Title:
NEGATIVE PRESSURE WAVE GENERATOR
Document Type and Number:
Japanese Patent JP2018024986
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a negative pressure wave generator capable of satisfactorily reducing tunnel micro pressure wave by expanding negative pressure wave generation time.SOLUTION: A negative pressure wave generator 1 is for cancelling a tunnel micro pressure wave W2 which is a positive pulse wave by means of a negative pressure wave W3 as a negative pulse wave. The negative pressure wave W3, which is generated as a negative pulse, is caused to interfere with the tunnel micro pressure wave W2 which is output in a pulse state to the outside from an outlet 102 of a tunnel 100. The negative pressure wave generator includes: a vacuum vessel 11 capable of maintaining the inside thereof in a vacuum state; an opening 23 which opens to the vacuum vessel 11; a valve body 12 which opens and closes the opening 23 to the inside of the vacuum vessel 11; and a servo motor 16 that controls opening speed of the valve body 12.SELECTED DRAWING: Figure 1
Inventors:
TAKEI YOSHIKO
KUDO TOSHIFUMI
YAMAMOTO KENTA
KIMURA NORIYUKI
GOTO TAKASHI
YAMAMOTO TATSUYA
KUDO TOSHIFUMI
YAMAMOTO KENTA
KIMURA NORIYUKI
GOTO TAKASHI
YAMAMOTO TATSUYA
Application Number:
JP2016155410A
Publication Date:
February 15, 2018
Filing Date:
August 08, 2016
Export Citation:
Assignee:
MITSUBISHI HEAVY IND MACH SYSTEMS LTD
HIGASHI NIPPON RYOKAKU TETSUDO
HIGASHI NIPPON RYOKAKU TETSUDO
International Classes:
E21F1/00; E21D9/14; E21F17/00
Attorney, Agent or Firm:
Toshiro Mitsuishi
Mitsuishi Shunpei
Yasuyuki Tanaka
Hiroshi Matsumoto
Tetsuzo Yamada
Mitsuishi Shunpei
Yasuyuki Tanaka
Hiroshi Matsumoto
Tetsuzo Yamada