Ventilation structure for highway tunnel inclined shaft construction

Abstract

The utility model discloses a ventilation structure for highway tunnel inclined shaft construction, which comprises a straight wind tunnel pipe and suspended ceiling frames welded on two sides of the top end of the straight wind tunnel pipe, the suspended ceiling frames are used for being connected with the top wall of a tunnel inclined shaft, and a back plate is welded at the bottom end of the straight wind tunnel pipe. The outer wall of one side of the back plate is provided with a double-claw radial air blowing channel communicated with an inner cavity of the straight wind tunnel pipe, and the outer wall of the other side of the back plate is provided with an air blowing fan used for promoting air flow in the axial direction of the straight wind tunnel pipe. The multiple sections of straight wind tunnel pipes are in continuous butt joint in the extending direction of the inclined shaft, a deep through air channel is formed, uniform distribution of airflow can be achieved in the vertical direction through the double-claw radial air blowing air channel, air is prevented from being concentrated in a certain layer or area, in this way, air can evenly flow from top to bottom, and the effect of uniform distribution of the airflow is achieved. And airflow in the top area and the bottom area of the inclined shaft is effectively promoted.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel inclined shaft ventilation technical field, concretely is a ventilation structure of highway tunnel inclined shaft construction. BACKGROUND

[0002] Tunnel inclined shaft is a structure set up in long tunnel construction to shorten the construction period. By setting up the inclined shaft, the working face can be increased to speed up the construction progress. The tunnel inclined shaft is usually cut into the middle of the tunnel, and after reaching the main tunnel, normal construction is started. The part that has not reached the main tunnel is called inclined shaft, and the ventilation structure is an important measure to ensure construction safety and construction environment quality. It can maintain air circulation, ensure sufficient oxygen supply for construction personnel, and prevent the concentration of harmful gases such as carbon dioxide from being too high. Secondly, the ventilation structure can effectively remove harmful gases (such as carbon monoxide and nitrogen oxides) and dust generated during tunnel construction, reduce pollution of the construction environment, and protect the health of workers. The design principle of the ventilation structure is based on the mechanical principle of the fan and air flow. The ventilation system generates air flow through the fan, and uses the air duct to introduce fresh air into the tunnel and exhaust the dirty air. The fan generates negative pressure or positive pressure through rotating blades to push air to flow in the air duct, and uses pressure difference to promote the circulation of air flow. The layout of the air duct needs to reduce the resistance of air flow and avoid dead angles to ensure uniform distribution of air flow. However, the current ventilation structure mainly arranges several fans on the top wall of the tunnel inclined shaft along the line, and the fan promotes air flow in the axial direction above the tunnel inclined shaft. Because the air density in the tunnel inclined shaft is large, the air with low temperature will naturally accumulate at the bottom of the inclined shaft, and the lighter warm air will concentrate in the upper part. Such air flow distribution leads to weak air flow at the bottom of the inclined shaft, and even may cause stagnation or air flow backflow, which not only makes the air quality at the bottom of the tunnel poor, but also easily accumulates harmful gases and dust. When the construction area gradually deepens or the shape of the tunnel changes, air flow circulation may become more difficult, and air flow in some areas may be deflected or form dead angles. SUMMARY

[0003] The utility model aims at providing a ventilation structure of highway tunnel inclined shaft construction, installing straight air hole pipes that are continuously butt jointed in sequence on the top wall of the tunnel inclined shaft, installing double sheep horn blast air ducts that can blow air in the vertical radial direction on the straight air hole pipes, and installing back plates at the bottom end of the straight air hole pipes. The blast fan in the back plate promotes air flow in the axial direction of the straight air hole pipe, so that there is air flow in the upper part and the lower part of the tunnel inclined shaft, to solve the problems raised in the above background technology.

[0004] To achieve the above object, the utility model provides the following technical scheme: A ventilation structure of highway tunnel inclined shaft construction, the ventilation structure comprises a straight wind tunnel pipe and a suspended ceiling frame welded on both sides of the top end of the straight wind tunnel pipe, the suspended ceiling frame is used for being connected with the top wall of the tunnel inclined shaft, the bottom end of the straight wind tunnel pipe is welded with a backboard, and a double-horn radial blast duct that is communicated with the internal chamber of the straight wind tunnel pipe is installed on the outer wall of one side of the backboard, and a blast fan for promoting air flow in the axial direction of the straight wind tunnel pipe is installed on the outer wall of the other side of the backboard.

[0005] Preferably, the straight wind tunnel pipe and the suspended ceiling frame are made of stainless steel components, and the straight wind tunnel pipe is integrally formed with flanges at both ends.

[0006] Preferably, the top end of the suspended ceiling frame is provided with a straight mouthed hollow groove.

[0007] Preferably, the double-horn radial blast duct is two symmetrical square-horn pipes fixed on the outer wall of one side of the backboard, the top end of the square-horn pipe is welded with the arc outer wall of the straight wind tunnel pipe, and the top end and the bottom end of the square-horn pipe are respectively provided with an air inlet and a square air outlet.

[0008] Preferably, the outer walls on both sides of the straight wind tunnel pipe are provided with air outlet holes communicated with the air inlet, and the planar shape of the air outlet hole is rectangular.

[0009] Preferably, the inside of the backboard is provided with a hollow cavity for installing the blast fan.

[0010] Compared with the prior art, the utility model has the beneficial effects that: the ventilation structure of highway tunnel inclined shaft construction is formed by the continuous butt joint of multiple straight wind tunnel pipes in the extension direction of the inclined shaft, forming a longitudinal air passage, and the double-horn radial blast duct can realize the uniform distribution of air flow in the vertical direction, avoiding the concentration of air in a certain level or area, and through this way, the air can flow uniformly from top to bottom, ensuring that the air flow at the top and bottom areas of the inclined shaft is effectively promoted, thereby preventing the accumulation of harmful gases and dust at the bottom, and through the combination of the straight wind tunnel pipe, the backboard and the blast fan, the air flow not only flows radially, but also can be effectively supplemented in the axial direction, ensuring that the air flow in the tunnel inclined shaft can cover all areas, especially the areas where air flow is easy to accumulate, such as the bottom and corners of the tunnel, avoiding the local air stagnation and non-flowing phenomenon, and greatly improving the efficiency of air flow. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a front view structure schematic diagram of the utility model;

[0012] Figure 2 It is a three-dimensional structure schematic diagram of the utility model Figure 1 ;

[0013] Figure 3 The utility model discloses a three-dimensional structure schematic diagram Figure 2 ;

[0014] Figure 4 The utility model discloses a three-dimensional structure schematic diagram Figure 3 ;

[0015] Figure 5 The utility model discloses a three-dimensional structure schematic diagram

[0016] Figure 6 The utility model discloses a three-dimensional structure schematic diagram

[0017] In the figure: 1, straight wind tunnel pipe, 2, ceiling frame, 201, straight mouth hollow groove, 3, square mouthed sheep horn pipe, 301, square exhaust port, 302, air inlet, 4, backboard, 5, hollow cavity, 6, air blower, 7, air outlet. Specific implementation

[0018] The technical scheme in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range protected by the utility model.

[0019] In Figures 1-6 , the utility model relates to a kind of ventilation structure of highway tunnel inclined shaft construction, including straight wind tunnel pipe 1 and the ceiling frame 2 welded on the top end of straight wind tunnel pipe 1 two sides, ceiling frame 2 is used to connect with the top wall of tunnel inclined shaft, when the inside arrangement axial flow fan of straight wind tunnel pipe 1, axial flow fan generates powerful air flow effect by rotating blade, provides the power source of air flow, air will be effectively discharged to the lower half of tunnel by double sheep horn radial air blast air duct at this time;

[0020] The bottom end of straight wind tunnel pipe 1 is welded with backboard 4, and double sheep horn radial air blast air duct that is interconnected with the internal chamber of straight wind tunnel pipe 1 is installed on the outer wall of one side of backboard 4, air blower 6 for promoting air flow in the axial direction of straight wind tunnel pipe 1 is installed on the outer wall of the other side of backboard 4, and hollow cavity 5 for installing air blower 6 is provided in the inside of backboard 4;

[0021] Hollow cavity 5 in backboard 4 is installed and arranged for air blower 6, and air blower 6 arranged along line makes that air flow can flow along the longitudinal direction of tunnel, prevents air flow stagnation, and ensures the sustainability of air circulation;

[0022] Straight wind tunnel pipe 1 and ceiling frame 2 are made of stainless steel component, and flange plate is integrally formed at the two ends of straight wind tunnel pipe 1;

[0023] The top end of the ceiling frame 2 is provided with a straight-mouth hollow groove 201, when the straight wind tunnel pipe 1 is installed, the straight-mouth hollow groove 201 in the ceiling frame 2 is used for the wall nail to pass out, so that the wall nail is used for fixing the straight wind tunnel pipe 1 and the ceiling frame 2, so as to bear the straight wind tunnel pipe 1, the double-horn radial air blowing air duct, the back plate 4 and the air blowing fan 6 and the like ventilation equipment;

[0024] The double-horn radial air blowing air duct is two symmetrical square-mouth horn pipes 3 fixed on the outer wall of one side of the back plate 4, the top end of the square-mouth horn pipe 3 is welded with the arc surface outer wall of the straight wind tunnel pipe 1, the top end and the bottom end of the square-mouth horn pipe 3 are respectively provided with an air inlet 302 and a square air outlet 301, the outer wall of both sides of the straight wind tunnel pipe 1 is provided with an air outlet hole 7 in communication with the air inlet 302, and the planar shape of the air outlet hole 7 is rectangular.

[0025] The air in the straight wind tunnel pipe 1 will enter the square-mouth horn pipe 3 through the air outlet hole 7 and the air inlet 302 in turn, and blow downward through the square air outlet 301, so that the air is uniformly distributed to different levels of the tunnel, avoiding the uneven airflow phenomenon in the traditional ventilation design.

[0026] In use, the worker first firmly fixes the plurality of straight wind tunnel pipes 1 to the top wall of the highway tunnel inclined shaft by using the ceiling frame 2, and flange connects the first end and the tail end of the adjacent two straight wind tunnel pipes 1, so that the plurality of straight wind tunnel pipes 1 are parallel to the extension direction of the tunnel inclined shaft, the worker can install the axial flow fan in one or more straight wind tunnel pipes 1, the straight wind tunnel pipe 1 provides a through channel for air flow, and the air blowing effect of the axial flow fan forms a stable airflow path for the longitudinal depth of the whole tunnel, in the process, the wind power generated by the axial flow fan blows through the double-horn radial air blowing air duct to the lower half of the inclined shaft, so that the airflow is uniformly distributed in the vertical direction at the square-mouth horn pipe 3, so that the air can penetrate into the lower half and the bottom area of the tunnel, and the airflow balance of the inclined shaft bottom and the upper part is promoted, so that the air flow of the whole tunnel is more smooth and uniform, in the process, the worker synchronously opens the air blowing fan 6, the air blowing fan 6 pushes the air from the bottom end of the straight wind tunnel pipe by mechanical force, promotes the airflow to flow in the axial direction, i.e. the longitudinal direction of the tunnel, and the line arrangement of the plurality of air blowing fans 6 can generate sufficient air pressure to promote the air flow, so as to ensure that the air can flow rapidly from one end of the inclined shaft to the other end, so as to form a continuous airflow circulation.

[0027] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A ventilation structure for the construction of inclined shafts in highway tunnels, characterized in that: It includes a straight wind tunnel pipe (1) and a ceiling frame (2) welded to both sides of the top of the straight wind tunnel pipe (1). The ceiling frame (2) is used to connect with the top wall of the tunnel inclined shaft. A back plate (4) is welded to the bottom of the straight wind tunnel pipe (1). A double ram's horn radial blower air duct that communicates with the internal cavity of the straight wind tunnel pipe (1) is installed on the outer wall of one side of the back plate (4). A blower fan (6) for promoting airflow in the axial direction of the straight wind tunnel pipe (1) is installed on the outer wall of the other side of the back plate (4).

2. The ventilation structure for construction of a highway tunnel inclined shaft according to claim 1, characterized in that: The straight wind tunnel pipe (1) and the ceiling frame (2) are both made of stainless steel components, and both ends of the straight wind tunnel pipe (1) are integrally formed with flanges.

3. The ventilation structure for construction of a highway tunnel inclined shaft according to claim 1, characterized in that: The top of the ceiling frame (2) is provided with a straight hollow groove (201).

4. The ventilation structure for construction of a highway tunnel inclined shaft according to claim 1, characterized in that: The double ram's horn radial blower duct consists of two symmetrical square ram's horn tubes (3) fixed on the outer wall of one side of the back plate (4). The top of the square ram's horn tube (3) is welded to the outer wall of the arc surface of the straight wind tunnel tube (1). The top and bottom of the square ram's horn tube (3) are respectively provided with an air inlet (302) and a square air outlet (301).

5. The ventilation structure for construction of a highway tunnel inclined shaft according to claim 4, characterized in that: The straight wind tunnel pipe (1) has air outlets (7) on both outer walls that are connected to the air inlet (302), and the air outlets (7) are rectangular in shape.

6. The ventilation structure for construction of a highway tunnel inclined shaft according to claim 1, characterized in that: The back plate (4) has a hollow cavity (5) for the installation of the blower fan (6).

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