A jet fan

Abstract

This utility model discloses a jet fan, including a duct, a motor fixed inside the duct, and a fan fixed to the drive shaft end of the motor. The duct and the motor are connected by two first connectors, one near each end of the motor. Each first connector includes a first annular sleeve fitted over and fixedly connected to the motor. Multiple third connecting ribs are provided around the periphery of the first annular sleeve. Corresponding first connecting ribs are fixed to the inner wall of the duct. A rubber pad is provided between the corresponding third connecting ribs and the first connecting ribs. The third connecting ribs, the rubber pad, and the first connecting ribs are connected and fixed by bolts. This utility model, by providing rubber pads, can reduce vibration transmission from the motor to the duct, thereby reducing the risk of loosening at the connection between the fan and the tunnel.

Description

Technical Field

[0001] This utility model relates to tunnel ventilation fans, and more specifically, to a jet ventilation fan. Background Technology

[0002] Due to poor air circulation inside tunnels, jet fans are required for ventilation. These fans are often installed at the top of the tunnel. When operating, they generate significant vibrations, which poses a risk of loosening at the connection between the fan and the tunnel. Furthermore, because the fans are far from the ground and the tunnel is dimly lit, maintenance is inconvenient, and loosening of the fans may go unnoticed, posing a risk of the fans falling. Therefore, improvements are urgently needed. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a jet fan that, by setting a rubber pad, can reduce the vibration transmission from the motor to the air duct, thereby reducing the risk of loosening at the connection between the fan and the tunnel.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a jet fan, including a duct, a motor fixed inside the duct, a fan fixed to the drive shaft end of the motor, the duct and the motor connected by a first connector, the first connector having two components respectively located near both ends of the motor, the first connector including a first annular sleeve, the first annular sleeve being sleeved on the outside of the motor and fixedly connected to the motor, a plurality of third connecting ribs provided around the periphery of the first annular sleeve, a first connecting rib corresponding to the third connecting ribs fixed to the inner wall of the duct, a rubber pad provided between the corresponding third connecting ribs and the first connecting ribs, the third connecting ribs, the rubber pads and the first connecting ribs being fixedly connected by bolts.

[0005] Furthermore, a second connecting member is sleeved on the outside of the motor. The second connecting member is located between the two first connecting members. The second connecting member includes a second annular sleeve. There is a gap between the second annular sleeve and the side wall of the motor. A fourth connecting rib corresponding to the first connecting rib is provided on the periphery of the second annular sleeve. The fourth connecting rib is fixedly connected to the inner wall of the air duct.

[0006] Furthermore, the first connecting rib, the third connecting rib, and the fourth connecting rib are arranged in a straight line.

[0007] Furthermore, a rubber ring is fixed to the inner wall of the second annular sleeve, and there is a gap between the inner wall of the rubber ring and the outer wall of the motor.

[0008] Furthermore, a second connecting rib is provided at the upper part of the air duct near both ends, and a connecting plate is provided on the upper part of the second connecting rib.

[0009] Furthermore, displacement sensors are fixed at the lower part of the connecting plate near its two ends, and the upper end of the sensing head of the displacement sensor is higher than the upper surface of the connecting plate.

[0010] Furthermore, the air duct includes a first cylinder, with second cylinders at both ends of the first cylinder. The diameter of the first cylinder is smaller than the diameter of the second cylinder, and the motor is located inside the first cylinder.

[0011] Furthermore, a protective cover is fitted to the end of the second cylinder, the protective cover including annular ribs, the annular ribs being sleeved on the outside of the second cylinder and fixed to the second cylinder by screws.

[0012] Furthermore, the inner wall of the second cylinder at the end away from the first cylinder is provided with a flared opening.

[0013] In summary, this utility model has the following beneficial effects:

[0014] When installing the jet fan, the connecting plate is placed against the top of the tunnel, and the jet fan is fixed to the top of the tunnel with expansion bolts. When the motor is working, it will generate vibration. When the vibration is transmitted from the first connecting piece to the first connecting rib, the vibration at the first connecting rib will be less than the vibration at the first connecting piece after being buffered by the rubber pad. This can reduce the vibration of the air duct and reduce the risk of loosening at the connection between the jet fan and the tunnel. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0016] Figure 2 This is a cross-sectional view of this embodiment;

[0017] Figure 3 This is a partial sectional view of this embodiment;

[0018] Figure 4 This is a diagram of an intelligent monitoring system for jet fans.

[0019] Reference numerals: 1. Air duct; 11. First cylinder; 12. Second cylinder; 13. Control box; 14. Flare; 15. First connecting rib; 16. Connecting plate; 17. Second connecting rib; 2. Motor; 3. Fan; 4. Protective cover; 41. Annular rib; 5. Expansion screw; 6. First connector; 61. First annular sleeve; 62. Third connecting rib; 7. Rubber pad; 8. Bolt; 9. Second connector; 91. Fourth connecting rib; 92. Second annular sleeve; 93. Rubber ring; 100. Displacement sensor; 101. Sensing head. Detailed Implementation

[0020] 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.

[0021] like Figures 1 to 4 As shown, this embodiment discloses a jet fan, including a duct 1. A motor 2 is fixed inside the duct 1, and a fan 3 is fixed to the drive shaft end of the motor 2. The duct 1 and the motor 2 are connected by a first connector 6. There are two first connectors 6, which are respectively located near both ends of the motor 2. The first connector 6 includes a first annular sleeve 61, which is sleeved on the outside of the motor 2 and fixedly connected to the motor 2. A plurality of third connecting ribs 62 are provided around the periphery of the first annular sleeve 61. A first connecting rib 15 corresponding to the third connecting ribs 62 is fixed to the inner wall of the duct 1. A rubber pad is provided between the corresponding third connecting ribs 62 and the first connecting ribs 15. 7. The third connecting rib 62, the rubber pad 7, and the first connecting rib 15 are connected and fixed by bolts 8. The upper part of the air duct 1 is provided with a second connecting rib 17 near both ends. The upper part of the second connecting rib 17 is provided with a connecting plate 16. When installing the jet fan, the connecting plate 16 is pressed against the top of the tunnel, and the jet fan is fixed to the top of the tunnel by expansion screws 5. When the motor 2 is working, it will generate vibration. When the vibration is transmitted from the first connecting piece 6 to the first connecting rib 15, after being buffered by the rubber pad 7, the vibration at the first connecting rib 15 will be less than the vibration at the first connecting piece 6, thereby reducing the vibration of the air duct 1 and reducing the risk of loosening at the connection between the jet fan and the tunnel.

[0022] The motor 2 is fitted with a second connecting member 9 on its outer side. The second connecting member 9 is located between two first connecting members 6. The second connecting member 9 includes a second annular sleeve 92. There is a gap between the second annular sleeve 92 and the side wall of the motor 2. The second annular sleeve 92 is provided with a fourth connecting rib 91 corresponding to the first connecting rib 15 on its periphery. The fourth connecting rib 91 is fixedly connected to the inner wall of the air duct 1. A rubber ring 93 is fixed to the inner wall of the second annular sleeve 92. There is a gap between the inner wall of the rubber ring 93 and the outer wall of the motor 2. When the rubber pad 7 is used for a long time, its performance will decrease. Therefore, the vibration amplitude of the motor 2 will increase when it is working. At this time, by setting the second connecting member 9 and the rubber ring 93, the motor 2 can be limited to avoid its swing amplitude being too large and to prevent the motor 2 from detaching.

[0023] Furthermore, the first connecting rib 15, the third connecting rib 62, and the fourth connecting rib 91 are arranged in a straight line, with four of each. This design effectively reduces wind resistance.

[0024] Displacement sensors 100 are fixed at the lower part of the connecting plate 16 near its two ends. The upper end of the sensing head 101 of the displacement sensor 100 is higher than the upper surface of the connecting plate 16. The displacement sensor 100 is a position switch, also known as a proximity switch, which is existing technology. When the jet fan is installed in the tunnel, the top of the tunnel will compress the part of the sensing head 101 that is higher than the connecting plate 16. When the expansion screw 5 loosens and causes the air duct 1 to tilt, that is, when part of the connecting plate 16 separates from the top of the tunnel and the top of the tunnel separates from the sensing head 101, the displacement sensor 100 can detect the displacement of the jet fan, which makes it convenient for technicians to perform timely maintenance and prevent it from falling.

[0025] like Figure 4 The diagram shows the intelligent monitoring system for jet fans. When the displacement sensor 100 triggers a signal, it will send a feedback to the main controller and display the location where the displacement sensor 100 signal was triggered on the monitoring platform, which will facilitate timely maintenance by the operators. This system is specified in the industry standard T / CAMS140-2023.

[0026] This system utilizes a multi-objective intelligent control method and DC permanent magnet jet fan motor drive technology (allowing for direct full-speed start of the jet fan in normal fire emergency situations). It achieves the optimal matching curve between the tunnel jet fan's optimal operating efficiency and traffic operation safety conditions, considering factors such as average vehicle speed, traffic operation safety, and waste emission. This results in an "active" tunnel jet fan control method and energy-saving approach, establishing a highly efficient, low-energy-consumption, and low-waste-emission intelligent tunnel ventilation system.

[0027] like Figure 2 As shown, the air duct 1 includes a first cylinder 11, and second cylinders 12 are provided at both ends of the first cylinder 11. The diameter of the first cylinder 11 is smaller than the diameter of the second cylinder 12. The motor 2 is located inside the first cylinder 11. When the motor 2 is working, air passes through from left to right. When air enters the first cylinder 11, the air velocity increases due to the small size of the first cylinder 11, which is beneficial to the heat dissipation of the motor 2.

[0028] The end of the second cylinder 12 is covered with a protective cover 4. The protective cover 4 includes annular ribs 41. The annular ribs 41 are sleeved on the outside of the second cylinder 12 and fixed to the second cylinder 12 by screws. The inner wall of the end of the second cylinder 12 away from the first cylinder 11 is provided with a flared mouth 14. In the prior art, the protective cover 4 is generally installed inside the end of the air duct 1, which causes the edge of the protective cover 4 to affect the size of the air duct 1 inlet and outlet. However, by wrapping the protective cover 4 around the outside of the air duct 1, a flared mouth 14 can be set inside the air duct 1, which can reduce the wind resistance brought by the protective cover 4 and increase the size of the air duct 1 inlet and outlet, so as to facilitate the passage of airflow.

[0029] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A jet fan, characterized in that, The device includes a duct (1), inside which a motor (2) is fixed. A fan (3) is fixed to the drive shaft end of the motor (2). The duct (1) and the motor (2) are connected by a first connector (6). There are two first connectors (6) and they are respectively close to both ends of the motor (2). The first connector (6) includes a first annular sleeve (61). The first annular sleeve (61) is sleeved on the outside of the motor (2) and fixedly connected to the motor (2). Multiple third connecting ribs (62) are provided around the first annular sleeve (61). A first connecting rib (15) corresponding to the third connecting rib (62) is fixed on the inner wall of the duct (1). A rubber pad (7) is provided between the corresponding third connecting rib (62) and the first connecting rib (15). The third connecting rib (62), the rubber pad (7) and the first connecting rib (15) are connected and fixed by bolts (8).

2. The jet fan according to claim 1, characterized in that, The motor (2) is fitted with a second connector (9) on its outer side. The second connector (9) is located between two first connectors (6). The second connector (9) includes a second annular sleeve (92). There is a gap between the second annular sleeve (92) and the side wall of the motor (2). The second annular sleeve (92) is provided with a fourth connecting rib (91) corresponding to the first connecting rib (15) on its periphery. The fourth connecting rib (91) is fixedly connected to the inner wall of the air duct (1).

3. A jet fan according to claim 2, characterized in that, The first connecting bar (15), the third connecting bar (62) and the fourth connecting bar (91) are arranged in a straight line.

4. A jet fan according to claim 2, characterized in that, A rubber ring (93) is fixed to the inner wall of the second annular sleeve (92), and there is a gap between the inner wall of the rubber ring (93) and the outer wall of the motor (2).

5. A jet fan according to claim 1, characterized in that, The upper part of the air duct (1) is provided with a second connecting rib (17) near both ends, and a connecting plate (16) is provided on the upper part of the second connecting rib (17).

6. A jet fan according to claim 5, characterized in that, Displacement sensors (100) are fixed at the lower part of the connecting plate (16) near its two ends, and the upper end of the sensing head (101) of the displacement sensor (100) is higher than the upper surface of the connecting plate (16).

7. A jet fan according to claim 1, characterized in that, The air duct (1) includes a first cylinder (11), and a second cylinder (12) is provided at both ends of the first cylinder (11). The diameter of the first cylinder (11) is smaller than the diameter of the second cylinder (12). The motor (2) is located inside the first cylinder (11).

8. A jet fan according to claim 7, characterized in that, The end of the second cylinder (12) is covered with a protective cover (4), which includes annular ribs (41). The annular ribs (41) are sleeved on the outside of the second cylinder (12) and fixed to the second cylinder (12) by screws.

9. A jet fan according to claim 8, characterized in that, The inner wall of the second cylinder (12) away from the first cylinder (11) is provided with a flared opening (14).

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