Air column welding structure, welding method and inflatable tent framework

Abstract

The invention discloses an air column welding structure, a welding method and an inflatable tent framework, the air column welding structure comprises a plurality of pipe bodies, the plurality of pipe bodies are butted together to form a multi-way pipe joint, a first welding area for hermetically connecting the adjacent pipe bodies is arranged at the butted part of the adjacent pipe bodies, a first reinforcing sheet is welded on the first welding area, and a second reinforcing sheet is welded on the second welding area. Center holes are formed in the top center and the bottom center of the multi-way pipe joint, and sealing pieces and second reinforcing pieces are welded to the inner sides and the outer sides of the peripheries of the center holes correspondingly. The method has the advantages that the manufacturing process can be optimized, the production efficiency is improved, the product quality is ensured, and the production cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of inflatable products, and in particular to an air column welding structure, a welding method and an inflatable tent frame. Background Art

[0002] The traditional manufacturing process of inflatable tents faces many challenges in actual production. First, due to the complex structure of the inflatable tent, especially the connection nodes of the air pipe, skilled technicians are usually required to complete the work manually. This manual operation not only places high demands on the workers' experience and technical level, but also leads to low production efficiency. In large-scale production, this manual-dependent method is difficult to ensure product consistency and standardization, thus limiting the promotion and application of automated production lines.

[0003] Secondly, traditional processes are prone to quality problems during the manufacturing process. For example, the welding or bonding parts of the air tube nodes may not be firm due to insufficient process control precision, which may lead to air leakage. In addition, during the overall molding process of the tent, due to uneven material tension distribution or limitations of the splicing process, the finished product often has problems such as structural distortion and deformation. This not only significantly reduces the aesthetics and practicality of the product, but may also affect its durability and safety performance.

[0004] Therefore, it is necessary to further improve and perfect the prior art to overcome these shortcomings, and the present invention is made based on this situation. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide an air column welding structure, a welding method and an inflatable tent frame which can optimize the manufacturing process, improve production efficiency, ensure product quality and reduce production costs.

[0006] The present invention can be achieved through the following technical solutions:

[0007] In order to solve the above technical problems, the present invention provides a gas column welding structure, including multiple tube bodies, which are butt-jointed together to form a multi-way pipe joint. The butt joint of adjacent tube bodies is provided with a first welding area for sealingly connecting the two, and a first reinforcement plate is welded on the first welding area. The top center and the bottom center of the multi-way pipe joint are both provided with a center hole, and a sealing plate and a second reinforcement plate are respectively welded on the inner and outer sides of the periphery of the center hole.

[0008] In order to further solve the technical problem to be solved by the present invention, the present invention provides a gas column welding structure, in which the tube body includes tube segments and is rolled from the tube segments, and the two long sides of the tube segments are provided with a second welding area for sealingly connecting the two.

[0009] In order to further solve the technical problem to be solved by the present invention, in a gas column welding structure provided by the present invention, two parallel arc-shaped connecting ports are punched at the butt ends of the pipe segments, and the first welding area is formed by welding the peripheries of the connecting ports of adjacent pipe bodies together.

[0010] In order to further solve the technical problem to be solved by the present invention, in a gas column welding structure provided by the present invention, arc-shaped notches are punched at the two corners and the middle of the butt ends of the pipe segments, and the corresponding notches of each pipe body are butt-jointed together to form the center hole.

[0011] In order to further solve the technical problem to be solved by the present invention, in a gas column welding structure provided by the present invention, the size of the sealing plate is larger than the size of the second reinforcement plate, the size of the second reinforcement plate is larger than the size of the center hole, and a third welding area is provided between the sealing plate, the second reinforcement plate and the periphery of the center hole.

[0012] The present invention can also be implemented by the following technical solutions:

[0013] A welding method for manufacturing a gas column welding structure as described above comprises the following steps:

[0014] S1. Take a pipe segment and punch a hole at one end of the pipe segment to punch out an arc-shaped connection port and a notch, wherein the connection port is arranged in parallel at the end of the pipe segment, and the notch is arranged at two corners of the end of the pipe segment and between the two connection ports;

[0015] S2, fold the segment in half along its length direction;

[0016] S3, stacking the folded tube segments in sequence, and aligning the connection ports and notches;

[0017] S4, welding the adjacent segments along the periphery of the corresponding connection ports, wherein the welding position is the first welding area;

[0018] S5, unfolding each pipe segment in sequence, taking a number of first reinforcement sheets, and welding the first reinforcement sheets to the corresponding first welding areas;

[0019] S6. Welding the two long sides of each pipe segment together to form a pipe body, wherein the welding position is the second welding area, and the whole is formed into a multi-way pipe joint, wherein the top center and the bottom center of the multi-way pipe joint form a center hole formed by the butt joint of each notch;

[0020] S7, take the sealing sheet and the second reinforcing sheet, place the sealing sheet on the inner side of the center hole, and the second reinforcing sheet on the outer side of the center hole, and weld the sealing sheet, the periphery of the center hole, and the second reinforcing sheet together, and the welding position is the third welding area;

[0021] The order of steps S1 and S2 can be interchanged.

[0022] The present invention can also be implemented by the following technical solutions:

[0023] In order to solve the above technical problems, the present invention provides an inflatable tent frame, including a plurality of top air columns, the upper ends of the top air columns are connected together by an air column welding structure according to the above-mentioned method, the lower ends of the top air columns are connected to supporting air columns, and the lower ends of the supporting air columns are provided with supporting foot sealing structures.

[0024] In order to further solve the technical problem to be solved by the present invention, in an inflatable tent frame provided by the present invention, the supporting foot sealing structure includes an outer flange arranged at the lower end of the supporting air column, and a sealing sheet and a bottom cover sheet are arranged in sequence below the outer flange. The outer flange, the periphery of the sealing sheet and the periphery of the bottom cover sheet are welded together to form a fourth welding area.

[0025] In order to further solve the technical problem to be solved by the present invention, in an inflatable tent frame provided by the present invention, a hard plate is sandwiched between the middle of the bottom cover sheet and the middle of the sealing sheet, and a fifth welding area surrounding the hard plate is provided between the bottom cover sheet and the sealing sheet.

[0026] In order to further solve the technical problem to be solved by the present invention, in an inflatable tent frame provided by the present invention, an inner pull tab is welded in the middle of the bottom cover sheet and the welding area is the sixth welding area, the outer circle of the inner pull tab is tightened upward and welded to the inner wall of the supporting air column and the welding area is the seventh welding area.

[0027] In order to further solve the technical problem to be solved by the present invention, in an inflatable tent frame provided by the present invention, a hard plate is sandwiched between the middle part of the bottom cover sheet and the middle part of the sealing sheet, and an inner pull tab is also provided above the middle part of the sealing sheet, and an eighth welding area surrounding the hard plate is provided between the middle part of the inner pull tab, the middle part of the sealing sheet and the middle part of the bottom cover sheet, and the outer circle of the inner pull tab is tightened upward and welded to the inner side wall of the supporting air column, and the welding area is the ninth welding area.

[0028] In order to further solve the technical problem to be solved by the present invention, in an inflatable tent frame provided by the present invention, the supporting foot sealing structure includes an inner turndown arranged at the lower end of the supporting air column, and a bottom cover sheet and a sealing sheet are arranged above the inner turndown in sequence, and the inner turndown, the periphery of the bottom cover sheet and the periphery of the sealing sheet are welded together to form a tenth welding area.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] 1. The gas column welding structure of the present invention aims at the problem of easy tearing and air leakage at the top center and bottom center of the multi-way pipe joint. A structure with a center hole is designed, and a third welding area is formed by double-sided welding of a sealing sheet on the inner side of the center hole and a reinforcing sheet on the outer side, thereby achieving a high-strength sealed connection. This design effectively disperses local stress, avoids tearing and falling off due to load concentration, and significantly improves the sealing performance and structural strength of the joint. At the same time, this optimized structure simplifies the manufacturing process, improves production efficiency, reduces the risk of air leakage, and enhances the reliability and service life of the product.

[0031] 2. The welding method of the present invention has simple steps and strong operability, avoiding the complex positioning and adjustment problems in traditional welding technology. In addition, the method adopts the method of folding in half and stacking in multiple layers, which significantly improves the efficiency of punching and welding. The welding process of the present invention has low requirements for processing accuracy and can significantly reduce production costs. At the same time, through reasonable structural design and material use, material savings are achieved. The formed gas column welding structure has excellent sealing performance and strength, can effectively avoid air leakage problems, and improve product reliability and service life.

[0032] 3. The present invention provides a variety of sealing structure designs for the support legs of the inflatable tent, which can adapt to different application scenarios and strength requirements. These designs not only improve the pressure resistance and durability of the bottom of the supporting air column, but also effectively solve the problem of structural deformation or tearing caused by air pressure fluctuations, providing a more reliable guarantee for the use of the inflatable tent. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0034] Figure 1 It is a three-dimensional structural schematic diagram of the gas column welding structure;

[0035] Figure 2 It is the expansion diagram of the pipe body (pipe segment);

[0036] Figure 3 It is a schematic diagram of the stacking relationship of multiple segments;

[0037] Figure 4 It is a schematic diagram of the forming process of the gas column welding structure;

[0038] Figure 5 It is a schematic diagram of the structure at the center hole;

[0039] Figure 6 It is a three-dimensional structural diagram of the inflatable tent frame;

[0040] Figure 7 This is the first embodiment of the supporting foot sealing structure;

[0041] Figure 8 This is a second embodiment of the supporting foot sealing structure;

[0042] Fig. 9 This is the third embodiment of the supporting foot sealing structure;

[0043] Fig.10 This is a fourth embodiment of the supporting foot sealing structure;

[0044] Fig.11 This is the fifth embodiment of the supporting foot sealing structure. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0046] like Figures 1 to 5 As shown, the present invention discloses an improved gas column welding structure, which is used to solve the problems of easy gas leakage, insufficient node strength, complex processing, etc. in the traditional gas column welding structure.

[0047] The structure includes a plurality of tube bodies 1, one ends of which are butt-jointed together to form a multi-way pipe joint for forming a supporting air column for an inflatable product such as an inflatable tent.

[0048] To ensure the sealing performance and welding strength, a first welding area 11 for sealingly connecting the two adjacent pipe bodies 1 is provided at the joint. To further improve the mechanical strength and durability of the welding part, a first reinforcing sheet 2 is welded on the first welding area 11, thereby effectively enhancing the tensile strength and torsional resistance of the joint area.

[0049] More importantly, in order to solve the problem of easy tearing and air leakage caused by weak structure at the top center and bottom center of conventional multi-way pipe joints, the present invention sets center holes 1a at the top center and bottom center of the multi-way pipe joint through innovative design. The design of the center hole 1a not only simplifies the distribution and connection structure of the airflow, but also enhances the sealing and mechanical strength of this part through optimized welding process.

[0050] Specifically, a sealing sheet 3 is welded on the inner side of the periphery of the central hole 1a, and a second reinforcing sheet 4 is welded on the outer side. This double-sided welded combined structure firmly seals the periphery of the central hole 1a by means of internal and external clamping. The size of the sealing sheet 3 is designed to be larger than the second reinforcing sheet 4, and the size of the second reinforcing sheet 4 is larger than the diameter of the central hole 1a. This size gradient distribution ensures that the welding area has a higher stress dispersion ability, avoiding tearing or failure of the welding point due to excessive local load.

[0051] In addition, the sealing sheet 3, the second reinforcing sheet 4 and the periphery of the central hole 1a are sealed and connected via the third welding area 15. This sealed connection firmly fuses the inner and outer materials, so that stress concentration can be effectively dispersed after welding, further reducing the risk of cracking or falling off of the welding area due to long-term use or changes in the external environment (such as pressure fluctuations, mechanical shocks, etc.).

[0052] This double-sided welding design not only effectively improves the sealing performance of the center hole 1a, but also significantly enhances the structural strength of the entire multi-way pipe joint. Compared with the traditional single-sided welding or non-reinforced structure design, the structure of the present invention greatly reduces the risk of air leakage caused by insufficient process precision during the manufacturing process, and simplifies the manufacturing process through a reasonable welding process, making the overall process more efficient. At the same time, the quality of the finished product after welding is more stable, with excellent fatigue resistance and long-term sealing ability, thus meeting the actual needs for high sealing and high reliability of air column products such as inflatable tents.

[0053] Furthermore, each tube body 1 is formed by rolling a tube sheet 1b, and two long sides of the tube sheet 1b are welded together through the second welding area 12 to form a sealed tubular structure. This design simplifies the material pre-processing process and improves production efficiency.

[0054] Before welding, the tube segments 1b are punched to form two parallel arc-shaped connection ports 13 at the end for butt welding of adjacent tube bodies 1. In addition, arc-shaped notches 14 are punched at the two corners and the middle (between the two parallel connection ports 13) of the butt end of the tube segments 1b. The notches 14 formed by the butt joints of the tube segments 1b after welding form the center hole 1a that runs through the entire multi-way pipe joint. Parts are also cut at the center hole 1a to facilitate subsequent welding of the sealing sheet 3 and the second reinforcing sheet 4, thereby enhancing the sealing performance and structural strength of the top center and the bottom center of the multi-way pipe joint.

[0055] In order to further improve the strength of the welding area, the size of the sealing sheet 3 is larger than the second reinforcing sheet 4, and the size of the second reinforcing sheet 4 is larger than the diameter of the center hole 1a. This size gradient design further improves the sealing performance and compressive strength around the center hole 1a and can reduce material usage.

[0056] In terms of material selection, the pipe body 1, the first reinforcement sheet 2 and the second reinforcement sheet 4 are usually made of a sandwich coating material, and the innermost layer and the outermost layer are both coatings, usually made of PVC (polyvinyl chloride), TPU (thermoplastic polyurethane) or other polymer materials. The coating can be conveniently welded by hot-melt connection. The middle layer is provided with a cloth layer or a mesh layer (such as a fiber mesh or a woven mesh) to improve the tensile resistance and enhance the durability and stability of the pipe body. The sealing sheet 3 is usually made of soft PVC, TPU or other stretchable soft film materials. The selection of these materials ensures that the sealing sheet 3 can maintain a good sealing state under various working conditions.

[0057] Preparation method

[0058] To realize the above structure, the present invention provides a welding method for manufacturing a gas column welding structure, comprising the following specific steps:

[0059] Step S1: Punching preparation

[0060] Take a tube segment 1b, and form an arc-shaped connection port 13 and an arc-shaped notch 14 at one end thereof by punching. The connection ports 13 are arranged in parallel along the end of the butt end of the tube segment 1b for subsequent welding of adjacent tube segments. The notch 14 is respectively arranged at the two corners of the end of the tube segment 1b and between the two connection ports 13 to form the center hole 1a of the multi-way pipe joint.

[0061] Step S2: Fold the tube in half

[0062] The tube sheet 1b is folded in half along the length direction to make the connection port 13 and the notch 14 form a pre-aligned state. This process can be completed before punching (step S1), and the order of the two can be interchanged without affecting the process effect.

[0063] Step S3: Stacking and alignment

[0064] The folded segments 1b are stacked one after another and adjusted so that the connection openings 13 and the notches 14 of all the segments are completely aligned. This step ensures the accuracy and uniformity of the subsequent welding process.

[0065] Step S4: Welding of the first welding area

[0066] The adjacent segments 1b are welded (thermal pressure welding or ultrasonic welding, etc.) along the periphery of the corresponding connection openings 13 to form a first welding area 11. After the welding is completed, the adjacent segments are connected to form a whole.

[0067] For example, if Figure 3 As shown, when the four segments 1b are butt-jointed, the edges of port B and port C should be aligned and welded together, the edges of port D and port E should be aligned and welded together, the edges of port F and port G should be aligned and welded together, and the edges of port H and port A should be aligned and welded together.

[0068] Step S5: Installing the first reinforcement sheet

[0069] The welded pipe segment 1b is unfolded, and a number of first reinforcing sheets 2 are taken and welded to the corresponding first welding areas 11. This process effectively enhances the strength and durability of the pipe body joint.

[0070] Step S6: Forming the tube body and the center hole

[0071] The two long sides of each tube segment 1b are welded along the second welding area 12 to form a sealed tube body 1. After all welding is completed, the notches 14 of each tube segment are butt-jointed to form the center hole 1a of the multi-way pipe joint.

[0072] Step S7: Sealing and strengthening the center hole

[0073] Take the sealing sheet 3 and the second reinforcing sheet 4, such as Figure 5 As shown, the sealing sheet 3 is placed inside the central hole 1a, the second reinforcing sheet 4 is placed outside the central hole 1a, and the three are welded at the third welding area 15. After welding, the sealing performance and mechanical strength of the central hole 1a are guaranteed.

[0074] The welding method of the present invention has simple steps and strong operability, and avoids the complex positioning and adjustment problems in traditional welding technology. In addition, the method adopts the method of folding in half and stacking in multiple layers, so that the efficiency of punching and welding is significantly improved. The welding process of the present invention has low requirements for processing accuracy and can significantly reduce production costs. At the same time, through reasonable structural design and material use, material savings are achieved. The formed gas column welding structure has excellent sealing performance and strength, can effectively avoid air leakage problems, and improve product reliability and service life.

[0075] like Figure 6 As shown, the present invention also discloses an inflatable tent frame, including a plurality of top air columns 5, the upper ends of the top air columns 5 are connected together by an air column welding structure as described above, the lower ends of the top air columns 5 are connected to supporting air columns 6, and the lower ends of the supporting air columns 6 are provided with supporting foot sealing structures.

[0076] The following are several embodiments of the support foot sealing structure:

[0077] like Figure 7 What is shown is a first embodiment of a supporting foot sealing structure, wherein the supporting foot sealing structure comprises an outer flange 61 arranged at the lower end of a supporting gas column 6, a sealing sheet 7 and a bottom cover sheet 8 are arranged in sequence below the outer flange 61, and the outer flange 61, the periphery of the sealing sheet 7 and the periphery of the bottom cover sheet 8 are welded together to form a fourth welding area 81.

[0078] The supporting gas column 6 and the bottom cover sheet 8 are preferably made of a mesh coating material, and the innermost layer and the outermost layer are both coatings. The sealing sheet 7 is preferably made of PVC (polyvinyl chloride), TPU (thermoplastic polyurethane) or other polymer materials. The supporting gas column 6 tube body + sealing sheet 7 + bottom cover sheet 8 are welded together to form a sealing structure, in which the sealing sheet 7 can play a role in increasing the welding strength.

[0079] like Figure 8 What is shown is the second embodiment of the supporting leg sealing structure, which is different from the above-mentioned first embodiment in that a hard plate 9 is sandwiched between the middle part of the bottom cover sheet 8 and the middle part of the sealing sheet 7, and a fifth welding area 82 surrounding the hard plate 9 is provided between the bottom cover sheet 8 and the sealing sheet 7.

[0080] This embodiment is improved on the basis of the first embodiment, and a hard plate 9 is added between the bottom cover sheet 8 and the sealing sheet 7. The hard plate 9 is placed between the sealing sheet 7 and the bottom cover sheet 8, and the periphery is welded. The supporting gas column 6 tube body + sealing sheet 7 + bottom cover sheet 8 are welded together to form a sealing structure.

[0081] The hard plate 9 is usually made of hard plastic, metal or wood, and is welded around to form a fifth welding area 82. Its functions are:

[0082] - Provide additional structural support to limit the deformation of the bottom caused by air pressure expansion.

[0083] -Prevent the bottom cover sheet 8 from tearing under high pressure conditions.

[0084] The addition of the hard plate 9 not only improves the overall rigidity of the bottom structure, but also significantly enhances the compression resistance, making the supporting feet more stable and durable.

[0085] like Fig. 9 The third embodiment of the support leg sealing structure is shown, which is different from the first embodiment in that an inner pull tab 10 is further provided as a reinforcement structure. The inner pull tab 10 is welded to the middle of the bottom cover sheet 8 and the welding area is the sixth welding area 83. The outer ring of the inner pull tab 10 is tightened upward and welded to the inner side wall of the support gas column 6 and the welding area is the seventh welding area 101.

[0086] The inner pull tab 10 is preferably made of a mesh coating material, and its innermost layer and outermost layer are both coatings. The inner pull tab 10 + sealing sheet 7 + bottom cover sheet 8 are welded together, and then the inner pull tab 10 is welded to the inner wall of the supporting gas column 6 tube body, and finally the supporting gas column 6 tube body + sealing sheet 7 + bottom cover sheet 8 are welded together to form a sealing structure.

[0087] Functions of the inner pull tab 10: 1) The inner pull tab 10 forms a reaction force by tightening the bottom structure inwards, limiting the excessive expansion of the bottom cover sheet 8 during inflation. 2) Preventing the bottom from tearing due to excessive pressure, further improving the sealing performance and durability. 3) The inner pull tab 10 is also made of a mesh coating material, and after being welded with the supporting gas column 6 tube body, a complete high sealing structure is formed.

[0088] like Fig.10 The fourth embodiment of the support leg sealing structure is shown. The difference from the third embodiment is that the fourth embodiment combines the advantages of the second and third embodiments, and places the hard plate 9 between the inner pull-tab 10 and the sealing sheet 7. The hard plate 9 is sandwiched between the middle of the bottom cover sheet 8 and the middle of the sealing sheet 7, and the inner pull-tab 10 is also arranged above the middle of the sealing sheet 7. The eighth welding area 84 surrounding the hard plate 9 is arranged between the middle of the inner pull-tab 10, the middle of the sealing sheet 7 and the middle of the bottom cover sheet 8. The outer ring of the inner pull-tab 10 is pulled upward and welded to the inner side wall of the support gas column 6, and the welding area is the ninth welding area 102.

[0089] Among them, the hard plate 9 is placed between the inner pull-tab 10 + sealing sheet 7 and the bottom cover sheet 8, and the surrounding parts are welded together. The supporting gas column 6 tube body + sealing sheet 7 + bottom cover sheet 8 are welded together to form a sealed structure. The hard plate 9 plate controls the expansion deformation of the bottom due to air pressure and prevents the bottom cover sheet 8 from tearing due to high pressure. The inner pull-tab 10 further strengthens the tension distribution at the bottom. The layout of multiple welding areas greatly improves the compression and tearing resistance of the overall structure, ensuring stability under high pressure conditions.

[0090] like Fig.11 The fifth embodiment of the support leg sealing structure is shown, which is different from the first embodiment in that the fifth embodiment adopts the design of the inner flange 62. The support leg sealing structure includes an inner flange 62 arranged at the lower end of the support gas column 6, and a bottom cover sheet 8 and a sealing sheet 7 are arranged above the inner flange 62 in sequence. The inner flange 62, the periphery of the bottom cover sheet 8 and the periphery of the sealing sheet 7 are welded together to form a tenth welding area 85.

[0091] Among them, the sealing sheet 7 is in the innermost layer, the bottom cover sheet 8 is in the middle, the inner flange 62 of the supporting air column 6 tube body is in the outermost layer, and the end of the supporting air column 6 tube body is naturally folded inward to form the inner flange 62. The sealing sheet 7 + bottom cover sheet 8 + inner flange 62 are welded together to form a sealing structure. After the three are welded, the tear resistance and sealing strength of the bottom are greatly enhanced.

[0092] Through the above multiple embodiments, the present invention provides a variety of sealing structure designs for the support legs of the inflatable tent, which can adapt to different application scenarios and strength requirements. These designs not only improve the pressure resistance and durability of the bottom of the supporting air column, but also effectively solve the problem of structural deformation or tearing caused by air pressure fluctuations, providing a more reliable guarantee for the use of the inflatable tent.

Claims

1. A gas column welding structure, characterized in that: The invention comprises a plurality of tube bodies (1), wherein the plurality of tube bodies (1) are butt-jointed together to form a multi-way tube joint, wherein a first welding area (11) for sealingly connecting the two adjacent tube bodies (1) is provided at the butt joint, wherein a center hole (1a) is provided at the top center and the bottom center of the multi-way tube joint, and a sealing sheet (7) (3) and a second reinforcing sheet (4) are respectively welded at the inner and outer sides of the periphery of the center hole (1a).

2. A gas column welding structure according to claim 1, characterized in that: A first reinforcing sheet (2) is welded to the first welding area (11).

3. The gas column welding structure according to claim 1, characterized in that: The pipe body (1) comprises a pipe sheet (1b) and is formed by rolling the pipe sheet (1b), and two long sides of the pipe sheet (1b) are provided with a second welding area (12) for sealingly connecting the two.

4. The gas column welding structure according to claim 3, characterized in that: The butt end of the pipe segment (1b) is punched with two parallel arc-shaped connection ports (13), and the first welding area (11) is formed by welding the peripheries of the connection ports (13) of adjacent pipe bodies (1) together.

5. The gas column welding structure according to claim 4, characterized in that: Arc-shaped notches (14) are punched at two corners and the middle of the butt-jointed ends of the tube sheet (1b), and the corresponding notches (14) of the tube bodies (1) are butt-jointed together to form the central hole (1a).

6. The gas column welding structure according to claim 1, characterized in that: The size of the sealing sheet (7) (3) is larger than the size of the second reinforcing sheet (4), the size of the second reinforcing sheet (4) is larger than the size of the center hole (1a), and a third welding area (15) is provided between the sealing sheet (7) (3), the second reinforcing sheet (4) and the periphery of the center hole (1a).

7. A welding method for manufacturing a gas column welding structure according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Take a tube segment (1b), punch a hole at one end of the tube segment (1b), and punch out an arc-shaped connection port (13) and a notch (14), wherein the connection port (13) is arranged in parallel at the end of the tube segment (1b), and the notch (14) is respectively arranged at two corners of the end of the tube segment (1b) and between the two connection ports (13); S2, folding the tube segment (1b) in half along the length direction of the tube segment (1b); S3, stacking the folded tube sheets (1b) in sequence, and aligning the connection ports (13) and the notches (14); S4, welding the adjacent pipe segments (1b) together along the periphery of the corresponding connection openings (13), wherein the welding position is the first welding area (11); S5, unfolding each tube segment (1b) in sequence, taking a plurality of first reinforcement sheets (2), and welding the first reinforcement sheets (2) to the corresponding first welding areas (11); S6, welding the two long sides of each pipe segment (1b) together to form a pipe body (1), wherein the welding position is the second welding area (12), and the whole forms a multi-way pipe joint, wherein the top center and the bottom center of the multi-way pipe joint form a center hole (1a) connected by the notches (14); S7, take the sealing sheet (7) (3) and the second reinforcing sheet (4), the sealing sheet (7) (3) is placed on the inner side of the center hole (1a), and the second reinforcing sheet (4) is located on the outer side of the center hole (1a), and the sealing sheet (7) (3), the periphery of the center hole (1a) and the second reinforcing sheet (4) are welded together, and the welding position is the third welding area (15); The order of steps S1 and S2 can be interchanged.

8. An inflatable tent frame, characterized in that: It comprises a plurality of top gas columns (5), the upper ends of the respective top gas columns (5) are connected together by a gas column welding structure according to any one of claims 1 to 6, the lower ends of the top gas columns (5) are connected to support gas columns (6), and the lower ends of the support gas columns (6) are provided with support foot sealing structures.

9. The inflatable tent frame according to claim 8, characterized in that: The support foot sealing structure comprises an outer flange (61) arranged at the lower end of the support air column (6), a sealing sheet (7) and a bottom cover sheet (8) are arranged in sequence below the outer flange (61), and the outer flange (61), the periphery of the sealing sheet (7) and the periphery of the bottom cover sheet (8) are welded together to form a fourth welding area (81).

10. The inflatable tent frame according to claim 9, characterized in that: A hard plate (9) is sandwiched between the middle of the bottom cover sheet (8) and the middle of the sealing sheet (7), and a fifth welding area (82) surrounding the hard plate (9) is provided between the bottom cover sheet (8) and the sealing sheet (7).

11. The inflatable tent frame according to claim 9, characterized in that: An inner pull tab (10) is welded to the middle of the bottom cover sheet (8), and the welding area is the sixth welding area (83). The outer ring of the inner pull tab (10) is pulled upward and welded to the inner side wall of the supporting gas column (6), and the welding area is the seventh welding area (101).

12. The inflatable tent frame according to claim 9, characterized in that: A hard plate (9) is sandwiched between the middle of the bottom cover sheet (8) and the middle of the sealing sheet (7), and an inner pull-out sheet (10) is also provided above the middle of the sealing sheet (7). An eighth welding area (84) surrounding the hard plate (9) is provided between the middle of the inner pull-out sheet (10), the middle of the sealing sheet (7) and the middle of the bottom cover sheet (8). The outer ring of the inner pull-out sheet (10) is tightened upward and welded to the inner wall of the supporting gas column (6), and the welding area is a ninth welding area (102).

13. The inflatable tent frame according to claim 8, characterized in that: The support foot sealing structure comprises an inner turn-down edge (62) arranged at the lower end of the support air column (6), a bottom cover sheet (8) and a sealing sheet (7) are arranged in sequence above the inner turn-down edge (62), and the periphery of the inner turn-down edge (62), the bottom cover sheet (8) and the periphery of the sealing sheet (7) are welded together to form a tenth welding area (85).

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