Inflatable locking structure

Abstract

The utility model discloses an inflatable locking structure. The inflatable locking structure comprises a locking fastener and a driving rod which reciprocates between a clamping seat and a base, the driving rod is positioned on one side of the locking fastener and is driven by gas; the base is provided with a locking hook which is fixed with the locking fastener in a hanging manner; the locking hook can be pushed by the driving rod to move towards the direction of the locking fastener and extend into the locking buckle to tighten the locking fastener; compared with a traditional locking mode, the air inflation driving design is utilized in the scheme, locking can be completed through simple air inflation action, and operation is easy and efficient; the tail end of the locking hook is embedded into the locking fastener and fixed under the pushing action of the driving rod, and the locking hook, the locking fastener and the locking hook form mechanical locking, so that the connecting part is prevented from loosening due to external force or vibration; the problem of material deformation and loosening caused by vibration, external impact or long-time use, temperature difference and the like in daily transportation or use is avoided; and the connecting stability, the anti-vibration performance and the safety of wind turbine component assembling operation are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ocean engineering equipment, especially to an inflatable locking structure. BACKGROUND

[0002] As a clean and renewable energy, offshore wind power has gradually become an important part of the global energy structure due to its high energy density and stable wind resources. With the growing demand of the wind power market, the development of offshore wind power is expanding from shallow sea to deeper sea areas, and the single machine capacity is also increasing, leading to the increasing size of wind turbine blades. The hoisting operation of wind turbine blades becomes a crucial part of the installation process. In order to adapt to this development trend, the design and installation technology of offshore wind turbines need continuous innovation, especially in the transportation and hoisting of large wind turbine blades. It is urgent to solve the problems of efficient installation and reliability of hoisting operation.

[0003] The existing wind turbine blade hoisting technology often faces complex offshore environments in high-altitude operations, such as variable wind speed and sea wave surging, which not only increases the hoisting difficulty but also puts higher requirements on the precision and reliability of hoisting equipment. The installation of wind turbine blades usually requires the use of multiple specific tools, involving the docking, adjustment, and fixing steps of multiple components and bolts and nuts. The Chinese invention patent with publication number CN115215192A discloses an integrated device technology solution to solve the problem of the need for multiple specific tools for blade storage and assembly.

[0004] However, the assembly of the integrated device still needs to go through multiple steps, and the assembly operation is complicated. For example, the assembly of the upper and lower parts of the rotating drum and the profile plate and other components requires multiple docking, adjustment, and bolt and nut tightening steps, and multiple fasteners are needed, making the assembly complicated and difficult to adapt to the unfavorable assembly conditions of high wind speed and equipment shaking on the sea. It is easy to cause the bolts to be unable to be tightened or the assembly to be not firm due to misalignment, which may further cause hidden dangers. Moreover, the assembled equipment is prone to mechanical loosening due to external factors such as vibration during transportation or hoisting, which inevitably affects the stability and safety of the blade hoisting operation.

[0005] Therefore, further research and development are needed to solve the problems existing in the above-mentioned prior art. UTILITY MODEL CONTENT

[0006] Therefore, in order to solve the problems existing in the above-mentioned prior art, the purpose of the utility model is to provide an inflatable locking structure.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0008] An inflatable locking structure is applied to a clamping device for assembling offshore wind turbine components, the clamping device comprising a base and a clamping seat mounted on the base; the inflatable locking structure is used to lock the clamping seat and the base;

[0009] The inflatable locking structure comprises a flexible locking buckle arranged on the clamping seat and a driving rod reciprocally moving between the clamping seat and the base; the driving rod is located on one side of the locking buckle and is driven by gas; the base is provided with a locking hook fixedly hung with the locking buckle; or, the locking buckle and the driving rod are arranged on the base; the clamping seat is provided with the locking hook;

[0010] The locking hook can move towards the locking buckle under the pushing action of the driving rod and extend into the locking buckle to tighten the locking buckle.

[0011] Further, the locking hook can be rotatably or movably arranged on the base, and the end of the locking buckle extends to the base and is spaced apart from the locking hook; the locking hook is provided with a limiting portion on the side close to the driving rod, and the end of the driving rod is in pushing contact with the limiting portion to drive the locking hook to rotate or move towards the locking buckle and extend into the locking buckle to tighten the locking buckle.

[0012] Further, the base is recessed with a limiting groove capable of accommodating the locking hook, and the end of the locking buckle extends into the limiting groove and is spaced apart from the locking hook; the limiting groove is provided with a stop portion, and the end of the locking hook can pass through the locking buckle and abut on the stop portion to be limited, so as to tighten the locking buckle.

[0013] Further, two locking buckles are spaced apart on the clamping seat, and the driving rod is movably arranged between the two locking buckles; two locking hooks are rotatably or movably arranged in the limiting groove, and the end of the driving rod is provided with a pushing limiting block for driving the two locking hooks to rotate or move in the direction away from each other to extend into the locking buckle; the pushing limiting block is provided with a limiting inclined surface inclined towards the base on both sides of the pushing limiting block, and the limiting portions of the two locking hooks are in pushing contact with the limiting inclined surfaces on both sides of the pushing limiting block.

[0014] Further, the locking hook comprises a hinged end and a locking end, and the limiting portion is formed between the hinged end and the locking end and protrudes towards the pushing limiting block; the two locking hooks are rotatably spaced apart in the limiting groove through the hinged ends and the rotating shafts, the two limiting portions are respectively in sliding contact with the limiting inclined surfaces on both sides of the pushing limiting block, and under the pushing action of the pushing limiting block, the two locking hooks are rotated in the direction away from each other to abut on the stop portion after the locking end passes through the locking buckle.

[0015] Further, the two side walls of the limiting groove are respectively provided with the stop portion in V-shaped recess; the stop portion is provided with a first guide slope along the rotating direction of the locking hook, the locking end is provided with a second guide slope in sliding cooperation with the first guide slope; the limiting portion is provided with a third guide slope in cooperation with the limiting slope.

[0016] Further, the sealing air cavity is provided with an air inlet channel, air is filled into the sealing air cavity through the air inlet channel to push the limiting table to move in the sealing air cavity towards the base, thereby driving the driving rod to move.

[0017] Further, the guiding seat corresponding to the sealing air cavity is arranged on the clamping seat, the guiding seat is internally provided with a guiding hole matched with the driving rod, and the driving rod can reciprocatingly move along the guiding hole; one end of the guiding seat close to the sealing air cavity extends into the sealing air cavity and is fixed.

[0018] Further, the limiting table is peripherally embedded with a first annular sealing ring, and the outer periphery of the first annular sealing ring is in sliding abutment with the inner wall of the sealing air cavity; one end of the guiding seat close to and extending into the sealing air cavity is peripherally embedded with a second annular sealing ring, and the second annular sealing ring is in interference abutment with the inner wall of the sealing air cavity.

[0019] Further, the guiding hole is peripherally embedded with a third annular sealing ring, and the third annular sealing ring is in sliding sleeve connection with the driving rod; the end portion of the guiding seat away from the sealing air cavity is provided with a bump stop washer, and the inner hole of the bump stop washer is in sliding sleeve connection with the driving rod.

[0020] Compared with the prior art, the utility model has the beneficial effects at least in the following aspects:

[0021] 1) The utility model is applied to offshore wind turbine component assembly operation, compared with the traditional bolt nut locking mode, the scheme utilizes the air drive design, and locking can be completed through simple air operation, and the operation is simple and efficient; under the pushing action of the driving rod, the locking hook is embedded into the locking fastener and is fixed, and the three form mechanical locking, so that the connection part is prevented from loosening due to external force or vibration; the problem that the bolt nut locking mode is loosened due to vibration, external impact or long-time use and temperature difference and the like in the daily transportation or use of the clamping equipment is avoided; the connection stability and the anti-vibration performance are greatly improved, and the safety of the wind turbine component assembly operation is improved.

[0022] 2)The utility model discloses locking structure assembly fault tolerance is high: locking hook and locking fastener pass through the guiding design of push limit block, realize the alignment and locking process of automation, reduce the tedious operation of manual intervention such as multiple alignment, adjustment, greatly improve the assembly efficiency of base and clamping seat;

[0023] Further, the utility model can automatically adapt to tolerance change, improve assembly fault tolerance: the connection design of locking hook and locking fastener can automatically correct the slight deviation during assembly through self-adaptive sliding by push limit block and limit inclined plane, reduce assembly precision requirement, need not strict calibration to locking hook, locking fastener and drive rod can ensure locking reliability, greatly reduce the installation complexity, especially suitable for the quick assembly of complex working conditions such as strong wind resistance, platform swing when assembling at sea, reduce the human error of operating personnel.

[0024] 3)The utility model discloses inflatable locking structure has four layer seal insurance, and safety performance is higher;The first sealing ring that limit platform periphery is provided with, satisfies sealing effect, and also reduces the hard friction of limit platform and sealed inflatable cavity;Second, the one end of guide seat that stretches into sealed inflatable cavity is provided with the second sealing ring, and sealed inflatable cavity is further sealed through interference fit, especially when drive rod passes through guide seat, prevents the gas leakage caused by slight gap;And the third sealing ring is embedded in the inner wall of guide hole, and drive rod is in reciprocating movement, because the sealing ring of this place slides and fits, further reduces the gas leakage risk;The anti-collision washer between the outermost end of guide seat and push limit block provides the buffer protection between push limit block and guide seat, also prevents the displacement of sealing ring due to the high frequency movement of drive rod;Multi-layer sealing protection ensures that the whole locking device is still reliable in high pressure, high humidity or corrosive environment. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the partial structure schematic drawing of the clamping equipment of the inflatable locking structure of the preferred embodiment of the utility model;

[0026] Figure 2 It is the partial structure schematic drawing of the clamping equipment of the inflatable locking structure of the preferred embodiment of the utility model; Figure 1 It is the partial structure enlarged schematic drawing of the place A;

[0027] Figure 3 It is the partial structure exploded schematic drawing of the clamping equipment of the inflatable locking structure of the preferred embodiment of the utility model;

[0028] Figure 4 It is the partial structure enlarged schematic drawing of the place B; Figure 3

[0029] Figure 5 It is the whole structure reference schematic drawing of the clamping equipment of the inflatable locking structure of the preferred embodiment of the utility model.

[0030] In the drawing: ​

[0031] 1, locking buckle; 2, drive rod; 21, limiting table; 3, locking hook; 31, limiting part; 311, third guide slope; 32, hinged end; 33, locking end; 331, second guide slope; 4, push limiting block; 41, limiting slope; 5, guide seat; 51, guide hole; 6, first sealing ring; 7, second sealing ring; 8, third sealing ring; 9, anti-collision washer; 10, base; 101, limiting groove; 102, stop; 103, first guide slope; 20, clamping seat; 201, sealed air-filled cavity; 2011, air inlet channel. DETAILED DESCRIPTION

[0032] In order to facilitate the understanding of the present application, the technical solutions and advantages of the present application are further described in detail below in combination with the drawings and examples. The specific structure and characteristics of the present application are described below by way of example, which should not constitute any limitation on the present application. At the same time, any one of the technical features mentioned below (including implied or disclosed) and any one of the technical features directly shown or implied in the drawings can be further combined or deleted between these technical features, thereby forming more other embodiments that can not be directly or indirectly mentioned in the present application. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein.

[0033] In the description of the present application, unless otherwise stated, the components used are conventional components in the prior art.

[0034] As Figures 1-4 As shown in the drawings, the present application provides an inflatable locking structure, which is applied to a clamping device for assembly operation of offshore wind turbine components, the clamping device comprising a base 10 and a clamping seat 20 mounted on the base 10; the inflatable locking structure is used to lock the clamping seat 20 and the base 10; in this embodiment, the offshore wind turbine component assembly operation includes but is not limited to clamping and fixing or hoisting operation of components such as wind turbine tower, wind turbine blade, wind turbine cabin, etc. The clamping device refers to a device used to fix the assembly target component during clamping and fixing or hoisting of the above components. The present application takes wind turbine blade clamping and fixing or hoisting as an example for description.

[0035] Further description of the inflatable locking structure of this application: The inflatable locking structure includes a flexible locking fastener 1 disposed on the clamping seat 20 and a drive rod 2 that reciprocates between the clamping seat 20 and the base 10; the drive rod 2 is located on one side of the locking fastener 1 and is driven by gas; the base 10 is provided with a locking hook 3 that is hooked and fixed to the locking fastener 1; or, the locking fastener 1 and the drive rod 2 are disposed on the base 10; the clamping seat 20 is provided with the locking hook 3;

[0036] The locking hook 3, under the pushing action of the drive rod 2, moves towards the locking fastener 1 and extends into the locking fastener 1 to tighten it. In this embodiment, the locking fastener is a fastener with a lug or hole structure connected to the locking hook. In this embodiment, it can be a strip-shaped locking fastener, generally rectangular in shape. In other optional embodiments, the locking fastener can be provided with a snap-fit ​​or other structure to cooperate with the locking hook. The locking hook can simply be provided with a hook-shaped structure that cooperates with the locking fastener for positioning.

[0037] In this embodiment, the flexible locking fastener can be a locking band with moderate hardness, rigidity and deformation recovery ability, and the locking method is to lift and lock the ear part by locking hook.

[0038] This solution utilizes gas to drive the drive rod, and locking can be completed with a simple inflation action, making it simple and efficient to operate. The locking hook, under the pushing action of the drive rod, embeds the locking fastener at its end and secures it, forming a mechanical lock that prevents the connection from loosening due to external force or vibration. It also avoids the problem of loosening caused by vibration, external impact, prolonged use, or temperature differences during the daily transportation or use of clamping equipment, which is often the case with bolts and nuts. This significantly improves connection stability and vibration resistance, eliminates the possibility of loosening, and enhances the safety of pneumatic component assembly operations.

[0039] like Figure 2 As shown, specifically, the locking hook 3 is rotatably or movable on the base 10, and the end of the locking fastener 1 extends onto the base 10, spaced apart from the locking hook 3. The locking hook 3 has a limiting part 31 near the drive rod 2. The end of the drive rod 2 pushes against the limiting part 31, causing the locking hook 3 to rotate or move towards the locking fastener 1 and extend into it to tighten the locking fastener 1. In this embodiment, the limiting part provides a locking force point. The drive rod pushes the locking hook to rotate or move through the limiting part to tighten the locking fastener. The direction of movement of the locking hook can be consistent with the drive rod, tightening the locking fastener under the push of the drive rod. Alternatively, it can be hinged, with the thrust of the drive rod acting on the limiting part to push the locking hook to rotate and tighten the locking fastener.

[0040] Optionally, the base 10 is concave and has a limiting groove 101 for accommodating the locking hook 3, and the end of the locking fastener 1 extends into the limiting groove 101 and is opposite to the locking hook 3; the locking fastener extends into the limiting groove and is opposite to the locking hook, facilitating the movement or rotation of the locking hook into the locking fastener to complete the locking. The limiting groove 101 is provided with a stop portion 102, and the end of the locking hook 3 can pass through the locking fastener 1 and abut against the stop portion 102 to be limited, so as to tighten the locking fastener 1. In the embodiment, the stop portion can be a protruding structure on the inner wall of the limiting groove, or a matching accommodation structure of the locking hook.

[0041] As shown in Figure 2 , Figure 4 Preferably, two locking fasteners 1 are spaced apart on the clamping seat 20, and the driving rod 2 is movably arranged between the two locking fasteners 1; two locking hooks 3 are rotatably or movably arranged in the limiting groove 101, and the end of the driving rod 2 is provided with a push limiting block 4 for driving the two locking hooks 3 to rotate or move away from each other to extend into the locking fastener 1; the two sides of the push limiting block 4 are respectively in push contact with the limiting portions 31 of the locking hooks 3, and are respectively provided with limiting inclined surfaces 41 inclined toward the base 10.

[0042] In the embodiment, two locking hooks are arranged, and the push limiting block with a trapezoidal structure is used to cooperate with the trapezoidal inclined surface through the push action, so that the two locking hooks are forced to rotate away from each other and clamped into the locking fastener to complete the locking operation.

[0043] Further refinement, the locking hook 3 includes a hinged end 32 and a locking end 33, and the hinged end 32 and the locking end 33 are protruded toward the push limiting block 4 to form the limiting portion 31; the two locking hooks 3 are rotatably spaced apart in the limiting groove 101 through the hinged end 32 through the rotating shaft, the two limiting portions 31 are respectively in sliding cooperation with the limiting inclined surfaces 41 on the two sides of the push limiting block 4, and under the push action of the push limiting block 4, the two locking hooks 3 are rotated away from each other to abut against the stop portion 102 after the locking end 33 passes through the locking fastener 1. In the embodiment, the locking hook is arranged in an L shape, and is abutted against the stop portion after rotating through the locking fastener under the extrusion action of the trapezoidal push limiting block.

[0044] Specifically, the two side walls of the limiting groove 101 are respectively provided with the stop portion 102 in a V-shaped recess; the stop portion 102 is provided with a first guide slope 103 along the rotating direction of the locking hook 3, the locking end 33 is provided with a second guide slope 331 which is in sliding fit with the first guide slope 103; the limiting portion 31 is provided with a third guide slope 311 which is in fit with the limiting slope 41. Such design can reduce the setting of additional components, and the stop portion can be directly recessed on the inner wall of the limiting groove, and the V-shaped design provides a self-locking effect, so that the locking hook cannot slide out of the locking fastener even in a stressed state, thereby ensuring long-term stability of the connection.

[0045] The inflation mode of the utility model is further described as shown in the figure, Figure 2 The sealing inflation cavity 201 is provided with an air inlet channel 2011, air is filled into the sealing inflation cavity 201 through the air inlet channel 2011, so as to drive the limiting table 21 to move in the sealing inflation cavity 201 towards the base 10, thereby driving the driving rod 2 to move.

[0046] Optionally, the clamping seat 20 is provided with a guide seat 5 corresponding to the sealing inflation cavity 201, the guide seat 5 is internally provided with a guide hole 51 which is adapted to the driving rod 2, and the driving rod 2 can reciprocate along the guide hole 51; one end of the guide seat 5 close to the sealing inflation cavity 201 extends into the sealing inflation cavity 201 and is fixed. The design of the guide seat and the guide hole can effectively improve the stability of the movement of the driving rod, ensure that it does not deviate or tilt during reciprocating movement, and reduce component wear.

[0047] In order to ensure the air tightness of the inflation driving mode, preferably, the limiting table 21 is embedded with a ring-shaped first sealing ring 6 around the periphery, the periphery of the first sealing ring 6 is in sliding abutment with the inner wall of the sealing inflation cavity 201; one end of the guide seat 5 close to and extending into the sealing inflation cavity 201 is embedded with a ring-shaped second sealing ring 7 around the periphery, and the second sealing ring 7 is in interference abutment with the inner wall of the sealing inflation cavity 201.

[0048] Furthermore, the hole wall of the guide hole 51 is embedded with a ring-shaped third sealing ring 8, the third sealing ring 8 is in sliding sleeve connection with the driving rod 2; the end portion of the guide seat 5 away from the sealing inflation cavity 201 is provided with a bump stop washer 9, and the inner hole of the bump stop washer 9 is in sliding sleeve connection with the driving rod 2.

[0049] Through the four-layer sealing insurance, the safety performance of the utility model is higher;The first sealing ring arranged on the outer periphery of the limiting table meets the sealing effect and reduces the hard friction between the limiting table and the sealing air filling cavity;Secondly, the second sealing ring is arranged on the end of the guide seat extending into the sealing air filling cavity, and the air filling cavity is further sealed through interference fit, especially when the driving rod passes through the guide seat, the gas leakage caused by the small gap is prevented;The third sealing ring is embedded in the inner wall of the guide hole, and the driving rod is further reduced in the reciprocating movement due to the sliding fit of the sealing ring at this position, thereby reducing the risk of gas leakage;The anti-collision washer between the outermost end of the guide seat and the push limiting block not only provides buffer protection between the push limiting block and the guide seat, but also prevents the displacement of the sealing ring caused by the high-frequency movement of the driving rod;Multi-layer sealing protection ensures that the entire locking device is still reliable in high-pressure, high-humidity or corrosive environment.

[0050] It should be noted that the base of the clamping device is generally used to connect with the crane and the like through a lifting tool, and the clamping seat is generally used to be installed in the inner cavity of the base, as shown in Figure 5 It should be noted that the base of the clamping device is generally used to connect with the crane and the like through a lifting tool, and the clamping seat is generally used to be installed in the inner cavity of the base, as shown in

[0051] The above-mentioned embodiments are only preferred embodiments of the utility model, and cannot be used to limit the scope of protection of the utility model. For ordinary skilled persons in the art, it can be understood that the embodiments can be changed, modified, replaced and modified in various ways without departing from the principles and spirits of the utility model, and the scope of the utility model is limited by the appended claims and their equivalents.

Claims

1. An inflatable locking structure applied to a clamping device for assembly of a component of an offshore wind turbine, the clamping device comprising a base and a clamping seat mounted on the base; the inflatable locking structure is used to lock the clamping seat and the base; comprising a flexible locking buckle arranged on the clamping seat and a driving rod reciprocally moving between the clamping seat and the base; the driving rod is located on one side of the locking buckle and is driven by gas; the base is provided with a locking hook fixedly hung with the locking buckle; or, the locking buckle and the driving rod are arranged on the base; the clamping seat is provided with the locking hook; the locking hook can move towards the locking buckle under the pushing action of the driving rod and extend into the locking buckle to tighten the locking buckle. characterized in that 2. The locking hook is rotatably or movably arranged on the base, the end of the locking buckle extends to the base and is spaced apart from the locking hook; the side of the locking hook close to the driving rod is provided with a limiting portion, the end of the driving rod is in pushing contact with the limiting portion to drive the locking hook to rotate or move towards the locking buckle and extend into the locking buckle to tighten the locking buckle.

3. The base is concave and provided with a limiting groove capable of accommodating the locking hook, the end of the locking buckle extends into the limiting groove and is spaced apart from the locking hook; the limiting groove is provided with a stop portion, the end of the locking hook can pass through the locking buckle and abut on the stop portion to be limited, so as to tighten the locking buckle.

2. The inflatable locking structure of claim 1, wherein 4. The clamping seat is spaced apart and provided with two locking buckles, the driving rod is movably arranged between the two locking buckles; the limiting groove is rotatably or movably provided with two locking hooks, the end of the driving rod is provided with a pushing limiting block for driving the two locking hooks to rotate or move in a direction away from each other to extend into the locking buckle; the pushing limiting block is provided with a limiting inclined surface inclined towards the base on both sides of the pushing limiting block.

3. The inflatable locking structure of claim 2, wherein, 5. The locking hook comprises a hinged end and a locking end, the limiting portion is formed between the hinged end and the locking end and protrudes towards the pushing limiting block; the two locking hooks are rotatably spaced apart in the limiting groove through the hinged end through a rotating shaft, the two limiting portions are respectively slidably matched with the limiting inclined surfaces on both sides of the pushing limiting block, and under the pushing action of the pushing limiting block, the two locking hooks are rotated in a direction away from each other to abut on the stop portion after the locking end passes through the locking buckle.

4. The inflatable locking structure of claim 3, wherein 6. The limiting groove is provided with the stop portion on both sides of the sidewall in a V-shaped concave manner; the stop portion is provided with a first guide inclined surface along the rotating direction of the locking hook, the locking end is provided with a second guide inclined surface slidably matched with the first guide inclined surface; the limiting portion is provided with a third guide inclined surface matched with the limiting inclined surface.

5. The inflatable locking structure of claim 4, wherein, ​ 6. The inflatable locking structure of claim 5, wherein, ​ 7. An inflatable locking structure according to any one of claims 1-6, wherein, The clamping seat is provided with a sealed air-filled cavity for mounting the driving rod, and the end of the driving rod is provided with a limiting table matched with the air-filled cavity; the sealed air-filled cavity is provided with an air inlet channel, air is filled into the sealed air-filled cavity through the air inlet channel to push the limiting table to move in the sealed air-filled cavity towards the base, thereby driving the driving rod to move.

8. The inflatable locking structure of claim 7, wherein, The clamping seat is provided with a guide seat corresponding to the sealed air-filled cavity, the guide seat is internally provided with a guide hole matched with the driving rod, and the driving rod can reciprocate along the guide hole; the end of the guide seat close to the sealed air-filled cavity extends into the sealed air-filled cavity and is fixed.

9. The inflatable locking structure of claim 8, wherein, The limiting table is embedded with a ring-shaped first sealing ring on the outer periphery, and the outer periphery of the first sealing ring is in sliding abutment with the inner wall of the sealed air-filled cavity; the end of the guide seat close to and extending into the sealed air-filled cavity is embedded with a ring-shaped second sealing ring on the outer periphery, and the second sealing ring is in interference abutment with the inner wall of the sealed air-filled cavity.

10. The inflatable locking structure of claim 9, wherein, The hole wall of the guide hole is embedded with a ring-shaped third sealing ring, and the third sealing ring is in sliding sleeve connection with the driving rod; the end of the guide seat away from the sealed air-filled cavity is provided with a bump stop washer, and the inner hole of the bump stop washer is in sliding sleeve connection with the driving rod.

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