wind speed sensor, calculates the fan speed regulation amount, and generates control instruction, stepless speed regulation drive module is connected with main control unit, realizes the smooth stepless regulation of fan blade rotating speed through the adjustment fan input voltage or frequency, feedback module is used for real -time monitoring the actual rotating speed and operating condition of fan, and the data is fed back to main control unit, forms closed -loop control, communication module, communication module connects feedback module, is used for realizing remote control and data interaction, storage module is used for storing wind speed, rotating speed and control instruction historical data, user interface is used for providing operation interface, and the user sets target wind speed through touch -sensitive screen or remote control equipment.

The utility model provides a hanging type air duct for a mine tunnel, which belongs to the field of tunnel ventilation equipment and comprises an air guide duct body, a hanging assembly and a butt joint assembly. A plurality of supporting rings are fixed to the surface of the air guide barrel at intervals. Butt-joint rings are installed at the two ends of each air guide barrel, a hinged support is installed on the surface of the butt-joint ring at one end in a surrounding mode, a hook is installed on the surface of the hinged support in a hinged mode, and a lock catch is installed on the surface of the butt-joint ring at the other end in a surrounding mode. The hook hinged to the surface of the butt joint ring at one end is connected with the lock catch on the surface of the butt joint ring at one end of the adjacent air guide barrel in a hanging mode, so that the two sections of air guide barrels are connected in a butt joint mode, and the torsional spring arranged at the hinged position of the hook and the hinged support plays a role in pushing the hook to be tightly connected with the lock catch in a hanging mode and preventing the hook from being separated from the lock catch due to stress. An iron wire fixing mode is replaced, and mounting and dismounting are convenient.

This utility model provides a long-distance ventilation chamber for tunnels, relating to the technical field of tunnel ventilation devices. It includes a chamber structure and a fan structure. The chamber structure is installed within the main tunnel opening of the external tunnel lining structure, and comprises a chamber shell formed by connecting multiple chamber shell units. The chamber shell has a first external interface and a second external interface, both of which are equipped with fan structures. The first external interface is used to connect with the tunnel inclined shaft of the tunnel lining structure through a corresponding fan structure; the second external interface is used to connect with the tunnel cross passage of the tunnel lining structure through a corresponding fan structure. This utility model alleviates the technical problems of existing technologies in long-distance construction tunnel ventilation, such as the inability to control the airflow of ducts at multiple construction ends and the cumbersome installation of multiple ducts.

The invention relates to the technical field of tunnel construction, in particular to a tunnel ventilation control method. Comprising the steps of establishing a ventilation model, and generating an initial ventilation strategy according to tunnel engineering parameters and the ventilation model; establishing a plurality of monitoring points according to the tunnel engineering parameters, and obtaining feedback data of each monitoring point; whether the initial ventilation strategy is corrected or not is judged according to all feedback data; the related parameters such as the air speed, the air volume and the harmful gas concentration in the tunnel are monitored in real time according to the preset adjusting period, the tunnel ventilation quantity is dynamically adjusted according to the preset ventilation model, it is ensured that the harmful gas concentration in the tunnel is always within the safety range, and therefore the health and safety of operators are protected. The ventilation model is constructed by combining multiple demand models, the minimum air volume can be calculated according to actual needs, unnecessary energy consumption is avoided, the operation cost of the ventilation system is reduced, and the ventilation efficiency is improved.

This invention discloses a method and system for assessing the health status of tunnel ventilation fans. The method includes: S1: setting the health status level of the ventilation fan; S2: statistically analyzing the average and peak values ​​of the fan's characteristic parameters at different operating frequencies over multiple cycles; S3: setting the allowable value Φmax of the overlap of the current envelope between the three phases, and setting the sampling time interval T. m When Φ≧Φmax, a burnout alarm is triggered; when Φ<Φmax, execute S4; S4: Calculate the single-parameter health status h of the fan. x S5: Set the weight of the characteristic parameter x and calculate the multi-parameter health degree h of the fan; S6: Define the health status of the fan based on the health degree h calculated in S5 and the fan health status level set in S1. This invention can promptly alert management personnel to handle abnormalities, greatly reducing the possibility of fan burnout, and is suitable for further promotion and application.

The invention discloses a tunnel fan fault detection method and system based on SimCLR, and the method comprises the steps: collecting the original data of a plurality of sensors, recognizing the operation condition of a tunnel fan, and carrying out the data preprocessing; extracting advanced features in parallel by using a one-dimensional convolution variational auto-encoder and short-time Fourier transform, and generating an enhanced feature data packet; performing deep fusion and analysis on the features by adopting a SimCLR model with an embedded cross attention mechanism, and performing fault classification and trend prediction in combination with MLP and Neural ODE; and an SHAP technology and an EWC technology are adopted to provide decision interpretability and analysis capability. The method has the advantages that the multi-scale feature fusion and analysis technology is adopted, cross-working-condition high-precision fault detection is achieved, compared with a traditional diagnosis method depending on a single feature, the problem that generalization performance is reduced due to fault mode diversification in a complex industrial scene is solved, the maintenance cost is reduced, and the reliability of a tunnel ventilation system is improved.

The application belongs to the technical field of tunnel testing, and discloses a ventilation tunnel air volume and local heat exchange parameter testing device and a testing method thereof. The testing device comprises a sensor unit and a central processing unit. The sensor unit comprises a sensor, an acquisition module, a wireless communication module and a power module. The central processing unit comprises a wireless communication module, a data processing module, a data storage module, a touch screen and a power module. The sensor unit is installed on the same section of the tunnel according to a certain number and rule. The application has the following technical effects: long-period continuous measurement of tunnel ventilation parameters is realized; the accuracy and stability of the tunnel ventilation parameter measurement value are ensured; the tunnel use is not affected, and the vehicle is allowed to pass; and the uncertainty of temperature measurement at the high position of the tunnel wall is reduced.

The utility model discloses a novel municipal tunnel ventilation device which is applied to a ventilator body, primary noise reduction mechanisms are symmetrically arranged on the outer wall of the ventilator body, the primary noise reduction mechanisms are connected through a connecting mechanism, and the right side of the primary noise reduction mechanism located on the right side is connected with a filtering mechanism through an installation mechanism. Mounting rods are arranged on the top of the first-stage noise reduction mechanism and the top of the ventilator body, a second-stage noise reduction mechanism is arranged on the inner wall of the ventilator body, the first-stage noise reduction mechanism comprises mounting rings and first-stage noise reduction pads, and the mounting rings are symmetrically arranged on the outer wall of the ventilator body. According to the tunnel ventilation device, the driving environment in a tunnel is improved, the influence of noise on surrounding residents is reduced, the ventilation device is more convenient to install and maintain due to the modular design, each module can be independently installed and detached, the construction difficulty is reduced, the construction time is shortened, and in addition, the modular design further facilitates later upgrading and extension.

This utility model relates to a dust suppression device for tunnels, comprising: a mounting box with an air inlet, an air outlet, and a water supply channel; a connecting pipe fixedly connected to the mounting box; a water supply pipe rotatably mounted inside the mounting box; the water supply pipe connecting to a rotating disk; and an atomizing nozzle mounted on the rotating disk. By turning on an external water pump, pressurized water enters the hollow rotating disk through the water pipe, connecting head, water supply channel, and water supply pipe, and is finally sprayed out as fine water mist from the atomizing nozzle. Subsequently, tunnel ventilation is activated, and the airflow exits from the air outlet, merging with the water mist and promoting its diffusion, initially expanding the dust suppression range. At the same time, it drives the fan blades, causing the atomizing nozzle and trigger rod to rotate, making the water mist a ring-shaped rotating spray to further expand the range. Simultaneously, the trigger rod periodically pushes the air guide plate to change the wind direction, and the periodic adjustment of the wind direction changes the area where the wind and mist merge, ultimately achieving large-area dust suppression in the tunnel.

The invention discloses a ventilation device for highway tunnel construction, and relates to the technical field of tunnel ventilation, the ventilation device comprises a ventilation assembly, the ventilation assembly comprises a fan pipe, a ventilation pipe is fixed to one side of the fan pipe through bolts, and a supporting ring is fixed in the ventilation pipe; the mounting assembly is arranged on the ventilation pipe and comprises a moving part arranged on the ventilation pipe, and the moving part comprises an arc-shaped supporting plate arranged on the surface of the ventilation pipe. The ventilation pipe has the beneficial effects that the multiple sets of supporting rings are arranged in the ventilation pipe, the anti-pressure capacity of the ventilation pipe can be enhanced, collapse during air draft is avoided, efficient extraction of tunnel face smoke dust is guaranteed, the installation assembly is matched with the sliding rail fixed by the arch shoulder embedded part, the ventilation pipe slides along the sliding rail through the sliding base and the pin roller, large equipment such as a crane is not needed, and hoisting parts and quick connecting parts are matched; the middle section of the ventilation pipe can be spliced and quickly disassembled and assembled, the ventilation pipe can flexibly extend along with forward movement of a tunnel face, the installation period is greatly shortened, and interference to tunnel construction is reduced.

The invention provides a tunnel ventilation pressurizing device, which belongs to the field of tunnel ventilation devices, and comprises an air supply assembly, a filtering assembly and a damping assembly, during use, after the first mounting shell and the second mounting shell are connected, the two cavities form a mounting cavity, the impeller is mounted in the mounting cavity, the variable-frequency and variable-speed motor in the first mounting shell rotates to drive the impeller to rotate at a high speed, and air is sucked in and accelerated through an air inlet pipeline connected with an air inlet in the other end of the first mounting shell; and then the air is exhausted through an air supply pipeline connected with an air outlet in the other end of the second mounting shell at high pressure and flow speed, power is provided for air flowing in the tunnel, fresh air is conveyed into the tunnel, meanwhile, vitiated air is exhausted, the air quality in the tunnel is effectively improved, the health and safety of constructors are guaranteed, and in an emergency, the safety of the constructors is guaranteed. The device can quickly exhaust smoke, improve visibility, create favorable conditions for personnel evacuation, and reduce casualties and property loss.

The utility model discloses a tunnel fan supporting structure suitable for high-altitude strong monsoon climate, and belongs to the technical field of tunnel ventilation. Comprising four stand columns, four lower transverse supports, two or more upper transverse supports and two top beams, and the top beams extend in the length direction of the base frame and are fixed to the top ends of the stand columns; a plurality of mounting beams corresponding to the positions of fan supporting legs are fixedly welded above the top beam in the width direction of the foundation framework; and the mounting beam is fixedly connected with an upper flanged plate. The device is mainly manufactured by welding the I-shaped steel and the channel steel, is convenient to manufacture, has a stable structure, and can well adapt to severe weather in high-altitude and strong monsoon climate regions; the fan is well supported, it is guaranteed that the fan can normally operate under the extreme weather condition, and the air quality in a tunnel is guaranteed.

The utility model provides a tunnel ventilation device, which belongs to the technical field of tunnel construction and comprises a ventilation pipeline and a fan, the ventilation pipeline is arranged along the length extension direction of a tunnel, and the fan is arranged at one end of the ventilation pipeline extending out of the tunnel and used for introducing air into the ventilation pipeline; an airflow pressurizing section is arranged on the side, away from the draught fan, of the ventilation pipeline, and the diameter of the airflow pressurizing section is smaller than that of other positions of the ventilation pipeline. A telescopic section is arranged on the ventilation pipeline and is used for adjusting the length of the ventilation pipeline; the ventilation pipeline is communicated with humidifying equipment which is used for increasing the humidity of air introduced into the tunnel so as to reduce dust; the problems that in an existing tunnel ventilation mode, energy consumption is large, ventilation and construction progress are not matched, and dust emission is difficult are solved.

The application discloses a tunnel construction ventilation control method and system based on the Internet of Things, and relates to the technical field of intelligent control, and comprises the following steps: simulating tunnel ventilation to obtain a tunnel flow field diagram and an air flow area, calculating dust deposition velocities of each air flow area, sending a first control signal, performing a first operation, presetting a transition time point, and performing second control. The application dynamically adjusts ventilation parameters through real-time data, avoids poor ventilation effect or energy waste caused by fixed parameters in a traditional ventilation system, optimizes ventilation parameters, ensures that the dust concentration in the tunnel is always within a safe range, dynamically controls the ventilation system to quickly respond to changes in the construction process, guarantees construction safety, intelligently controls ventilation parameters, avoids unnecessary energy waste, flexibly adjusts ventilation parameters according to different tunnel construction conditions, and has strong adaptability and saves power.

The invention belongs to the technical field of fans, and relates to an energy-saving fan for tunnel ventilation, which comprises an air duct, an impeller and an external driving system. The driving motor is arranged outside the air duct, and output torque is transmitted to the impeller in the air duct in a non-contact mode through the magnetic transmission device. The magnetic transmission device comprises a sealing spacer bush which is made of a non-magnetic material and is internally provided with a cooling flow channel, and the spacer bush isolates the inner and outer magnetic rotors and fixes the inner and outer magnetic rotors on the wall of the air channel. The cooling system drives a cooling medium to flow through the cooling flow channel and the motor housing for heat dissipation. A temperature control system is further arranged, the cooling strength can be dynamically adjusted according to the monitored temperature, and the key area of the outer wall of the air duct is covered with a thermal barrier coating layer. The driving system is isolated from a severe environment, the operation reliability at extremely high temperature is guaranteed through active cooling and intelligent control, and the problem that a tunnel fan is prone to being damaged in a fire disaster is solved.

The invention relates to an energy-saving intelligent tunnel jet fan system, and belongs to the technical field of tunnel ventilation. The technical problems that ventilation adjustment is not flexible and energy consumption is high due to the fact that an airflow channel of an existing tunnel fan is fixed are solved. The system comprises a plurality of fans, the outlet ends of the fans are provided with adjustable airflow channel structures, the structures can change the effective ventilation area of the outlets of the fans through relative movement of internal structures, and the system is further provided with a driving module, an angle sensor and a control system. The control system is in communication with a wind speed sensor, a pollutant concentration sensor and a traffic flow detection unit which are arranged in a fan associated area, and is configured to receive monitoring data and angle feedback in real time, calculate a target ventilation area through a preset algorithm, convert the target ventilation area into a target angle of the driving module, and further control the adjustable airflow channel structure to act, so that the target angle is adjusted. And closed-loop control is formed, so that on-demand accurate control of tunnel ventilation is realized, and the purposes of energy conservation and high efficiency are achieved.

The application relates to the technical field of tunnel ventilation, and particularly discloses an ultra-long tunnel waste gas collecting, compressing and conveying system for longitudinal ventilation of a tunnel, which comprises a tunnel, a plurality of waste gas compressing systems, a high-pressure exhaust pipe and a discharge port, the plurality of waste gas compressing systems are arranged at intervals along the tunnel, each waste gas compressing system comprises an exhaust port, an air compressor and an electric air valve, the exhaust port is connected with an air inlet of the air compressor, an air outlet of the air compressor is connected with an air inlet of the electric air valve, an air outlet of the electric air valve is connected with the high-pressure exhaust pipe, the high-pressure exhaust pipe is connected with the discharge port, the waste gas compressing system collects waste gas generated in the tunnel and then compresses the waste gas, and the waste gas is discharged outside through the high-pressure exhaust pipe and the discharge port. The application compresses the collected waste gas, effectively reduces the volume of the waste gas, and then rapidly discharges the waste gas outside through the high-pressure exhaust pipe, so that the ventilation efficiency is greatly improved, and the application is particularly suitable for ultra-long tunnels and has the outstanding advantages of low civil engineering cost and small construction difficulty.

The utility model provides a ventilation pipe adjusting device suitable for blasting excavation of a tunnel, which comprises a slide way arranged in the tunnel along the extending direction of the tunnel, a ventilation pipe in the tunnel is of a telescopic hose structure, the front part of the ventilation pipe is connected to the slide way in a sliding manner, and an air outlet of the ventilation pipe is provided with a limiting structure for fixing the position of the air outlet. The tunnel ventilation device is convenient to install and operate, the ventilation pipe is of a telescopic hose structure, the front portion of the ventilation pipe can slide front and back in a tunnel and be compressed, the position of the ventilation pipe is adjusted, and the problems that when the tunnel is excavated through a blasting method, the ventilation pipe is too close to the tunnel face, and consequently the ventilation pipe is damaged by blasting shock waves and flying stones are solved; and finished ventilation pipeline products can be protected.