A type of seismic-resistant support for tunnel ventilation fans

Abstract

This utility model discloses a seismic-resistant support for a tunnel ventilation fan, relating to the field of support technology. The utility model includes a load-bearing beam, on the lower surface of which multiple support devices are fixedly installed. The lower ends of two support devices located on the same side are both fixedly connected to a bottom support beam. The upper surfaces of the two equipment mounting seats are fixedly fitted with the fan body. Each support device includes a vertical support column, longitudinal diagonal braces, and lateral diagonal braces. The top of the vertical support column is fixedly connected to the load-bearing beam. The other ends of the longitudinal and lateral diagonal braces are rotatably connected to the vertical support column via hinges. An adjusting screw is inserted inside the vertical support column, and multiple clamping devices are slidably mounted thereon. This utility model, through the coordinated use of the support devices and clamping devices, achieves improved seismic resistance, seismic stability, and installation applicability.

Description

Technical Field

[0001] This utility model relates to the field of support technology, specifically to a seismic-resistant support for tunnel ventilation fans. Background Technology

[0002] Tunnel ventilation fans are large-scale ventilation devices specifically designed for tunnel environments. They are primarily used to regulate air quality, control temperature, and remove harmful gases within the tunnel. In emergencies such as fires, they also perform smoke extraction. They are one of the core electromechanical facilities ensuring the safe operation of tunnels. Based on their installation location and function, tunnel ventilation fans can be divided into jet fans and axial fans. Tunnel ventilation fan supports are structural components used to fix and support the fans, and are crucial auxiliary equipment for ensuring stable installation and safe operation of the fans within the tunnel. Their core function is to securely connect the fans to the tunnel ceiling, sidewalls, or other designated locations, while also adapting to the special environment of the tunnel and the mechanical requirements of the fans during operation.

[0003] As the core equipment of the tunnel ventilation system, the stable operation of tunnel ventilation fans directly affects the air quality, smoke extraction efficiency, and traffic safety within the tunnel. Traditional support structures typically employ rigid connection designs, which are ill-suited to withstand multi-directional and multi-frequency vibrations. This can lead to safety hazards such as loose bolts, cracked welds, and even overall collapse. They often rely on single-directional support structures (e.g., only vertical supports or simple diagonal bracing), lacking multi-dimensional seismic design, making them prone to structural deformation or failure under complex vibration environments. For example, longitudinal seismic waves or train impacts can cause the support structure to shift along the track direction, and insufficient lateral diagonal bracing exacerbates this risk. Furthermore, the height, width, and fan specifications vary significantly between different tunnels, often requiring customized design and on-site secondary processing of existing support structures, resulting in low installation efficiency and high costs. Utility Model Content

[0004] To address the issues of seismic stability of tunnel ventilation fans under multi-directional vibration environments and insufficient adaptability to different installation scenarios, this utility model aims to provide a seismic-resistant support for tunnel ventilation fans.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a tunnel ventilation fan anti-seismic support, comprising a load-bearing beam, wherein multiple support devices are fixedly installed on the lower surface of the load-bearing beam, and the lower ends of two support devices located on the same side are jointly fixedly connected to a bottom support beam, and two equipment mounting seats are jointly fixedly installed on the upper surfaces of the two bottom support beams, and a ventilation fan body is fixedly installed on the upper surfaces of the two equipment mounting seats. The support device comprises a vertical support column, a longitudinal diagonal brace, and a lateral diagonal brace. The top end of the vertical support column is fixedly connected to the load-bearing beam, and both ends of the longitudinal diagonal brace and the lateral diagonal brace are fixedly installed with hinges. One end of the longitudinal diagonal brace and the lateral diagonal brace is rotatably connected to the load-bearing beam through the hinges, and the other end of the longitudinal diagonal brace and the lateral diagonal brace is rotatably connected to the vertical support column through the hinges. An adjusting screw is inserted inside the vertical support column and multiple clamping devices are slidably provided.

[0006] Preferably, the clamping device includes a support block, one side of which slides against the inner wall of the vertical support column, and a through threaded groove is provided in the middle of the support block. A clamping bolt is threadedly connected in the threaded groove, and a clamping plate is fixedly connected to one end of the clamping bolt. One side of the clamping plate abuts against the outer surface of the adjusting screw.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0008] This utility model achieves multi-dimensional seismic resistance in the longitudinal, lateral, and vertical dimensions through the combined use of a support device and a clamping device. It utilizes a triangular support structure, hinge rotation, and waist-shaped hole adjustment to effectively disperse impact loads and prevent structural damage. The adjusting screw can adjust the height, and the waist-shaped hole and connecting hole are adapted to different installation spacings and fan specifications, reducing construction difficulty and improving adaptability. The clamping device ensures that there is no relative sliding between the adjusting screw and the vertical support column through the locking action of the clamping bolt and the clamping plate. The combined design of the bottom connecting plate, fastening nut, and washer enhances the anti-loosening ability of the bottom connection. Attached Figure Description

[0009] 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.

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the support device structure of this utility model.

[0012] Figure 3 This utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0013] Figure 4 This is a schematic diagram of the clamping device of this utility model.

[0014] In the diagram: 11. Load-bearing beam; 12. Bottom support beam; 13. Equipment mounting base; 14. Fan clamp; 15. Fan body; 16. Support device; 17. Vertical support column; 18. Fastening device; 19. Adjusting screw; 20. Hexagonal nut; 21. Longitudinal diagonal brace; 22. Lateral diagonal brace; 23. Waist-shaped hole; 25. Hinge; 26. Bottom connecting plate; 27. Fastening nut; 28. Washer; 29. ​​Fastening bolt; 30. Support block; 31. Threaded groove; 32. Fastening plate. Detailed Implementation

[0015] 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.

[0016] Example: Figure 1-4 As shown, this utility model provides a tunnel ventilation fan anti-seismic support, including a load-bearing beam 11. Multiple support devices 16 are fixedly installed on the lower surface of the load-bearing beam 11. The support device 16 includes a vertical support column 17, a longitudinal diagonal brace 21, and a lateral diagonal brace 22. The top end of the vertical support column 17 is fixedly connected to the load-bearing beam 11. The ends of the longitudinal diagonal brace 21 and the lateral diagonal brace 22 are rotatably connected to the load-bearing beam 11 and the vertical support column 17 respectively through hinges 25. The included angle between the vertical support column 17 and the longitudinal diagonal brace 21 and the lateral diagonal brace 22 is 45 degrees, so as to form a triangular stable structure to disperse horizontal and longitudinal impact forces.

[0017] The lower ends of the two support devices 16 located on the same side are fixedly connected to the bottom support beam 12. The upper surfaces of the two bottom support beams 12 are fixedly installed with two equipment mounting seats 13. The bottom support beams 12 and the equipment mounting seats 13 are welded and fixed by continuous fillet welds. The upper surface of the equipment mounting seats 13 is fixedly installed with the fan body 15 by the arc-shaped fan clamp 14. Spring washers are provided at the bolt connection between the fan clamp 14 and the equipment mounting seat 13 to prevent the bolts from loosening. A rubber buffer layer is provided on the inner side of the fan clamp 14 to absorb the high-frequency vibration during the operation of the fan.

[0018] An adjusting screw 19 is inserted inside the vertical support column 17. The top end of the adjusting screw 19 is fixedly connected to the bearing beam 11 by an expansion bolt. The upper end is threaded with a hexagonal nut 20 and abuts against the top end of the vertical support column 17. The bottom end passes through the connection hole of the bottom support beam 12 and is fixed to the bottom connecting plate 26 on the upper and lower surfaces of the bottom support beam 12 by two fastening nuts 27. A washer 28 is provided between the fastening nut 27 and the bottom connecting plate 26 to prevent the connection from loosening due to long-term vibration.

[0019] Multiple clamping devices 18 are slidably installed inside the vertical support column 17. Each clamping device 18 includes a support block 30 that slides against the inner wall of the vertical support column 17. A through threaded groove 31 is provided in the middle of the support block 30. A clamping bolt 29 is threadedly connected inside the threaded groove 31. A clamping plate 32 is fixedly connected to one end of the clamping bolt 29. One side of the clamping plate 32 abuts against the outer surface of the adjusting screw 19 to lock the relative position of the adjusting screw 19 and the vertical support column 17.

[0020] The outer surfaces of the longitudinal diagonal brace 21 and the lateral diagonal brace 22 are provided with multiple waist-shaped holes 23. The hinge 25 is fixedly connected to the longitudinal diagonal brace 21 and the lateral diagonal brace 22 respectively by bolts passing through the waist-shaped holes 23. The hinge 25 includes two hinge plates. One end of the two hinge plates is fixedly connected by high-strength bolts, and the other end is provided with bolt holes. The bolt holes and waist-shaped holes 23 are connected to the longitudinal diagonal brace 21 by bolts, so that the diagonal brace can be finely adjusted in angle by rotation and sliding of the waist-shaped holes 23 during vibration, so as to convert rigid impact into flexible buffer.

[0021] Working principle: When the tunnel ventilation fan seismic support is working, the load-bearing beam 11 is firmly connected to the building structure by expansion bolts, becoming the core of the top support. The weight of the fan body 15 is first transferred to the equipment mounting base 13 through the fan clamp 14 with a rubber buffer layer, and then distributed to the bottom support beams 12 on both sides. The bottom support beams 12 transfer the load to the load-bearing beam 11 through the support device 16, thus constructing a complete force transmission path of "fan body 15 - fan clamp 14 - equipment mounting base 13 - bottom support beam 12 - support device 16 - load-bearing beam 11 - building structure", ensuring that the load is orderly distributed to the building body.

[0022] Within the support device 16, the vertical support column 17 bears the vertical load, while the longitudinal diagonal brace 21 and the lateral diagonal brace 22, relying on the seismic hinge 25, form a triangular stable structure with the load-bearing beam 11 and the vertical support column 17, respectively. When the tunnel experiences longitudinal vibration caused by train passage or horizontal swaying caused by an earthquake, the longitudinal diagonal brace 21 and the lateral diagonal brace 22 can rotate around the hinge 25 at a small angle, allowing the bolts to slide in conjunction with the slotted hole 23, gradually dissipating the impact force and preventing the support from deforming due to rigid impact resistance.

[0023] The adjusting screw 19 is inserted into the vertical support column 17, and the top end is locked with a hexagonal nut 20. The bottom end is connected to the bottom support beam 12 via a fastening nut 27 and a bottom connecting plate 26. During installation, the hexagonal nut 20 can be tightened to finely adjust the extension length of the vertical support column 17 to adapt to the distance between the tunnel and the fan. The clamping device 18 inside the vertical support column 17 has a support block 30 that fits against the inner wall of the column. Rotating the clamping bolt 29 causes the clamping plate 32 to press the adjusting screw 19, locking the two positions by friction. This prevents the adjusting screw 19 from sliding during an earthquake and ensures the rigidity of the support. At the connection between the bottom support beam 12 and the adjusting screw 19, a shim 28 distributes the pressure of the fastening nut 27 to prevent the nut from loosening due to long-term vibration.

[0024] When the fan body 15 is in operation or encounters external vibration, the rubber buffer layer of the fan clamp 14 first absorbs part of the high-frequency vibration. The remaining force is transmitted through the support device 16, and the longitudinal diagonal brace 21 and the lateral diagonal brace 22 are connected by hinge rotation and the waist-shaped hole 23 to convert the impact load into a continuously dispersed force, avoiding local stress concentration. Finally, all the load is transmitted to the building structure through the bearing beam 11, realizing the seismic protection of the tunnel fan and allowing the fan to be stably installed in the tunnel.

[0025] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A seismic-resistant support for a tunnel ventilation fan, comprising a load-bearing beam (11), characterized in that: Multiple support devices (16) are fixedly installed on the lower surface of the bearing beam (11). The lower ends of two support devices (16) located on the same side are fixedly connected to a bottom support beam (12). Two equipment mounting seats (13) are fixedly installed on the upper surfaces of the two bottom support beams (12). The fan body (15) is fixedly installed on the upper surfaces of the two equipment mounting seats (13). The support device (16) includes a vertical support column (17), a longitudinal diagonal brace (21), and a lateral diagonal brace (22). The top of the vertical support column (17) is fixedly connected to the load-bearing beam (11). Both ends of the longitudinal diagonal brace (21) and the lateral diagonal brace (22) are fixedly installed with hinges (25). One end of the longitudinal diagonal brace (21) and the lateral diagonal brace (22) is rotatably connected to the load-bearing beam (11) through the hinges (25). The other end of the longitudinal diagonal brace (21) and the lateral diagonal brace (22) is rotatably connected to the vertical support column (17) through the hinges (25). An adjusting screw (19) is inserted inside the vertical support column (17), and multiple clamping devices (18) are slidably provided.

2. The tunnel ventilation fan anti-seismic support as described in claim 1, characterized in that, The clamping device (18) includes a support block (30), one side of which slides against the inner wall of the vertical support column (17). A through threaded groove (31) is provided in the middle of the support block (30), and a clamping bolt (29) is threadedly connected to the threaded groove (31). One end of the clamping bolt (29) is fixedly connected to a clamping plate (32), and one side of the clamping plate (32) abuts against the outer surface of the adjusting screw (19).

3. The tunnel ventilation fan anti-seismic support as described in claim 1, characterized in that, The top end of the adjusting screw (19) is fixedly connected to the bearing beam (11) by an expansion bolt. The upper end of the adjusting screw (19) is threaded with a hexagonal nut (20), which abuts against the top end of the vertical support column (17). The bottom end of the adjusting screw (19) is threaded with two fastening nuts (27).

4. The tunnel ventilation fan anti-seismic support as described in claim 1, characterized in that, The outer surfaces of the longitudinal diagonal brace (21) and the lateral diagonal brace (22) are provided with multiple waist-shaped holes (23). The hinge (25) is fixedly connected to the longitudinal diagonal brace (21) and the lateral diagonal brace (22) respectively by bolts passing through the waist-shaped holes (23).

5. The tunnel ventilation fan anti-seismic support as described in claim 1, characterized in that, The outer surfaces of the two bottom support beams (12) are provided with multiple connection holes for the adjustment screw (19). The upper and lower surfaces of the bottom support beams (12) are fixedly installed with bottom connecting plates (26). The bottom end of the adjustment screw (19) passes through the connection hole and is fixedly connected to the bottom connecting plate (26) through the fastening nut (27). A washer (28) is sleeved on one side of the fastening nut (27). The washer (28) is located between the bottom connecting plate (26) and the fastening nut (27).

6. The tunnel ventilation fan anti-seismic support as described in claim 1, characterized in that, The hinge (25) includes two hinge plates, one end of which is fixedly connected by a high-strength bolt, and the other end of each hinge plate is provided with a bolt hole.

7. The tunnel ventilation fan anti-seismic support as described in claim 1, characterized in that, Both of the equipment mounting bases (13) are fixedly mounted with fan clamps (14) on their upper surfaces. Both fan clamps (14) are arc-shaped structures and have a rubber buffer layer on their inner side.

8. The tunnel ventilation fan anti-seismic support as described in claim 1, characterized in that, The angle between the vertical support column (17) and the longitudinal diagonal brace (21) and the lateral diagonal brace (22) is 45 degrees.

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