EP4102028A1 - Belüftungssystem für strassentunnel - Google Patents

Belüftungssystem für strassentunnel Download PDF

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Publication number
EP4102028A1
EP4102028A1 EP22176519.1A EP22176519A EP4102028A1 EP 4102028 A1 EP4102028 A1 EP 4102028A1 EP 22176519 A EP22176519 A EP 22176519A EP 4102028 A1 EP4102028 A1 EP 4102028A1
Authority
EP
European Patent Office
Prior art keywords
power supply
fan
actuation apparatus
ventilation system
switching unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22176519.1A
Other languages
English (en)
French (fr)
Inventor
Mario Bruno LANCIANO
Antonio FERNANDEZ ESCANDON ORTIZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Talleres Zitron SA Succursale Italia
Original Assignee
Talleres Zitron SA Succursale Italia
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Talleres Zitron SA Succursale Italia filed Critical Talleres Zitron SA Succursale Italia
Publication of EP4102028A1 publication Critical patent/EP4102028A1/de
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
    • E21F1/003—Ventilation of traffic tunnels

Definitions

  • the present invention relates to a ventilation system for road tunnels.
  • ventilation systems for tunnels comprise speed variators which must be installed in the vicinity of the fans.
  • the level of the characteristics of resistance and reaction to fire of the components of all the plants and systems of the tunnel must take account of their structuring and degree of exposure to fire and of technological possibilities, and it must make it possible to maintain the necessary safety functions in the event of fire.
  • the aim of the present invention is to provide a ventilation system for road tunnels that is capable of solving the above mentioned problems and overcoming the above mentioned limitations of the background art.
  • an object of the present invention is to provide a ventilation system for road tunnels that is capable of ensuring greater reliability in the event of fire.
  • Another object of the invention consists of providing a ventilation system for road tunnels that is capable of reducing consumption and the absorbed power.
  • Another object of the invention consists of providing a ventilation system for road tunnels that is easy to implement and economically competitive.
  • the ventilation system for road tunnels comprises at least one fan 90 which is adapted to be arranged, in a known manner, inside the tunnel.
  • the fan 90 is a fan adapted for the ventilation of road tunnels and comprises, in a known manner, at least one symmetrically- or asymmetrically-bladed impeller (preferably made of stainless steel) and an electric motor that rotates the impeller.
  • the fan 90 also comprises: a fan housing made of stainless sheet steel, a supporting base for the motor, a rigid suspension system, a horizontal level sensor, and a vibration sensor.
  • the ventilation system 1 also comprises a power supply and actuation apparatus 10 which electrically powers the fan 90, and this power supply and actuation apparatus 10 is connected to an electric power supply line 41.
  • This power supply and actuation apparatus 10 comprises an electronic control system which is configured to control the speed and the direction of rotation of the fan 90.
  • This electronic control system in turn comprises an electrical conversion device 30 (such as an inverter) and optionally also an electric switching unit 31, interposed between the power supply line 41 and the fan 90.
  • an electrical conversion device 30 such as an inverter
  • an electric switching unit 31 interposed between the power supply line 41 and the fan 90.
  • the electrical conversion device 30 varies the frequency and/or the amplitude of the electric current in order to actuate and vary the speed of the fan 90.
  • the ventilation system 1 comprises at least one temperature detection device which is positioned in the power supply and actuation apparatus 10 and/or in, or proximately to, the fan 90.
  • the power supply and actuation apparatus 10 comprises a motorized switching unit 20 which is configured to modify, as a function of the temperature detected by the above mentioned temperature detection device, the configuration of the power supply and actuation apparatus 10 from an ordinary configuration to an emergency configuration, and vice versa.
  • the power supply and actuation apparatus 10 powers the fan 90 by means of the electrical conversion device 30 (inverter).
  • the motorized switching unit 20 isolates the electrical conversion device 30, creating (inside the motorized switching unit 20 itself) an electrical bypass so as to supply power directly to the fan 90 from the electrical line 41.
  • the electrical bypass is thermally isolated so as to withstand temperatures higher than 400°C for at least two hours.
  • Figure 1 shows the diagram of the power section of the preferred embodiment of the power supply and actuation apparatus 10.
  • the motorized switching unit 20 is contained inside a textile protection made of mineral wool, or the motorized switching unit 20 itself is configured (using conventional techniques) to withstand a temperature of 400°C for at least two hours.
  • bypass can operate under load at the rated current, at a temperature of 400°C and for a minimum length of time of 2 hours.
  • the motorized switching unit 20 further makes it possible to actuate the fan 90 in both directions of rotation.
  • the power supply and actuation apparatus 10 is accommodated inside a box-like body 11 made of sheet metal 11 (preferably stainless steel) provided with a thermal insulation layer (inside the sheet metal).
  • sheet metal 11 preferably stainless steel
  • thermal insulation layer inside the sheet metal
  • the box-like body of sheet metal 11 is a stainless steel structure and its dimensions are 800mm x 1400mm x 450mm, but the dimensions can vary depending on the power installed and/or on the dimensions of the elements installed inside.
  • a temperature detection device which is positioned proximately to the fan 90 in order to detect the temperature proximate to such fan 90 and which is functionally connected to the electronic control system, so that if the temperature at which the fan 90 operates exceeds a threshold value (for example 55-60°C) the electronic control system induces, by way of the motorized switching unit 20, the switchover to the emergency configuration.
  • a threshold value for example 55-60°C
  • an emergency command is sent remotely to the power supply and actuation apparatus 10, and the latter, by means of the motorized switching unit 20, performs the switchover from ordinary configuration (actuation by inverter) to emergency configuration (bypass).
  • the emergency command is also associated with a command governing the direction of rotation of the fan 90.
  • the power supply and actuation apparatus 10 also comprises a thermostat, which comprises a respective temperature detection device inside the box-like body 11, which is configured to actuate the motorized switching unit 20 in order to provide the emergency configuration when the detected temperature is equal to or higher than a threshold temperature (preferably 55-60°C).
  • a threshold temperature preferably 55-60°C.
  • the direction of rotation of the impeller of the fan 90 will be the direction in which the fan was rotating during the last start.
  • the motorized switching unit 20 comprises a motor 21 and a series of switches 23 actuated by the motor 21.
  • Figures 2 , 3 and 4 show an example of a box-like body 11 containing the power supply and actuation apparatus 10.
  • the latter comprises conventional interface elements 18, 19 (switches, button panel for controlling the electronic control system, etc.) and aeration grilles 12.
  • the power supply and actuation apparatus 10 is adapted to be connected to a network (MODBUS protocol) for remote control and transmission of information (current, voltage, direction of rotation, hours of operation power factor, energy consumption, vibrations).
  • a network MODBUS protocol
  • the box-like body 11 has a housing made of stainless steel with an IP55 protection rating, and is resistant to the action of chemical agents, to shocks and to vibrations, with switch and circuit breaker.
  • the power supply and actuation apparatus 10 has the following characteristics:
  • the power supply and actuation apparatus 10 also comprises analog and/or digital inputs for carrying out the monitoring of the fan (using a temperature sensor, vibration sensor, horizontal level sensor etc.).
  • the ventilation system 1 for road tunnels can comprise a plurality of fans 90, positioned at various zones of the tunnel, each one provided with a respective power supply and actuation apparatus 10.
  • the fans 90 located inside the tunnel can all start together with the speed variators in order to eliminate the gases under normal conditions of transit or when vehicles are stopped owing to an accident that does not result in fire.
  • the electronic control system of the power supply and actuation apparatus 10 regulates the rotation speed of the fan 90 in terms of number of rpm and in the most suitable direction of flow, based on the environmental conditions.
  • the fans 90 In the presence of fire, with the fans 90 operating, the fans will be regulated as a function of the location and characteristics of the fire.
  • the fans located at the point where the fire is located will operate under normal conditions up to a threshold temperature (for example 55-60°C), detected by the detection device temperature, after which, by way of the motorized switching unit 20, the switchover to the emergency configuration (direct operation) will be effected, operating under these conditions up to 400°C for a maximum length of time of two hours.
  • a threshold temperature for example 55-60°C
  • the fans 90 that are located outside the zone where the fire is located are started in the ordinary configuration, and the fans that are located in the zone of the fire and/or with a temperature higher than 55-60°C are started in the emergency configuration, as they can operate under these conditions at up to 400°C for two hours.
  • fans 90 are controlled by a central system control unit which, by way of programs that receive information from pressure sensors, temperature sensors, environmental pollution sensors, or other physical, chemical or environmental parameters, located inside the tunnel and which, through a bus connection provided with fire-resistant cables or optic fibers, after analyzing all the parameters, set the speed and correct directions for operation under optimal conditions from the point of view of safety and the energy consumption, for example as described above.
  • a central system control unit which, by way of programs that receive information from pressure sensors, temperature sensors, environmental pollution sensors, or other physical, chemical or environmental parameters, located inside the tunnel and which, through a bus connection provided with fire-resistant cables or optic fibers, after analyzing all the parameters, set the speed and correct directions for operation under optimal conditions from the point of view of safety and the energy consumption, for example as described above.
  • This control unit in practice comprises a programmable electronic apparatus and is functionally connected to the power supply and actuation apparatuses 10 of each fan 90 so as to control them.
  • the ventilation system for road tunnels achieves the intended aim and objects in that it is capable of ensuring greater reliability in the event of fire.
  • Another advantage of the ventilation system for road tunnels consists in that it reduces consumption and the absorbed power and also the noise levels.
  • Another advantage of the ventilation system for road tunnels, according to the invention, consists in that it is easy to implement and economically competitive.
  • Another advantage of the ventilation system for road tunnels consists in that it ensures permanent control of the air flow.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Ventilation (AREA)
EP22176519.1A 2021-06-10 2022-05-31 Belüftungssystem für strassentunnel Pending EP4102028A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT202100015140 2021-06-10

Publications (1)

Publication Number Publication Date
EP4102028A1 true EP4102028A1 (de) 2022-12-14

Family

ID=77627330

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22176519.1A Pending EP4102028A1 (de) 2021-06-10 2022-05-31 Belüftungssystem für strassentunnel

Country Status (1)

Country Link
EP (1) EP4102028A1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191016309A (en) * 1910-07-08 1911-07-10 Waygood & Company Ltd R Improvements in or relating to Hydraulic Lifts, Cranes and the like.
JP2010265655A (ja) * 2009-05-13 2010-11-25 Sohatsu System Kenkyusho:Kk 長距離道路トンネル用換気制御システム
EP2827215A1 (de) * 2012-03-14 2015-01-21 Talleres Zitrón, S.A. System und methode zur elektronischen regelung der drehzahl eines lüfterrads
EP3000663A1 (de) * 2014-04-09 2016-03-30 Talleres Zitrón, S.A. System zur erfassung und überwachung elektrischer und pneumatischer signale aus lüftungseinrichtungen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191016309A (en) * 1910-07-08 1911-07-10 Waygood & Company Ltd R Improvements in or relating to Hydraulic Lifts, Cranes and the like.
JP2010265655A (ja) * 2009-05-13 2010-11-25 Sohatsu System Kenkyusho:Kk 長距離道路トンネル用換気制御システム
EP2827215A1 (de) * 2012-03-14 2015-01-21 Talleres Zitrón, S.A. System und methode zur elektronischen regelung der drehzahl eines lüfterrads
EP3000663A1 (de) * 2014-04-09 2016-03-30 Talleres Zitrón, S.A. System zur erfassung und überwachung elektrischer und pneumatischer signale aus lüftungseinrichtungen

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BASSLER AXEL ET AL: "Dynamic Tunnel Model - Current Practice", 12 June 2018 (2018-06-12), pages 1 - 9, XP055894683, Retrieved from the Internet <URL:https://tunnel-graz.at> [retrieved on 20220223] *
JAVIER LUIS ET AL: "Variable Pitch Fans Evolution Proofing Underground Works", 1 December 2020 (2020-12-01), pages 1 - 23, XP055894612, Retrieved from the Internet <URL:https://tunnel-graz.at> [retrieved on 20220223] *

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