Rotary lifting stage structure

Abstract

The invention relates to the technical field of stage equipment, in particular to a rotary lifting stage structure which comprises a base, a lifting table top is mounted at the top of the base, the base is connected with the lifting table top through multiple sets of scissor lifting rods, and hydraulic rods are mounted at the bottoms of the scissor lifting rods; the base and the lifting table top are connected on the outer side of the shear fork lifting rod through a protection assembly, the lifting table top is installed on a control platform, and an inclined arc block assembly is installed on the outer side of the control platform. By arranging the inclined arc block assembly, an inclined arc block is stressed to push and compress an air pressure cavity, air forms damping torque through a flow-limiting two-way air pipe, overspeed of a lifting table top is mechanically restrained, meanwhile, bearing clamping stagnation or spring fatigue is directly reflected through air pressure fluctuation rule detection, efficient mechanical fault diagnosis is achieved, and the device is automatically suitable for various faults; the problem that fault processing lags behind when electric signals fail is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of stage equipment, and more particularly to a rotating lifting stage structure. Background Art

[0002] A stage is a facility that provides space for performances, helping to focus people's attention and enhance the viewing experience. Most stages are elevated above the ground, ensuring an unobstructed field of view and facilitating viewing. Due to their wide range of uses, some stages are often equipped with a rotating, elevating display platform for display items. The display platform's surface allows for enhanced visual effects as it rises and rotates.

[0003] The Chinese invention patent with publication number CN114319952A discloses a lifting and rotating stage display stand, including a top plate, a display board, a support plate, a limit rod, a lifting platform, a limit sleeve, a base, a hydraulic cylinder and a threaded tube. The invention is combined with the existing stage surface, which reduces the difficulty of installation and can achieve falling locking, making it safer and more stable. The Chinese invention patent with publication number CN118092526A discloses a music performance stage equipment safety adjustment and control system. By confirming the safe rising speed of the target lifting stage corresponding to the next rise and adjusting the stage position of the performers and confirming the safe rotation speed for the next rotation, the impact of speed instability on the load of the stage mechanical system is reduced, the risk of structural collapse or equipment failure is reduced, and threats to personnel safety are avoided. The stability of the rotation speed is improved, and the occurrence of speed fluctuations during the next rotation is effectively avoided, thereby improving the accuracy of control.

[0004] It can be seen that the current lifting and rotating stages still have certain defects in safety protection. First, they generally rely only on electronic sensors and hydraulic / motor control systems to achieve motion regulation and safety protection. When the electronic sensors fail or the signals are interfered with, the system cannot detect lifting imbalance (such as stalling and falling caused by hydraulic leakage) or rotation overspeed in real time. It can only trigger braking but lacks a mechanical active speed limit mechanism, which poses a risk of secondary accidents. At the same time, the scissor-type lifting structure usually relies on hydraulic self-locking, but sudden load impact can easily lead to locking failure. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a rotating lifting stage structure to solve the problems existing in the above-mentioned background technology.

[0006] The present invention provides the following technical solution: a rotating lifting stage structure, comprising a base, a lifting platform mounted on the top of the base, the base and the lifting platform being connected by a plurality of scissor lift rods, the bottoms of the scissor lift rods being mounted with hydraulic rods, the base and the lifting platform being connected on the outsides of the scissor lift rods by a protective assembly, the lifting platform being mounted on a control platform, the outside of the control platform being mounted with an oblique arc block assembly, the bottom of the control platform being mounted with a transmission motor and auxiliary assembly, the transmission motor and auxiliary assembly controlling the raising and lowering of the lifting platform; Furthermore, the protective assembly includes two stretching rods, which are mirror-mounted inside the protective shell. The stretching rods are divided into a one-way tooth plate and a connecting plate. One-way teeth are provided on the side of the one-way tooth plate. The teeth of the two stretching rods are in opposite directions. Two guide round blocks are fixedly connected to the front of the one-way tooth plate. The two guide round blocks are installed in the sliding groove on the inner side of the protective shell and work together to play a guiding role. Protective side plates are installed on both sides of the one-way tooth plate. One-way tooth grooves are provided on the inner side of the protective side plate. The one-way tooth grooves correspond to the one-way tooth plates, so that the stretching rods cannot shrink when stretched. Two fixed rods are fixedly connected to the side of the protective side plate, and a balance spring is sleeved on the fixed rod.

[0007] Furthermore, the control platform includes a lifting and fixing platform, a sliding groove is provided on the outer side of the lifting and fixing platform, the bevel arc block assembly is installed on the sliding groove, and the sliding groove is provided with an air pressure chamber at the bevel arc block assembly. The other end of the air pressure chamber is connected to the air flow tube through two two-way air pipes. A fixed end block and a sliding end block are installed at the bottom of the lifting and fixing platform. The fixed end block is fixedly installed at the bottom of the lifting and fixing platform, and the sliding end block is slidably installed at the bottom of the lifting and fixing platform. A central transmission hole is provided in the middle of the lifting and fixing platform, and the central straight rod is installed inside the central transmission hole.

[0008] Furthermore, the oblique arc block assembly includes an oblique block, which has the same installation position as the sliding ball body. A push plate is fixedly connected to the inner side of the oblique block. A gas pressure spring is sleeved between the push plate and the oblique block. The gas pressure spring applies an outward force to the oblique block. When the rotation of the lifting platform exceeds the speed limit, the internal pressure of the air chamber of the air pressure chamber is unbalanced to form a damping torque.

[0009] Furthermore, the auxiliary components include an airflow tube and a control box. An emergency battery and a control unit are installed inside the control box. The control unit is connected to each mechanism through electrical signals. A bidirectional airflow impeller is installed inside the airflow tube. A gate valve is installed between the bidirectional airflow impeller and the bidirectional air pipe. The size of the gate valve is controlled by the electrical signal of the control unit. The bidirectional airflow impeller is connected to a micro pneumatic generator. The airflow drives the impeller to rotate to generate electricity, which is stored in the emergency battery of the control box.

[0010] Furthermore, the lifting platform includes a platform body, and an auxiliary groove is opened on the outside of the platform body. The auxiliary groove is adapted to the LED emergency light strip and the stage lighting and sound effect equipment. In the event of a fault, the emergency battery controls the LED emergency light strip to start.

[0011] Furthermore, a pressure sensor is installed between the stretching rods. During lifting, gas enters and exits the stretching rods from the outside. The pressure sensor determines whether there is any abnormality in the lifting process by detecting the pressure change information of the incoming gas. When an abnormality occurs, the control unit rotates the cam knob to lock the protective side plate to the stretching rod.

[0012] Furthermore, an air whistle sounder is adapted to be installed inside the air flow tube. When the air flow passes through rapidly and at high speed, the rotation produces a high-frequency whistle similar to the sound of a turbine. At low speed, the air flow slows down to generate a low-frequency hum. The air whistle sounder changes the pitch through an adjustable resonant cavity. When the device is mainly based on the air whistle sounder, the exhaust port adopts a Helmholtz resonant cavity design, and the contour of the inclined block is engraved with irregular grooves, so that a pulsed airflow is generated when the inclined block is pushed, simulating the sound of a steam piston. The functions of the whistle generator are divided into active and passive. When passive, it is controlled by bidirectional tracheal gas, and when active, it is controlled by active input gas. It is used as a hummer in the fault stage.

[0013] Furthermore, a rotating hole is provided on the front of the protective shell, and a cam knob is installed inside the rotating hole. The cam knob consists of a rotating knob and a cam. A cam groove is provided in the middle position of the front of the protective side panel, and the cam knob is installed in the cam groove. The rotation of the cam knob is controlled by an electrical signal.

[0014] Furthermore, a pressure sensor is installed inside the bidirectional air pipe. Multiple pressure sensors are used to collect air pressure information and detect air path pressure fluctuations. At normal speed, the air pressure pulsates regularly; when the bearing is stuck, the air pressure peak value rises abnormally; when the spring is fatigued, the air pressure fluctuation frequency is delayed.

[0015] The technical effects and advantages of the present invention are as follows: 1. This invention incorporates a beveled arc block assembly, which facilitates the block's forceful push on the compressed air pressure chamber. Air flows through the flow-limiting, two-way air pipe to create a damping torque, mechanically suppressing overspeed on the lift platform. Furthermore, the system directly detects bearing sticking or spring fatigue by detecting air pressure fluctuations, enabling efficient mechanical fault diagnosis and automatically adapting to various faults. This resolves the issue of delayed fault processing when electrical signals fail.

[0016] 2. The present invention incorporates a protective assembly that utilizes the mirrored one-way toothed plates of the tension rod and the protective side plates to form a purely mechanical ratchet lock. This instantly locks the scissor rods in the event of hydraulic failure, preventing them from falling and achieving stable and effective safety protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the overall structure of the present invention before rising.

[0019] Figure 3 It is a schematic diagram of the scissor lift structure of the present invention.

[0020] Figure 4 This is a schematic diagram of the protective component structure assembly of the present invention.

[0021] Figure 5 This is a schematic diagram of the assembly of the control platform and the lifting platform of the present invention.

[0022] Figure 6 It is a schematic structural diagram of the oblique arc block assembly of the present invention.

[0023] Figure 7 Schematic diagram of the safety protection system of the present invention.

[0024] The accompanying drawings are marked as follows: 1. base; 2. lifting table; 201. table body; 202. auxiliary groove; 203. center straight rod; 204. sliding ball; 3. scissors lifting rod; 4. protective assembly; 401. stretching rod; 402. protective shell; 403. rotating hole; 404. protective side plate; 405. balance spring; 406. cam knob; 407. guide round block; 5. control platform; 501. lifting fixed platform; 502. sliding groove; 503. fixed end block; 504. sliding end block; 505. center transmission hole; 506. air pressure chamber; 507. two-way air pipe; 6. oblique arc block assembly; 601. oblique block; 602. push plate; 603. air pressure spring; 7. hydraulic rod; 8. transmission motor; 9. auxiliary assembly; 901. air flow pipe; 902. two-way air flow impeller; 903. control box. DETAILED DESCRIPTION

[0025] The technical solutions of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples. The rotary lifting stage structure involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] Reference Figure 1 and Figure 2The present invention provides a rotating lifting stage structure, including a base 1, a lifting platform 2 is installed on the top of the base 1, the base 1 and the lifting platform 2 are connected by multiple sets of scissor lift rods 3, the bottom of the scissor lift rods 3 are installed with hydraulic rods 7, the base 1 and the lifting platform 2 are connected on the outside of the scissor lift rods 3 through a protective component 4, the lifting platform 2 is installed on the control platform 5, the outside of the control platform 5 is installed with an oblique arc block component 6, the bottom of the control platform 5 is installed with a transmission motor 8 and an auxiliary component 9, the transmission motor 8 and the auxiliary component 9 control the rise and fall of the lifting platform 2; In this embodiment, it should be specifically explained that the speed of gas inlet and outlet controls the rotation speed of the lifting platform 2 .

[0027] The main difference between this embodiment and the prior art is that the interaction between the bevel arc block assembly 6 and the lifting platform 2 is used to control the inflow and outflow of gas, and the speed of the gas inflow and outflow is used to control the rotation speed of the lifting platform 2, thereby avoiding high-speed rotation and more serious consequences in the event of a control failure. At the same time, the damping effect of the gas is used to limit the rotation speed, thereby improving safety. Specifically, the protective assembly 4, the bevel arc block assembly 6, and the auxiliary assembly 9 are used; The above structure is the main structure of this embodiment, which solves the problem that the current rotating lifting stage does not have good fault handling capabilities during rotation and cannot effectively handle dangers when the electrical signal or sensor fails. The two-way airflow impeller 902 is an existing structure. The specific structure and connection method of the two-way airflow impeller 902 are not described in detail in this embodiment. In addition, the air whistle sounder and LED emergency light strip also belong to the existing technology. Therefore, this application does not make detailed limitations.

[0028] Reference Figure 4 The protective assembly 4 includes two stretching rods 401, which are mirror-imaged inside the protective shell 402. The stretching rod 401 is divided into a one-way tooth plate and a connecting plate. The side of the one-way tooth plate is provided with a one-way tooth. The teeth of the two stretching rods 401 are opposite. The front of the one-way tooth plate is fixedly connected to two guide round blocks 407. The two guide round blocks 407 are installed in the slide groove inside the protective shell 402 and act together to play a guiding role. Protective side plates 404 are installed on both sides of the one-way tooth plate. The inner side of the protective side plate 404 is provided with a one-way tooth groove. The one-way tooth groove corresponds to the one-way tooth plate, so that the stretching rod 401 cannot shrink when stretched. The side of the protective side plate 404 is fixedly connected to two fixing rods, and a balance spring 405 is sleeved on the fixing rod.

[0029] In this embodiment, it should be specifically explained that: a pressure sensor is installed between the stretching rods 401. When lifting, gas enters and exits the stretching rods 401 from the outside. The pressure sensor determines whether an abnormality occurs in the lifting process by detecting the pressure change information of the incoming gas. When an abnormality occurs, the control unit rotates the cam knob 406 to lock the protective side plate 404 to the stretching rod 401.

[0030] Reference Figure 5 The control platform 5 includes a lifting and fixing platform 501, a sliding groove 502 is provided on the outer side of the lifting and fixing platform 501, and the bevel arc block assembly 6 is installed on the sliding groove 502. The sliding groove 502 is located at the bevel arc block assembly 6 and is provided with an air pressure chamber 506. The other end of the air pressure chamber 506 is connected to the air flow tube 901 through two two-way air pipes 507. A fixed end block 503 and a sliding end block 504 are installed at the bottom of the lifting and fixing platform 501. The fixed end block 503 is fixedly installed at the bottom of the lifting and fixing platform 501, and the sliding end block 504 is slidably installed at the bottom of the lifting and fixing platform 501. A central transmission hole 505 is provided in the middle of the lifting and fixing platform 501, and the central straight rod 203 is installed inside the central transmission hole 505.

[0031] In this embodiment, it is necessary to specifically explain that: when the lifting platform 2 rotates, the sliding ball 204 pushes the inclined block 601 to move inward, compressing the internal gas of the air pressure chamber 506. The gas in the air pressure chamber 506 acts on the two-way air flow impeller 902 through the air flow tube 901. The two-way air flow impeller 902 charges the emergency battery in the control box 903. At the same time, the pressure sensor detects the pressure of the exhaust gas and then detects the rate and the rotation speed of the lifting platform 2, and judges whether it is safe based on regularity.

[0032] Reference Figure 6 The oblique arc block assembly 6 includes an oblique block 601. The oblique block 601 is installed at the same position as the sliding ball body 204. A push plate 602 is fixedly connected to the inner side of the oblique block 601. A gas spring 603 is sleeved between the push plate 602 and the oblique block 601. The gas spring 603 applies an outward force to the oblique block 601. When the rotation of the lifting platform 2 exceeds the speed limit, the internal pressure of the air pressure chamber 506 is unbalanced to form a damping torque.

[0033] In this embodiment, it should be specifically explained that: when a high-speed abnormal change occurs during rotation, since the two-way air pipe 507 has a maximum flow rate, the gas damping effect of the inclined block 601 automatically limits and reduces the rotation speed of the lifting platform 2 to a safe range.

[0034] Reference Figure 6The auxiliary component 9 includes an airflow tube 901 and a control box 903. An emergency battery and a control unit are installed inside the control box 903. The control unit is connected to each mechanism through electrical signals. A two-way airflow impeller 902 is installed inside the airflow tube 901. A gate valve is installed between the two-way airflow impeller 902 and the two-way air pipe 507. The size of the gate valve is controlled by the electrical signal of the control unit. The two-way airflow impeller 902 is connected to a micro-pneumatic generator. The airflow drives the impeller to rotate and generate electricity, which is stored in the emergency battery of the control box 903.

[0035] In this embodiment, it is necessary to specifically explain that: an air whistle sounder is installed inside the air flow tube 901. When the air flow passes through rapidly and at high speed, the rotation produces a high-frequency whistle similar to the sound of a turbine. At low speed, the air flow is relaxed to generate a low-frequency hum. The air whistle sounder changes the pitch through an adjustable resonant cavity. When the device is mainly based on the air whistle sounder, the exhaust port adopts a Helmholtz resonant cavity design, and the contour of the inclined block 601 is engraved with irregular grooves, so that when the inclined block 601 is pushed, a pulsed airflow is generated to simulate the sound of a steam piston. The functions of the whistle generator are divided into active and passive. When passive, it is controlled by the gas in the two-way air pipe 507, and when active, it is controlled by active input gas. It is used as a hummer in the fault stage.

[0036] Reference Figure 5 The lifting platform 2 includes a platform body 201, and an auxiliary groove 202 is opened on the outside of the platform body 201. The auxiliary groove 202 is adapted to the LED emergency light strip and the stage lighting and sound effect equipment. In the event of a fault, the emergency battery controls the LED emergency light strip to start.

[0037] In this embodiment, it should be specifically explained that a bevel gear is installed at the bottom of the central straight rod 203 , and the bevel gear is meshed and connected with the transmission motor 8 , and the transmission motor 8 controls the rotation of the lifting platform 2 .

[0038] Reference Figure 4 A rotating hole 403 is provided on the front of the protective shell 402, and a cam knob 406 is installed inside the rotating hole 403. The cam knob 406 consists of a rotating knob and a cam. A cam groove is provided in the middle position of the front of the protective side plate 404, and the cam knob 406 is installed in the cam groove. The rotation of the cam knob 406 is controlled by an electrical signal.

[0039] In this embodiment, it should be specifically explained that: when the cam knob 406 is horizontal, the protective side plate 404 is in an open state; when the cam knob 406 is vertical, the protective side plate 404 is in a closed state, and the one-way teeth of the protective side plate 404 are engaged with the stretch rod 401.

[0040] Reference Figure 4A pressure sensor is installed inside the two-way air pipe 507. Multiple pressure sensors are used to collect air pressure information and detect air path pressure fluctuations. At normal speed, the air pressure pulsates regularly. When the bearing is stuck, the air pressure peak value rises abnormally. When the spring is fatigued, the air pressure fluctuation frequency is delayed.

[0041] In this embodiment, it should be specifically explained that: when low-speed control failure occurs during rotation, the pressure sensor detects that the gas peak value of the bidirectional air pipe 507 increases abnormally and does not match the rotation speed. At this time, the control unit controls the gate valve to close.

[0042] Working principle of the present invention: The main problem solved by this embodiment is: utilizing the interaction between the oblique arc block assembly 6 and the lifting platform 2 to control the inflow and outflow of gas, utilizing the inflow and outflow speed of gas to control the rotation speed of the lifting platform 2, thereby avoiding high-speed rotation and more serious consequences in the event of a control failure, while utilizing the damping effect of the gas to limit the rotation speed, thereby improving safety, and solving the problem that the current rotating lifting stage does not have a good fault handling capability during rotation and cannot effectively handle dangers when electrical signals or sensors fail.

[0043] The specific steps are as follows: When ascending, the hydraulic rod 7 is activated, which drives the scissor lift rod 3 to retract, and the lifting platform 2 is pushed up through the action of the connecting rod. At the same time, the two stretching rods 401 are pulled outward in a mirrored manner, and the one-way teeth slide on the inner side of the protective side plate 404. At the same time, the external air enters between the two stretching rods 401 at a constant speed; During rotation, the transmission motor 8 is started, and the transmission motor 8 drives the lifting platform 2 to rotate through gear meshing. When the lifting platform 2 rotates, the sliding ball 204 pushes the inclined block 601 to move inward, compressing the internal gas of the air pressure chamber 506. The gas in the air pressure chamber 506 acts on the two-way air flow impeller 902 through the air flow tube 901. The two-way air flow impeller 902 charges the emergency battery in the control box 903. At the same time, the pressure sensor detects the pressure of the exhaust gas and then detects the rate and the rotation speed of the lifting platform 2. It judges whether it is safe based on regularity. In a safe environment, the control unit controls the gas inside the air flow tube 901 to pass through the air whistle sounder to produce the sound required by the environment; When an abnormality occurs during the ascent process, the lifting platform 2 stalls and descends, and the stretching rod 401 is protected by the one-way teeth; When an abnormality occurs during the descent process, the pressure sensor detects abnormal gas flow rate information at the discharge stretch rod 401, and the control unit controls the cam knob 406 to rotate and re-engage the protective side plate 404, using the one-way teeth for protection; When a high-speed abnormal change occurs during rotation, since the bidirectional air pipe 507 has a maximum flow rate, the gas damping effect of the inclined block 601 automatically limits and reduces the rotation speed of the lifting platform 2 to a safe range; When low-speed control failure occurs during rotation, the pressure sensor detects that the gas peak of the two-way air pipe 507 increases abnormally, which does not match the rotation speed. At this time, the control unit controls the gate valve to close. At this time, the two-way air pipe 507 no longer transmits gas, the position of the inclined block 601 is fixed, and the sliding ball 204 no longer pushes the inclined block 601 to move. At this time, the safety locking of the lifting platform 2 is completed.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rotating lifting stage structure, comprising a base (1), characterized in that: A lifting platform (2) is installed on the top of the base (1), the base (1) and the lifting platform (2) are connected by multiple sets of scissor lift rods (3), the bottom of the scissor lift rods (3) are installed with hydraulic rods (7), the base (1) and the lifting platform (2) are connected on the outside of the scissor lift rods (3) through a protective component (4), the lifting platform (2) is installed on the control platform (5), the outside of the control platform (5) is installed with an oblique arc block component (6), the bottom of the control platform (5) is installed with a transmission motor (8) and an auxiliary component (9), the transmission motor (8) and the auxiliary component (9) control the rise and fall of the lifting platform (2); The protective assembly (4) includes two stretching rods (401), which are mirror-imaged and mounted inside the protective housing (402). The stretching rods (401) are divided into a one-way tooth plate and a connecting plate. One-way teeth are provided on the side of the one-way tooth plate. The teeth of the two stretching rods (401) are in opposite directions. Two guide round blocks (407) are fixedly connected to the front of the one-way tooth plate. The two guide round blocks (407) are mounted in the sliding groove inside the protective housing (402) and act together to guide. Protective side plates (404) are mounted on both sides of the one-way tooth plate. One-way tooth grooves are provided on the inner side of the protective side plate (404). The one-way tooth grooves correspond to the one-way tooth plates, so that the stretching rods (401) cannot shrink when stretched. Two fixed rods are fixedly connected to the side of the protective side plate (404), and a balance spring (405) is sleeved on the fixed rod.

2. The rotary lifting stage structure according to claim 1, characterized in that: The control platform (5) includes a lifting and fixing platform (501), a sliding groove (502) is provided on the outer side of the lifting and fixing platform (501), an oblique arc block assembly (6) is installed on the sliding groove (502), and an air pressure chamber (506) is provided on the sliding groove (502) at the oblique arc block assembly (6). The other end of the air pressure chamber (506) is communicated with the air flow pipe (901) through two bidirectional air pipes (507). A fixed end block (503) and a sliding end block (504) are installed at the bottom of the lifting and fixing platform (501), the fixed end block (503) is fixedly installed at the bottom of the lifting and fixing platform (501), and the sliding end block (504) is slidably installed at the bottom of the lifting and fixing platform (501). A central transmission hole (505) is provided in the middle of the lifting and fixing platform (501), and the central straight rod (203) is installed inside the central transmission hole (505).

3. The rotary lifting stage structure according to claim 1, characterized in that: The oblique arc block assembly (6) includes an oblique block (601), the oblique block (601) and the sliding ball body (204) are installed at the same position, the inner side of the oblique block (601) is fixedly connected with a push plate (602), and a gas pressure spring (603) is sleeved between the push plate (602) and the oblique block (601). The gas pressure spring (603) applies an outward force to the oblique block (601), and when the rotation of the lifting platform (2) exceeds the speed, the internal pressure of the gas pressure chamber (506) is unbalanced to form a damping torque.

4. The rotary lifting stage structure according to claim 1, characterized in that: The auxiliary component (9) includes an airflow tube (901) and a control box (903). An emergency battery and a control unit are installed inside the control box (903). The control unit is connected to each mechanism through an electrical signal. A bidirectional airflow impeller (902) is installed inside the airflow tube (901). A gate valve is installed between the bidirectional airflow impeller (902) and the bidirectional air pipe (507). The size of the gate valve is controlled by an electrical signal from the control unit. The bidirectional airflow impeller (902) is connected to a micro-pneumatic generator. The airflow drives the impeller to rotate to generate electricity, which is stored in the emergency battery of the control box (903).

5. The rotary lifting stage structure according to claim 1, characterized in that: The lifting platform (2) comprises a platform body (201), an auxiliary groove (202) is provided on the outer side of the platform body (201), and the auxiliary groove (202) is adapted to accommodate an LED emergency light strip and stage lighting, shadow and sound effect equipment. In the event of a fault, an emergency battery controls the activation of the LED emergency light strip.

6. The rotary lifting stage structure according to claim 1, characterized in that: A pressure sensor is installed between the stretching rods (401). When the stretching rods (401) are lifted or lowered, gas enters and exits the stretching rods (401) from the outside. The pressure sensor determines whether an abnormality occurs during the lifting process by detecting pressure change information of the entering gas. When an abnormality occurs, the control unit rotates the cam knob (406) to lock the protective side plate (404) to the stretching rod (401).

7. The rotary lifting stage structure according to claim 4, characterized in that: The interior of the airflow tube (901) is adapted to be installed with an air whistle sounder. When the airflow passes through rapidly and at high speed, the rotation generates a high-frequency whistle similar to the sound of a turbine. When the airflow passes through slowly and at low speed, the airflow generates a low-frequency hum. The air whistle sounder changes the pitch through an adjustable resonant cavity. When the device is mainly based on the air whistle sounder, the exhaust port adopts a Helmholtz resonant cavity design. The contour of the inclined block (601) is engraved with irregular grooves, so that when the inclined block (601) is pushed, a pulsed airflow is generated to simulate the sound of a steam piston. The function of the whistle generator is divided into active and passive. When passive, it is controlled by the gas of the bidirectional air pipe (507). When active, it is controlled by the active input gas. It is used as a hummer in the fault stage.

8. The rotary lifting stage structure according to claim 1, characterized in that: The front of the protective housing (402) is provided with a rotation hole (403), and a cam knob (406) is installed inside the rotation hole (403). The cam knob (406) is composed of a rotation knob and a cam. A cam groove is provided in the middle of the front of the protective side plate (404), and the cam knob (406) is installed in the cam groove. The rotation of the cam knob (406) is controlled by an electrical signal.

9. The rotary lifting stage structure according to claim 2, characterized in that: A pressure sensor is installed inside the bidirectional air pipe (507). The multiple pressure sensors are used to collect air pressure information and detect air path pressure fluctuations. At normal speed, the air pressure pulsates regularly. When the bearing is stuck, the air pressure peak value rises abnormally. When the spring is fatigued, the air pressure fluctuation frequency is delayed.

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