Vertical recreational wind tunnel

Abstract

The application discloses a vertical amusement wind tunnel, which comprises a driving system (1), a tunnel body (2), a pry block system (5) and auxiliary facilities. The tunnel body (2) is in an inverted T shape. The driving system is provided in two sets and symmetrically installed on two sides of the tunnel body (2). The driving system (1) and the tunnel body (2) are both installed on the pry block system (5). The auxiliary facilities comprise a step ladder (3) and a sightseeing platform (4). The sightseeing platform (4) is arranged around the vertically upward extending part of the tunnel body (2). The step ladder (3) is arranged on the other side of the driving system. The pry block system (5) is in contact with the ground and comprises a tunnel body pry block (9), a small pulley pry block (11), an engine pry block (18) and a small bearing seat pry block (24). The driving system (1) is installed on the small pulley pry block (11), the engine pry block (18) and the small bearing seat pry block (24). The tunnel body (2) is installed on the tunnel body pry block (9). The vertical amusement wind tunnel is not limited by the hardness of the ground and the power supply capacity, and the utilization rate and the economic benefits are improved.

Description

Technical Field

[0001] This invention relates to the field of entertainment facility technology, and in particular to a portable and detachable inverted T-shaped vertical entertainment wind tunnel. Background Technology

[0002] With the development of recreational wind tunnel technology, a safe, thrilling, and exciting simulated skydiving and flight device has become a new direction in the design and development of recreational equipment. Most domestic recreational wind tunnels are fixed and cannot be disassembled and moved. Furthermore, their power systems are all driven by electric motors, thus requiring high-power electrical equipment as a power source. To meet the standard flight speed requirement (55m / s), the motor power is typically no less than 200kW. However, most entertainment venues or event sites do not have such a high-power temporary power supply. Thirdly, current recreational wind tunnels have very strict requirements regarding foundation settlement and flatness; excessively soft ground requires hardening treatment, increasing the infrastructure costs for the installation and application of recreational wind tunnels.

[0003] Therefore, increasing the efficiency of recreational wind tunnel applications and maximizing their economic benefits has become an important development direction for recreational wind tunnels. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides the following technical solution: a portable and detachable recreational wind tunnel that is not limited by power supply, consisting of a drive system, a tunnel body, a viewing platform, stairs, and skids. A diesel engine is used to solve the power supply constraint problem. The wind tunnel is installed as a whole on the skids, which solve the wind tunnel's requirements for the ground. Considering comprehensive factors such as energy supply and wind tunnel size, an inverted "T" dual power source is adopted, thereby reducing the drive requirements of a single power segment. The structure is simple, easy to assemble, portable, and highly adaptable.

[0005] The present invention provides a vertical recreational wind tunnel, comprising: a drive system, a tunnel body, a skid system, and auxiliary facilities; wherein the tunnel body is inverted T-shaped; the drive system is configured in two sets, symmetrically installed on both sides of the tunnel body; the drive system and the tunnel body are both installed on the skid system, and the auxiliary facilities are arranged around the vertically upward extension of the tunnel body and on the opposite side of the drive system.

[0006] Preferably, the auxiliary facilities include stairs and a viewing platform, the viewing platform being arranged around the vertically upward extension of the cave body, and the stairs being arranged on the opposite side of the drive system.

[0007] Preferably, the skid system is in contact with the ground and includes a tunnel skid, a small pulley skid, an engine skid, and a small bearing housing skid, wherein the drive system is respectively mounted on the small pulley skid, the engine skid, and the small bearing housing skid, and the tunnel is mounted on the tunnel skid.

[0008] Preferably, the tunnel body skid and the small pulley skid are separate components before the vertical entertainment wind tunnel is built. After the vertical entertainment wind tunnel is built, the tunnel body skid and the small pulley skid are fixedly connected by bolts.

[0009] Preferably, the drive system includes a diesel engine, a universal coupling, a small pulley bearing housing, a small pulley, a timing belt, a large pulley, a large pulley bearing housing, and a fan; wherein the diesel engine is connected to the small pulley bearing housing via the universal coupling, the small pulley is mounted on the small pulley bearing housing, the timing belt is arranged around the outside of the small pulley, the other side of the timing belt is arranged around the outside of the large pulley, the large pulley is mounted on one end of the large pulley bearing housing, and the other end of the large pulley bearing housing is connected to the fan, the fan's rotational motion compresses air to form a stable airflow field; the small pulley bearing housing and the small bearing housing skid are connected by connecting bolts.

[0010] Preferably, the drive system further includes vibration damping pads and counterweights, which are disposed between the diesel engine and the engine skid.

[0011] Preferably, a tensioning mechanism is provided on the synchronous belt for adjusting the tension of the synchronous belt; the tensioning mechanism includes a positive screw, positive and negative nuts, and a negative screw; the positive and negative nuts are disposed between the positive screw and the negative screw; the connecting bolt is provided with multiple elongated holes, and the center distance between the small pulley and the large pulley is adjusted by selecting the installation position of the elongated holes, thereby achieving the tensioning of the synchronous belt.

[0012] Preferably, the cavity is divided into two horizontally arranged symmetrical parts, each of which consists of a power section, a transition section, a corner section, a contraction section, a flight section, and a diffusion section connected in sequence; each section is an independent component, and the components are connected by flanges and bolts; wherein the power section and the transition section are arranged horizontally, the contraction section, the flight section, and the diffusion section are arranged vertically, and the corner section is located at the connection between the horizontal and vertical sections.

[0013] Preferably, the structural dimensions of the flight section and the diffusion section are comprehensively considered based on the number of personnel flying simultaneously, the required parachute altitude, and economic benefits; both the flight section and the diffusion section are made of plexiglass; the wind tunnel of the flight section has a wind speed of 55 m / s, a circular cross-section with a diameter of 2.6 m and a length of 3.3 m; the diffusion section is used to further decelerate the airflow and guide it into the atmosphere, with an inlet diameter of 2.6 m, an outlet diameter of 3.6 m, and a length of 3.3 m.

[0014] Preferably, the power section consists of a collector, a power section cavity, a power section bearing housing, and a power section fan; wherein, a collector is installed at the front end of the power section to allow airflow to enter the power section smoothly without separation; the collector is configured as a flared opening with a quarter-circle arc as the generatrix and a radius of 0.5m; a protective net is installed at the inlet of the collector; the pipe of the power section is a circular straight pipe section with a diameter of 2.5m and a length of 2.5m.

[0015] Preferably, the corner section consists of a corner section cavity and guide vanes; the corner radius r of the corner section is 0.6m, the chord length is 820mm, the number of guide vanes is 10, and the spacing between the guide vanes is 330mm.

[0016] Preferably, the contraction section is a contraction duct that accelerates the airflow uniformly, the contraction ratio of the contraction section is 3, and a safety spring net is provided at the connection between the upper outlet of the contraction section and the flight section. The safety spring net is composed of high-strength steel wire and tension spring.

[0017] Preferably, the power section, transition section, corner section and contraction section are all made of steel tunnel and formed into steel plate flow channels by steel plate roll forming; T-shaped ribs are provided on the steel plate flow channels to strengthen them; the dimensions of the T-shaped cross-section of the T-shaped ribs are obtained through finite element analysis of the wind tunnel to obtain the optimal dimensions.

[0018] Preferably, multiple tension lines are provided between the diffuser section and the observation deck to support and reinforce the diffuser section; the two ends of the tension lines are connected in the same way and a tensioning mechanism is provided to tension the tension lines. The tensioning mechanism consists of a first nut, a second nut, a hanging ring, and a line clamp; the line clamp fixes the tension line to the hanging ring, and the hanging ring is fixedly connected to the diffuser section through the first nut and the second nut. The first nut and the second nut are respectively connected to the upper and lower sides of the diffuser section through a fixed shaft.

[0019] Preferably, the observation deck consists of a railing, a railing mounting base, a first platform, a door, and a second platform; the railing mounting base is welded and fixed to the first platform and the second platform, and the railing is installed in the railing mounting base by plugging and unplugging; the observation deck is supported by multiple pillars on its outer side, and a connecting flange is provided at the bottom of the inner side of the observation deck, the connecting flange being supported on the contraction section.

[0020] The beneficial effects of this invention include:

[0021] 1) This wind tunnel has its own foundation. The pry bar adjusts the flatness and hardness of the ground very well, so there is no need to make a solid wind tunnel foundation. It is not restricted by the softness or hardness of the ground and can be installed on softer ground such as sand, which simplifies the construction of the foundation of the entertainment wind tunnel.

[0022] 2) It is not limited by power supply capacity and can be built in any amusement park or square; thus improving the utilization rate and economic benefits of the wind tunnel;

[0023] 3) The use of an external diesel engine as the power source, coupled with synchronous belt drive, solved the power source problem;

[0024] 4) The tension of the synchronous belt in the drive system is adjusted by using positive and negative nuts. The tensioning mechanism is simple and easy to adjust, which is conducive to promoting the application of synchronous belts.

[0025] 5) The use of universal couplings can reduce the coaxiality requirements between the diesel engine and the small pulley bearing housing;

[0026] 6) Independent engine skids, vibration damping pads, and counterweights reduce the impact of diesel engine vibration on other components;

[0027] 7) It is portable, which allows more people to understand wind tunnels and experience the fun of safe flight, thus promoting the development of entertainment facilities and wind tunnels. Attached Figure Description

[0028] Figure 1 is an overall structural diagram of the inverted "T"-shaped vertical entertainment wind tunnel according to a preferred embodiment of the present invention;

[0029] Figure 2(a) is a three-dimensional schematic diagram of the overall structure of the drive system according to a preferred embodiment of the present invention;

[0030] Figure 2(b) is a front view of the drive system according to a preferred embodiment of the present invention;

[0031] Figure 3 is a schematic diagram of the tensioning mechanism of the drive system according to a preferred embodiment of the present invention;

[0032] Figure 4 is a schematic diagram of the cave structure according to a preferred embodiment of the present invention;

[0033] Figure 5(a) is a three-dimensional structural diagram of the shrink section safety spring net according to a preferred embodiment of the present invention;

[0034] Figure 5(b) is a schematic diagram of the planar structure of the safety spring net according to a preferred embodiment of the present invention;

[0035] Figure 6 is a schematic diagram of the tensioning mechanism according to a preferred embodiment of the present invention;

[0036] Figure 7 is a schematic diagram of the observation deck structure according to a preferred embodiment of the present invention. Detailed Implementation

[0037] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0038] Referring to Figure 1, this embodiment provides a vertical entertainment wind tunnel, including: a drive system 1, a tunnel body 2, a skid system 5, and auxiliary facilities; wherein the tunnel body 2 is inverted T-shaped; two drive systems are configured, which are symmetrically installed on both sides of the inverted T-shaped tunnel body 2. The drive system is the power source of the entire wind tunnel and is an important core technology to ensure the airflow speed inside the flight cabin; the drive system 1 and the tunnel body 2 are both installed on the skid system 5, and the auxiliary facilities are arranged around the vertically upward extension of the inverted T-shaped tunnel body 2 and on the opposite side of the drive system.

[0039] In a preferred embodiment, the auxiliary facilities include a staircase 3 and a viewing platform 4. The viewing platform 4 is arranged around the vertically upward extension of the inverted T-shaped cave 2, and the staircase 3 is arranged on the opposite side of the drive system.

[0040] In a preferred embodiment, the skid system 5 is in contact with the ground and includes a tunnel skid 9, a small pulley skid 11, an engine skid 18, and a small bearing seat skid 24. The drive system 1 is mounted on the small pulley skid 11, the engine skid 18, and the small bearing seat skid 24, respectively, and the tunnel body 2 is mounted on the tunnel skid 9. Using the skid system 5 can address the stringent requirements of wind tunnels regarding ground hardness, reduce the requirements for infrastructure, and greatly expand its application range.

[0041] As a preferred embodiment, considering processing and transportation needs, the tunnel body skid 9 and the small pulley skid 11 are separate components before the vertical entertainment wind tunnel is built. After the vertical entertainment wind tunnel is built, the tunnel body skid 9 and the small pulley skid 11 are fixedly connected by bolts.

[0042] Referring to Figures 2(a) and 2(b), in a preferred embodiment, the drive system includes a diesel engine 17, a universal coupling 14, a small pulley bearing housing 13, a small pulley (12), a timing belt 10, a large pulley 8, a large pulley bearing housing 7, and a fan 6; wherein the diesel engine 17 is connected to the small pulley bearing housing 13 via the universal coupling 14, the small pulley (12) is mounted on the small pulley bearing housing 13, the timing belt 10 is arranged around the outside of the small pulley 12, the other side of the timing belt 10 is arranged around the outside of the large pulley 8, the large pulley 8 is mounted on one end of the large pulley bearing housing 7, and the other end of the large pulley bearing housing 7 is connected to the fan 6, and the fan's rotational motion compresses air to form a stable airflow field; the small pulley bearing housing 13 and the small bearing housing skid 24 are connected by connecting bolts 23.

[0043] The driving force transmission path of the drive system: The diesel engine 17 drives the small pulley (12) to rotate through the universal coupling 14 and the small pulley bearing seat 13. The small pulley (12) drives the synchronous belt 10 to move, thereby driving the large pulley 8 and the fan 6 to rotate. The large pulley bearing seat 7 is connected to the large pulley 8 at one end and to the fan 6 at the other end. The fan's rotational motion compresses air to form a stable airflow field.

[0044] In a preferred embodiment, the drive system further includes a vibration isolation pad 15 and a counterweight 16, which are disposed between the diesel engine 17 and the engine skid 18.

[0045] Referring to Figure 3, in a preferred embodiment, a tensioning mechanism 19 is provided on the synchronous belt 10 to adjust the tension of the synchronous belt 10; the tensioning mechanism 19 includes a positive screw 20, a positive and negative nut 21, and a negative screw 22; the positive and negative nut 21 is disposed between the positive screw 20 and the negative screw 22; multiple elongated holes are provided on the connecting bolt 23, and the center distance between the small pulley 12 and the large pulley 8 is adjusted by selecting the installation position of the elongated holes, thereby achieving the tension of the synchronous belt 10.

[0046] Advantages of the drive system:

[0047] A. The application of universal coupling 14 can reduce the coaxiality requirement between diesel engine 17 and small pulley bearing housing 13.

[0048] B. Independent engine skid 18, vibration damping pad 15 and counterweight 16 reduce the impact of diesel engine 17 vibration on other components;

[0049] C. The tensioning of the synchronous belt is achieved by using a tensioning mechanism 19 that is easy to install and adjust.

[0050] Referring to Figure 4, in a preferred embodiment, the cavity 2 is divided into two horizontally arranged symmetrical parts. Each part consists of a power section 25, a transition section 26, a corner section 27, a contraction section 28, a flight section 29, and a diffuser section 30 connected in sequence. Each section is an independent component, and the components are connected by flanges and bolts. The power section 25 and transition section 26 are horizontally arranged, while the contraction section 28, flight section 29, and diffuser section 30 are vertically arranged. The corner section 27 is located at the junction of the horizontal and vertical sections. This design facilitates transportation and disassembly.

[0051] In a preferred embodiment, flight section 29 and diffuser section 30 are the personnel parachute and flight section segments, forming the core of the wind tunnel. The structural dimensions of these two sections are comprehensively considered based on the number of personnel flying simultaneously, the required parachute altitude, and economic efficiency. The remaining sections serve to meet the requirements of these two sections. For ease of observation and flight experience, both flight section 29 and diffuser section 30 are made of plexiglass. The wind tunnel wind speed of flight section 29 is 55 m / s, with a circular cross-section, a diameter of 2.6 m, and a length of 3.3 m. Diffuser section 30 is used to further decelerate the airflow and guide it towards the atmosphere. For a direct current wind tunnel, exit loss is a significant portion of the loss; therefore, appropriately increasing the exit area is beneficial for reducing exit loss. Thus, in this embodiment, the inlet diameter of diffuser section 30 is set to 2.6 m, the exit diameter to 3.6 m, and the length to 3.3 m.

[0052] In a preferred embodiment, the power section 25 comprises a collector, a power section cavity, a power section bearing housing, and a power section fan. The collector is located at the front end of the power section 25 to ensure smooth, unseparated airflow entering the power section 25. In this embodiment, the collector is configured as a flared opening with a quarter-circle generatrix and a radius of 0.5m. To prevent debris from entering the power section and damaging the blades, a protective mesh is installed at the collector inlet. The duct of the power section 25 is a circular straight pipe section with a diameter of 2.5m and a length of 2.5m.

[0053] In a preferred embodiment, the corner section 27 consists of a corner section cavity and guide vanes. To ensure that the airflow changes direction without separation when passing through the corner section 27, guide vanes must be installed in the corner section. After adding guide vanes, relative to keeping the local turning radius and wind tunnel height constant, the centrifugal force of the airflow turning acts on the guide vanes, avoiding an increase in airflow pressure and making the flow smoother. In this embodiment, the corner radius r of the corner section 27 is 0.6m, the chord length is 820mm, the number of guide vanes is 10, and the spacing between the guide vanes is 330mm.

[0054] In a preferred embodiment, the contraction section 28 is a contraction duct that uniformly accelerates the airflow, and no separation occurs on the tunnel wall as the airflow flows along the contraction section 28. This section is relatively difficult to manufacture. Considering that this is an recreational wind tunnel, the quality requirements for the wind tunnel flow field are not high, but economic efficiency is a priority. Therefore, a contraction ratio of 3 is selected for the contraction section, which ensures both flow field quality and economic efficiency.

[0055] Referring to Figures 5(a) and 5(b), a safety spring net 31 is installed at the connection between the upper outlet of the contraction section 28 and the flight section 29. The safety spring net 31 is composed of high-strength steel wire 32 and tension springs 33. The tension springs 33 at both ends of the high-strength steel wire 32 mainly serve to increase the elasticity of the net and improve safety in the event of a fall during flight. The flight section 29 and the diffusion section 30 are sections for flight simulation and parachuting. To enhance the flight experience for the pilots and the viewing experience for waiting personnel, these two sections are made of plexiglass.

[0056] Under the influence of aerodynamic forces, the tunnel 2 mainly bears the pressure difference between the inside and outside of the tunnel caused by the airflow velocity and the aerodynamic axial force. The sections that bear the greater aerodynamic forces are the power section 25, the transition section 26, the corner section 27, and the contraction section 28. Therefore, the sections with the greater stress—power section 25, transition section 26, corner section 27, and contraction section 28—are all made of steel. In this embodiment, the power section 25, transition section 26, corner section 27, and contraction section 28 are all formed by rolling steel plates to create steel plate flow channels.

[0057] In a preferred embodiment, T-shaped ribs 29 are provided on the steel plate flow channel to strengthen it. The dimensions of the T-shaped section 29' of the T-shaped ribs 29 are obtained through finite element analysis of the wind tunnel; of course, those skilled in the art should know that the optimal dimensions are obtained by performing finite element analysis on the whole, taking the overall dimensions, power, wind speed requirements, and design experience of the wind tunnel as boundary conditions, and are not a function of a single factor.

[0058] In a preferred embodiment, multiple tension wires 40 are provided between the diffusion section and the observation deck 4 to support and reinforce the diffusion section 30. In this embodiment, four tension wires 40 are provided to support and reinforce the diffusion section 30.

[0059] As shown in Figure 6, the connection methods at both ends of the tension line 40 are the same. In order for the tension line to increase the rigidity of the system, it is necessary to tension the tension line. Therefore, a tensioning mechanism is also provided to tension the tension line 40. The tensioning mechanism consists of a first nut 42, a second nut 43, a lifting ring 44, and a wire clamp 45. The wire clamp 45 fixes the tension line 40 to the lifting ring 44. The lifting ring 44 is fixedly connected to the diffuser section 30 through the first nut 42 and the second nut 43. The first nut 42 and the second nut 43 are respectively connected to the upper and lower sides of the diffuser section 30 through a fixed shaft.

[0060] Tensioning method for line 40: Use line clips 45 to fix line 40 to the lifting eye 44. Tensioning is achieved by adjusting nuts 142 and 243. This method is simple in structure, low in cost, and easy to operate.

[0061] As shown in Figure 7, in a preferred embodiment, the observation deck 4 consists of a railing 34, a railing mounting base 35, a first platform 36, a door 37, and a second platform 38. To facilitate the installation and disassembly of the observation deck 4, it is divided into two platforms: the first platform 36 and the second platform 38. The railing mounting base 35 is welded and fixed to the first platform 36 and the second platform 38. The railing 34 is installed in the railing mounting base 35 by insertion and removal. Multiple support pillars 39 (12 in this embodiment; however, those skilled in the art can adjust the number according to strength requirements, all within the scope of this invention) are used to support the observation deck 4 on its outer side. A connecting flange is provided at the bottom inner side of the observation deck 4, and the connecting flange is supported by the contraction section 28.

[0062] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention. Clearly, those skilled in the art can make various alterations and modifications to the invention without departing from its spirit and scope. Thus, if these modifications and modifications of the invention fall within the scope of the claims and their equivalents, the invention is also intended to include these modifications and modifications.

Claims

1. A vertical recreational wind tunnel, characterized in that, include: Drive system (1), tunnel body (2), skid system (5) and auxiliary facilities; The cavity (2) is inverted T-shaped; the drive system is set in two sets, which are symmetrically installed on both sides of the cavity (2); the drive system (1) and the cavity (2) are both installed on the skid system (5); the auxiliary facilities are arranged around the vertically upward extension of the cavity (2) and on the side opposite to the drive system. The skid system (5) is in contact with the ground and includes a tunnel skid (9), a small pulley skid (11), an engine skid (18), and a small bearing seat skid (24). The drive system (1) is installed on the small pulley skid (11), the engine skid (18), and the small bearing seat skid (24), respectively. The tunnel (2) is installed on the tunnel skid (9). The drive system includes a diesel engine (17), a universal coupling (14), a small pulley bearing housing (13), a small pulley (12), a synchronous belt (10), a large pulley (8), a large pulley bearing housing (7), and a fan (6); wherein the diesel engine (17) is connected to the small pulley bearing housing (13) via the universal coupling (14), the small pulley (12) is mounted on the small pulley bearing housing (13), one side of the synchronous belt (10) is arranged around the outside of the small pulley (12), the other side of the synchronous belt (10) is arranged around the outside of the large pulley (8), the large pulley (8) is mounted on one end of the large pulley bearing housing (7), and the other end of the large pulley bearing housing (7) is connected to the fan (6), and the fan's rotational motion compresses air to form a stable airflow field; the small pulley bearing housing (13) and the small bearing housing skid (24) are connected by connecting bolts (23); The timing belt (10) is provided with a tensioning mechanism (19) for adjusting the tension of the timing belt (10); the tensioning mechanism (19) includes a positive screw (20), a positive and negative nut (21) and a negative screw (22); the positive and negative nut (21) is located between the positive screw (20) and the negative screw (22); the connecting bolt (23) is provided with multiple elongated holes, and the center distance between the small pulley (12) and the large pulley (8) is adjusted by selecting the installation position of the elongated holes, thereby achieving the tension of the timing belt (10).

2. The vertical recreational wind tunnel according to claim 1, characterized in that, The auxiliary facilities include a staircase (3) and a viewing platform (4). The viewing platform (4) is arranged around the vertically upward extension of the cave body (2), and the staircase (3) is arranged on the side opposite to the drive system.

3. A vertical recreational wind tunnel according to claim 1, characterized in that, The tunnel body pry bar (9) and the small pulley pry bar (11) are separate components before the vertical entertainment wind tunnel is built. After the vertical entertainment wind tunnel is built, the tunnel body pry bar (9) and the small pulley pry bar (11) are fixedly connected by bolts.

4. A vertical recreational wind tunnel according to claim 2, characterized in that, The cavity (2) is divided into two symmetrical parts, each of which consists of a power section (25), a transition section (26), a corner section (27), a contraction section (28), a flight section (29), and a diffusion section (30) connected in sequence. Each section is an independent component, and the components are connected by flanges and bolts. The power section (25) and the transition section (26) are arranged horizontally, while the contraction section (28), the flight section (29), and the diffusion section (30) are arranged vertically. The corner section (27) is located at the connection between the horizontal and vertical sections.

5. A vertical recreational wind tunnel according to claim 4, characterized in that, A safety spring net (31) is provided at the connection between the upper outlet of the contraction section (28) and the flight section (29). The safety spring net (31) is composed of high-strength steel wire (32) and tension spring (33).

6. A vertical recreational wind tunnel according to claim 5, characterized in that, Multiple tension lines (40) are provided between the diffuser section (30) and the observation platform (4) to support and strengthen the diffuser section (30). The two ends of the tension lines (40) are connected in the same way and a tensioning mechanism is provided to tension the tension lines (40). The tensioning mechanism consists of a first nut (42), a second nut (43), a hanging ring (44), and a line clamp (45). The line clamp (45) fixes the tension line (40) to the hanging ring (44). The hanging ring (44) is fixedly connected to the diffuser section (30) through the first nut (42) and the second nut (43). The first nut (42) and the second nut (43) are respectively connected to the upper and lower sides of the diffuser section (30) through a fixed shaft.

7. A vertical recreational wind tunnel according to claim 4, characterized in that, The observation deck (4) consists of a railing (34), a railing mounting base (35), a first platform (36), a door (37), and a second platform (38). The railing mounting base (35) is welded and fixed to the first platform (36) and the second platform (38). The railing (34) is installed in the railing mounting base (35) by plugging and unplugging. Multiple pillars (39) are used to support the observation deck (4) on the outside. A connecting flange is provided at the bottom of the inner side of the observation deck (4). The connecting flange is supported on the contraction section (28).

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