CN211950572U - System for discharging gas in flat guide - Google Patents
System for discharging gas in flat guide Download PDFInfo
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- CN211950572U CN211950572U CN202020436488.3U CN202020436488U CN211950572U CN 211950572 U CN211950572 U CN 211950572U CN 202020436488 U CN202020436488 U CN 202020436488U CN 211950572 U CN211950572 U CN 211950572U
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- tunnel
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- 238000007599 discharging Methods 0.000 title claims abstract description 13
- 238000009423 ventilation Methods 0.000 claims abstract description 6
- 230000000903 blocking effect Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model discloses a system for simply and effectively discharging gas in a horizontal guide pipe, wherein the included angle alpha between the length direction of a transverse channel and the advancing direction L of a train is an obtuse angle or a right angle; a device for controlling the unidirectional flow of gas is arranged in the transverse channel, and the gas is ensured to flow from the tunnel main tunnel to the tunnel and is guided horizontally; the upper part of the plugging wall is provided with a ventilation opening. The piston wind formed by the train entering the tunnel main tunnel is used for discharging gas in the tunnel horizontal guide, so that the gas is effectively prevented from being gathered. The tunnel has the advantages of cleanness, environmental protection, cost saving and stable gas emission times while ensuring the operation safety of the tunnel.
Description
Technical Field
The utility model relates to a tunnel construction technical field, concretely relates to system for discharging flat inside gas of leading.
Background
The tunnel horizontal guidance refers to a parallel guidance hole of a tunnel main hole, and in most cases, the tunnel horizontal guidance is parallel to the tunnel main hole along the length direction and is vertical to a tunnel inclined shaft. The tunnel horizontal guide positioned on one side of the tunnel main tunnel in the length direction mainly plays an auxiliary role, is a working face additionally arranged for tunnel construction, and can effectively shorten the construction period of a long tunnel or an extra-long tunnel with the length being more than 3000 m. After the tunnel main hole is built, the tunnel is usually blocked for safety. If the tunnel horizontal guide is in a gas enrichment stratum, gas accumulation generates great potential safety hazards for tunnel operation. In the prior art, gas collected in the tunnel flat guide is usually pumped and exhausted by installing an exhaust fan. The suction fan not only consumes a large amount of electric power, but also needs to be periodically maintained. Especially for remote areas, the installation and maintenance of the suction fan is more time consuming and laborious due to the inconvenience of traffic.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a system for discharging gas is simple effectual to discharge and leads inside gas is provided.
The utility model provides a technical scheme that its technical problem adopted is: a system for discharging gas in a horizontal guide comprises a tunnel main tunnel, a tunnel horizontal guide and a transverse channel; the tunnel horizontal guide is arranged on one side of the tunnel main tunnel in the length direction; one end of the transverse channel is communicated with the tunnel main tunnel, and the other end of the transverse channel is communicated with the tunnel horizontal guide; two ends of the tunnel flat guide are respectively provided with a plugging wall; an included angle alpha between the length direction of the transverse channel and the advancing direction L of the train is an obtuse angle or a right angle;
a device for controlling the unidirectional flow of gas is arranged in the transverse channel, and the gas is ensured to flow from the tunnel main tunnel to the tunnel and is guided horizontally;
and a ventilation opening is formed above the plugging wall.
Further, an included angle alpha between the length direction of the transverse channel and the advancing direction L of the train is an obtuse angle.
Further, the device for controlling the one-way flow of the gas comprises a one-way valve;
and an air inlet of the one-way valve corresponds to the tunnel main tunnel, and an air outlet of the one-way valve corresponds to the tunnel horizontal guide.
Furthermore, the two check valves are respectively arranged at two ends of the transverse channel; and a one-way air channel is formed between the two one-way valves.
Further, still include the shutoff piece, the clearance between shutoff check valve outer wall and the cross passage inner wall is shutoff to the shutoff piece.
Further, the plugging piece is a concrete product.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides a system for inside gas is led to simple effectual discharge level of gas emission utilizes the piston wind that the positive hole in train entering tunnel formed to lead the gas discharge in with the tunnel level, prevents effectively that gas from gathering. The tunnel has the advantages of cleanness, environmental protection, cost saving and stable gas emission times while ensuring the operation safety of the tunnel.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of the present invention;
FIG. 3 is an enlarged view of the utility model at A;
FIG. 4 is an enlarged view of the utility model at B;
reference numerals: 1-tunnel main tunnel; 2, tunnel flat guide; 3-a transverse channel; 4-one-way wind channel; 5-a one-way valve; 6-plugging piece; 7-blocking the wall.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in the attached drawings, the system for discharging gas in the horizontal duct comprises a tunnel main hole 1, a tunnel horizontal duct 2 and a transverse channel 3; the tunnel horizontal guide 2 is arranged on one side of the tunnel main hole 1 in the length direction; one end of the transverse channel 3 is communicated with the tunnel main hole 1, and the other end of the transverse channel is communicated with the tunnel flat guide 2; two ends of the tunnel flat guide 2 are respectively provided with a plugging wall 7; an included angle alpha between the length direction of the transverse channel 3 and the advancing direction L of the train is an obtuse angle or a right angle; a device for controlling the unidirectional flow of gas is arranged in the transverse channel 3, and the gas is ensured to flow from the tunnel main hole 1 to the tunnel horizontal guide 2; and a ventilation opening is formed above the plugging wall 7.
When the tunnel is a long tunnel or an extra-long tunnel, due to the blocking and space limitation of the side wall of the tunnel main hole 1, the train runs into the tunnel main hole 1, the locomotive continuously pushes the air in front, the air is compressed due to the extrusion, and the pressure of the air is increased to form piston air. And a negative pressure vortex area is arranged at the tail part of the train, the air pressure of the negative pressure vortex area is lower than that of the front part of the train, and the negative pressure vortex area introduces air outside the tunnel main hole 1 into the tunnel main hole 1 from the entrance of the tunnel main hole 1. Piston wind enters the tunnel flat guide 2 from the transverse channel 3 through a device for controlling the unidirectional flow of gas and provides power for the movement of gas in the tunnel flat guide 2. The density of the gas is less than that of the air, and the gas in the tunnel flat guide 2 is discharged from a vent arranged above the plugging wall 7 under the pushing action of piston wind. The ventilation openings can be arranged on one of the blocking walls 7 or on both blocking walls 7. In the embodiment shown in the figures, the ventilation opening is opened above one of the blocking walls 7.
When the included angle alpha between the length direction of the transverse channel 3 and the train advancing direction L is a right angle, piston wind enters the transverse channel 3 from the tunnel main tunnel 1 under the action of static pressure. The static pressure is low, so that the air quantity entering the transverse channel 3 is limited. In the embodiment shown in the figure, the angle α between the length direction of the cross passage 3 and the train travelling direction L is an obtuse angle. Piston air is introduced into the transverse channel 3 by utilizing dynamic pressure, and the air quantity is large. The value of the angle alpha between the transverse channel 3 and the train travelling direction L is preferably 120 DEG-150 deg.
The device for controlling the unidirectional flow of gas has various specific embodiments: in a first embodiment, the device for controlling the unidirectional flow of gas comprises a baffle, a rotating shaft and a return spring; the baffle is adaptive to the cross section of the transverse channel 3, one end of the baffle is hinged to the inner wall of the transverse channel 3 through a rotating shaft, and the other end of the baffle is a free end. The reset spring is sleeved on the rotating shaft, and the baffle plate closes the transverse channel 3 when piston wind does not exist. After the piston wind is formed, the baffle rotates towards the inner wall direction of the transverse channel 3 around the rotating shaft under the action of the piston wind, and the reset spring is compressed by the baffle and the inner wall of the transverse channel 3 to open the transverse channel 3. Second embodiment, in the embodiment shown in the figures, said means for controlling the unidirectional flow of gas comprise a one-way valve 5; and an air inlet of the one-way valve 5 corresponds to the tunnel main hole 1, and an air outlet of the one-way valve corresponds to the tunnel flat guide 2. Piston wind can enter from the air inlet of the one-way valve 5 and is discharged from the air outlet, so that one-way flow is realized.
When the one-way valves 5 fail to flow backwards, gas can enter the tunnel main tunnel 1, and in order to solve the technical problem, preferably, the two one-way valves 5 are respectively installed at two ends of the transverse channel 3; a one-way air channel 4 is formed between the two one-way valves 5. When one of the one-way valves 5 fails to flow backwards, the other one-way valve 5 continues to work to prevent gas from entering the tunnel main tunnel 1, and safety is guaranteed.
When the inner diameter of the cross passage 3 is larger, preferably, the cross passage further comprises a blocking piece 6, and the blocking piece 6 blocks a gap between the outer wall of the one-way valve 5 and the inner wall of the cross passage 3. Thereby ensuring that the piston wind only passes through the non return valve 5. Embodiment one, the blanking member 6 comprises a first blanking panel and a second blanking panel; the first plugging plate is arranged between the outer wall of one check valve 5 and the inner wall of the transverse channel 3, and the second plugging plate is arranged between the outer wall of the other check valve 5 and the inner wall of the transverse channel 3. In the second embodiment, the distance between the two check valves 5 is equal to the length of the plugging piece 6, one end of the plugging piece 6 is arranged between the outer wall of one check valve 5 and the inner wall of the transverse channel 3, and the other end of the plugging piece 6 is arranged between the outer wall of the other check valve 5 and the inner wall of the transverse channel 3. At this time, the blocking piece 6 is disposed in the lateral passage 3 in a space other than the unidirectional wind passage 4.
The block piece 6 may be a steel plate, in the embodiment shown in the figure said block piece 6 is a concrete article.
The utility model discloses an above do the embodiment of the utility model can be seen from the implementation, the utility model provides a system of inside gas is led to simple effectual discharge tie of gas emission utilizes the piston wind that the train got into the tunnel positive hole and forms to lead the gas escape in with the tunnel tie, prevents effectively that gas from gathering. The tunnel has the advantages of cleanness, environmental protection, cost saving and stable gas emission times while ensuring the operation safety of the tunnel.
Claims (5)
1. A system for discharging gas in a horizontal guide comprises a tunnel main hole (1), a tunnel horizontal guide (2) and a transverse channel (3); the tunnel flat guide (2) is arranged on one side of the tunnel main hole (1) in the length direction; one end of the transverse channel (3) is communicated with the tunnel main hole (1), and the other end of the transverse channel is communicated with the tunnel flat guide (2); two ends of the tunnel flat guide (2) are respectively provided with a plugging wall (7); the method is characterized in that: an included angle alpha between the length direction of the transverse channel (3) and the advancing direction L of the train is an obtuse angle or a right angle;
a device for controlling the unidirectional flow of gas is arranged in the transverse channel (3), and the gas is ensured to flow from the tunnel main hole (1) to the tunnel flat guide (2);
and a ventilation opening is formed above the blocking wall (7).
2. A system for discharging flat pilot internal gas as defined in claim 1, wherein: the device for controlling the one-way flow of gas comprises a one-way valve (5);
and an air inlet of the one-way valve (5) corresponds to the tunnel main hole (1), and an air outlet of the one-way valve corresponds to the tunnel flat guide (2).
3. A system for discharging flat pilot internal gas as defined in claim 2, wherein: the two check valves (5) are respectively arranged at two ends of the transverse channel (3); a one-way air channel (4) is formed between the two one-way valves (5).
4. A system for discharging flat pilot internal gas as defined in claim 2, wherein: the device is characterized by further comprising a blocking piece (6), wherein the blocking piece (6) blocks a gap between the outer wall of the one-way valve (5) and the inner wall of the transverse channel (3).
5. A system for discharging flat pilot internal gas as defined in claim 4 wherein: the plugging piece (6) is a concrete product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020436488.3U CN211950572U (en) | 2020-03-30 | 2020-03-30 | System for discharging gas in flat guide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020436488.3U CN211950572U (en) | 2020-03-30 | 2020-03-30 | System for discharging gas in flat guide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211950572U true CN211950572U (en) | 2020-11-17 |
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ID=73168012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020436488.3U Active CN211950572U (en) | 2020-03-30 | 2020-03-30 | System for discharging gas in flat guide |
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| CN (1) | CN211950572U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111305893A (en) * | 2020-03-30 | 2020-06-19 | 中国十九冶集团有限公司 | System and method for discharging gas in horizontal guide pipe |
-
2020
- 2020-03-30 CN CN202020436488.3U patent/CN211950572U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111305893A (en) * | 2020-03-30 | 2020-06-19 | 中国十九冶集团有限公司 | System and method for discharging gas in horizontal guide pipe |
| CN111305893B (en) * | 2020-03-30 | 2024-07-26 | 中国十九冶集团有限公司 | System and method for discharging gas in flat guide |
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