US3919930A - Air circulating apparatus for use in tunnels - Google Patents

Air circulating apparatus for use in tunnels Download PDF

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Publication number
US3919930A
US3919930A US415647A US41564773A US3919930A US 3919930 A US3919930 A US 3919930A US 415647 A US415647 A US 415647A US 41564773 A US41564773 A US 41564773A US 3919930 A US3919930 A US 3919930A
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US
United States
Prior art keywords
air
carriage
tunnel
supply duct
duct means
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.)
Expired - Lifetime
Application number
US415647A
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English (en)
Inventor
Masahiro Yoshikawa
Yoshio Matsuoka
Kiyotaka Takamatsu
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.)
Mitsui Engineering and Shipbuilding Co Ltd
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Mitsui Engineering and Shipbuilding Co Ltd
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 Mitsui Engineering and Shipbuilding Co Ltd filed Critical Mitsui Engineering and Shipbuilding Co Ltd
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Publication of US3919930A publication Critical patent/US3919930A/en
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    • 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
    • E21F1/006—Ventilation at the working face of galleries or tunnels
    • 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
    • E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
    • E21F17/02—Suspension devices for tubes or the like, e.g. for ventilating ducts

Definitions

  • the air circulating apparatus comprises a movable carriage in the form of an arch, an air supply duct mounted on the carriage and provided with an air discharge port for forming an air curtain across the tunnel, and an exhaust duct mounted on the carriage and projecting forwardly.
  • the carriage is provided with crawlers so as to be movable. A sufficient space is left beneath the carriage and the air supply duct for free passage of vehicles.
  • An object of this invention is to provide an improved apparatus for circulating fresh air in a tunnel and capable of efficiently exhausting gas evolved not only near the working face but also in the other portions of the tunnel as well as contaminated air and for substituting fresh air.
  • Yet another object of this invention is to provide a novel air circulating apparatus which is capable of moving to and from the portion in a tunnel that requires air circulation and also is capable of tightly sealing the gap between the apparatus and the inner wall of the tunnel in order to minimize air leakage therebetween.
  • air circulating apparatus for use in a tunnel, comprising a movable carriage, an air supply duct mounted on the carriage and provided with an air discharge port arranged to form an air curtain across the tunnel, and an exhaust duct mounted on the carriage and projecting forwardly beyond the air discharge port of the air supply duct.
  • the carriage and'the air supply duct extend along the side and upper inner walls of the tunnel so that a suffrcient space is left beneath them to allow free passage of vehicles and workmen while the apparatus is in operation.
  • An inflatable air bag is mounted on the carriage for air tightly sealing the gap between the carriage and the inner walls of the tunnel.
  • FIG. 3 is a front view of the apparatus shown in FIG. 1;
  • FIG. 4 is a plan view of an alternate form of the apparatus shown in FIG. 2.
  • the apparatus shown in the accompanying drawing comprises a carriage 1 having a frame work 1a formed in the form of an arch (see FIG. 3) and extending along the side and upper surfaces of tunnel 2.
  • the carriage 1 is provided with wheels or crawlers 3 at the lower portion on both sides for running through the tunnel.
  • An air supply duct 4 is mounted on the carriage 1.
  • the duct 4 is in the form of an arch extending along the side and upper surfaces of the tunnel 2 and is formed with a narrow air discharge slot 5 on the lower surface.
  • the supply end of the air duct 4 is connected to a flexible air duct 6 to receive fresh air from a blower, not shown.
  • An exhaust duct .7 is mounted on the carriage and extends along the side and upper surfaces of the tunnel and then projects forwardly (to the left as viewed in FIG. 1) at the center of the top of the carriage.
  • the exhaust duct 7 is provided with a wide suction port 8 at its outer end.
  • the suction pipe 9 of said exhaust duct 7 and provided with the suction port 8 is made independent of the duct 7 and is telescoped thereto.
  • the other end of the exhaust duct 7 is connected to an air duct 10 which is free to expand and contract for exhausting gas and air to the outside by an exhausting device not shown.
  • the air circulating apparatus of this invention operates as follows: Firstly crawlers 3 are operated to move the apparatus through the tunnel near the working face 11. Then, outside air is supplied to air supply duct 4 through air conduit 6 by operating a blower, not shown. The air supplied to the air supply duct 4 is ejected toward the lower surface of the tunnel through narrow air discharge slot 5 provided for the lower surface of the air duct 4. The air thus ejected forms an air curtain substantially across the entire cross section the tunnel 2 to interrupt air flows between portions in front of and to the rear of this air curtain. In this manner, the working face in the tunnel is isolated by the air curtain to form a small chamber 12. Consequently, gas evolved in chamber 12 at or near the working face is restrained throughout the remainder of the tunnel leading to the work face. Conversely, if there is gas in the tunnel, it is prevented from diffusing into the working face area defined by chamber 2 and is prevented from diffusing.
  • An inflatable air bag 14 is mounted on the carriage 1 for sealing the gap between the apparatus and the inner wall of the tunnel 2, thus preventing more effectively the diffusion of any gas and assuring a positive flow of fresh air to the chamber 12 and withdrawal of substanally, if an elongated air discharge pipe 17 is connected to one end of air duct 14 as shown in FIG. 4, it can be extended closer to the working face for positively supplying fresh air thereto and more efficiently circulate arr.
  • the ventilating apparatus can advance with the working face and retract by a safe distance at the time of explosion of explosives because it is provided with crawlers 3.
  • the invention provides efficient air circulating apparatus capable of effectively exhausting gas evolved in a tunnel or contaminated air to the outside of the tunnel and can permit free passage of personnel and vehicles.
  • While the invention has been shown and described in connection with a preferred embodiment thereof it with a framework having upper and side wall members designed to fit within a tunnel and defining a passageway therebetween and said air supply duct means having a corresponding configuration, means for supplying fresh air to the air supply duct means, said air supply duct means including air discharge port means for forming a fresh air curtain across the passageway defined by the framework and air supply duct means, exhaust duct means mounted on safe carriage and pro- 10 jecting forwardly beyond the fresh air curtain for exhausting gases and stale air from space closed by the fresh air curtain, and means mounted on said framework for forming a substantially airtight seal between the framework and the sides and roof of a tunnel or other enclosed space in which the apparatus is used.
  • An air circulating apparatus according to claim 1 wherein said carriage is provided with a pair of crawlers at the bottom on both sides thereof and a passageway is provided therebetween to accommodate passage of personnel and vehicles.
  • An air circulating apparatus according to claim 2 wherein said air discharge port means comprises a narrow arcuate slot formed in the undersurface of the air supply duct means for forming the fresh air curtain across the passageway.
  • An air circulating apparatus according to claim 4 wherein said air supply duct means includes an additional air discharge supply pipe extending forwardly into the space closed by the fresh air curtain.
  • An air circulating apparatus according to claim 5 further comprising blower means mounted on said carriage for supplying fresh air to said air supply duct means.
  • An air circulating apparatus according to claim 6 wherein said airtight seal forming means comprises an inflatable air bag adapted to seal the gap between said upper and side members of the framework and the inner roof and sidewalls of a tunnel or other enclosed space in which the apparatus is used.

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)
  • Lining And Supports For Tunnels (AREA)
US415647A 1972-11-22 1973-11-14 Air circulating apparatus for use in tunnels Expired - Lifetime US3919930A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11728872A JPS5418495B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-11-22 1972-11-22

Publications (1)

Publication Number Publication Date
US3919930A true US3919930A (en) 1975-11-18

Family

ID=14708020

Family Applications (1)

Application Number Title Priority Date Filing Date
US415647A Expired - Lifetime US3919930A (en) 1972-11-22 1973-11-14 Air circulating apparatus for use in tunnels

Country Status (7)

Country Link
US (1) US3919930A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5418495B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE807589A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2208029B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1405683A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IT (1) IT999469B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
SE (1) SE384701B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4565674A (en) * 1984-02-10 1986-01-21 Washington Research Foundation Alumina chlorination
US5188427A (en) * 1991-06-13 1993-02-23 Tamrock World Corporation N. V. Twin scrubber and air diffuser for a continuous miner and method of ventilation
JP2015212462A (ja) * 2014-05-01 2015-11-26 大成建設株式会社 トンネル換気方法
CN109277218A (zh) * 2018-10-31 2019-01-29 西安科技大学 一种矿用离子液体阻化剂喷洒装置及喷洒方法
CN112253245A (zh) * 2020-11-03 2021-01-22 成都市建筑设计研究院 一种地铁轨行区侧墙设备运输门洞封堵结构

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52120526A (en) * 1976-04-05 1977-10-11 Obayashi Gumi Kk Ventilation device in pit in tunnel construction
JPS5376530A (en) * 1976-12-17 1978-07-07 Asanuma Gumi Kk Method of improving working environment in tunnel
JPS5376529A (en) * 1976-12-17 1978-07-07 Asanuma Gumi Kk Method of removing powder dust in tunnel works
JPH0462300A (ja) * 1990-06-29 1992-02-27 Katsuya Matsuo トンネル工事用換気方法、及びそれに用いる風管
JP5757758B2 (ja) * 2011-03-25 2015-07-29 株式会社大林組 切羽封じ込め方法
JP5859096B2 (ja) * 2014-11-10 2016-02-10 株式会社大林組 切羽封じ込め装置
CN106401644B (zh) * 2016-10-27 2018-11-30 石家庄铁道大学 一种寒区隧道空气幕保温加热系统
CN107060865B (zh) * 2017-04-28 2023-05-26 长江勘测规划设计研究有限责任公司 轨道交通全封闭站台门辅助排烟系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1443286A (en) * 1921-04-25 1923-01-23 Walter I Smith Method of cleaning tunnels, subways, or the like
US1578814A (en) * 1925-04-03 1926-03-30 D Ascenzo Angelo Method for removing gas and dust from mines
US1982470A (en) * 1933-05-18 1934-11-27 Franks Wilbur Rounding Method of cleaning air in enclosed spaces
US3320765A (en) * 1966-02-18 1967-05-23 Rollin S Chapple Mine cooling unit
US3464756A (en) * 1967-11-15 1969-09-02 Burgess James V Jun Ventilation control system
US3558193A (en) * 1968-02-09 1971-01-26 Greenside Machine Co Ltd Tunnelling or mining machine canopy with ventilation ducts

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1443286A (en) * 1921-04-25 1923-01-23 Walter I Smith Method of cleaning tunnels, subways, or the like
US1578814A (en) * 1925-04-03 1926-03-30 D Ascenzo Angelo Method for removing gas and dust from mines
US1982470A (en) * 1933-05-18 1934-11-27 Franks Wilbur Rounding Method of cleaning air in enclosed spaces
US3320765A (en) * 1966-02-18 1967-05-23 Rollin S Chapple Mine cooling unit
US3464756A (en) * 1967-11-15 1969-09-02 Burgess James V Jun Ventilation control system
US3558193A (en) * 1968-02-09 1971-01-26 Greenside Machine Co Ltd Tunnelling or mining machine canopy with ventilation ducts

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4565674A (en) * 1984-02-10 1986-01-21 Washington Research Foundation Alumina chlorination
US5188427A (en) * 1991-06-13 1993-02-23 Tamrock World Corporation N. V. Twin scrubber and air diffuser for a continuous miner and method of ventilation
JP2015212462A (ja) * 2014-05-01 2015-11-26 大成建設株式会社 トンネル換気方法
CN109277218A (zh) * 2018-10-31 2019-01-29 西安科技大学 一种矿用离子液体阻化剂喷洒装置及喷洒方法
CN112253245A (zh) * 2020-11-03 2021-01-22 成都市建筑设计研究院 一种地铁轨行区侧墙设备运输门洞封堵结构

Also Published As

Publication number Publication date
FR2208029A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-06-21
IT999469B (it) 1976-02-20
JPS5418495B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1979-07-07
FR2208029B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1978-12-01
SE384701B (sv) 1976-05-17
DE2358130A1 (de) 1974-05-30
BE807589A (fr) 1974-03-15
DE2358130B2 (de) 1976-05-13
GB1405683A (en) 1975-09-10
JPS4973843A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-07-17

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