Foreign matter removing apparatus at track branch, and nozzle used in the same

Patent metadata

Field	Value
Publication number	US-9315959-B2
Application number	US-201214234439-A
Country	US
Kind code	B2
Filing date	Jul 26, 2012
Priority date	Jul 26, 2011
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

Provided is a foreign matter removing apparatus at a track branch, and a nozzle used in this apparatus that are capable of sufficiently securing foreign matter removing performance as well as significantly reducing generation of noises. In the nozzle for the foreign matter removing apparatus at a track branch, compressed air supplied from piping is injected from each nozzle element. Slits are formed in each nozzle element, a sloped portion is formed at a front end of the nozzle element, and this sloped portion opposes a tongue rail.

First claim

The invention claimed is:

1. A foreign matter removing apparatus at a track branch for removing foreign matters having dropped between a stock rail and a tongue rail at the track branch,
the foreign matter removing apparatus comprising:
a piping unit for supplying compressed air; and
at least one injection nozzle element for injecting the compressed air supplied from the piping unit;
wherein
the injection nozzle element comprises:
a cylindrical housing disposed on an opposite side of the injection nozzle element to the tongue rail, and having a sloped portion approaching more closely to the stock rail toward a nozzle front end of the injection nozzle element; and
slits extending through an inside of the cylindrical housing in a central axis direction thereof so as to inject the compressed air, at least some of the slits opening in the sloped portion, and none of the slits opening toward the stock rail.

2. The foreign matter removing apparatus at a track branch according to claim 1 wherein,
the sloped portion is formed by a plane surface extending from a top surface of the cylindrical housing toward a circumferential side surface thereof.

3. The foreign matter removing apparatus at a track branch according to claim 2 wherein,
the piping unit comprises a rectangular tube disposed on a side surface of the stock rail opposite to the tongue rail,
the injection nozzle element is disposed to one or both of an upper side and a lower side of the piping unit,
and
the plane surface of the sloped portion is provided within a projected area on an upper surface or on a bottom surface of the piping unit.

4. The foreign matter removing apparatus at a track branch according to claim 1 wherein,
the slits are radially arranged at multiple positions around an axial center of the cylindrical housing.

5. The foreign matter removing apparatus at a track branch according to claim 1 wherein,
a plurality of the injection nozzle elements each having the same shape are provided, and
one of the injection nozzle elements has an injection direction different from an injection direction of another of the injection nozzle elements.

6. A nozzle for a foreign matter removing apparatus at a track branch mounted at a track branch of rails so as to remove foreign matters having dropped between rails by injecting compressed air,
the nozzle for a foreign matter removing apparatus at a track branch comprising:
an injection housing of a conical trapezoid disposed at a front position of a crossing section where the rails intersect each other;
one or multiple slits formed in a side surface of the injection housing so as to inject the compressed air toward a back position of the crossing section; and
a guide unit disposed between a compressed air introduction port of the injection housing and the one or multiple slits to guide the compressed air from the compressed air introduction port of the injection housing through an inside of the injection housing to the one or multiple slits.

7. The nozzle for a foreign matter removing apparatus according to claim 6 , wherein
the guide unit has a conical shape.

8. A nozzle used in a foreign matter removing apparatus at a track branch for removing foreign matters having dropped between a stock rail and a tongue rail at the track branch,
the nozzle comprising:
a piping unit for supplying compressed air; and
at least one injection nozzle element for injecting the compressed air supplied from the piping unit;
wherein
the injection nozzle element comprises:
a cylindrical housing disposed on an opposite side of the injection nozzle element to the tongue rail, and having a sloped portion approaching more closely to the stock rail toward a nozzle front end of the injection nozzle element; and
slits extending through an inside of the cylindrical housing in a central axis direction thereof so as to inject the compressed air, at least some of the slits opening in the sloped portion, and none of the slits opening toward the stock rail,
and
a central axis of the injection nozzle element is oriented from a direction along the stock rail toward the tongue rail at a predetermined angle.

Assignees

• Sekihara Takanori
• Sato Masafumi
• Chiba Junichi
• Takahashi Shigeru
• Sato Jun
• Kigami Shogo
• Suzuki Takuya
• Nabtesco Corp

Inventors

• Sekihara Takanori
• Sato Masafumi
• Chiba Junichi
• Takahashi Shigeru
• Sato Jun
• Kigami Shogo
• Suzuki Takuya

Classifications

• E01H8/105 Primary

  Pneumatically or hydraulically loosening, removing or dislodging undesirable matter, e.g. removing by blowing, flushing, suction; Application of melting liquids; Loosening or removing by means of heat, e.g. cleaning by plasma torches, drying by burners (E01H8/125 takes precedence; drying, blowing or liquid-applying devices incorporated in the permanent way E01B19/00; heating or cooling rails during construction or maintenance E01B31/18; wetting or lubricating rails B61K3/00; plasma torches H05H1/26) · CPC title

• B61L1/20

  Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning · CPC title

• E01B7/20

  Safety means for switches, e.g. switch point protectors, auxiliary or guiding rail members · CPC title

• B61L5/00

  Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals (B61L11/00 takes precedence) · CPC title

• E01B19/00 Primary

  Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise (snow fences E01F7/02, snow-ploughs E01H8/02, watering E01H11/00) · CPC title