Tunnel multi-fork concentrated air bellow device

Abstract

The utility model discloses a tunnel multi-fork concentrated air bellow device which comprises an air inlet bellow and an air outlet bellow, an inlet of the air inlet bellow is connected with an air inlet fan through a main air inlet pipe, and an outlet of the air inlet bellow is connected with a multi-channel air inlet pipe. An inlet of the air outlet box is connected with a multi-channel air outlet pipe through an air outlet fan, and an outlet of the air outlet box is connected with a main air outlet pipe; the bottom of the air inlet box is connected with the top of the air outlet box through a backflow box, and a reversing turning plate assembly is arranged in the backflow box. According to the utility model, high-efficiency air supply and air circulation can be carried out in the branch tunnel under normal conditions, and the air path can be changed under the condition of abnormal air supply quantity so as to enable the air which is originally conveyed to the outside of the tunnel to flow back into the tunnel, so that the air content in the tunnel is ensured emergently.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel ventilation and relates to a tunnel multi-fork concentrated air box device. Background Art

[0002] During the tunnel construction process, drilling and blasting methods are often used to excavate the tunnel face. During the excavation of the face, shiny dust will be generated, which will affect the air environment in the tunnel, endanger the health of the workers, and affect the construction safety and work efficiency. At the same time, when the excavation depth of the tunnel gradually deepens and is accompanied by the excavation of branch tunnels, the traditional tunnel air supply device cannot meet the needs of air replenishment and air circulation inside the branch tunnel. In addition, due to the blockage of the air inlet pipeline and the lack of air inside the air inlet pipeline when the fan is started, the air inlet pipeline shrinks. At this time, the existing tunnel fan cannot timely input sufficient air into each branch tunnel, which causes the problem of hypoxia inside the branch tunnel, affecting the life safety of the workers in the tunnel.

[0003] Therefore, in view of the defects that the existing tunnel air supply device cannot efficiently supply and circulate air to the branch tunnel and cannot guarantee the air intake inside the branch tunnel when the air intake volume is abnormal, the utility model discloses a tunnel multi-fork concentrated air box device. Utility Model Content

[0004] The purpose of the utility model is to provide a tunnel multi-fork centralized air box device, which can provide efficient air supply and air circulation to the inside of the branch tunnel under normal circumstances, and can change the wind path to return the air originally delivered to the outside of the tunnel to the inside of the tunnel under abnormal air intake conditions, so as to ensure the air content in the tunnel in an emergency.

[0005] The utility model is realized by the following technical solutions:

[0006] A tunnel multi-fork centralized wind box device comprises an air inlet box and an air outlet box, wherein the inlet of the air inlet box is connected to an air inlet fan via a main air inlet duct, and the outlet of the air inlet box is connected to a multi-channel air inlet duct; the inlet of the air outlet box is connected to a multi-channel air outlet duct via an air outlet fan, and the outlet of the air outlet box is connected to the main air outlet duct; the bottom of the air inlet box is connected to the top of the air outlet box via a return box, and a reversing flap assembly is arranged inside the return box.

[0007] When the air intake is normal, the reversing flap assembly inside the return box between the air inlet box and the air outlet box is in a state of blocking the air duct inside the return box. At this time, the air inlet box and the air outlet box supply air independently of each other. The clean air outside the tunnel is transported to the air inlet box through the main air inlet duct by the air inlet fan for concentration, and then the clean air is transported to the inside of the tunnel through the multi-channel air inlet duct through the air inlet box. And for branch tunnels, multi-channel air inlet ducts corresponding to the number of channels can be set according to the number of branch tunnels, so as to realize the delivery of clean air to the inside of each branch tunnel.

[0008] The exhaust fan generates suction force to suck the dirty air mixed with dust inside the tunnel into the multi-channel exhaust pipe. For branch tunnels, multi-channel exhaust pipes with the corresponding number of channels can be set according to the number of branch tunnels, so as to realize the suction and delivery of the turbid air inside each branch tunnel to the inside of the exhaust box for concentration, and discharge the turbid air to the outside of the tunnel through the main exhaust pipe. The air inside the multi-branch tunnel is circulated and renewed through the cooperation of the air inlet box and the exhaust box, ensuring that the workers inside the tunnel are in a relatively safe and clean air environment.

[0009] When the air intake volume drops below the safety threshold, it indicates that the air intake volume cannot meet the safety work requirements inside the tunnel. At this time, the reversing flap assembly is reversed to open the air duct inside the return box and close the outlet of the air outlet box. At this time, the turbid air sucked by the outlet fan cannot be discharged to the outside of the tunnel through the outlet of the air outlet box and the main air outlet pipe, but flows along the air duct inside the return box to the air intake box, and under the action of the air intake fan, the turbid air is returned to the tunnel for emergency. It should be noted that when insufficient air intake may lead to insufficient air leakage in the tunnel, the first thing to solve is the safety of the workers in the tunnel, so the turbid air is returned to the tunnel for air replenishment in an emergency. When the air intake volume returns to normal, the reversing flap assembly closes the air duct inside the return box again and opens the outlet of the air outlet box, thereby restoring the normal state in which the air intake box inputs clean air alone and the air outlet box outputs turbid air alone.

[0010] In order to better realize the utility model, further, the reversing flap assembly includes a flap motor and a reversing flap, the reversing flap is rotatably hinged inside the reflux box through a rotating shaft, and one end of the rotating shaft is connected to the output shaft of the flap motor.

[0011] In order to better realize the utility model, further, a one-way membrane flap is arranged between the bottom of the return box and the air inlet box.

[0012] In order to better realize the utility model, further, the multi-channel air inlet pipe includes an air inlet rigid pipe, a switching flange, and a multi-channel air inlet hose. The inlet end of the air inlet rigid pipe is connected to the outlet of the air inlet box, and the outlet end of the air inlet rigid pipe is connected to the inlet end of the multi-channel air inlet hose through the switching flange. The outlet end of the multi-channel air inlet hose is provided with a plurality of diversion pipelines.

[0013] In order to better realize the present utility model, further, the multi-channel air outlet duct includes an air outlet rigid pipe, a switching flange, and a multi-channel air inlet hose. The inlet end of the air outlet rigid pipe is connected to the outlet end of the multi-channel air inlet hose, and the inlet end of the multi-channel air inlet hose is provided with a plurality of branch pipelines; the outlet end of the air outlet rigid pipe is connected to the inlet end of the air outlet fan through the switching flange, and the outlet end of the air outlet fan is connected to the inlet of the air outlet box.

[0014] In order to better implement the utility model, further, an air inlet flow sensor is provided in the air inlet box, and an air outlet flow sensor is provided in the air outlet box.

[0015] In order to better implement the utility model, further, a detachable box cover is provided on one side of the air inlet box, and a dust removal grille is provided inside the air inlet box.

[0016] In order to better implement the utility model, further, a detachable box cover is provided on one side of the air outlet box, and a dust removal grille is provided inside the air outlet box.

[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0018] When the air intake volume is normal, the utility model blocks the air duct inside the return box between the air inlet box and the air outlet box through the reversing flap assembly, so that the air inlet box cooperates with the air inlet fan and the multi-channel air inlet duct to independently input clean air into the branch tunnel, and at the same time, the air outlet box cooperates with the air outlet fan and the multi-channel air outlet duct to extract the turbid air inside the branch tunnel, thereby realizing efficient air replenishment and air circulation for the branch tunnel; when the air intake volume is reduced, the air duct inside the return box between the air inlet box and the air outlet box is opened through the reversing flap assembly and the outlet of the air outlet box is closed at the same time, so that the turbid air that should have been discharged to the outside of the tunnel is returned to the air inlet box through the air duct inside the return box, and is re-delivered to the inside of the branch tunnel along with the clean air, thereby realizing emergency replenishment of the air inside the branch tunnel and avoiding the occurrence of hypoxia inside the branch tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the centralized wind box device at multiple forks in the tunnel;

[0020] Figure 2This is a cross-sectional view of the internal structure of the centralized bellows device at multiple forks in the tunnel;

[0021] Figure 3 A schematic diagram of closing the air duct inside the reflux box;

[0022] Figure 4 This is a schematic diagram of the opening of the air duct inside the reflux box;

[0023] Figure 5 It is a structural schematic diagram of the reversing flap assembly.

[0024] Among them: 1-air inlet box; 2-air outlet box; 3-main air inlet duct; 4-air inlet fan; 5-multi-channel air inlet duct; 6-air outlet fan; 7-multi-channel air outlet duct; 8-main air outlet duct; 9-return box; 10-reversing flap assembly; 100-dust removal grille; 101-flip motor; 102-reversing flap; 103-one-way membrane flap. DETAILED DESCRIPTION

[0025] The following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the utility model explicitly states otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0028] Terminology explanation section: The terms "install", "connect", "connect", "fixed" and so on in the present utility model should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0029] Embodiment 1:

[0030] A tunnel multi-fork centralized wind box device of this embodiment, such as Figure 1 and Figure 2 As shown, it includes an air inlet box 1 and an air outlet box 2, the inlet of the air inlet box 1 is connected to the air inlet fan 4 through the main air inlet pipe 3, and the outlet of the air inlet box 1 is connected to the multi-channel air inlet pipe 5; the inlet of the air outlet box 2 is connected to the multi-channel air outlet pipe 7 through the air outlet fan 6, and the outlet of the air outlet box 2 is connected to the main air outlet pipe 8; the bottom of the air inlet box 1 is connected to the top of the air outlet box 2 through a return box 9, and a reversing flap assembly 10 is arranged inside the return box 9.

[0031] The air inlet box 1, the air outlet box 2, and the return box 9 are all made of stainless steel materials. The end of the air inlet box 1 close to the tunnel entrance is the inlet end, and the end of the air inlet box 1 close to the inside of the tunnel is the outlet end. A connecting flange is provided at the end of the air inlet box 1 close to the tunnel entrance, and the inlet of the air inlet box 1 is connected to the outlet end of the main air inlet pipe 3 through the connecting flange. The inlet end of the main air inlet pipe 3 is connected to the outlet end of the air inlet fan 4 through a quick-plug interface. A quick-plug interface is provided at the end of the air inlet box 1 close to the inside of the tunnel, and the inlet end of the multi-channel air inlet pipe 5 is directly detachably plugged into the quick-plug interface. The outlet end of the multi-channel air inlet pipe 5 is provided with a corresponding number and length of air ducts according to the number of branches inside the tunnel and the depth of the branch tunnel.

[0032] The end of the air outlet box 2 close to the tunnel entrance is the outlet end, and the end of the air outlet box 2 close to the tunnel is the inlet end. The end of the air outlet box 2 close to the tunnel entrance is provided with a connecting flange, and the outlet of the air outlet box 2 is conveniently connected to the main air outlet pipe 8 through the connecting flange. The end of the air outlet box 2 close to the tunnel is provided with a quick-plug interface, and the outlet end of the air outlet fan 6 is conveniently connected to the quick-plug interface directly through the pipeline, and the inlet end of the air outlet fan 6 is connected to the outlet end of the multi-channel air outlet pipe 7 through the connecting flange. The inlet end of the multi-channel air outlet pipe 7 is provided with a corresponding number and length of air ducts according to the number of branches inside the tunnel and the depth of the branch tunnel.

[0033] The bottom of the air inlet box 1 and the top of the air outlet box 2 are both provided with corresponding connection ports, and the connection ports on the upper and lower sides are connected through the return box 9. The return box 9 is provided with an air duct for connecting the air inlet box 1 and the air outlet 2, and a reversing flap assembly 10 is also rotatably hingedly provided in the air duct. When the reversing flap assembly 10 is rotated to the first position, the air duct inside the return box 9 is blocked, and the air inlet box 1 and the air outlet box 2 are separated from each other; when the reversing flap assembly 10 is rotated to the second position, the air duct inside the return box 9 is opened and the outlet of the air outlet box 2 is blocked at the same time, and the air inlet box 1 and the air outlet box 2 are connected to the air duct inside the return box 9.

[0034] When the air intake of the air inlet box 1 can normally meet the air intake range required for safe work of the workers in the tunnel, the reversing flap assembly 10 rotates to the first position, the air inlet box 1 is not connected to the air outlet box 2, and the clean air outside the tunnel is input and collected into the air inlet box 1 through the air inlet fan 4, and input into each branch tunnel through the multi-channel air inlet pipe 5. The turbid air inside each branch tunnel is transported and collected to the air outlet box 2 through the air outlet fan 6 and the multi-channel air outlet pipe 7, and then the turbid air is discharged to the outside of the tunnel through the main air outlet pipe 8, thereby realizing the circulation of air inside and outside the tunnel.

[0035] When the air intake of the air inlet box 1 is abnormal and cannot meet the air intake range required for the safe work of the workers in the tunnel, the reversing flap assembly 10 rotates to the second position, the air inlet box 1 is connected to the air outlet box 2 through the return box 9, and the outlet of the air outlet box 2 is closed at the same time. At this time, the clean air outside the tunnel is input and collected into the air inlet box 1 through the air inlet fan 4, and is input into the interior of each branch tunnel through the multi-channel air inlet pipe 5. At the same time, the turbid air inside each branch tunnel is transported and collected to the air outlet box 2 through the air outlet fan 6 in conjunction with the multi-channel air outlet pipe 7, and then the turbid air is returned to the air inlet box 1 through the air duct inside the return box 9, so that the turbid air is mixed with the clean air and then re-transported to the interior of the tunnel to replenish the air inside the tunnel in an emergency to ensure the safety of the workers.

[0036] When the air intake of the air inlet box 1 returns to normal, the reversing flap assembly 10 flips back from the second position to the first position, so that the air inlet box 1 and the air outlet box 2 resume independent air intake and air outlet states.

[0037] Embodiment 2:

[0038] A tunnel multi-fork centralized wind box device of this embodiment is improved on the basis of embodiment 1, such as Figure 2 and Figure 5 As shown, the reversing flap assembly 10 includes a flap motor 101 and a reversing flap 102 . The reversing flap 102 is rotatably hinged inside the return box 9 via a rotating shaft, and one end of the rotating shaft is connected to the output shaft of the flap motor 101 .

[0039] A driven gear is mounted on the outside of one end of the rotating shaft, and a driving gear is mounted on the output shaft of the flap motor 101, and the driving gear is meshed with the driven gear. The flap motor 101 drives the driving gear to rotate, thereby driving the rotating shaft of the external driven gear to rotate, and finally driving the reversing flap 102 to flip and move between the first position and the second position.

[0040] Furthermore, a one-way membrane flap 103 is provided between the bottom of the return box 9 and the air inlet box 1. The one-way membrane flap 103 is made of latex material. When the airflow flows in the direction from the air outlet box 2 to the air inlet box 1, the one-way membrane flap 103 is forced to open to open the air duct inside the return box 9. When the airflow flows in the direction from the air inlet 1 to the air outlet box 2, the one-way membrane flap 103 is forced to close to close the air duct inside the return box 9. The one-way membrane flap 103 is provided to ensure that when the air duct inside the return box 9 is opened, the air can only flow from the air outlet box 2 to the air inlet box 1 to avoid air backflow.

[0041] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.

[0042] Embodiment 3:

[0043] A tunnel multi-fork centralized wind box device of this embodiment is improved on the basis of embodiment 1 or 2, such as Figure 1 As shown, the multi-channel air inlet pipe 5 includes an air inlet rigid pipe, a switching flange, and a multi-channel air inlet hose. The inlet end of the air inlet rigid pipe is connected to the outlet of the air inlet box 1, and the outlet end of the air inlet rigid pipe is connected to the inlet end of the multi-channel air inlet hose through the switching flange. The outlet end of the multi-channel air inlet hose is provided with a plurality of diversion pipelines.

[0044] The air inlet rigid pipe is made of stainless steel or aluminum alloy, the inlet end of the air inlet rigid pipe is plugged with the outlet of the air inlet box 1 or connected through a connecting flange, and the outlet end of the air inlet rigid pipe is connected to the inlet end of the multi-channel air inlet hose through a transfer flange, and the multi-channel air inlet hose is made of plastic material. According to the number of branch tunnels and the depth of each branch tunnel, corresponding number and length of diversion pipelines are set, and air is transported to the face of each branch tunnel through the diversion pipeline.

[0045] The other parts of this embodiment are the same as those of Embodiment 1 or 2, and thus will not be described in detail.

[0046] Embodiment 4:

[0047] A tunnel multi-fork centralized wind box device of this embodiment is improved on the basis of any one of embodiments 1-3, such as Figure 1 As shown, the multi-channel air outlet duct 7 includes an air outlet rigid pipe, a switching flange, and a multi-channel air inlet hose. The inlet end of the air outlet rigid pipe is connected to the outlet end of the multi-channel air inlet hose, and the inlet end of the multi-channel air inlet hose is provided with a plurality of branch pipes; the outlet end of the air outlet rigid pipe is connected to the inlet end of the air outlet fan 6 through the switching flange, and the outlet end of the air outlet fan 6 is connected to the inlet of the air outlet box 2.

[0048] The air outlet rigid pipe is made of stainless steel or aluminum alloy, the inlet end of the air outlet rigid pipe is connected to the outlet end of the multi-channel air inlet hose by plugging or connecting flange, the outlet end of the air outlet rigid pipe is connected to the inlet end of the air outlet fan 6 by a transfer flange, and the multi-channel air outlet hose is made of plastic material. According to the number of branch tunnels and the depth of each branch tunnel, corresponding number and length of diversion pipelines are set, and the turbid air at the face of each branch tunnel is sucked out through the diversion pipeline.

[0049] The other parts of this embodiment are the same as any one of Embodiments 1-4, so they are not described again.

[0050] Embodiment 5:

[0051] A tunnel multi-fork centralized wind box device of this embodiment is improved on the basis of any one of embodiments 1-4, wherein the air inlet box 1 is provided with an air inlet flow sensor, and the air outlet box 2 is provided with an air outlet flow sensor. The air inlet flow rate inside the air inlet box 1 is detected in real time by the air inlet flow sensor, and the air outlet flow rate inside the air outlet box 2 is detected in real time by the air outlet flow sensor. By real-time monitoring of the air inlet flow rate and the air outlet flow rate, a safety assessment of the air volume and circulation conditions inside the tunnel can be performed. At the same time, the air inlet flow rate can be used to determine in real time whether the air inlet volume of the air inlet box 1 is in an abnormal state, and then the air duct inside the return box 9 is opened in time according to the air inlet flow rate.

[0052] The other parts of this embodiment are the same as any one of Embodiments 1-4, so they are not described again.

[0053] Embodiment 6:

[0054] A tunnel multi-fork centralized wind box device of this embodiment is improved on the basis of any one of embodiments 1-5, such as Figure 2 As shown, a detachable box cover is provided on one side of the air inlet box 1, and a dust removal grille 100 is provided inside the air inlet box 1. A detachable box cover is provided on one side of the air outlet box 2, and a dust removal grille 100 is provided inside the air outlet box 2.

[0055] By arranging dust removal grilles 100 inside the air inlet box 1 and the air outlet box 2, the dust suspended in the air can be filtered through the dust removal grilles 100, further improving the air circulation quality. The dust removal grilles 100 need to be cleaned after long-term use. At this time, the box cover can be opened, and the dust removal grilles 100 can be easily disassembled and replaced.

[0056] The other parts of this embodiment are the same as any one of Embodiments 1-5, so they are not described again.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. A tunnel multi-fork centralized air box device, comprising an air inlet box (1) and an air outlet box (2), characterized in that: The inlet of the air inlet box (1) is connected to the air inlet fan (4) via the main air inlet pipe (3), and the outlet of the air inlet box (1) is connected to the multi-channel air inlet pipe (5); the inlet of the air outlet box (2) is connected to the multi-channel air outlet pipe (7) via the air outlet fan (6), and the outlet of the air outlet box (2) is connected to the main air outlet pipe (8); the bottom of the air inlet box (1) is connected to the top of the air outlet box (2) via a return box (9), and a reversing flap assembly (10) is provided inside the return box (9).

2. A tunnel multi-fork centralized wind box device according to claim 1, characterized in that: The reversing flap assembly (10) comprises a flap motor (101) and a reversing flap (102); the reversing flap (102) is rotatably hinged inside the return box (9) via a rotating shaft, and one end of the rotating shaft is drivingly connected to an output shaft of the flap motor (101).

3. The tunnel multi-fork centralized wind box device according to claim 1, characterized in that: A one-way membrane flap (103) is provided between the return box (9) and the bottom of the air inlet box (1).

4. The tunnel multi-fork centralized wind box device according to claim 1, characterized in that: The multi-channel air inlet pipe (5) comprises an air inlet rigid pipe, a transfer flange, and a multi-channel air inlet hose. The inlet end of the air inlet rigid pipe is connected to the outlet of the air inlet box (1), the outlet end of the air inlet rigid pipe is connected to the inlet end of the multi-channel air inlet hose via the transfer flange, and the outlet end of the multi-channel air inlet hose is provided with a plurality of branch pipes.

5. The tunnel multi-fork centralized wind box device according to claim 1, characterized in that: The multi-channel air outlet pipe (7) comprises an air outlet rigid pipe, a transfer flange, and a multi-channel air inlet hose; the inlet end of the air outlet rigid pipe is connected to the outlet end of the multi-channel air inlet hose, and the inlet end of the multi-channel air inlet hose is provided with a plurality of branch pipes; the outlet end of the air outlet rigid pipe is connected to the inlet end of an air outlet fan (6) via a transfer flange, and the outlet end of the air outlet fan (6) is connected to the inlet of an air outlet box (2).

6. The tunnel multi-fork centralized wind box device according to claim 1, characterized in that: The air inlet box (1) is provided with an air inlet flow sensor, and the air outlet box (2) is provided with an air outlet flow sensor.

7. The tunnel multi-fork centralized wind box device according to claim 1, characterized in that: A detachable box cover is provided on one side of the air inlet box (1), and a dust removal grille (100) is provided inside the air inlet box (1).

8. The tunnel multi-fork centralized wind box device according to claim 1, characterized in that: A detachable box cover is provided on one side of the air outlet box (2), and a dust removal grille (100) is provided inside the air outlet box (2).

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