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CN-122013624-A - Ventilation subgrade wind collecting device and system

CN122013624ACN 122013624 ACN122013624 ACN 122013624ACN-122013624-A

Abstract

The invention relates to the technical field of ventilation regulation and control of frozen soil roadbed, and discloses a ventilation roadbed wind collecting device which comprises a wind guide channel, a wind collecting cover and a wind collecting device, wherein the outlet end of the wind guide channel is communicated with a ventilation structure in a roadbed main body, the wind collecting cover is rotatably arranged at the inlet end of the wind guide channel around the axial direction of the wind guide channel, the wind collecting cover is provided with an opening for collecting natural wind, and an included angle between the direction of the opening and the extending direction of the roadbed main body is an acute angle. Through above-mentioned setting, the device can effectively collect the natural wind from different directions to improve ventilation roadbed's air inlet efficiency under changeable wind direction condition, and then promote the thermal stability of roadbed.

Inventors

  • PENG DINGMAO
  • LIANG HUI
  • SHU ZONGYUN
  • MAO BIN
  • BAO XIAOMING
  • LIU JUN

Assignees

  • 浙江数智交院科技股份有限公司

Dates

Publication Date
20260512
Application Date
20260410

Claims (10)

  1. 1. A ventilated subgrade wind collection device, comprising: the outlet end of the air guide channel (32) is communicated with the ventilation structure (2) in the roadbed main body (1); the wind collecting cover (31) is rotatably arranged at the inlet end of the wind guide channel (32) around the axial direction of the wind guide channel (32), the wind collecting cover (31) is provided with an opening for collecting natural wind, and an included angle between the direction of the opening and the extending direction of the roadbed main body (1) is an acute angle.
  2. 2. A ventilated subgrade wind catcher as claimed in claim 1, wherein said wind catcher (31) has an arcuate wall surface and a cross-sectional area that tapers from an open end to an end connected to said wind guide channel (32).
  3. 3. A ventilated road bed wind-collecting device according to claim 1, characterized in that the wind-collecting housing (31) is rotatably connected to the inlet end of the wind-guiding channel (32) by means of a sliding rail (313).
  4. 4. A ventilated subgrade wind catcher as claimed in claim 1, wherein the edge of the opening of said wind catcher (31) is provided with an arcuate deflector (311) extending circumferentially of said opening and curving inwardly of said wind catcher (31) for guiding air flow within said wind catcher (31) that flows into the opening without entering said air guide channel (32) back into the interior of said wind catcher (31).
  5. 5. The ventilation and roadbed wind-collecting device according to claim 1, wherein a wind-guiding rib (312) extending from the opening to the inlet end of the wind-guiding passage (32) is provided on the inner wall of the wind-collecting housing (31).
  6. 6. The ventilation and roadbed wind-collecting device according to claim 1, wherein a helical blade extending along the axial direction of the wind-guiding channel (32) is arranged in the wind-guiding channel (32); The channel cross-sectional area of the air guide channel (32) gradually decreases from the inlet end to the outlet end.
  7. 7. The ventilation roadbed wind collecting device according to claim 1, wherein a central wind outlet (33) coaxial with the wind guide channel (32) is arranged at the outlet end of the wind guide channel (32), the central wind outlet (33) is communicated with the wind guide channel (32) and the ventilation structure (2), a wind guide valve (331) is arranged in the central wind outlet (33), the wind guide valve (331) comprises a plurality of valve blades (3311) capable of axially rotating around the wind guide channel (32), and the wind guide valve (331) is used for adjusting the effective ventilation area of the central wind outlet (33) by changing the rotation angle of the valve blades (3311).
  8. 8. The ventilated subgrade wind collection device according to claim 1, further comprising a back wind channel (34), said back wind channel (34) being in communication with the ventilation structure (2) within the subgrade body (1), and said back wind channel (34) being arranged in parallel with said wind guiding channel (32).
  9. 9. A ventilated subgrade wind collection system, comprising: the ventilation structure (2) is arranged in the roadbed main body (1); The ventilated subgrade wind collection device (3) according to any one of claims 1-8, which is arranged outside the subgrade body (1) and is in communication with said ventilation structure (2).
  10. 10. The ventilation roadbed wind collecting system according to claim 9, wherein the ventilation structure (2) is a plurality of ventilation pipelines which are arranged at intervals along the trend of the roadbed, and two ends of each ventilation pipeline are provided with one wind collecting device.

Description

Ventilation subgrade wind collecting device and system Technical Field The invention relates to the technical field of ventilation regulation and control of frozen soil roadbed, in particular to a ventilation roadbed wind collecting device and system. Background In road engineering in frozen soil areas, roadbed structures are influenced by freezing and thawing cycles and ground temperature changes for a long time. Degradation of permafrost may lead to engineering problems such as reduced bearing capacity of the foundation, uneven settlement, and damage to the road surface structure. In order to slow down the degradation of permafrost and maintain the long-term stability of the roadbed structure, ventilation structures such as ventilation pipelines or ventilation rubble layers are usually arranged in the roadbed in engineering practice, and the temperature of the roadbed and the soil body below the roadbed is reduced by utilizing the heat exchange effect between low-temperature air and the foundation. The existing ventilation path is based on natural environment conditions to realize air flow, and the ventilation effect is mainly dependent on the conditions of external wind speed, wind direction and air temperature. The air inlet end of the common ventilation structure usually adopts a straight-through pipe orifice or a simple flaring structure, and the opening direction of the air inlet end is perpendicular to the trend of the roadbed and is consistent with the axial direction of the ventilation pipeline, so that natural wind blown along the axial direction of the pipeline can be effectively collected. However, in the actual engineering environment, the wind direction of natural wind often changes, especially when the wind direction is a certain angle or even parallel with the roadbed trend, namely the wind direction is perpendicular to the axial lateral wind of the pipeline, the conventional straight-through pipe orifice is difficult to effectively collect, so that the air inlet efficiency is obviously reduced, and the regulation and control effect of the ventilation roadbed on the ground temperature is further affected. Disclosure of Invention Aiming at the defects or the defects in the prior art, the invention provides the ventilation roadbed wind collecting device which can effectively collect natural wind from different directions, thereby improving the wind inlet efficiency of the ventilation roadbed under the condition of multiple wind directions and further improving the thermal stability of the roadbed. In order to achieve the above object, the present invention provides a ventilation roadbed wind collecting device, comprising a wind guiding channel, an air guiding channel, a wind guiding device and a wind guiding device, wherein the outlet end of the wind guiding channel is used for communicating with a ventilation structure in a roadbed main body; The wind collecting cover is rotatably arranged at the inlet end of the wind guide channel around the axial direction of the wind guide channel and is provided with an opening for collecting natural wind, and an included angle between the direction of the opening and the extending direction of the roadbed main body is an acute angle. Further, the wind collecting cover is provided with an arc-shaped wall surface, and the cross section area of the wind collecting cover gradually decreases from the opening end to the end connected with the wind guiding channel. Further, the wind collecting cover is rotatably connected to the inlet end of the wind guide channel through a sliding rail. Further, an arc-shaped guide ring extending along the circumferential direction of the opening and bending towards the inside of the air collecting cover is arranged at the edge of the opening of the air collecting cover and used for guiding air flow which does not enter the air guiding channel and flows towards the opening in the air collecting cover back to the inside of the air collecting cover. Further, an air guiding rib extending from the opening to the inlet end of the air guiding channel is arranged on the inner wall of the air collecting cover. Further, a spiral blade extending along the axial direction of the air guide channel is arranged in the air guide channel; The channel cross-sectional area of the air guide channel gradually decreases from the inlet end to the outlet end. Further, a central air outlet coaxial with the air guide channel is arranged at the outlet end of the air guide channel, the central air outlet is communicated with the air guide channel and the ventilation structure, an air guide valve is arranged in the central air outlet and comprises a plurality of valve blades capable of axially rotating around the air guide channel, and the air guide valve is used for adjusting the effective ventilation area of the central air outlet by changing the rotation angle of the valve blades. Further, the wind collecting device further comprises a reverse wind c