Foam stabilizing frame with height self-adaptive adjustment function and height self-adaptive adjustment method

Abstract

The invention discloses a height self-adaptive adjusting foam stabilizing frame and a height self-adaptive adjusting method. The height self-adaptive adjusting foam stabilizing frame comprises an annular support, horizontal adjusting assemblies arranged on the annular support at intervals, an outer barrel frame and a vertical adjusting mechanism. The outer cylinder frame and the annular support are concentrically sleeved and connected through an axial adjusting pair. The vertical adjusting mechanism is used for driving the annular support to reciprocate in the axis direction of the outer cylinder frame. According to the bubble stabilizing frame, height self-adaptive adjustment in the vertical direction is achieved, dynamic deformation of film bubbles in the vertical direction can be responded in real time, the problem that the thickness of a film is not uniform due to misalignment of the position of a cooling line is effectively solved, and the quality stability of the film is improved; and meanwhile, the adaptability to different working conditions is enhanced, the operation complexity and the downtime during production switching are reduced, and the flexibility and the production efficiency of a production line are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bubble stabilizing racks, and in particular to a bubble stabilizing rack with self-adaptive height adjustment and a self-adaptive height adjustment method. Background Art

[0002] In the plastic film blow molding process, the bubble stabilizing rack is a key device for maintaining the stability of the bubble shape. Its main function is to form a bubble channel through the space formed by the annular bracket and the internal horizontal adjustment component, offsetting the radial shaking of the bubble during the blowing process, and ensuring that the bubble can rise smoothly along the preset path to the cooling system. A typical mechanism is a bubble stabilizing rack for film blowing used in the production of environmentally friendly plastic bags disclosed in application number 2023110647799. Currently, the bubble stabilization racks used in the industry are generally fixed installations. Once their position is determined during the production line commissioning phase, their height cannot be adjusted to accommodate changes in actual production conditions. However, during the film blowing process, the bubble's shape is dynamically affected by a variety of factors, such as fluctuations in the raw material's molten state, changes in inflation pressure, fine-tuning of the pull-off speed, and variations in ambient temperature and humidity. These factors can all lead to unexpected vertical deformation of the bubble, such as changes in bubble height and displacement of the expansion point. Because existing bubble stabilization racks cannot respond to the dynamic deformation of the film bubble in real time in the vertical direction, their relative position to the cooling system is difficult to maintain precise alignment. When the actual position of the film bubble deviates from the preset cooling line, the cooling medium (such as cold air) cannot evenly apply to the bubble surface, resulting in different cooling rates in different areas of the bubble. This uneven cooling directly leads to uneven distribution of the film through the thickness, which not only reduces the product qualification rate but also may affect key indicators such as the film's mechanical properties and light transmittance, resulting in significant quality losses and increased costs for manufacturers. In addition, for the production scenarios of multiple varieties and specifications of films, there are large differences in the bubble morphology parameters of different products. The bubble stabilizing rack with a fixed height needs to be frequently mechanically disassembled and reinstalled to adapt to production switching. This not only increases the complexity of operation and downtime, but also makes it difficult to ensure adjustment accuracy, seriously restricting the flexibility and production efficiency of the production line. Therefore, developing a bubble stabilizing rack that can be adjusted in height to solve the problem of uneven film thickness caused by the inability of existing fixed-mounted bubble stabilizing racks to adapt to changes in vertical working conditions has become a technical need that needs to be urgently addressed in this field. Summary of the Invention

[0003] In view of the deficiencies in the background technology, a highly adaptively adjustable bubble stabilizing rack and a highly adaptive adjustment method are provided.

[0004] The technical solution adopted by the present invention is: a highly adaptively adjustable bubble stabilizing frame, comprising an annular frame and a horizontal adjustment component spaced apart on the annular frame, wherein a bubble channel is formed in the horizontal adjustment component for the bubble to pass through, and further comprising an outer cylinder frame and a vertical adjustment mechanism; The outer cylinder frame and the annular bracket are concentrically sleeved, and the outer cylinder frame and the annular bracket are connected via an axial adjustment pair; The vertical adjustment mechanism is used to drive the annular bracket to reciprocate along the axis direction of the outer cylinder frame.

[0005] Furthermore, the axial adjustment pairs are multiple and are evenly distributed axially between the outer cylinder frame and the annular bracket; The axial adjustment pair includes a first bearing seat arranged at both ends of the outer cylinder frame, a first screw rod with both ends rotatingly matched with the first bearing seat, and a first screw sleeve arranged on the annular bracket, and the first screw rod is threadedly connected to the first screw sleeve.

[0006] Furthermore, the vertical adjustment mechanism includes a first rotary drive member, a first input gear, a first linkage gear ring and multiple first linkage gears, the first input gear is fixed on the first screw of one of the axial adjustment pairs, the first linkage gear is connected to the first screw of the axial adjustment pair, the first driving gear is connected to the output end of the first rotary drive member, the first driving gear is driven and connected to the first input gear through a transmission chain, and the first linkage gear ring is driven and connected to the multiple first linkage gears.

[0007] Furthermore, it also includes a motor base, the first rotating drive component is fixed to the upper end of the outer cylinder frame through the motor base, and a position-adjustable tension adjustment gear is provided on the outer cylinder frame located on one side of the transmission chain, and the tension adjustment gear is meshed with the transmission chain.

[0008] Furthermore, the horizontal adjustment assembly includes a second rotating drive member fixed on the annular bracket, a second driving gear, a second linkage gear ring and multiple adjustment mechanisms. The output end of the second rotating drive member is connected to the second driving gear, and the second linkage gear ring is driven and connected to the second driving gear and the second linkage gear of the adjustment mechanism, and is used to synchronously drive multiple adjustment mechanisms to perform synchronous opening and closing adjustments.

[0009] Further, it further includes a slide rail and a slider. The adjusting mechanism includes a second screw rod, second bearing seats, an upper support plate, a lower support plate, a connecting plate, a first hinge plate, a second hinge plate, a bubble stabilizing plate, and a bubble stabilizing group. One end of the upper support plate is fixed to the upper end of the annular bracket, and the other end is rotatably connected to the upper end of the second hinge plate. One end of the connecting plate is fixedly connected to the bubble stabilizing plate, and the other end is rotatably connected to the first hinge plate. One end of the lower support plate is rotatably connected to the lower end of the first hinge plate, and a screw hole is provided at the other end. The second bearing seats are respectively fixed on the upper and lower sides of the annular bracket. The two ends of the second screw rod are respectively rotatably connected to the second bearing seats, and the second screw rod is screwed with the screw hole. The lower end of the second hinge plate is slidably matched with the lower end of the bubble stabilizing plate through the slide rail and the slider; The middle parts of the first hinge plate and the second hinge plate are cross - arranged and rotatably connected through a pin shaft; The second linkage gear is fixedly connected to the upper end of the second screw rod, and the second linkage ring is meshed and driven with the second driving gear and the second linkage gear.

[0010] Further, the bubble stabilizing group includes a "C" - shaped frame fixed on the bubble stabilizing plate and a roller shaft rotatably connected inside the "C" - shaped frame.

[0011] Further, it further includes a first intermediate gear and a second intermediate gear. The first intermediate gear is arranged on the outer cylinder bracket between the first linkage gear and the first linkage gear, and the second intermediate gear is rotatably connected to the first screw sleeve.

[0012] Further, it further includes a laser rangefinder, a film bubble detection device and a controller. The position sensor is fixed on the annular bracket for real - time detecting the distance L from the air ring mouth to the film bubble surface; the film bubble detection device is arranged on the annular bracket for detecting the film bubble diameter D; The controller is configured to execute: Generate a first adjustment signal according to the distance L, and drive the vertical adjustment mechanism to lift the annular bracket to the target height H, where H = f(L); Generate a second adjustment signal according to the film bubble diameter D, and drive the horizontal adjustment component to synchronously adjust the radial distance of the film bubble channel, where the distance R = g(D).

[0013] This application also provides a method for self - adapting adjustment of the height of the bubble stabilizing frame, which is characterized in that: It includes the following steps: (1) Position signal acquisition: Through a laser rangefinder fixed at a preset distance above the air ring mouth, the distance from the air ring mouth to the film bubble surface is detected in real time, where the preset distance is 1 - 2 meters, corresponding to the process position of the film bubble cooling line; (2) Height control operation: The controller calculates the target height according to the collected distance signal, and a function mapping relationship is established between the target height and the distance signal; (3) Vertical positioning of the annular bracket: The vertical adjustment mechanism responds to the instructions of the controller and drives the annular bracket to rise and fall along the axis of the outer cylinder frame until the center of the annular bracket is aligned with the position of the film bubble cooling line.

[0014] The beneficial effects of the present invention are: 1. This bubble stabilization frame transcends the limitations of traditional fixed installation methods, flexibly adapting to changes in bubble morphology under diverse production conditions, such as fluctuations in the raw material's melt state, adjustments in inflation pressure, and changes in pulling speed. When switching between production runs of multiple film varieties and specifications, the bubble stabilization frame's height can be quickly adjusted simply through a vertical adjustment mechanism, eliminating the need for mechanical disassembly and reinstallation. This reduces downtime, operational complexity, and production commissioning costs. 2. Optimize bubble stability and improve production efficiency: The annular bracket is connected to the outer cylinder frame through an axial adjustment joint. Combined with the drive of the vertical adjustment mechanism, the vertical adjustment of the bubble stabilization frame is more stable and reliable. This structural design effectively offsets unexpected vertical movement of the bubble, further enhancing bubble stability and ensuring that the bubble rises smoothly along the preset path. This reduces production interruptions caused by bubble instability and improves overall production efficiency.

[0015] In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages.

[0016] The present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 Schematic diagram of the structure with the membrane bubble hidden.

[0019] Figure 3 Schematic diagram of the structure of the adjustment mechanism.

[0020] Figure 1-3In Chinese: 100, annular bracket; 200, horizontal adjustment component; 300, membrane bubble; 400, outer cylinder frame; 500, vertical adjustment mechanism; 600, axial adjustment pair; 601, first bearing seat; 602, first screw; 603, first screw sleeve; 501, first rotation drive; 502, first input gear; 503, first linkage gear ring; 504, first linkage gear; 505, first driving gear; 506, drive chain; 507, motor base; 508, tension adjustment gear; 201, second rotation drive; 202, second driving gear; 203, second linkage gear ring; 204, adjustment mechanism; 205, second screw; 206, second bearing seat; 207, upper support plate; 208, lower support plate; 209, first hinge plate; 210, second hinge plate; 211, bubble stabilizing plate; 212, screw hole; 213, slide rail and slider; 214, pin shaft; 215, "C" - shaped frame; 216, roller shaft; 217, connecting plate; 218, second linkage gear; 700, first intermediate gear; 800, second intermediate gear; 900, laser rangefinder; 910, membrane bubble detection device Detailed implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0022] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a certain specific posture (as shown in the accompanying drawings). If this specific posture changes, the directional indications will also change accordingly.

[0023] The present invention provides a bubble stabilizing frame with height self - adaptive adjustment.

[0024] In this embodiment, referring to Figure 1-3 , this bubble stabilizing frame with height self - adaptive adjustment includes an annular bracket 100 and horizontal adjustment components 200 arranged at intervals on the annular bracket 100. A membrane bubble passage through which the membrane bubble 300 passes is formed inside the horizontal adjustment components. It also includes an outer cylinder frame 400 and a vertical adjustment mechanism 500; The outer cylinder frame is concentrically sleeved with the annular bracket, and the outer cylinder frame and the annular bracket are connected by an axial adjustment pair 600; The vertical adjustment mechanism 500 is used to drive the annular bracket to reciprocate along the axis direction of the outer cylinder frame.

[0025] In the above technical solution, the highly adaptive bubble stabilization frame, based on the traditional annular frame and horizontal adjustment assembly, adds an outer cylinder frame and a vertical adjustment mechanism. The outer cylinder frame is concentrically mounted on the annular frame and connected by an axial adjustment pair. The vertical adjustment mechanism drives the annular frame to reciprocate along the axis of the outer cylinder frame. This allows the bubble stabilization frame to be adjusted vertically, responding to vertical deformation of the film bubble. This solves the problem of traditional fixed bubble stabilization frames with inability to adjust their height, which can lead to misaligned cooling line positions. This helps ensure uniform film thickness and improve product quality.

[0026] Specifically, there are multiple axial adjustment pairs, which are evenly distributed axially between the outer cylinder frame and the annular bracket; The axial adjustment pair includes a first bearing seat 601 provided at both ends of the outer cylinder frame, a first screw rod 602 whose ends are rotatably matched with the first bearing seat 601, and a first screw sleeve 603 provided on the annular bracket, wherein the first screw rod is screwed to the first screw sleeve.

[0027] In this embodiment, multiple axial adjustment pairs are spaced evenly and axially between the outer cylinder frame and the annular support. Each axial adjustment pair consists of a first bearing seat, a first screw, and a first sleeve. The first screw is threadedly connected to the first sleeve, and both ends of the first screw rotate in engagement with the first bearing seat. The multiple axial adjustment pairs work together to ensure smoother and more reliable movement of the annular support along the axis of the outer cylinder frame, enhancing the stability and precision of vertical adjustment and ensuring that the bubble stabilization frame can accurately adapt to the vertical deformation of the film bubble.

[0028] Specifically, the vertical adjustment mechanism includes a first rotary drive member 501, a first input gear 502, a first linkage gear ring 503 and multiple first linkage gears 504. The first input gear is fixed on the first screw of one of the axial adjustment pairs, and the first linkage gear is connected to the first screw of the axial adjustment pair. The first driving gear 505 is connected to the output end of the first rotary drive member. The first driving gear 505 is driven and connected to the first input gear through a transmission chain 506, and the first linkage gear ring is driven and connected to multiple first linkage gears.

[0029] In this embodiment, the vertical adjustment mechanism uses a first rotating drive member to drive a first driving gear, which in turn drives a first input gear via a transmission chain, thereby driving the first screw of one of the axial adjustment pairs. Simultaneously, a first linkage gear ring is driven and connected to multiple first linkage gears, achieving synchronous rotation of the first screws of multiple axial adjustment pairs. The first screw performs multiple functions, including adjustment, guidance, retention, and driving.

[0030] After adopting the above structure, a single rotating drive component (such as a motor) can realize the synchronous drive of multiple axial adjustment pairs, ensuring that the annular bracket rises synchronously and smoothly when moving in the vertical direction, avoiding tilting, further improving the accuracy and stability of vertical adjustment, and enabling the bubble stabilizing frame to respond to membrane bubble changes more accurately.

[0031] Specifically, it also includes a motor base. The first rotating drive component is fixed to the upper end of the outer cylinder frame through the motor base 507. A position-adjustable tension adjustment gear 508 is provided on the outer cylinder frame on one side of the transmission chain. The tension adjustment gear 508 is meshed with the transmission chain.

[0032] In this embodiment, the first rotary drive member is fixed to the upper end of the outer cylinder frame. An adjustable tension adjustment gear is positioned on one side of the transmission chain and meshes with the transmission chain. Adjusting the tension adjustment gear position adjusts the tension of the transmission chain, ensuring that the transmission chain is always properly tensioned, reducing slippage and wear during transmission, improving transmission efficiency and reliability, and ensuring stable operation of the vertical adjustment mechanism.

[0033] Specifically, the horizontal adjustment assembly includes a second rotating drive member 201 fixed on the annular bracket, a second driving gear 202, a second linkage gear ring 203 and multiple adjustment mechanisms 204. The output end of the second rotating drive member is connected to the second driving gear, and the second linkage gear ring is driven and connected to the second driving gear and the second linkage gear of the adjustment mechanism, and is used to synchronously drive multiple adjustment mechanisms to perform synchronous opening and closing adjustments.

[0034] In this embodiment, the second rotary driving member drives the second driving gear to rotate, and the second linkage gear ring transmits power to the adjustment mechanism, thereby achieving synchronous opening and closing adjustment of multiple adjustment mechanisms. A single rotary drive can synchronously drive multiple adjustment mechanisms, making the horizontal adjustment more coordinated. It can quickly adapt to the horizontal size changes of the membrane bubble, ensure that the membrane bubble channel matches the membrane bubble shape, and enhance the bubble stabilization effect.

[0035] Specifically, it also includes a slide rail slider, and the adjustment mechanism includes a second screw 205, a second bearing seat 206, an upper support plate 207, a lower support plate 208, a connecting plate 217, a first hinge plate 209, a second hinge plate 210, a bubble stabilizing plate 211 and a bubble stabilizing group. One end of the upper support plate 207 is fixed to the upper end of the annular bracket, and the other end is rotatably connected to the upper end of the second hinge plate. One end of the connecting plate 217 is fixed to the bubble stabilizing plate, and the other end is rotatably connected to the first hinge plate. One end of the lower support plate 208 is rotatably connected to the lower end of the first hinge plate, and a screw hole 212 is provided on the other end. The second bearing seats are respectively fixed to the upper and lower sides of the annular bracket, and both ends of the second screw are rotatably connected to the second bearing seats, and the second screw is screwed to the screw hole. The lower end of the second hinge plate is slidably mated with the lower end of the bubble stabilizing plate through a slide rail and slider 213; The middle parts of the first hinge plate and the second hinge plate are cross - arranged and are rotationally connected through a pin shaft 214; The second linkage gear is fixedly connected to the upper end of the second screw rod, and the second linkage ring is meshed with and drives the second driving gear and the second linkage gear.

[0036] In this embodiment, when the second screw rod rotates, it drives the lower support plate to move. Through the cross - hinged structure of the first hinge plate and the second hinge plate, the bubble stabilizing plate realizes opening and closing adjustment. At the same time, the second linkage gear is fixedly connected to the upper end of the second screw rod, and the second linkage ring drives the second linkage gear to rotate. This makes the opening and closing adjustment of the adjustment mechanism more accurate and stable, can flexibly adjust the size of the film bubble channel, meet the requirements of film bubbles of different sizes, and further improve the constraint effect of the bubble stabilizing frame on the film bubble.

[0037] Specifically, the bubble stabilizing group includes a "C" - shaped frame 215 fixed on the bubble stabilizing plate and a roller shaft 216 rotationally connected inside the "C" - shaped frame.

[0038] In this embodiment, the bubble stabilizing group is composed of a "C" - shaped frame and a roller shaft rotationally connected inside it. The roller shaft can rotate with the movement of the film bubble. When the roller shaft contacts the film bubble, it is a rolling friction, reducing the frictional damage to the surface of the film bubble, protecting the shape of the film bubble, and at the same time being able to better fit the film bubble, enhancing the bubble stabilizing effect and ensuring the stable rise of the film bubble.

[0039] Specifically, it further includes a first intermediate gear and a second intermediate gear. The first intermediate gear is arranged on the outer cylinder frame between the first linkage gear and the first linkage gear, and the second intermediate gear is rotationally connected to the first screw sleeve.

[0040] In this embodiment, the first intermediate gear and the second intermediate gear play a role in transmission transition, optimizing the transmission relationship between the gears, making the power transmission more stable and efficient, reducing the impact and noise during the transmission process, and improving the service life of the mechanism.

[0041] Specifically, it further includes a laser rangefinder 900, a film bubble detection device 910 and a controller. The position sensor is fixed on the annular bracket for real - time detecting the distance L from the air ring mouth to the surface of the film bubble; the film bubble detection device is arranged on the annular bracket for detecting the diameter D of the film bubble; The controller is configured to execute: Generate a first adjustment signal according to the distance L, and drive the vertical adjustment mechanism to lift the annular bracket to the target height H, where H = f(L); Generate a second adjustment signal according to the film bubble diameter D, and drive the horizontal adjustment component to synchronously adjust the radial spacing of the film bubble channel, where the spacing R = g(D).

[0042] In this embodiment, a laser rangefinder measures the distance from the air ring opening to the film bubble surface, while a bubble detection device detects the bubble diameter. A controller generates adjustment signals based on the distance and diameter, respectively, to activate the vertical adjustment mechanism and horizontal adjustment assembly. This enables automated adjustment of the bubble stabilization frame height and the radial spacing of the bubble channels, responding to changes in the film bubble in real time and accurately without manual intervention, improving production efficiency and maintaining film quality.

[0043] The present application also embodies a method for adaptively adjusting the height of a bubble stabilizing rack, which is characterized by: The following steps are involved: (1) Position signal acquisition: The distance from the air ring opening to the film bubble surface is detected in real time by a laser rangefinder fixed at a preset distance above the air ring opening, wherein the preset distance is 1-2 meters, corresponding to the process position of the film bubble cooling line; (2) Altitude control calculation: The controller calculates the target altitude based on the collected distance signal, and establishes a functional mapping relationship between the target altitude and the distance signal; (3) Vertical positioning of the annular bracket: The vertical adjustment mechanism responds to the instructions of the controller and drives the annular bracket to rise and fall along the axis of the outer cylinder frame until the center of the annular bracket is aligned with the position of the film bubble cooling line.

[0044] In this method, a laser rangefinder first detects the distance to a specific location in real time. A controller then calculates the target height based on this distance. Finally, a vertical adjustment mechanism drives the ring bracket up and down to the target position. This provides a scientific and standardized method for adaptively adjusting the height of the bubble stabilization frame, ensuring that the center of the ring bracket is accurately aligned with the cooling line of the film bubble, effectively resolving the problem of cooling line misalignment, ensuring uniform film thickness, and improving product quality.

[0045] Technical personnel should note: Although the present invention has been described according to the above specific implementation methods, the concept of the present invention is not limited to this invention. Any modification using the concept of the present invention will be included in the scope of protection of this patent right.

Claims

1. A bubble stabilizing frame with highly adaptive adjustment, comprising an annular frame and a level adjustment assembly spaced apart on the annular frame, wherein a bubble channel is formed in the level adjustment assembly for the passage of a bubble, characterized in that: It also includes an outer cylinder frame and a vertical adjustment mechanism; The outer cylinder frame is concentrically sleeved with the annular bracket, and the outer cylinder frame and the annular bracket are connected by an axial adjustment pair; The vertical adjustment mechanism is used to drive the annular bracket to reciprocate along the axis direction of the outer cylinder frame.

2. The bubble stabilizing rack with self-adaptive height adjustment according to claim 1, characterized in that: There are multiple axial adjustment pairs, which are evenly distributed axially at intervals between the outer cylinder frame and the annular bracket; The axial adjustment pair includes first bearing seats arranged at both ends of the outer cylinder frame, first screws rotatably fitted with the first bearing seats at both ends, and first screw sleeves arranged on the annular bracket, and the first screws are screwed with the first screw sleeves.

3. The bubble stabilizing rack with self-adaptive height adjustment according to claim 2, characterized in that: The vertical adjustment mechanism includes a first rotary drive member, a first input gear, a first linkage ring and multiple first linkage gears. The first input gear is fixed on the first screw of one of the axial adjustment pairs. The first linkage gear is connected to the first screw of the axial adjustment pair. A first driving gear is connected to the output end of the first rotary drive member. The first driving gear and the first input gear are driven and connected by a transmission chain. The first linkage ring is drivingly connected to multiple first linkage gears.

4. The bubble stabilizing rack with self-adaptive height adjustment according to claim 3, characterized in that: It also includes a motor base. The first rotary drive member is fixed to the upper end of the outer cylinder frame through the motor base. An adjustable tension adjustment gear is arranged on the outer cylinder frame on one side of the transmission chain, and the tension adjustment gear is meshingly connected to the transmission chain.

5. The bubble stabilizing rack with self-adaptive height adjustment according to claim 3 or 4, characterized in that: The horizontal adjustment component includes a second rotary drive member, a second driving gear, a second linkage ring and multiple adjustment mechanisms fixed on the annular bracket. The output end of the second rotary drive member is connected to the second driving gear. The second linkage ring is drivingly connected to the second driving gear and the second linkage gears of the adjustment mechanisms for synchronously driving multiple adjustment mechanisms to perform synchronous opening and closing adjustments.

6. The bubble stabilizing rack with self-adaptive height adjustment according to claim 5, characterized in that: It also includes a slide rail and slider. The adjustment mechanism includes a second screw, a second bearing seat, an upper support plate, a lower support plate, a connecting plate, a first hinge plate, a second hinge plate, a bubble stabilizing plate and a bubble stabilizing group. One end of the upper support plate is fixed to the upper end of the annular bracket, and the other end is rotatably connected to the upper end of the second hinge plate. One end of the connecting plate is fixedly connected to the bubble stabilizing plate, and the other end is rotatably connected to the first hinge plate. One end of the lower support plate is rotatably connected to the lower end of the first hinge plate, and a screw hole is arranged at the other end. The second bearing seats are respectively fixed on the upper and lower sides of the annular bracket. Both ends of the second screw are rotatably connected to the second bearing seats, and the second screw is screwed with the screw hole; The lower end of the second hinge plate is slidably fitted with the lower end of the bubble stabilizing plate through the slide rail and slider; The middle parts of the first hinge plate and the second hinge plate are cross - arranged and rotatably connected by a pin shaft; The second linkage gear is fixedly connected to the upper end of the second screw, and the second linkage ring meshes and transmits with the second driving gear and the second linkage gear.

7. The bubble stabilizing rack with self-adaptive height adjustment according to claim 6, characterized in that: The bubble stabilizing group includes a "C" - shaped frame fixed on the bubble stabilizing plate and a roller shaft rotatably connected inside the "C" - shaped frame.

8. The bubble stabilizing rack with self-adaptive height adjustment according to claim 6, characterized in that: It also includes a first intermediate gear and a second intermediate gear. The first intermediate gear is arranged on the outer cylinder frame between the first linkage gears. The second intermediate gear is rotatably connected to the first screw sleeve.

9. The bubble stabilizing rack with self-adaptive height adjustment according to claim 6, characterized in that: It also includes a laser rangefinder, a film bubble detection device and a controller. The position sensor is fixed on the annular bracket and is used to detect the distance L from the air ring port to the film bubble surface in real time. The film bubble detection device is set on the annular bracket and is used to detect the diameter D of the film bubble. The controller is configured to perform: Generate a first adjustment signal based on the distance L to drive the vertical adjustment mechanism to raise or lower the annular bracket to a target height H, where H = f(L); A second adjustment signal is generated according to the bubble diameter D to drive the horizontal adjustment component to synchronously adjust the radial spacing of the bubble channel, where the spacing R = g(D).

10. A method for adaptively adjusting the height of a bubble stabilizing rack, characterized by: The following steps are involved: (1) Position signal acquisition: The distance from the air ring opening to the film bubble surface is detected in real time by a laser rangefinder fixed at a preset distance above the air ring opening, wherein the preset distance is 1-2 meters, corresponding to the process position of the film bubble cooling line; (2) Altitude control calculation: The controller calculates the target altitude based on the collected distance signal, and establishes a functional mapping relationship between the target altitude and the distance signal; (3) Vertical positioning of the annular bracket: The vertical adjustment mechanism responds to the instructions of the controller and drives the annular bracket to rise and fall along the axis of the outer cylinder frame until the center of the annular bracket is aligned with the position of the film bubble cooling line.

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