A pressure control device for longitudinal ventilation and smoke exhaust of rail transit tunnel

Abstract

The utility model provides a kind of pressure control device for longitudinal ventilation and smoke exhaust of rail transit tunnel, comprising: horizontal diffuser duct, one end of the horizontal diffuser duct is connected with the upper side portion of flow guide duct, another end of the horizontal diffuser duct is provided with interface three for intercommunication with external two-way reversible tunnel ventilator, compared with prior art, the utility model has the following two beneficial effects: by setting horizontal diffuser duct, flow guide duct, relying on the flow guiding and pressurizing effect of flow guide duct and adjustable angle nozzle, the air flow rate of tunnel along the driving direction can be effectively improved, the air leakage in the opposite direction of tunnel is reduced, the equipment size of tunnel ventilator and the civil engineering scale are reduced while providing equal air supply for fire section; by setting horizontal diffuser duct, electric air valve one, electric air valve two, simultaneously opening electric air valve one and electric air valve two, the fan efficiency and exhaust capacity of tunnel ventilator are significantly improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of tunnel ventilation and smoke exhaust equipment, and specifically relates to a pressure control device for longitudinal ventilation and smoke exhaust in rail transit tunnels. Background Technology

[0002] Longitudinal ventilation is one of the most widely used technical solutions in the fields of ventilation and smoke control in urban rail transit, railway tunnels, and highway tunnels. It is generally achieved by tunnel fans (usually large axial flow fans) and jet fans to achieve push-pull ventilation, requiring the formation of a design cross-sectional wind speed in a certain direction within the tunnel.

[0003] In traditional longitudinal ventilation systems, the common practice is to install rectangular openings in the tunnel wall or ceiling to connect the tunnel fan to the tunnel space. This approach fails to effectively control airflow pressure and direction during supply ventilation, and the fan efficiency and air volume are limited by the opening size during exhaust ventilation. Furthermore, when the tunnel's clearance area and length are large, achieving the designed wind speed along a specific direction across the tunnel cross-section requires increasing the equipment size and the tunnel space needed for installation, thus increasing the initial investment in both equipment and civil engineering. Therefore, we aim to design a ventilation terminal device with a novel structure to address this problem. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a pressure control device for longitudinal ventilation and smoke exhaust in rail transit tunnels, so as to solve the problems mentioned in the background technology.

[0005] This utility model is achieved through the following technical solution: a pressure control device for longitudinal ventilation and smoke exhaust in rail transit tunnels, comprising: a horizontal diffuser pipe, one end of which is connected to the upper part of a guide pipe, the other end of which is provided with an interface three for connecting to an external bidirectional reversible tunnel ventilator, and the lower part of the guide pipe being connected to the upper part of an adjustable angle nozzle.

[0006] An adjustment component is installed inside the connection between the flow guide pipe and the adjustable angle nozzle. An electric air valve is installed on the lower part of the horizontal diffuser. An electric air valve is installed inside the connection between the horizontal diffuser and the flow guide pipe. In actual use, the outer wall of the horizontal diffuser can also be provided with interface 2 or interface 1. Both interface 2 and interface 3 are set separately. The three are related by OR, only with different orientations. According to the actual conditions of the project, a suitable opening position is selected and then connected to the tunnel ventilation fan. The specific settings can be set according to the actual usage requirements.

[0007] In a preferred embodiment, a male connecting flange is welded to one end of the horizontal diffuser near the flow guide pipe, and a female connecting flange is welded to one end of the flow guide pipe near the horizontal diffuser. The end of the horizontal diffuser near the flow guide pipe is sealed to the end of the flow guide pipe near the horizontal diffuser through the male connecting flange, the female connecting flange, multiple bolts, and a sealing washer.

[0008] In a preferred embodiment, the guide pipe is a variable diameter pipe, with its inner diameter gradually decreasing downwards from the upper end near the horizontal diffuser. The diameter and inner diameter of the lower part of the guide pipe are matched with the diameter and inner diameter of the upper part of the adjustable angle nozzle.

[0009] In a preferred embodiment, a male connecting flange 2 is welded to one end of the adjustable angle nozzle, and a female connecting flange 2 is welded to the end of the adjustable angle nozzle near the flow guide pipe. The end of the adjustable angle nozzle near the flow guide pipe is sealed and connected to the end of the flow guide pipe near the adjustable angle nozzle through the male connecting flange 2, the female connecting flange 2, multiple bolts, and sealing gasket 2.

[0010] In a preferred embodiment, the outer wall of the electric air valve is fixed to the inner wall of the connection between the horizontal diffuser and the guide pipe by a sealing ring and bolts. The electric air valve is placed on the outer wall of the lower end of the horizontal diffuser and is sealed to the outer wall of the lower end of the horizontal diffuser.

[0011] In a preferred embodiment, the adjustment component is installed on the inner wall of the connection between the flow guide pipe and the adjustable angle nozzle by bolts and sealing rings. The adjustment component is a bidirectional electric louver structure that adjusts the airflow direction, with an adjustment angle of 0 to 90 degrees.

[0012] After adopting the above technical solution, the beneficial effects of this utility model are: when the train is attached to the instruction manual Figure 1 When a fire occurs in the section between the device location shown and the station ahead or the tunnel entrance, and longitudinal ventilation along the direction of traffic is required, the tunnel ventilation fan and electric air valve two are turned on, while electric air valve one remains closed. Relying on the guiding and pressurizing effect of the flow diversion pipe and the adjustable angle nozzle, and utilizing the guiding and pressurizing effect of the airflow ejected from the nozzle, the airflow in the tunnel along the direction of traffic can be effectively increased, and the air leakage in the opposite direction of traffic in the tunnel on that side can be reduced. While providing an equal amount of air supply to the fire section, the size of the tunnel ventilation fan is reduced.

[0013] When this device is needed for ventilation or smoke extraction, the tunnel ventilation fan, electric air valve one, and electric air valve two are turned on. Simultaneously turning on electric air valve one and electric air valve two can increase the inlet area of ​​the tunnel ventilation fan, significantly reduce resistance, and significantly improve the fan efficiency and exhaust volume of the tunnel ventilation fan.

[0014] 2. The adjustment components and adjustable angle nozzles can be set to adjust the angle of the airflow according to actual usage needs, thereby meeting the airflow spray angle of the adjustable angle nozzles and further realizing the pressure and direction control of ventilation airflow. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of one installation method of a pressure control device for longitudinal ventilation and smoke exhaust in a rail transit tunnel according to the present invention.

[0017] Figure 2 This is a schematic diagram of the overall structure of a pressure control device for longitudinal ventilation and smoke exhaust in a rail transit tunnel according to the present invention.

[0018] In the diagram, 1-horizontal diffuser pipe, 2-flow guide pipe, 3-adjustable angle nozzle, 4-electric air valve one, 5-electric air valve two, 6-adjustment component, 7-interface one, 8-interface two, 9-interface three. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] As the first embodiment of this utility model:

[0021] Please see Figures 1 to 2 A pressure control device for longitudinal ventilation and smoke exhaust in a rail transit tunnel includes: a horizontal diffuser pipe 1, one end of which is connected to the upper part of a guide pipe 2, and the other end of which is provided with an interface 3 9 for connecting to an external bidirectional reversible tunnel ventilator; the lower part of the guide pipe 2 is connected to the upper part of an adjustable angle nozzle 3.

[0022] An adjustment component 6 is installed inside the connection between the flow guide pipe 2 and the adjustable angle nozzle 3. An electric air valve 4 is installed on the lower part of the horizontal diffuser. An electric air valve 5 is installed inside the connection between the horizontal diffuser and the flow guide pipe 2. In actual use, the outer wall of the horizontal diffuser can also be equipped with interface 8 or interface 7. Both interface 8 and interface 9 are set separately. The three are in an OR relationship, only with different orientations. According to the actual conditions of the project, a suitable opening position is selected and then connected to the tunnel ventilation fan. The specific settings can be set according to the actual usage requirements.

[0023] A male connecting flange is welded to one end of the horizontal diffuser near the guide pipe 2, and a female connecting flange is welded to one end of the guide pipe 2 near the horizontal diffuser. The end of the horizontal diffuser near the guide pipe 2 is sealed to the end of the guide pipe 2 near the horizontal diffuser through the male connecting flange, the female connecting flange, multiple bolts, and a sealing gasket.

[0024] The guide pipe 2 is a variable diameter pipe, with its inner diameter gradually decreasing downward from the upper end near the horizontal diffuser. The diameter and inner diameter of the lower part of the guide pipe 2 are matched with the diameter and inner diameter of the upper part of the adjustable angle nozzle 3.

[0025] Specifically, by setting up horizontal diffuser pipe 1, diversion pipe 2, electric air valve one 4, and electric air valve two 5, when the train is in the instruction manual appendix Figure 1 When a fire occurs in the section between the device location shown and the station or tunnel entrance ahead, and longitudinal ventilation along the direction of traffic is required, the tunnel ventilation fan 25 is turned on, and the electric air valve 4 is kept closed. Relying on the guiding and pressurizing effect of the guide pipe 2 and the adjustable angle nozzle 3, the airflow in the tunnel along the direction of traffic can be effectively increased by utilizing the guiding and pressurizing effect of the airflow ejected from the nozzle. This reduces the air leakage in the tunnel on the opposite side of traffic, providing an equal amount of air supply to the fire section while reducing the size of the tunnel ventilation fan.

[0026] When this device is needed for ventilation or smoke extraction, the tunnel ventilation fan, electric air valve 4, and electric air valve 5 are turned on. Simultaneously turning on electric air valve 4 and electric air valve 5 can increase the inlet area of ​​the tunnel ventilation fan, significantly reduce resistance, and significantly improve the fan efficiency and exhaust volume of the tunnel ventilation fan.

[0027] As a second embodiment of this utility model:

[0028] Please see Figure 2 One end of the adjustable angle nozzle 3 is welded with a male connecting flange 2, and the other end of the adjustable angle nozzle 3 near the flow guide pipe 2 is welded with a female connecting flange 2. The end of the adjustable angle nozzle 3 near the flow guide pipe 2 is sealed and connected to the end of the flow guide pipe 2 near the adjustable angle nozzle 3 through the male connecting flange 2, the female connecting flange 2, multiple bolts, and sealing gasket 2.

[0029] The outer wall of the electric air valve 25 is fixed to the inner wall of the connection between the horizontal diffuser and the guide pipe 2 by the sealing ring 1 and bolts. The electric air valve 4 is placed on the lower outer wall of the horizontal diffuser 1 and is sealed to the lower outer wall of the horizontal diffuser 1.

[0030] The adjustment component 6 is installed on the inner wall of the connection between the flow guide pipe 2 and the adjustable angle nozzle 3 by bolts and sealing rings. The adjustment component 6 is a bidirectional electric louver structure that can adjust the air direction, and its adjustment angle is 0 to 90 degrees.

[0031] Based on the first embodiment described above, further, the setting of the adjustment component 6 and the adjustable angle nozzle 3, in actual use, since the adjustment component 6 is a bidirectional electric louver structure that can adjust the angle of the airflow according to actual use needs, thereby satisfying the airflow spray angle of the adjustable angle nozzle 3, and further realizing the pressure and airflow control of ventilation airflow.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pressure control device for longitudinal ventilation and smoke exhaust in rail transit tunnels, comprising: A horizontal diffuser pipe (1) is characterized in that one end of the horizontal diffuser pipe (1) is connected to the upper part of the guide pipe (2), and the other end of the horizontal diffuser pipe is provided with an interface three (9) for connecting with an external bidirectional reversible tunnel ventilator. The lower part of the guide pipe (2) is connected to the upper part of the adjustable angle nozzle (3). An adjustment component (6) is installed inside the connection between the flow guide pipe (2) and the adjustable angle nozzle (3). An electric air valve (4) is installed on the lower part of the horizontal diffuser. An electric air valve (5) is installed inside the connection between the horizontal diffuser and the flow guide pipe (2).

2. The pressure control device for longitudinal ventilation and smoke exhaust in rail transit tunnels as described in claim 1, characterized in that: A male connecting flange is welded to one end of the horizontal diffuser near the flow guide pipe (2), and a female connecting flange is welded to one end of the flow guide pipe (2) near the horizontal diffuser. The end of the horizontal diffuser near the flow guide pipe (2) is sealed to the end of the flow guide pipe (2) near the horizontal diffuser through the male connecting flange, the female connecting flange, multiple bolts, and a sealing gasket.

3. The pressure control device for longitudinal ventilation and smoke exhaust in rail transit tunnels as described in claim 2, characterized in that: The guide pipe (2) is a variable diameter pipe, and its inner diameter gradually decreases downward from the inner end near the horizontal diffuser. The diameter and inner diameter of the lower part of the guide pipe (2) are matched with the diameter and inner diameter of the upper part of the adjustable angle nozzle (3).

4. The pressure control device for longitudinal ventilation and smoke exhaust in rail transit tunnels as described in claim 1, characterized in that: One end of the adjustable angle nozzle (3) is welded with a male connecting flange II, and the end of the adjustable angle nozzle (3) near the flow guide pipe (2) is welded with a female connecting flange II. The end of the adjustable angle nozzle (3) near the flow guide pipe (2) is sealed and connected to the end of the flow guide pipe (2) near the adjustable angle nozzle (3) through the male connecting flange II, the female connecting flange II, multiple bolts, and sealing gasket II.

5. A pressure control device for longitudinal ventilation and smoke exhaust in rail transit tunnels as described in claim 1, characterized in that: The outer wall of the electric air valve 2 (5) is fixed to the inner wall of the connection between the horizontal diffuser and the guide pipe (2) by the sealing ring 1 and bolts. The electric air valve 1 (4) is placed on the lower outer wall of the horizontal diffuser (1) and is sealed to the lower outer wall of the horizontal diffuser (1).

6. The pressure control device for longitudinal ventilation and smoke exhaust in rail transit tunnels as described in claim 1, characterized in that: The adjustment component (6) is installed on the inner wall of the connection between the flow guide pipe (2) and the adjustable angle nozzle (3) by bolts and sealing rings. The adjustment component (6) is a bidirectional electric louver structure that can adjust the air direction, and its adjustment angle is 0 to 90 degrees.

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