Tunnel ventilator and tunnel ventilation system

Abstract

The utility model provides a tunnel ventilator and a tunnel ventilation system, and relates to the technical field of tunnel ventilation. The tunnel ventilator comprises a ventilation pipe, a partition piece and a centrifugal fan. An air inlet is formed in the side wall of the ventilation pipe, and an air outlet is formed in the end of the ventilation pipe. The partition piece is arranged in the ventilation pipe and located between the air inlet and the air outlet, and an airflow channel is formed between the partition piece and the pipe wall of the ventilation pipe; the centrifugal fan is located on the side face of the ventilation pipe and comprises a volute, and the exhaust end of the volute is arranged at the air inlet. The centrifugal fan feeds air into the ventilation pipe, and the air flows through the airflow channel. And the flowing speed of air in the airflow channel is higher, the flowing distance is longer after the air leaves the air outlet, and the ventilation effect is better. In addition, the air pressure of the centrifugal fan is far higher than that of the axial flow fan, the generated airflow is stronger and not prone to being interfered by surrounding air, the flowing distance of the air leaving the air outlet is increased, and the ventilation effect is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel ventilation technical field especially relates to a tunnel ventilator and tunnel ventilation system. BACKGROUND

[0002] Tunnel ventilation refers to the air exchange method for creating the required air environment for the tunnel, and its purpose is to speed up the air exchange inside and outside the tunnel hole and improve the air quality inside the hole.

[0003] The existing tunnel ventilation system usually uses an axial flow fan, and the airflow is easily disturbed by the surrounding air after leaving the air outlet of the ventilation pipe, quickly dissipates, and has a short flow distance, so the ventilation effect is poor. SUMMARY

[0004] In order to solve the problems in the prior art, one of the purposes of the utility model is to provide a tunnel ventilator.

[0005] The utility model provides the following technical scheme:

[0006] A tunnel ventilator comprises:

[0007] A ventilation pipe is provided with an air inlet on the side wall, and the end of the ventilation pipe along the axis direction is provided with an air outlet;

[0008] A partition is arranged in the ventilation pipe and located between the air inlet and the air outlet, the partition extends along the axis direction of the ventilation pipe, an airflow channel is formed between the partition and the pipe wall of the ventilation pipe, one end of the airflow channel is communicated with the air inlet, and the other end is communicated with the air outlet; and

[0009] A centrifugal fan is located on the side of the ventilation pipe, the centrifugal fan comprises a volute, and the exhaust end of the volute is arranged at the air inlet.

[0010] As a further optional scheme of the tunnel ventilator, the tunnel ventilator further comprises a flow guide piece arranged in the airflow channel, and the flow guide piece is used to guide the airflow to flow spirally in the airflow channel.

[0011] As a further optional scheme of the tunnel ventilator, the flow guide piece is a flow guide plate, the flow guide plate extends spirally around the axis of the ventilation pipe, one side of the flow guide plate is connected with the partition, and the other side is connected with the pipe wall of the ventilation pipe.

[0012] As a further optional solution to the tunnel ventilator, the flow guide is a flow guide protrusion, the flow guide protrusion is arranged on the partition and / or the ventilation pipe, the flow guide protrusion extends spirally around the axis of the ventilation pipe, the flow guide protrusion has a head portion close to the air inlet and a tail portion close to the air outlet, the head portion is arranged in an arc shape, and the width and / or thickness of the flow guide protrusion gradually decreases from the head portion to the tail portion.

[0013] As a further optional solution to the tunnel ventilator, the partition is provided with an inner cavity, and one end of the partition close to the air inlet is closed, and one end of the partition close to the air outlet is arranged in an open manner;

[0014] The tunnel ventilator further comprises a supplementary air pipe, the supplementary air pipe is arranged in the ventilation pipe, one end of the supplementary air pipe is in communication with the outside of the ventilation pipe, and the other end is in communication with the inner cavity.

[0015] As a further optional solution to the tunnel ventilator, the supplementary air pipe extends along the radial direction of the ventilation pipe, and a plurality of supplementary air pipes are arranged uniformly along the circumferential direction of the ventilation pipe.

[0016] As a further optional solution to the tunnel ventilator, the partition comprises a flow distribution portion, a supplementary air portion and a partition portion, the flow distribution portion, the supplementary air portion and the partition portion are connected in sequence along the axial direction of the ventilation pipe, and the flow distribution portion is close to the air inlet;

[0017] One end of the flow distribution portion away from the supplementary air portion is arranged in an arc shape, the diameter of the supplementary air portion gradually increases from one end close to the flow distribution portion to one end close to the partition portion, the partition portion is arranged in a cylindrical shape, and the partition portion and the pipe wall of the ventilation pipe form the airflow channel.

[0018] As a further optional solution to the tunnel ventilator, the tunnel ventilator further comprises a housing, the housing is connected with the side surface of the ventilation pipe, the housing is provided with an air suction cavity and an air exhaust cavity inside, the air exhaust cavity is arranged at the air inlet and is in communication with the air inlet;

[0019] The centrifugal fan is arranged in the air suction cavity, and the exhaust end of the volute is connected to the cavity wall of the air exhaust cavity and is in communication with the air exhaust cavity.

[0020] As a further optional solution to the tunnel ventilator, the ventilation pipe is provided with the air outlet at both ends along the axial direction of the ventilation pipe, the partition is arranged correspondingly to the air outlet, and the partition is located between the air inlet and the corresponding air outlet;

[0021] The air inlet is provided with a rotating shaft and a baffle, the axis of the rotating shaft is perpendicular to the axis of the ventilation pipe, and the baffle is rotationally connected with the ventilation pipe through the rotating shaft.

[0022] Another object of the present application is to provide a tunnel ventilation system.

[0023] The present application provides the following technical solutions:

[0024] A tunnel ventilation system comprises the tunnel ventilator.

[0025] The embodiment of the present application has the following beneficial effects:

[0026] The tunnel ventilator is matched with the ventilation pipe by using the centrifugal fan, air is discharged from the exhaust end of the volute into the air inlet by the centrifugal fan, so that the air is sent into the ventilation pipe. The air flows from the air inlet to the air outlet in the ventilation pipe, and flows through the airflow channel between the partition and the pipe wall of the ventilation pipe in the process. Since the flow cross section of the airflow channel is smaller than other areas of the ventilation pipe, the flow rate of the air in the airflow channel is faster, the flow distance after leaving the air outlet is longer, and the ventilation effect is better. In addition, the air pressure of the centrifugal fan is much higher than that of the axial flow fan, the airflow generated is more powerful, is not easily disturbed by the surrounding air, and also helps to increase the flow distance of the air after leaving the air outlet and enhance the ventilation effect.

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0029] Figure 1 Fig. 1 shows the overall structure of a tunnel ventilator according to an embodiment of the present application;

[0030] Figure 2 Fig. 2 shows the internal structure of a tunnel ventilator according to an embodiment of the present application;

[0031] Figure 3 Fig. 3 shows the structure of a ventilation pipe in a tunnel ventilator according to an embodiment of the present application.

[0032] Explanation of main element symbols:

[0033] 100 - ventilation pipe; 110 - air inlet; 111 - rotating shaft; 112 - baffle; 120 - air outlet; 200 - partition; 210 - inner cavity; 220 - flow dividing part; 230 - air supplementing part; 240 - partition part; 300 - centrifugal fan; 310 - volute; 400 - air flow channel; 500 - shell; 510 - air suction cavity; 520 - air exhaust cavity; 600 - flow guide; 700 - air supplementing pipe. DETAILED DESCRIPTION

[0034] Embodiments of the present application are described in detail below with reference to the accompanying drawings, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as limiting the present application.

[0035] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical", "horizontal", "left", "right", and the like as used herein are used for explanation purposes only.

[0036] In the present application, unless otherwise clearly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In addition, the terms "first", "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the templates herein is used only for the purpose of describing particular embodiments and is not intended to be limiting of the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0039] Embodiments

[0040] Please refer to Figure 1 and Figure 2 The embodiment provides a tunnel ventilator, which comprises a ventilation pipe 100, a partition 200 and a centrifugal fan 300.

[0041] The side wall of the ventilation pipe 100 is provided with an air inlet 110 (see Figure 3 The end of the ventilation pipe 100 along the axial direction is provided with an air outlet 120.

[0042] The partition 200 is arranged in the ventilation pipe 100 and located between the air inlet 110 and the air outlet 120. The partition 200 extends along the axial direction of the ventilation pipe 100, and an airflow channel 400 is formed between the partition 200 and the pipe wall of the ventilation pipe 100. One end of the airflow channel 400 is in communication with the air inlet 110, and the other end is in communication with the air outlet 120.

[0043] The centrifugal fan 300 is located on the side of the ventilation pipe 100, and the centrifugal fan 300 comprises a volute 310, and the exhaust end of the volute 310 is arranged in the air inlet 110.

[0044] The tunnel ventilator adopts the centrifugal fan 300 cooperating with the ventilation pipe 100, and air is discharged from the exhaust end of the volute 310 into the air inlet 110 by the centrifugal fan 300, so that the air is sent into the ventilation pipe 100. The air flows from the air inlet 110 to the air outlet 120 in the ventilation pipe 100, and flows through the airflow channel 400 between the partition 200 and the pipe wall of the ventilation pipe 100 in the process. Since the flow cross section of the airflow channel 400 is smaller than that of other areas of the ventilation pipe 100, the flow rate of the air in the airflow channel 400 is faster, the flow distance after leaving the air outlet 120 is longer, and the ventilation effect is better. In addition, the air pressure of the centrifugal fan 300 is much higher than that of the axial flow fan, and the airflow generated is more powerful and is not easily disturbed by the surrounding air, which is also conducive to increasing the flow distance of the air after leaving the air outlet 120 and enhancing the ventilation effect.

[0045] Please refer to Figure 1 and Figure 2In some embodiments, the tunnel ventilator further comprises a housing 500. The housing 500 is connected to the side of the ventilation pipe 100, and the housing 500 is internally provided with an air suction cavity 510 and an air exhaust cavity 520. The air exhaust cavity 520 is arranged at the air inlet 110 and is in communication with the air inlet 110. At the same time, the air suction cavity 510 is in communication with the outside of the housing 500.

[0046] Correspondingly, the centrifugal fan 300 is arranged in the air suction cavity 510. The air exhaust end of the volute 310 is connected to the cavity wall of the air exhaust cavity 520 and is in communication with the air exhaust cavity 520.

[0047] When the centrifugal fan 300 is running, the air suction end of the volute 310 continuously sucks the air in the air suction cavity 510 and exhausts the air from the air exhaust end of the volute 310 into the air exhaust cavity 520, thereby exhausting the air into the air inlet 110. In this process, the air outside the housing 500 is continuously supplemented into the air suction cavity 510.

[0048] In some embodiments, the ventilation pipe 100 is provided with an air outlet 120 at both ends along the axial direction of the ventilation pipe 100. The partition 200 is arranged corresponding to the air outlet 120, and the partition 200 is located between the air inlet 110 and the corresponding air outlet 120.

[0049] In addition, the air inlet 110 is provided with a rotating shaft 111 and a baffle 112. The axis of the rotating shaft 111 is perpendicular to the axis of the ventilation pipe 100, and the baffle 112 is rotatably connected to the ventilation pipe 100 through the rotating shaft 111.

[0050] In use, the baffle 112 is rotated by the rotating shaft 111 to block one side of the air inlet 110 facing one of the air outlets 120, so that the air exhausted from the air inlet 110 flows to the other air outlet 120 in the ventilation pipe 100, thereby adjusting the flow direction of the air. Therefore, the tunnel ventilator can adjust the ventilation direction as needed.

[0051] It can be understood that a servo motor can be installed outside the ventilation pipe 100 to drive the rotating shaft 111 to rotate.

[0052] In other embodiments, the ventilation pipe 100 can also be provided with an air outlet 120 at only one end, and the other end remains closed.

[0053] Please refer to Figure 3 In some embodiments, the tunnel ventilator further comprises a flow guide 600. The flow guide 600 is arranged in the airflow channel 400, and the flow guide 600 is used to guide the airflow to flow spirally in the airflow channel 400.

[0054] When the air flows through the air flow channel 400 between the partition 200 and the pipe wall of the ventilation pipe 100, the air flows spirally under the guidance of the flow guide 600, is less interfered by the surrounding air, and flows a longer distance after leaving the air outlet 120, thus achieving better ventilation effect.

[0055] In the embodiment, the flow guide 600 is a flow guide plate. The flow guide plate extends spirally around the axis of the ventilation pipe 100, one side of the flow guide plate is connected with the partition 200, and the other side is connected with the pipe wall of the ventilation pipe 100.

[0056] Specifically, a plurality of flow guide plates are arranged, and the plurality of flow guide plates are distributed along the circumference of the ventilation pipe 100, so as to divide the air flow channel 400 into a plurality of spiral channels.

[0057] The air entering the ventilation pipe 100 through the air inlet 110 enters each spiral channel respectively and flows along the spiral channel to the air outlet 120. Finally, the air leaves the air outlet 120 and continues to flow spirally forward.

[0058] In another embodiment of the application, the flow guide 600 can also be a flow guide protrusion. The flow guide protrusion is arranged on the partition 200 and / or the ventilation pipe 100, that is, the flow guide protrusion can be arranged on the partition 200, can be arranged on the ventilation pipe 100, or can be arranged on the partition 200 and the ventilation pipe 100 respectively.

[0059] In addition, the flow guide protrusion extends spirally around the axis of the ventilation pipe 100. The flow guide protrusion has a head portion close to the air inlet 110 and a tail portion close to the air outlet 120, the head portion is arranged in an arc shape, and the width and / or thickness of the flow guide protrusion gradually decreases from the head portion to the tail portion.

[0060] Understandably, the flow guide protrusion is also arranged in a plurality of flow guide protrusions, and the plurality of flow guide protrusions are distributed along the circumference of the ventilation pipe 100.

[0061] When the air flows in the air flow channel 400, the part of the air directly contacting the flow guide protrusion flows spirally along the surface of the flow guide protrusion, and in turn drives the remaining part of the air to flow spirally. At the same time, the entire flow guide protrusion is in the shape of a water droplet, which can reduce the wind resistance and ensure the smooth flow of the air in the air flow channel 400.

[0062] Please refer to Figure 2 and Figure 3 , further, the inventor of the application finds that the air flow velocity is large and the pressure is low at the air outlet 120 of the ventilation pipe 100, especially a significant negative pressure is formed in the surrounding area of the air flow channel 400, which hinders the air flow to flow forward.

[0063] To solve the problem, in some embodiments, the partition 200 is provided with an inner cavity 210, and an end of the partition 200 close to the air inlet 110 is closed, and an end of the partition 200 close to the air outlet 120 is open.

[0064] Correspondingly, the tunnel ventilator further comprises a gas supplement pipe 700. The gas supplement pipe 700 is arranged in the ventilation pipe 100, one end of the gas supplement pipe 700 communicates with the outside of the ventilation pipe 100, and the other end communicates with the inner cavity 210.

[0065] In use, the open end of the partition 200 is located in the inner periphery of the airflow channel 400 and forms a negative pressure. At this time, the air outside the ventilation pipe 100 can be sucked into the inner cavity 210 of the partition 200 through the gas supplement pipe 700, and then supplemented to the open end of the partition 200, so as to weaken the negative pressure in the inner periphery of the airflow channel 400, reduce the obstruction to the airflow flowing out of the airflow channel 400, and at the same time, the airflow flowing out of the airflow channel 400 can be supplemented to increase the airflow. Therefore, the airflow can flow more smoothly after leaving the air outlet 120 of the ventilation pipe 100, and the ventilation effect is better.

[0066] Specifically, the gas supplement pipe 700 extends along the radial direction of the ventilation pipe 100. The gas supplement pipe 700 is provided in plurality, and the plurality of gas supplement pipes 700 are uniformly arranged along the circumference of the ventilation pipe 100.

[0067] Understandably, the plurality of gas supplement pipes 700 uniformly arranged along the circumference of the ventilation pipe 100 can uniformly and timely supplement the inner cavity 210 of the partition 200.

[0068] In some embodiments, the partition 200 comprises a flow dividing part 220, a gas supplement part 230 and a partition part 240. The flow dividing part 220, the gas supplement part 230 and the partition part 240 are connected in sequence along the axis direction of the ventilation pipe 100, and the flow dividing part 220 is close to the air inlet 110.

[0069] Among them, the end of the flow dividing part 220 away from the gas supplement part 230 is arc-shaped. The diameter of the gas supplement part 230 gradually increases from the end close to the flow dividing part 220 to the end close to the partition part 240.

[0070] When the air entering the ventilation pipe 100 from the air inlet 110 flows to the air outlet 120, it first contacts the flow dividing part 220 and is divided by the flow dividing part 220. Then, the air is dispersed along the outer surface of the gas supplement part 230 and flows into the entire airflow channel 400. In this process, the arc-shaped end of the flow dividing part 220 can reduce air resistance, and the gradually increasing diameter of the gas supplement part 230 can make the air flow more smoothly.

[0071] In addition, the partition part 240 is provided in a cylindrical shape, and the airflow channel 400 is formed between the partition part 240 and the pipe wall of the ventilation pipe 100.

[0072] It can be understood that the axis of the partition 240 coincides with the axis of the ventilation pipe 100, and the airflow passage 400 formed has a uniform width, which is conducive to the stable flow of air in the airflow passage 400.

[0073] In summary, the above-mentioned tunnel ventilator adopts a centrifugal fan 300 cooperating with the ventilation pipe 100, and air is sent into the ventilation pipe 100 by the centrifugal fan 300 from the exhaust end of the volute 310 to the air inlet 110. The air flows from the air inlet 110 to the air outlet 120 in the ventilation pipe 100, and in the process, flows through the airflow passage 400 between the partition 200 and the pipe wall of the ventilation pipe 100. Since the flow cross section of the airflow passage 400 is smaller than other areas of the ventilation pipe 100, the flow rate of the air in the airflow passage 400 is faster, and the flow distance after leaving the air outlet 120 is longer, and the ventilation effect is better. In addition, the air pressure of the centrifugal fan 300 is much higher than that of the axial flow fan, and the airflow generated is more powerful and less susceptible to interference from the surrounding air, which is also conducive to increasing the flow distance of the air after leaving the air outlet 120 and enhancing the ventilation effect.

[0074] The embodiment also provides a tunnel ventilation system, comprising the above-mentioned tunnel ventilator.

[0075] In all examples shown and described herein, any specific values should be interpreted as merely exemplary and not as a limitation, and thus other examples of the example embodiments can have different values.

[0076] It should be noted that similar reference numbers and letters represent similar items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0077] The above-mentioned embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. A tunnel ventilator, characterized in that The tunnel ventilator comprises: a ventilation pipe, a side wall of the ventilation pipe being provided with an air inlet, and an end of the ventilation pipe in the direction of its axis being provided with an air outlet; a partition arranged in the ventilation pipe and located between the air inlet and the air outlet, the partition extending in the direction of the axis of the ventilation pipe, and a gas flow channel being formed between the partition and the pipe wall of the ventilation pipe, one end of the gas flow channel being communicated with the air inlet and the other end being communicated with the air outlet; and a centrifugal fan located at the side of the ventilation pipe, the centrifugal fan comprising a volute, and an exhaust end of the volute being arranged at the air inlet. The tunnel ventilator further comprises a flow guide arranged in the gas flow channel, the flow guide being used to guide the gas flow to flow spirally in the gas flow channel.

2. The tunnel ventilator of claim 1, wherein, The flow guide is a flow guide plate, the flow guide plate extending spirally around the axis of the ventilation pipe, one side of the flow guide plate being connected with the partition and the other side being connected with the pipe wall of the ventilation pipe.

3. The tunnel ventilator of claim 2, wherein, The flow guide is a flow guide protrusion, the flow guide protrusion being arranged on the partition and / or the ventilation pipe, the flow guide protrusion extending spirally around the axis of the ventilation pipe, the flow guide protrusion having a head portion close to the air inlet and a tail portion close to the air outlet, the head portion being arranged in an arc shape, and the width and / or thickness of the flow guide protrusion gradually decreasing from the head portion to the tail portion.

4. The tunnel ventilator of claim 2, wherein, The partition is provided with an inner cavity, and one end of the partition close to the air inlet is closed, and one end of the partition close to the air outlet is arranged in an open manner; 5. The tunnel ventilator according to any one of claims 1-4, characterized in that, The tunnel ventilator further comprises a gas supplement pipe, the gas supplement pipe being arranged in the ventilation pipe, one end of the gas supplement pipe being communicated with the outside of the ventilation pipe, and the other end being communicated with the inner cavity. The gas supplement pipe extends in the radial direction of the ventilation pipe, and a plurality of gas supplement pipes are arranged uniformly in the circumferential direction of the ventilation pipe.

6. The tunnel ventilator of claim 5, wherein, The partition comprises a flow distribution portion, a gas supplement portion and a partition portion, the flow distribution portion, the gas supplement portion and the partition portion being connected in sequence in the direction of the axis of the ventilation pipe, and the flow distribution portion being close to the air inlet; 7. The tunnel ventilator of claim 5 wherein, one end of the flow distribution portion away from the gas supplement portion is arranged in an arc shape, the diameter of the gas supplement portion gradually increases from one end close to the flow distribution portion to one end close to the partition portion, the partition portion is arranged in a cylindrical shape, and the partition portion and the pipe wall of the ventilation pipe form the gas flow channel. The tunnel ventilator further comprises a shell connected with the side of the ventilation pipe, the shell being provided with an air suction cavity and an air exhaust cavity in the shell, the air exhaust cavity being arranged at the air inlet and communicated with the air inlet; 8. The tunnel ventilator according to any one of claims 1-4, wherein, the centrifugal fan is arranged in the air suction cavity, and the exhaust end of the volute is connected with the cavity wall of the air exhaust cavity and communicated with the air exhaust cavity. Both ends of the ventilation pipe in the direction of its axis are provided with the air outlet, the partition is arranged correspondingly to the air outlet, and the partition is located between the air inlet and the corresponding air outlet.

9. The tunnel ventilator according to any one of claims 1-4, wherein, ​ The air inlet is provided with a rotating shaft and a baffle, the axis of the rotating shaft is perpendicular to the axis of the ventilation pipe, and the baffle is rotationally connected with the ventilation pipe through the rotating shaft.

10. A tunnel ventilation system characterized in that, The tunnel ventilator comprises the tunnel ventilator according to any one of claims 1-9.

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