Ventilation device for rail transit

Abstract

The utility model relates to the technical field of rail ventilation, and discloses a ventilation device for rail transit, which comprises a ventilation box, a fixing plate is fixedly connected to the front side of the inside of the ventilation box, and bolts are in threaded connection to four corners of the front side of the ventilation box. The rear sides of the multiple bolts all penetrate through the front side of the ventilation box and are in threaded connection with the front side of a fixing plate, an air inlet is formed in the front side of the fixing plate, a draught fan is fixedly connected into the air inlet, an air outlet is formed in the rear side of the interior of the ventilation box, and a hinge is fixedly connected to the top end of the rear side of the interior of the ventilation box. In the utility model, during normal ventilation, airflow inflows to push the valve open, so that the air flows smoothly, the ventilation is stopped or the airflow flows reversely, the inlet pressure is reduced, the gravity shut-off valve is automatically closed by virtue of the hinge under the action of self gravity, the air backflow is prevented, and the one-way ventilation function is realized, so that various weather conditions can be met, and the one-way ventilation device can be suitable for various vehicle types.

Description

Technical Field

[0001] This utility model relates to the field of rail ventilation technology, and in particular to a ventilation device for rail transit. Background Technology

[0002] Ventilation systems for rail transit are essential equipment for ensuring a comfortable and safe air environment inside rail transit vehicles. They provide passengers and staff with sufficient fresh air to meet their respiratory needs, ensure that the oxygen content inside the vehicle is within the normal range, and at the same time expel stale air, carbon dioxide, odors, etc., maintaining good air quality.

[0003] Ventilation systems are designed for a single vehicle model or climate condition. When faced with different vehicle models and climate conditions, the structure needs to be redesigned to suit the current vehicle model and climate conditions. Existing technology uses adjustable devices with variable frequency fans to adjust the ventilation volume in real time according to actual ventilation needs. It monitors parameters such as carbon dioxide concentration, temperature and humidity inside the vehicle through sensors and automatically controls the fan speed to achieve optimized control of ventilation volume and meet the ventilation requirements under different climate conditions. It can also flexibly adapt to different vehicle models with different space sizes and passenger capacities. However, in actual use, the structure is complex, and the device lacks a valve to prevent gas backflow, making it unable to achieve unidirectional ventilation function. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a ventilation device for rail transit, which aims to improve the problems of existing technology where the structure is complex, there is no valve inside the device to prevent gas backflow, and it cannot achieve unidirectional ventilation function.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a ventilation device for rail transit, comprising a ventilation box, a fixed plate fixedly connected to the front side of the ventilation box, bolts threadedly connected to the four corners of the front side of the ventilation box, the rear sides of the bolts penetrating the front side of the ventilation box and threadedly connected to the front side of the fixed plate, an air inlet opened on the front side of the fixed plate, a fan fixedly connected inside the air inlet, an air outlet opened on the rear side of the ventilation box, a hinge fixedly connected to the top of the rear side of the ventilation box, a gravity shut-off valve fixedly connected to the front bottom of the hinge, an air outlet pipe connected to the rear side of the ventilation box, and a filter mechanism provided inside the air outlet pipe for filtering.

[0006] As a further description of the above technical solution:

[0007] The filtration mechanism includes a filter screen, the outer wall of which is fixedly connected to the inside of the air outlet pipe. A groove is provided on the top of the outer wall of the air outlet pipe. A connecting plate is fixedly connected to the top of the outer wall of the filter screen. A slot is provided on the front side of the connecting plate. A locking block is fixedly connected inside the slot. Screws are threaded to the four corners of the top of the locking block.

[0008] As a further description of the above technical solution:

[0009] Two mounting bases are fixedly connected to the top of each of the left and right sides of the ventilation box, and threaded holes are opened on the top of each of the mounting bases.

[0010] As a further description of the above technical solution:

[0011] Mounting plates are fixedly connected to both the left and right sides of the ventilation box, and reflective stickers are fixedly connected to the opposite sides of the two mounting plates.

[0012] As a further description of the above technical solution:

[0013] The ventilation box has an insertion hole on the right front end, and multiple inserts are fixedly connected to the left side of the insertion hole.

[0014] As a further description of the above technical solution:

[0015] Two sealing tubes are fixedly connected to the rear side of the fixing plate, and both sealing tubes adopt a smooth design.

[0016] As a further description of the above technical solution:

[0017] A lamp holder is fixedly connected to the top of the left inner side of the ventilation box, and a lighting lamp is fixedly connected to the left side of the lamp holder.

[0018] As a further description of the above technical solution:

[0019] The diameter of the air outlet pipe matches the diameter of the air outlet, and the diameter of the connecting plate is smaller than the diameter of the groove.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, during normal ventilation, the airflow pushes open the valve, allowing the air to circulate smoothly. Once ventilation stops or the airflow reverses, the inlet pressure decreases, and the gravity shut-off valve automatically closes under its own weight with the help of a hinge to prevent air backflow. The gravity shut-off valve realizes the one-way ventilation function, thus meeting various climatic conditions and adapting to various vehicle models.

[0022] 2. In this utility model, when installing the filter screen, align the connecting plate with the groove and insert it. Align the clip fixed in the groove of the connecting plate with the corresponding position of the air outlet pipe and insert it. Use screws to tighten the clips at the four corners of the top of the clips in a threaded connection manner. The clips will then be firmly fixed on the air outlet pipe. The filter screen is installed inside the air outlet pipe, thereby realizing the quick installation and removal of the filter screen for cleaning. Attached Figure Description

[0023] Figure 1 This is a perspective view of a ventilation device for rail transit proposed in this utility model;

[0024] Figure 2 This is a front view of a ventilation device for rail transit proposed in this utility model;

[0025] Figure 3 This is a right view of a ventilation device for rail transit proposed in this utility model;

[0026] Figure 4 This is an exploded view of the hinge of a ventilation device for rail transit proposed in this utility model;

[0027] Figure 5 This is a split view of the filter screen of a ventilation device for rail transit proposed in this utility model.

[0028] Legend:

[0029] 1. Ventilation box; 2. Filter mechanism; 201. Groove; 202. Filter screen; 203. Connecting plate; 204. Slot; 205. Locking block; 206. Screw; 3. Fixing plate; 4. Bolt; 5. Air inlet; 6. Fan; 7. Air outlet; 8. Hinge; 9. Gravity shut-off valve; 10. Air outlet pipe; 11. Mounting base; 12. Threaded hole; 13. Mounting plate; 14. Reflective sticker; 15. Insertion hole; 16. Insert plate; 17. Sealing tube; 18. Lamp holder; 19. Lighting lamp. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0031] Reference Figure 1 , Figure 2 and Figure 4This utility model provides an embodiment of a ventilation device for rail transit, comprising a ventilation box 1. A fixing plate 3 is fixedly connected to the front side of the ventilation box 1 to provide an installation position. Bolts 4 are threadedly connected to the four corners of the front side of the ventilation box 1. The rear sides of multiple bolts 4 penetrate the front side of the ventilation box 1 and are threadedly connected to the front side of the fixing plate 3. The fixing plate 3 is fixed to the inside of the ventilation box 1 by the bolts 4. An air inlet 5 is provided on the front side of the fixing plate 3. A fan 6 is fixedly connected inside the air inlet 5. When the fan 6 is started, air is drawn into the ventilation box 1 through the air inlet 5. An air outlet 7 is provided on the rear side of the inside of the ventilation box 1 for air... The ventilation box 1 has a hinge 8 fixedly connected to the top rear side of the interior. A gravity shut-off valve 9 is fixedly connected to the bottom front side of the hinge 8. When the airflow enters from the normal direction, the gravity shut-off valve 9 is pushed open under the action of airflow pressure, allowing the gas to pass through. When the ventilation stops or the airflow reverses, the gravity shut-off valve 9 automatically closes under its own gravity through the hinge 8 due to the decrease or disappearance of the inlet side pressure, thereby preventing the airflow from flowing in reverse and preventing the backflow of air, odors and dust. The rear side of the ventilation box 1 is connected to an air outlet pipe 10 for the air to flow out. The air outlet pipe 10 is equipped with a filter mechanism 2 for filtration.

[0032] Specifically, a fixing plate 3 is fixedly connected to the front of the ventilation box 1. The fixing plate 3 provides a stable position for subsequent equipment installation. Bolts 4 are installed at the four corners of the front of the ventilation box 1 using threaded connections. The rear of the bolts 4 passes through the front of the ventilation box 1 and is threadedly connected to the front of the fixing plate 3, thus fixing the fixing plate 3 inside the ventilation box 1. An air inlet 5 is opened on the front of the fixing plate 3. A fan 6 is tightly fixedly connected inside the air inlet 5. When the fan 6 is started, the strong suction force draws outside air into the ventilation box 1 quickly through the air inlet 5. An air outlet 7 is opened on the rear of the interior of the ventilation box 1, through which the treated air flows out. A hinge 8 is fixedly connected to the top, and a gravity shut-off valve 9 is connected to the bottom front of the hinge 8. Under normal circumstances, the airflow enters from a specific direction, and the gravity shut-off valve 9 is pushed open smoothly under the action of airflow pressure, allowing air to pass through unimpeded. Once the ventilation device stops operating, or the airflow reverses, the gravity shut-off valve 9 will automatically close under its own gravity with the help of the hinge 8 due to the rapid decrease or even disappearance of the inlet side pressure. This can effectively prevent the airflow from flowing backward, thereby preventing air backflow, odors, and dust from entering with the backflowing air, ensuring the stable operation of the ventilation device. The rear side of the ventilation box 1 is connected to an exhaust pipe 10, through which air flows out, completing the entire ventilation process.

[0033] Reference Figure 5The filter mechanism 2 includes a filter screen 202. The outer wall of the filter screen 202 is fixedly connected to the inside of the air outlet pipe 10 for filtering dust in the air. A groove 201 is provided on the top of the outer wall of the air outlet pipe 10. A connecting plate 203 is fixedly connected to the top of the outer wall of the filter screen 202 for easy removal of the filter screen 202. A slot 204 is provided on the front side of the connecting plate 203. A locking block 205 is fixedly connected inside the slot 204. The locking block 205 is inserted into the slot 204. Screws 206 are threadedly connected to the four corners of the top of the locking block 205. The locking block 205 is fixed to the air outlet pipe 10 by the screws 206.

[0034] Specifically, inside the air outlet pipe 10 of the ventilation device, the outer wall of the filter screen 202 is firmly fixed therein to filter dust in the air and ensure that the outflowing air is clean. A groove 201 is specially opened at the top of the outer wall of the air outlet pipe 10. A connecting plate 203 is connected to the top of the outer wall of the filter screen 202 to facilitate the removal and maintenance of the filter screen 202 in the future. A slot 204 is provided on the front side of the connecting plate 203. The locking block 205 is fixed inside the slot 204. During installation, the locking block 205 is inserted into the slot 204. Then, screws 206 are screwed into the four corners at the top of the locking block 205 through threaded connection to firmly fix the locking block 205 on the air outlet pipe 10, so as to achieve a stable installation of the filter screen 202.

[0035] Reference Figure 1 and Figure 3 Two mounting bases 11 are fixedly connected to the top of the left and right sides of the ventilation box 1. The top of the multiple mounting bases 11 is provided with threaded holes 12 for easy installation on objects. Mounting plates 13 are fixedly connected to the left and right sides of the ventilation box 1. Reflective stickers 14 are fixedly connected to the opposite sides of the two mounting plates 13 to make it easy to see the position of the ventilation box 1. An insertion hole 15 is provided at the front right side of the ventilation box 1. Multiple inserts 16 are fixedly connected to the left side of the inside of the insertion hole 15 to charge the fan 6 when the fan 6 is out of power.

[0036] Specifically, two mounting bases 11 are fixedly connected to the top of each of the left and right sides of the ventilation box 1. Each mounting base 11 has a threaded hole 12 on its top. With the help of these threaded holes 12, the ventilation box 1 can be easily installed on various objects. Mounting plates 13 are also provided on the left and right sides of the ventilation box 1. Reflective stickers 14 are affixed to the side of the two mounting plates 13 that are far apart. In low-light environments, the reflective stickers 14 can effectively reflect light, allowing people to quickly know the position of the ventilation box 1. An insertion hole 15 is opened at the front right side of the ventilation box 1. Multiple inserts 16 are fixed inside the insertion hole 15 on the left side. When the fan 6 is low on power, it can be charged through this insertion hole 15 to ensure the continuous operation of ventilation.

[0037] Reference Figure 4 and Figure 5Two sealing tubes 17 are fixedly connected to the rear side of the fixing plate 3. Both sealing tubes 17 adopt a smooth design to increase their sealing performance. A lamp holder 18 is fixedly connected to the top of the left side of the inner side of the ventilation box 1. A lighting lamp 19 is fixedly connected to the left side of the lamp holder 18 to increase the brightness of the working area during maintenance. The diameter of the air outlet pipe 10 matches the diameter of the air outlet 7. The diameter of the connecting plate 203 is smaller than the diameter of the groove 201.

[0038] Specifically, two sealing pipes 17 are connected to the rear side of the fixing plate 3, which effectively improves the sealing of the ventilation box 1, reduces air leakage, and ensures the operation of the ventilation device. At the top left side of the ventilation box 1, the lamp holder 18 is fixed, and the lighting lamp 19 is installed on the left side of the lamp holder 18, which can greatly improve the brightness of the working area, making it easier for staff to clearly see the internal structure and accurately troubleshoot the fault. The diameter of the air outlet pipe 10 matches the air outlet 7 to ensure that the airflow is smooth and stable. The diameter of the connecting plate 203 is smaller than that of the groove 201, which facilitates the installation and removal of the filter screen 202 and provides convenience for daily maintenance work.

[0039] Working principle: After the fan 6 is started, it uses suction to quickly draw outside air into the ventilation box 1 through the air inlet 5. After the air entering the ventilation box 1 is processed, it flows out from the air outlet 7 opened on the rear side inside. Above the air outlet 7, a gravity shut-off valve 9 is connected by a hinge 8. During normal ventilation, the airflow rushes in in a specific direction and pushes open the gravity shut-off valve 9 under pressure, ensuring smooth airflow. Once the ventilation device stops operating, or the airflow reverses, the pressure on the inlet side drops sharply or even to zero. The gravity shut-off valve 9 will automatically close under its own gravity and with the help of the hinge 8, effectively blocking the reverse flow of airflow and preventing air backflow, odors and dust from mixing in with the backflowing air, thus protecting the stable operation of the ventilation device. The air flows out through the air outlet pipe 10 connected to the rear side of the ventilation box 1.

[0040] Furthermore, when installing the filter screen 202, insert the connecting plate 203 and the filter screen 202 into the groove 201, then align the locking block 205 with the corresponding position of the insertion into the air outlet pipe 10, and then tighten the screws 206 at the four corners of the top of the locking block 205 in a threaded connection manner to make the locking block 205 tightly fixed on the air outlet pipe 10, thereby achieving a stable installation of the filter screen 202 in the air outlet pipe 10 and ensuring stable operation of the filtration function.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 ventilation device for rail transit, comprising a ventilation box (1), characterized in that: A fixing plate (3) is fixedly connected to the front side of the ventilation box (1). Bolts (4) are threadedly connected to the four corners of the front side of the ventilation box (1). The rear sides of the bolts (4) penetrate the front side of the ventilation box (1) and are threadedly connected to the front side of the fixing plate (3). An air inlet (5) is opened on the front side of the fixing plate (3). A fan (6) is fixedly connected inside the air inlet (5). An air outlet (7) is opened on the rear side of the ventilation box (1). A hinge (8) is fixedly connected to the top of the rear side of the ventilation box (1). A gravity shut-off valve (9) is fixedly connected to the front side of the bottom of the hinge (8). An air outlet pipe (10) is connected to the rear side of the ventilation box (1). A filter mechanism (2) is provided inside the air outlet pipe (10). The filter mechanism (2) is used for filtration.

2. A ventilation device for rail transit according to claim 1, characterized in that: The filtering mechanism (2) includes a filter screen (202). The outer wall of the filter screen (202) is fixedly connected to the inside of the air outlet pipe (10). A groove (201) is provided on the top of the outer wall of the air outlet pipe (10). A connecting plate (203) is fixedly connected to the top of the outer wall of the filter screen (202). A slot (204) is provided on the front side of the connecting plate (203). A locking block (205) is fixedly connected inside the slot (204). Screws (206) are threadedly connected to the four corners of the top of the locking block (205).

3. A ventilation device for rail transit according to claim 1, characterized in that: The ventilation box (1) has two mounting bases (11) fixedly connected to the top of each of its left and right sides, and each of the mounting bases (11) has a threaded hole (12) on its top.

4. A ventilation device for rail transit according to claim 1, characterized in that: The ventilation box (1) is fixedly connected to the left and right sides with mounting plates (13), and reflective stickers (14) are fixedly connected to the opposite sides of the two mounting plates (13).

5. A ventilation device for rail transit according to claim 1, characterized in that: The ventilation box (1) has an insertion hole (15) at the front right side, and multiple inserts (16) are fixedly connected to the left side of the inside of the insertion hole (15).

6. A ventilation device for rail transit according to claim 1, characterized in that: The rear side of the fixing plate (3) is fixedly connected to two sealing tubes (17), both of which are designed with a smooth shape.

7. A ventilation device for rail transit according to claim 1, characterized in that: A lamp holder (18) is fixedly connected to the top of the left inner side of the ventilation box (1), and a lighting lamp (19) is fixedly connected to the left side of the lamp holder (18).

8. A ventilation device for rail transit according to claim 2, characterized in that: The diameter of the air outlet pipe (10) matches the diameter of the air outlet (7), and the diameter of the connecting plate (203) is smaller than the diameter of the groove (201).

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