CN115726829A - Ventilation structure that branch tunnel wind regime moves inwards - Google Patents
Ventilation structure that branch tunnel wind regime moves inwards Download PDFInfo
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- CN115726829A CN115726829A CN202211359631.3A CN202211359631A CN115726829A CN 115726829 A CN115726829 A CN 115726829A CN 202211359631 A CN202211359631 A CN 202211359631A CN 115726829 A CN115726829 A CN 115726829A
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- 238000009423 ventilation Methods 0.000 title claims abstract description 32
- 238000007789 sealing Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses a ventilation structure for inward movement of a branch tunnel air source, which comprises a main tunnel, a branch tunnel, a shielding air door, an axial flow fan and a jet flow fan, wherein the main tunnel is provided with a plurality of branch holes; the shielding air door is arranged at a branch hole end at the joint of the main hole and the branch hole to separate the main hole from the branch hole; and the jet fan is arranged in the branch hole and sends fresh air outside the hole to the shielding air door through the branch hole. The ventilation structure with the inward-moving wind source of the branch tunnel cancels a wind tube channel of the branch tunnel, a certain number of jet fans are arranged in the branch tunnel to send fresh wind outside the tunnel to a shielding air door at the tail end of the branch tunnel, and an axial flow fan of the main tunnel takes wind from the shielding air door and directly sends the wind to a tunnel face, so that the wind channel bending section of the axial flow fan is avoided, the wind resistance is reduced, and the ventilation effect is enhanced. The branch holes and the main holes are separated, so that the return air is discharged out of the holes through the adjacent main hole sections, the circulation of the ventilation return air is good, and the whole ventilation effect of the tunnel is enhanced.
Description
Technical Field
The invention relates to a ventilation structure for inward movement of a branch tunnel wind source, and belongs to the technical field of tunnel construction.
Background
In recent years, with the rapid development of the infrastructure of China, a large amount of long and large tunnel projects emerge, a certain number of branch holes are often arranged on an overlong tunnel, and a certain angle deviation exists between the branch holes and a main hole.
At present, the tunnel ventilation is generally set up the fan at a branch tunnel mouth, directly supplies air to main tunnel face, because the angular deviation of branch tunnel and main tunnel causes the ventilation passageway to have the turn angle degree, and the windage is big and the dryer pressure-bearing is serious, seriously influences the ventilation effect.
Disclosure of Invention
The invention provides a ventilation structure for inward movement of a branch tunnel wind source.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a ventilation structure with an inward-moving branch hole wind source comprises a main hole, branch holes, shielding air doors, an axial flow fan and a jet flow fan; the shielding air door is arranged at a branch hole end at the joint of the main hole and the branch hole to separate the main hole from the branch hole; the jet fan is arranged in the branch hole and used for sending fresh air outside the hole to the shielding air door through the branch hole; the axial flow fan is arranged at the tail end of the branch hole and is positioned in the main hole, a hard air cylinder is arranged at the front end of the axial flow fan, and fresh air is sucked from the side of the branch hole at the shielding air door; the rear end of the axial flow fan is provided with a soft air duct which extends along with the extension of the tunnel face, fresh air is delivered to the tunnel face of the main tunnel, the fresh air at the shielding air door is delivered to the tunnel face of the main tunnel through the hard air duct, and the fresh air is returned to the tunnel face through the main tunnel and is exhausted out of the tunnel through the adjacent tunnel section.
Preferably, the distance of the branch tunnel is within 6km, jet flow fans are uniformly arranged every 1.5km or so, and the jet flow fans operate synchronously.
Preferably, the jet fan located at the end of the branch hole is kept at a distance of 300m from the shielding damper.
Preferably, an opening for a hard air duct of the axial flow fan to penetrate is formed above the shielding air door, and a movable door is arranged below the shielding air door and used for a vehicle to enter and exit.
Preferably, the shielding air door is arranged at the tail end of the branch hole, the number of the shielding air doors is 2, and the size of the shielding air doors is matched with the cross section of the branch hole.
Preferably, the branch hole is provided with a corresponding continuous belt, a water pipe and a cable channel, and corresponding sealing measures are taken.
Compared with the prior art, the ventilation structure for the inward movement of the air source of the branch tunnel eliminates an air duct channel of the branch tunnel, a certain number of jet fans are arranged in the branch tunnel to send fresh air outside the tunnel to the shielding air door at the tail end of the branch tunnel, and the axial flow fan of the main tunnel takes air from the shielding air door and directly sends the air to the tunnel face, so that the air duct bending section of the axial flow fan is avoided, the air resistance is reduced, and the ventilation effect is enhanced. The branch holes are separated from the main holes, so that the return air is discharged out of the holes through the adjacent main hole sections, the ventilation return air circulation is good, and the whole ventilation effect of the tunnel is enhanced.
Drawings
Fig. 1 is a sectional view of a ventilation structure in which a branch tunnel wind source is moved inward according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1, the ventilation structure for inward movement of the branch tunnel air source comprises a main tunnel 1, a branch tunnel 2, a shielding air door 3, an axial flow fan 4 and a jet flow fan 5; the shielding air door 3 is arranged at the end of the branch hole 2 at the joint of the main hole 1 and the branch hole 2, and separates the main hole 1 from the branch hole 2; the jet fan 5 is arranged in the branch hole 2 and sends fresh air outside the hole to the shielding air door 3 through the branch hole 2; the axial flow fan 4 is arranged at the tail end of the branch tunnel 2 and is positioned in the main tunnel 1.
A hard air duct 41 with the length of about 20m is arranged at the front end of the axial flow fan 4, and fresh air is sucked from the side of the branch hole 2 at the shielding air door 3; the rear end of the axial flow fan 4 is provided with a soft air duct 42, the soft air duct 42 extends along with the extension of the tunnel face 11, and the fresh air is sent to the tunnel face 11 of the main tunnel 1.
Fresh air at the shielding air door 3 is delivered to the tunnel face 11 of the main tunnel 1 through the hard air duct 41, and the fresh air returns to the tunnel face 11 through the main tunnel 1 and is discharged out of the tunnel through the adjacent tunnel sections.
The distance between the branch holes 2 is not too long (within 6 km), the jet flow fans 5 are uniformly arranged every 1.5km or so to synchronously operate, the effect of series ventilation is achieved, and an air source is provided for the jet flow fans 4;
the shielding air doors 3 are arranged at the tail ends of the branch holes 2, the number of the shielding air doors 3 is set according to the material and the sealing effect, 2 shielding air doors 3 are arranged, and the size of each shielding air door is matched with the section of each branch hole 2;
an opening for the hard air duct 41 of the axial flow fan 4 to pass through is formed above the shielding air door 3, and the hard air duct 41 is sealed after being installed so as to ensure the sealing effect of the shielding air door 3; a movable door is arranged below the shielding air door 3 for a vehicle to enter and exit, the movable door is opened when the vehicle enters and exits, and the movable door is closed after the vehicle passes through;
the branch hole 2 is provided with corresponding continuous belts, water pipes and cable channels, and corresponding sealing measures are made;
the axial flow fan 4 can be additionally provided with a relay fan according to the ventilation distance of the main tunnel 1, the air quantity required by the tunnel face 11 and the like;
the jet fan 5 at the tail end of the branch hole 2 and the shielding air door 3 are kept at a distance of about 300m, so that the shielding air door 3 is prevented from being damaged by wind pressure.
The ventilation structure with the inward-moving branch tunnel air source cancels an air duct channel of the branch tunnel 2, a certain number of jet fans 5 are arranged in the branch tunnel 2 to send fresh air outside the tunnel to the shielding air door 3 at the tail end of the branch tunnel 2, and the axial flow fan 4 of the main tunnel 1 takes air from the shielding air door 3 and directly sends the air to the tunnel face 11 to avoid the air duct bending section of the axial flow fan 4, reduce the air resistance and enhance the ventilation effect. The branch holes 2 are separated from the main holes 1, so that the return air is discharged out of the holes through the adjacent main hole 1, the ventilation return air circulation is good, and the whole ventilation effect of the tunnel is enhanced.
Finally, it should be noted that: the above examples are merely illustrative of the technical solutions of the present invention, and not limitative thereof; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A ventilation structure with a branch tunnel air source moving inwards is characterized by comprising a main tunnel (1), a branch tunnel (2), a shielding air door (3), an axial flow fan (4) and a jet flow fan (5); the shielding air door (3) is arranged at the end of the branch hole (2) at the joint of the main hole (1) and the branch hole (2) to separate the main hole (1) from the branch hole (2); the jet fan (5) is arranged in the branch hole (2) and sends fresh air outside the hole to the shielding air door (3) through the branch hole (2); the axial flow fan (4) is arranged at the tail end of the branch hole (2) and is positioned in the main hole (1).
2. The ventilation structure for moving the branch tunnel air source inwards according to the claim 1, characterized in that a hard wind tube (41) is arranged at the front end of the axial flow fan (4), and fresh air is sucked from the side of the branch tunnel (2) at the shielding air door (3); the rear end of the axial flow fan (4) is provided with a soft air duct (42) which extends along with the extension of the tunnel face (11), fresh air is delivered to the tunnel face (11) of the main tunnel (1), the fresh air at the shielding air door (3) is delivered to the tunnel face (11) of the main tunnel (1) through a hard air duct (41), and the fresh air is returned to the tunnel face (11) through the main tunnel (1) and is exhausted out of the tunnel through an adjacent tunnel section.
3. The ventilation structure for the inward movement of the branch tunnel wind source according to claim 1, characterized in that the distance between the branch tunnels (2) is less than 6km, and jet flow fans (5) are uniformly arranged at intervals of about 1.5km for synchronous operation.
4. A ventilation structure for moving the wind source in the branch tunnel according to claim 1, characterized in that the jet fan (5) at the end of the branch tunnel (2) is kept at a distance of 300m from the shield damper (3).
5. The ventilation structure for the inward movement of the branch tunnel air source according to claim 1, wherein an opening for a hard air duct (41) of the axial flow fan (4) to pass through is formed above the shielding air door (3), and a movable door is arranged below the shielding air door (3) for a vehicle to pass in and out.
6. A ventilation structure for moving inwards of a branch tunnel wind source according to claim 1 is characterized in that the shielding air door (3) is arranged at the tail end of the branch tunnel (2), and the shielding air door (3) has 2 passages and is matched with the section of the branch tunnel (2) in size.
7. A ventilation structure for inward movement of a branch tunnel wind source as claimed in claim 1, wherein the branch tunnel (2) is provided with corresponding continuous belts, water pipes and cable channels, and corresponding sealing measures are taken.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211359631.3A CN115726829A (en) | 2022-11-02 | 2022-11-02 | Ventilation structure that branch tunnel wind regime moves inwards |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211359631.3A CN115726829A (en) | 2022-11-02 | 2022-11-02 | Ventilation structure that branch tunnel wind regime moves inwards |
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| CN115726829A true CN115726829A (en) | 2023-03-03 |
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| CN202211359631.3A Pending CN115726829A (en) | 2022-11-02 | 2022-11-02 | Ventilation structure that branch tunnel wind regime moves inwards |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405430A (en) * | 2014-10-08 | 2015-03-11 | 西南交通大学 | Ventilation system and ventilation method for single-cavern large-section extra-long tunnel construction |
| CN205349398U (en) * | 2016-01-21 | 2016-06-29 | 中铁十八局集团隧道工程有限公司 | Air supply system in large and long tunnels hole of supplementary construction of many inclined shafts |
| CN107939435A (en) * | 2017-12-17 | 2018-04-20 | 北京昊华能源股份有限公司 | A kind of coal road dash system |
| CN112145214A (en) * | 2020-09-09 | 2020-12-29 | 中铁三局集团有限公司 | Energy-saving ventilation method for newly-built tunnel construction based on existing railway tunnel and inclined shaft |
| CN114658464A (en) * | 2022-03-30 | 2022-06-24 | 中铁二十局集团第五工程有限公司 | Tunnel ventilation structure for construction of extra-long tunnel |
| CN218844345U (en) * | 2022-11-02 | 2023-04-11 | 中铁十八局集团有限公司 | Ventilation structure for inward movement of branch tunnel wind source |
-
2022
- 2022-11-02 CN CN202211359631.3A patent/CN115726829A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405430A (en) * | 2014-10-08 | 2015-03-11 | 西南交通大学 | Ventilation system and ventilation method for single-cavern large-section extra-long tunnel construction |
| CN205349398U (en) * | 2016-01-21 | 2016-06-29 | 中铁十八局集团隧道工程有限公司 | Air supply system in large and long tunnels hole of supplementary construction of many inclined shafts |
| CN107939435A (en) * | 2017-12-17 | 2018-04-20 | 北京昊华能源股份有限公司 | A kind of coal road dash system |
| CN112145214A (en) * | 2020-09-09 | 2020-12-29 | 中铁三局集团有限公司 | Energy-saving ventilation method for newly-built tunnel construction based on existing railway tunnel and inclined shaft |
| CN114658464A (en) * | 2022-03-30 | 2022-06-24 | 中铁二十局集团第五工程有限公司 | Tunnel ventilation structure for construction of extra-long tunnel |
| CN218844345U (en) * | 2022-11-02 | 2023-04-11 | 中铁十八局集团有限公司 | Ventilation structure for inward movement of branch tunnel wind source |
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