A ventilation device and ventilation method for a highway gas tunnel

Abstract

The present invention discloses a ventilation device for a highway gas tunnel and a ventilation method thereof. The device comprises a first ventilation unit and a second ventilation unit, respectively arranged on either side of a construction area. The air inlet ends of the first ventilation unit and the second ventilation unit are both oriented toward the construction area, and the air outlet ends are oriented in opposite directions toward the outside of the tunnel. The first ventilation unit and the second ventilation unit each comprise a plurality of fans connected by ventilation ducts. Since the wind speed of conventional ventilation methods decreases sharply with increasing distance from the wind tube opening, the effective range of the suction method is very small. Therefore, in the present invention, multiple exhaust fans are connected so that each section of the tunnel is within the effective range, maximizing the ventilation effect and allowing gas accumulated in the construction section to be removed as quickly as possible. The device has a good smoke exhaust effect, and the return air flow does not pollute the tunnel.

Description

Technical Field

[0001] The present invention relates to the technical field of gas tunnel ventilation, and in particular to a highway gas tunnel ventilation device and a ventilation method thereof. Background Art

[0002] After the gas tunnel was completed, the connecting section could not be immediately relined due to the construction schedule. Furthermore, since both sides of the tunnel, except for the connecting section, had undergone secondary lining, gas seeped from the rock strata and flowed along the interior of the secondary lining toward the connecting section, causing gas concentrations to rise there and posing a safety hazard. Secondly, after the tunnel was completed, the natural wind volume, speed, and direction within the tunnel were erratic, sometimes causing small amounts of gas to accumulate at the construction site, making construction impossible. Thirdly, the use of forced-in ventilation after the tunnel was completed had little effect on reducing gas concentrations at the connection point. New equipment and ventilation methods must be adopted to ensure that the gas concentration within the tunnel remains below 0.5% (the normal operating value for a gas tunnel). Summary of the Invention

[0003] The purpose of the present invention is to provide a highway gas tunnel ventilation device and its ventilation effect in view of the defects and shortcomings of the existing technology, so as to ensure the ventilation effect and facilitate the layout.

[0004] To achieve the above-mentioned objectives, the present invention provides the following solution: The present invention provides a ventilation device for a highway gas tunnel, comprising a first ventilation unit and a second ventilation unit respectively arranged on both sides of a construction area, wherein the air inlet ends of the first ventilation unit and the second ventilation unit are both oriented toward the construction area, and the air outlet ends are respectively oriented in opposite directions toward the outside of the tunnel, and the first ventilation unit and the second ventilation unit both include a plurality of fans connected by ventilation pipes.

[0005] Preferably, the fan is an exhaust fan.

[0006] Preferably, the fan is fixed on a movable stand.

[0007] The present invention also provides a ventilation method using the above-mentioned highway gas tunnel ventilation device, comprising the following steps:

[0008] Arrange the first ventilation unit and the second ventilation unit composed of a plurality of fans connected on both sides of the construction area;

[0009] When the natural wind volume inside the tunnel is large enough, the gas concentration is low and no fan is started; when the wind volume inside the tunnel is extremely small, gas accumulates and the two-way fans of the first ventilation unit and the second ventilation unit are turned on at the same time; when the wind volume inside the tunnel is small and the wind blows from left to right, the fan of the first ventilation unit on the right is turned on and the fan of the second ventilation unit on the left is turned off; when the wind volume inside the tunnel is small and the wind blows from right to left, the fan of the first ventilation unit on the right is turned off and the fan of the second ventilation unit on the left is turned on.

[0010] Compared with the prior art, the present invention has achieved the following beneficial effects:

[0011] 1. Since the wind speed of ordinary ventilation method drops sharply as the distance from the wind tube mouth increases, the effective range of the suction method is very small; therefore, in the present invention, multiple exhaust fans are connected so that each section in the tunnel is within the effective range, thereby maximizing the ventilation effect and removing the gas accumulated in the construction section as soon as possible. The device has good smoke exhaust effect and the return air flow does not pollute the tunnel.

[0012] 2. Use different fan control methods according to different environments to ensure gas removal effect and save resources to the maximum extent while ensuring construction safety.

[0013] 3. Due to the uncertainty of gas accumulation, the original fixed fan stand was upgraded and converted into a movable fan stand. It can be quickly moved using a tractor as the construction progresses, eliminating the impact of gas accumulation on the construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic diagram of the overall structure of the highway gas tunnel ventilation device of the present invention;

[0016] Figure 2 Schematic diagram of the connection structure between the movable stand and the fan;

[0017] Among them, there are 1 fan; 2 ventilation ducts; 3 racks. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] The purpose of the present invention is to provide a highway gas tunnel ventilation device and its ventilation effect in view of the defects and shortcomings of the existing technology, so as to ensure the ventilation effect and facilitate the layout.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1-2 As shown, the present invention provides a ventilation device for a highway gas tunnel, comprising a first ventilation unit and a second ventilation unit, respectively arranged on either side of the construction area. The air inlets of the first and second ventilation units face the construction area, while their air outlets face opposite directions toward the outside of the tunnel. Each of the first and second ventilation units includes a plurality of exhaust fans 1, interconnected by ventilation ducts 2. The fans 1 are exhaust fans. The connection of multiple exhaust fans 1 maximizes ventilation efficiency, allowing gas accumulated in the construction area to be removed as quickly as possible. The device provides excellent smoke exhaust performance, and the return airflow does not contaminate the tunnel.

[0022] In the present invention, the fan 1 is fixed on a movable stand 3. The original fixed fan stand is upgraded and converted into a movable fan stand 3. It can be quickly moved using a tractor as the construction progresses, eliminating the impact of gas accumulation on the construction process. The stand 3 can be a track-type or roller-type structure, as long as it can achieve the mobility effect.

[0023] The present invention also provides a ventilation method using the above-mentioned highway gas tunnel ventilation device, comprising the following steps:

[0024] Arrange the first ventilation unit and the second ventilation unit composed of a plurality of fans 1 on opposite sides of the construction area;

[0025] When the natural wind volume inside the tunnel is large enough, the gas concentration is low and no fan 1 is started; when the wind volume inside the tunnel is extremely small, gas accumulates and the two-way fans 1 of the first ventilation unit and the second ventilation unit are turned on at the same time; when the wind volume inside the tunnel is small and the wind blows from left to right, the fan 1 of the first ventilation unit on the right is turned on and the fan 1 of the second ventilation unit on the left is turned off; when the wind volume inside the tunnel is small and the wind blows from right to left, the fan 1 of the first ventilation unit on the right is turned off and the fan 1 of the second ventilation unit on the left is turned on.

[0026] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A method for ventilation of a highway gas tunnel, characterized in that: The invention comprises a first ventilation unit and a second ventilation unit respectively arranged on both sides of the construction area after the tunnel is penetrated, wherein the air inlet ends of the first ventilation unit and the second ventilation unit are both oriented toward the construction area, and the air outlet ends are respectively oriented in opposite directions toward the outside of the tunnel, and the first ventilation unit and the second ventilation unit each comprise a plurality of fans connected by ventilation pipes; Arrange the first ventilation unit and the second ventilation unit composed of a plurality of fans connected on both sides of the construction area; When the natural wind volume inside the tunnel is large enough, the gas concentration is low and no fan is started; when the wind volume inside the tunnel is extremely small, gas accumulates and the two-way fans of the first ventilation unit and the second ventilation unit are turned on at the same time; when the wind volume inside the tunnel is small and the wind blows from left to right, the fan of the first ventilation unit on the right is turned on and the fan of the second ventilation unit on the left is turned off; when the wind volume inside the tunnel is small and the wind blows from right to left, the fan of the first ventilation unit on the right is turned off and the fan of the second ventilation unit on the left is turned on.

2. The highway gas tunnel ventilation method according to claim 1, characterized in that: The fan is an exhaust fan.

3. The highway gas tunnel ventilation method according to claim 1 or 2, characterized in that: The fan is fixed on a movable stand.

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