Air column connecting structure and connecting method thereof

Abstract

The air column connecting structure comprises a main pipe body and an auxiliary pipe body, a main pipe opening is formed in the side wall of the main pipe body, a tensile reinforcing piece and a main pipe sealing piece are sequentially arranged on the inner side of the main pipe opening from inside to outside, and the periphery of the tensile reinforcing piece and the periphery of the main pipe sealing piece are both connected with the inner side wall of the main pipe body in a sealed mode; an auxiliary pipe joint is connected to the outer side of the hole of the main pipe, an annular reinforcing piece is arranged on the outer side of the joint of the auxiliary pipe joint and the main pipe body, a joint sealing piece is arranged on the inner side of the auxiliary pipe joint, and one end of the joint sealing piece is connected with the main pipe sealing piece in a sealed mode. The auxiliary pipe joint, the joint sealing sheet and the auxiliary pipe body are hermetically connected together at the insertion part; a first air hole is formed in the middle of the tensile reinforcing piece, and a second air hole aligned with the first air hole is formed in the middle of the main pipe sealing piece. The method has the advantages of being high in quality, easy to manufacture and low in cost.

Description

Technical Field

[0001] The invention relates to the technical field of inflatable tents, and in particular to an air column connection structure and a connection method thereof. Background Art

[0002] The inflatable tents currently on the market face many challenges in terms of processing and production technology, especially in the design and manufacturing of the air column connection. Traditional production processes often lead to problems such as distortion and air leakage at the connection, which not only affects the overall performance of the tent, but also reduces the user experience.

[0003] Existing production processes usually rely on experienced professionals to perform manual operations, which leads to instability in the production process, long production cycles, low production efficiency, inconsistent product quality, and a significant increase in the training costs of structural personnel.

[0004] In addition, existing inflatable tent production equipment usually requires huge investment, and for small and medium-sized enterprises, the overall production cost is too high to bear.

[0005] 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

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a high-quality, easy-to-manufacture, low-cost gas column connection structure and a connection method thereof.

[0007] The present invention can be achieved through the following technical solutions:

[0008] In order to solve the above technical problems, the present invention provides a gas column connection structure, comprising a main pipe body and a sub-pipe body, wherein the side wall of the main pipe body is provided with a main pipe opening, and the inner side of the main pipe opening is provided with an anti-stretching reinforcement sheet and a main pipe sealing sheet in sequence from the inside to the outside, and the periphery of the anti-stretching reinforcement sheet and the periphery of the main pipe sealing sheet are both sealed and connected to the inner wall of the main pipe body;

[0009] The outer side of the main pipe opening is connected to a sub-pipe joint, the outer side of the connection between the sub-pipe joint and the main pipe body is provided with an annular reinforcing sheet, the inner side of the sub-pipe joint is provided with a joint sealing sheet, one end of the joint sealing sheet is sealed and connected with the main pipe sealing sheet, the sub-pipe body is inserted into the other end of the sub-pipe joint, and the sub-pipe joint, the joint sealing sheet and the sub-pipe body are sealed and connected together at the insertion point;

[0010] A first air hole is provided in the middle of the anti-stretching reinforcement sheet, and a second air hole aligned with the first air hole is provided in the middle of the main pipe sealing sheet.

[0011] In order to further solve the technical problem to be solved by the present invention, the present invention provides an air column connection structure, in which a ventilation plate through which gas can pass is provided on the inner side of the first air hole, and the periphery of the ventilation plate and the anti-tensile reinforcement plate and the main pipe sealing plate are hot-melt welded together.

[0012] In order to further solve the technical problem to be solved by the present invention, in an air column connection structure provided by the present invention, the main pipe opening is provided with a plurality of outward-turned first connecting flaps, one end of the secondary pipe joint is provided with a second connecting flap that can be mutually socketed with the first connecting flap, the annular reinforcement plate is sleeved on the outermost sides of the first connecting flap and the second connecting flap, and the first connecting flap, the second connecting flap and the annular reinforcement plate are hot-melt welded together to form an airtight structure.

[0013] In order to further solve the technical problem to be solved by the present invention, in an air column connection structure provided by the present invention, the periphery of the anti-tensile reinforcement plate, the periphery of the main pipe sealing plate and the inner wall of the main pipe body are welded together by hot melt to form an airtight structure; at the joint between the auxiliary pipe joint and the auxiliary pipe body, the auxiliary pipe joint, the joint sealing plate and the auxiliary pipe body are also welded together by hot melt to form an airtight structure.

[0014] In order to further solve the technical problem to be solved by the present invention, in an air column connection structure provided by the present invention, at the joint between the auxiliary pipe joint and the auxiliary pipe body, the joint sealing sheet is clamped between the inner wall of the auxiliary pipe joint and the outer wall of the auxiliary pipe body.

[0015] In order to further solve the technical problem to be solved by the present invention, in an air column connection structure provided by the present invention, the inner wall of the auxiliary tube body is provided with an auxiliary tube sealing plate, and the auxiliary tube sealing plate, the auxiliary tube body and the joint sealing plate are hot-melt welded together to form an airtight structure.

[0016] In order to further solve the technical problem to be solved by the present invention, in an air column connection structure provided by the present invention, at the joint between the auxiliary pipe joint and the auxiliary pipe body, one end of the joint sealing sheet extends to the inner wall of the auxiliary pipe body and is hot-melt welded thereto.

[0017] The present invention can also be implemented by the following technical solutions:

[0018] A gas column connection method using the above-mentioned gas column connection structure comprises the following specific steps:

[0019] S1, manufacturing a sealed liner assembly, that is, taking an anti-stretching reinforcement sheet, a main pipe sealing sheet, a joint sealing sheet and a vent sheet, opening a first air hole at the center of the anti-stretching reinforcement sheet, opening a second air hole at the center of the main pipe sealing sheet, processing the joint sealing sheet into a cylindrical shape, and then welding one end of the joint sealing sheet to the main pipe sealing sheet; placing the anti-stretching reinforcement sheet on the inner side of the main pipe sealing sheet and aligning the first air hole with the second air hole, placing the vent sheet on the inner side of the first air hole, and welding the periphery of the vent sheet and the anti-stretching reinforcement sheet and the main pipe sealing sheet together, and finally manufacturing the sealed liner assembly;

[0020] S2, manufacturing a main pipe joint assembly, that is, taking a main pipe body, an annular reinforcement sheet and an auxiliary pipe joint, punching out a main pipe opening on the main pipe body, and turning the main pipe opening outward to form a first connection flap; processing the auxiliary pipe joint from a sheet shape into a cylindrical shape, and turning the auxiliary pipe joint outward to form a second connection flap; processing the annular reinforcement sheet from a sheet shape into a closed ring cone, sleeve the first connection flap and the second connection flap, and then sleeve the annular reinforcement sheet on the outermost sides of the first connection flap and the second connection flap, and weld the first connection flap, the second connection flap and the annular reinforcement sheet together, and finally manufacturing the main pipe joint assembly;

[0021] S3, connecting the sealing liner assembly and the main pipe joint assembly, that is, placing the sealing liner assembly into the main pipe joint assembly, and welding the periphery of the anti-tensile reinforcement sheet, the periphery of the main pipe sealing sheet and the corresponding positions of the side wall of the main pipe body together to form a whole;

[0022] S4, connecting the main pipe body and the auxiliary pipe body, that is, taking the auxiliary pipe body, inserting one end of the auxiliary pipe body into the auxiliary pipe joint, and welding the auxiliary pipe body, the auxiliary pipe joint and the joint sealing sheet together to form an airtight structure.

[0023] In order to further solve the technical problem to be solved by the present invention, in a gas column connection method provided by the present invention, in step S2, a cylindrical lower mold and a columnar upper mold that can be sleeved in the lower mold are taken, the upper end of the inner side wall of the lower mold is provided with a first inclined surface, and the upper end of the outer side wall of the upper mold is provided with a second inclined surface that can cooperate with the first inclined surface; welding the annular reinforcement plate specifically includes the following steps:

[0024] S2.1, insert the auxiliary pipe joint into the lower die, pass the upper die through the main pipe opening from the inside to the outside, and then put the annular reinforcement plate on the lower die;

[0025] S2.2, insert the upper mold into the lower mold, and make the first connecting flap and the second connecting flap be socketed, and the annular reinforcement plate is sleeved on the outside of the first connecting flap and the second connecting flap, the first bevel and the second bevel clamp the first connecting flap, the second connecting flap and the annular reinforcement plate between the two and perform hot melt welding.

[0026] In order to further solve the technical problem to be solved by the present invention, in a gas column connection method provided by the present invention, in step S4, the auxiliary tube body is inserted between the inner wall of the auxiliary tube joint and the outer wall of the joint sealing plate, or the auxiliary tube body is inserted into the joint sealing plate.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] 1. The air column connection structure of the present invention connects the auxiliary pipe joint to the main pipe body so as to be connected to the auxiliary pipe body. And an anti-tensile reinforcement sheet and a main pipe sealing sheet are added on the inner side of the connection between the main pipe body and the auxiliary pipe joint, which are used to increase the tensile resistance and airtightness respectively. An annular reinforcement sheet is added on the outer side of the connection between the main pipe body and the auxiliary pipe joint to further increase the tensile resistance of the connection. A joint sealing sheet is added in the auxiliary pipe joint, one end of the joint sealing sheet is connected to the main pipe sealing sheet, and the other end is connected to the auxiliary pipe body, so as to form a coherent sealing layer between the auxiliary pipe body and the main pipe body, which greatly reduces the risk of gas leakage and ensures the stability and safety of the tent after inflation.

[0029] 2. The gas column connection method of the present invention improves the efficiency and accuracy of the connection, enhances the air tightness and structural stability, and reduces the complexity of manual operation, ensuring the high quality and reliability of the product. In addition, the gas column connection method adopts a mold-assisted welding design, which simplifies the assembly process of the connection parts through the combination of the lower mold and the upper mold, ensuring the precise docking and welding of each part. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0031] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0032] Figure 2 It is an exploded schematic diagram of the present invention;

[0033] Figure 3 yes Figure 2 Middle A-direction view;

[0034] Figure 4 It is a three-dimensional structural diagram of the upper die and the lower die;

[0035] Figure 5 is a cross-sectional schematic diagram of embodiment 1;

[0036] Figure 6 is a cross-sectional schematic diagram of embodiment 2;

[0037] Figure 7 is a cross-sectional schematic diagram of embodiment 3;

[0038] Figure 8It is a cross-sectional schematic diagram of embodiment 4. DETAILED DESCRIPTION

[0039] 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.

[0040] like Figures 1 to 8 An air column connection structure is shown, which aims to enhance the air tightness and tensile strength of the inflatable tent by optimizing the connection design, effectively solve the problem of air leakage and tearing at the air column connection of the existing inflatable tent, and simplify the manufacturing process.

[0041] The structure includes a main pipe body 1 and a secondary pipe body 2. The side wall of the main pipe body 1 is provided with a main pipe opening 11. The inside of the main pipe opening 11 is provided with an anti-stretching reinforcement sheet 3 and a main pipe sealing sheet 4 from the inside to the outside. The periphery of the anti-stretching reinforcement sheet 3 and the periphery of the main pipe sealing sheet 4 are sealed and connected to the inner wall of the main pipe body 1.

[0042] The outer side of the main pipe opening 11 is connected to a sub-pipe joint 5, and the outer side of the connection between the sub-pipe joint 5 and the main pipe body 1 is provided with an annular reinforcement sheet 6, and the inner side of the sub-pipe joint 5 is provided with a joint sealing sheet 7, and one end of the joint sealing sheet 7 is sealed and connected to the main pipe sealing sheet 4, and the sub-pipe body 2 is inserted into the other end of the sub-pipe joint 5, and the sub-pipe joint 5, the joint sealing sheet 7 and the sub-pipe body 2 are sealed and connected together at the insertion point.

[0043] The present invention connects a sub-pipe joint 5 to the main pipe body 1 so as to be connected to the sub-pipe body 2. An anti-tensile reinforcement sheet 3 and a main pipe sealing sheet 4 are added inside the connection between the main pipe body 1 and the sub-pipe joint 5, which are used to increase the tensile resistance and airtightness respectively. An annular reinforcement sheet 6 is added outside the connection between the main pipe body 1 and the sub-pipe joint 5 to further increase the tensile resistance of the connection. A joint sealing sheet 7 is added inside the sub-pipe joint 5, one end of the joint sealing sheet 7 is connected to the main pipe sealing sheet 4, and the other end is connected to the sub-pipe body 2, so as to form a coherent sealing layer between the sub-pipe body 2 and the main pipe body 1, which greatly reduces the risk of gas leakage and ensures the stability and safety of the tent after inflation.

[0044] The invention solves the current problems of difficulty in tent production and unstable and non-standard quality. It does not require manual work by experienced professionals, and can use molds and equipment for batch production and processing. Ordinary employees can use the equipment for production after a little training. It improves production efficiency and quality yield rate and reduces production costs. The components are modularized and standardized, and this structure solves the problems of product distortion and air leakage to a large extent.

[0045] In terms of material selection, the tensile strength reinforcement sheet 3 and the annular reinforcement sheet 6 are preferably made of high-strength materials such as nylon woven PVC double-sided coated cloth and mesh. The main pipe body 1, the auxiliary pipe joint 5 and the auxiliary pipe body 2 are also preferably made of such materials. These materials not only have excellent tensile resistance, but also can effectively prevent puncture and tearing. The main pipe sealing sheet 4 and the joint sealing sheet 7 are mainly made of soft soft film materials, including but not limited to PVC and TPU. The flexibility of these materials ensures that they can maintain good sealing performance during compression and stretching. In addition, the innermost and outermost layers of these materials are preferably connected by hot melt welding, which further enhances the firmness and airtightness of the overall structure and facilitates manufacturing.

[0046] Of course, a first air hole 31 is provided in the middle of the tensile reinforcement sheet 3, and a second air hole 41 aligned with the first air hole 31 is provided in the middle of the main pipe sealing sheet 4. Furthermore, a vent sheet 8 through which gas can pass is provided inside the first air hole 31, and the periphery of the vent sheet 8 is heat-melted and welded to the tensile reinforcement sheet 3 and the main pipe sealing sheet 4. The first air hole 31 and the second air hole 41 are both for ventilation; the vent sheet 8 is intended to provide a good air flow channel while preventing the intrusion of external impurities.

[0047] Furthermore, the main pipe opening 11 is designed with a plurality of outwardly turned first connection flaps 12, which not only enhance the stability of the connection, but also provide more contact surfaces for the installation of the auxiliary pipe joint 5. Specifically, one end of the auxiliary pipe joint 5 is designed with a second connection flap 51 that is mutually sleeved with the first connection flap 12, and this structure enables the auxiliary pipe joint 5 to be firmly embedded in the main pipe body 1 and ensures a tight connection between the two.

[0048] In order to further improve the overall strength and air tightness of the connection, an annular reinforcement sheet 6 is sleeved on the outermost sides of the first connection flap 12 and the second connection flap 51. The main function of the annular reinforcement sheet 6 is to increase the structural strength and tensile strength, disperse the pressure of the connection, and prevent tearing or deformation caused by external forces. This design not only provides additional support for the connection, but also effectively prevents gas leakage.

[0049] During the manufacturing process, the first connecting flap 12, the second connecting flap 51 and the annular reinforcing sheet 6 are tightly combined together by hot-melt welding to form a strong airtight structure.

[0050] Furthermore, the periphery of the tensile strength reinforcement sheet 3, the periphery of the main pipe sealing sheet 4 and the inner wall of the main pipe body 1 are preferably welded together by hot melt to form an airtight structure, and of course they can also be connected by gluing or other methods.

[0051] At the joint of the secondary pipe joint 5 and the secondary pipe body 2, the secondary pipe joint 5, the joint sealing sheet 7 and the secondary pipe body 2 are preferably welded together by hot melt to form an airtight structure. The following are several examples of the joint of the secondary pipe joint 5 and the secondary pipe body 2:

[0052] Embodiment 1: Figure 5 The embodiment 1 of the present invention is shown. In this embodiment, at the joint of the auxiliary pipe joint 5 and the auxiliary pipe body 2, the joint sealing sheet 7 is sandwiched between the inner wall of the auxiliary pipe joint 5 and the outer wall of the auxiliary pipe body 2, that is, the auxiliary pipe body 2 is directly inserted into the joint sealing sheet 7, and the three are welded together by heat fusion. The number of welding circles is at least one circle, and two or more circles can also be welded.

[0053] Embodiment 2: Figure 6 The second embodiment of the present invention is shown, which is different from the first embodiment described above in that, in this embodiment, the inner wall of the auxiliary tube body 2 is provided with an auxiliary tube sealing sheet 9, and the auxiliary tube sealing sheet 9, the auxiliary tube body 2, and the joint sealing sheet 7 are heat-melted and welded together to form an airtight structure. The auxiliary tube sealing sheet 9 is also preferably made of PVC, TPU and other materials, which further enhances the sealing performance of the joint between the auxiliary tube joint 5 and the auxiliary tube body 2.

[0054] Embodiment 3: Figure 7 What is shown is embodiment 3 of the present invention, which is different from the above-mentioned embodiment 2 in that, in this embodiment, one end of the auxiliary pipe sealing sheet 9 extends toward the auxiliary pipe joint 5, and the extended end of the auxiliary pipe sealing sheet 9 is hot-melt welded to the inner wall of the auxiliary pipe joint 5 to form an airtight structure, and the airtight structure can completely seal the end of the auxiliary pipe body 2, further improving the sealing performance.

[0055] Embodiment 4: Figure 8 The fourth embodiment of the present invention is shown, which is different from the first embodiment described above in that, in this embodiment, at the joint of the sub-tube joint 5 and the sub-tube body 2, one end of the joint sealing sheet 7 extends to the inner wall of the sub-tube body 2 and is heat-melted thereto. That is, the sub-tube body 2 is inserted between the sub-tube joint 5 and the joint sealing sheet 7, or one end of the joint sealing sheet 7 extends toward the sub-tube body 2 and completely seals the end of the sub-tube body 2, which is also to increase the sealing performance.

[0056] Of course, in the above embodiments, the number of welding circles at the hot melt welding position is at least one circle, and two or more circles may also be welded.

[0057] The present invention also discloses a gas column connection method, which is simple and convenient, has high efficiency and high product quality, and includes the following specific steps:

[0058] S1, manufacturing a sealed liner assembly, namely, taking an anti-stretching reinforcement sheet 3, a main pipe sealing sheet 4, a joint sealing sheet 7 and a vent sheet 8, opening a first air hole 31 at the center of the anti-stretching reinforcement sheet 3, opening a second air hole 41 at the center of the main pipe sealing sheet 4, processing the joint sealing sheet 7 into a cylindrical shape, and then welding one end of the joint sealing sheet 7 to the main pipe sealing sheet 4; placing the anti-stretching reinforcement sheet 3 on the inner side of the main pipe sealing sheet 4 and aligning the first air hole 31 with the second air hole 41, placing the vent sheet 8 on the inner side of the first air hole 31, and welding the periphery of the vent sheet 8 to the anti-stretching reinforcement sheet 3 and the main pipe sealing sheet 4, and finally manufacturing a sealed liner assembly;

[0059] S2, manufacturing a main pipe joint assembly, that is, taking the main pipe body 1, the annular reinforcement sheet 6 and the auxiliary pipe joint 5, punching out a main pipe opening 11 on the main pipe body 1, and turning the main pipe opening 11 outward to form a first connection flap 12; processing the auxiliary pipe joint 5 from a sheet shape into a cylindrical shape, and turning the auxiliary pipe joint 5 outward to form a second connection flap 51; processing the annular reinforcement sheet 6 from a sheet shape into a closed ring cone, sleeve the first connection flap 12 and the second connection flap 51, and then sleeve the annular reinforcement sheet 6 on the outermost sides of the first connection flap 12 and the second connection flap 51, and weld the first connection flap 12, the second connection flap 51 and the annular reinforcement sheet 6 together, and finally manufacturing the main pipe joint assembly;

[0060] S3, connecting the sealing liner assembly and the main pipe joint assembly, that is, placing the sealing liner assembly into the main pipe joint assembly, welding the periphery of the tensile reinforcement sheet 3, the periphery of the main pipe sealing sheet 4 and the corresponding position of the side wall of the main pipe body 1 together to form a whole;

[0061] S4, connecting the main pipe body 1 and the auxiliary pipe body 2, that is, taking the auxiliary pipe body 2, inserting one end of the auxiliary pipe body 2 into the auxiliary pipe joint 5, and welding the auxiliary pipe body 2, the auxiliary pipe joint 5 and the joint sealing sheet 7 together to form an airtight structure.

[0062] Furthermore, in order to further increase the convenience of the gas column connection process, in step S2, a mold, that is, a cylindrical lower mold 100 (such as Figure 4 As shown), and a columnar upper mold 200 (as shown) that can be sleeved in the lower mold 100 Figure 4 As shown), the upper end of the inner wall of the lower mold 100 is provided with a first inclined surface 101, and the upper end of the outer wall of the upper mold 200 is provided with a second inclined surface 201 that can cooperate with the first inclined surface 101; welding the annular reinforcement sheet 6 specifically includes the following steps:

[0063] S2.1, insert the auxiliary pipe joint 5 into the lower mold 100, pass the upper mold 200 through the main pipe opening 11 from the inside to the outside, and then put the annular reinforcement sheet 6 on the lower mold 100;

[0064] S2.2, insert the upper mold 200 into the lower mold 100, and make the first connecting petal 12 and the second connecting petal 51 overlap, and the annular reinforcement plate 6 is sleeved outside the first connecting petal 12 and the second connecting petal 51, the first inclined surface 101 and the second inclined surface 201 clamp the first connecting petal 12, the second connecting petal 51 and the annular reinforcement plate 6 therebetween and perform hot-melt welding.

[0065] In addition to the above-mentioned welding method, the main pipe body 1 and the auxiliary pipe joint 5 can also be inserted into a rotatable mold core, the annular reinforcement plate 6 can be inserted into the joint of the main pipe body 1 and the auxiliary pipe joint 5, and then the mold core can be rotated to perform welding in multiple times. That is, this processing operation is a rotary mold processing method.

[0066] Furthermore, the connection between the auxiliary pipe body 2 and the auxiliary pipe joint 5 in step S4 can be implemented in different embodiments. Figure 5 In the first embodiment shown, the auxiliary pipe body 2 is inserted between the inner wall of the auxiliary pipe joint 5 and the outer wall of the joint sealing sheet 7. Figure 8 In the fourth embodiment shown, the auxiliary pipe body 2 is inserted into the joint sealing sheet 7. Figure 6 The second embodiment shown and Figure 7 In the third embodiment shown, a secondary pipe sealing sheet 9 is additionally provided inside the secondary pipe body 2 , and the secondary pipe sealing sheet 9 , the secondary pipe body 2 , the secondary pipe joint 5 , and the joint sealing sheet 7 are welded together to form an airtight structure.

[0067] Through the above steps, the gas column connection method not only improves the efficiency and convenience of connection, but also effectively guarantees the quality of the product, providing a solid foundation for subsequent use.

Claims

1. An air column connection structure, characterized in that: The invention comprises a main pipe body (1) and a secondary pipe body (2), wherein the side wall of the main pipe body (1) is provided with a main pipe opening (11), and the inner side of the main pipe opening (11) is provided with an anti-stretching reinforcement sheet (3) and a main pipe sealing sheet (4) in sequence from the inside to the outside, and the periphery of the anti-stretching reinforcement sheet (3) and the periphery of the main pipe sealing sheet (4) are both sealed and connected to the inner side wall of the main pipe body (1); The outer side of the main pipe opening (11) is connected to a secondary pipe joint (5); the outer side of the connection between the secondary pipe joint (5) and the main pipe body (1) is provided with an annular reinforcing sheet (6); the inner side of the secondary pipe joint (5) is provided with a joint sealing sheet (7); one end of the joint sealing sheet (7) is sealedly connected to the main pipe sealing sheet (4); the secondary pipe body (2) is inserted into the other end of the secondary pipe joint (5); and the secondary pipe joint (5), the joint sealing sheet (7) and the secondary pipe body (2) are sealedly connected together at the insertion point; The anti-stretching reinforcing sheet (3) is provided with a first air hole (31) in the middle, and the main pipe sealing sheet (4) is provided with a second air hole (41) in the middle, which is aligned with the first air hole (31).

2. The air column connection structure according to claim 1, characterized in that: A vent sheet (8) through which gas can pass is provided inside the first air hole (31), and the periphery of the vent sheet (8) is heat-melted and welded together with the anti-tensile reinforcement sheet (3) and the main pipe sealing sheet (4).

3. The air column connection structure according to claim 1, characterized in that: The main pipe opening (11) is provided with a plurality of outwardly turned first connecting flaps (12); one end of the auxiliary pipe joint (5) is provided with a second connecting flap (51) which can be mutually sleeved with the first connecting flap (12); the annular reinforcing sheet (6) is sleeved on the outermost sides of the first connecting flap (12) and the second connecting flap (51); and the first connecting flap (12), the second connecting flap (51) and the annular reinforcing sheet (6) are hot-melt welded together to form an airtight structure.

4. The air column connection structure according to claim 1, characterized in that: The periphery of the tensile strength reinforcement sheet (3), the periphery of the main pipe sealing sheet (4) and the inner wall of the main pipe body (1) are welded together by hot-melt welding to form an airtight structure; at the joint between the auxiliary pipe joint (5) and the auxiliary pipe body (2), the auxiliary pipe joint (5), the joint sealing sheet (7) and the auxiliary pipe body (2) are also welded together by hot-melt welding to form an airtight structure.

5. The air column connection structure according to claim 4, characterized in that: At the joint between the secondary pipe joint (5) and the secondary pipe body (2), the joint sealing sheet (7) is clamped between the inner wall of the secondary pipe joint (5) and the outer wall of the secondary pipe body (2).

6. The air column connection structure according to claim 5, characterized in that: The inner side wall of the auxiliary tube body (2) is provided with an auxiliary tube sealing sheet (9), and the auxiliary tube sealing sheet (9), the auxiliary tube body (2) and the joint sealing sheet (7) are hot-melt welded together to form an airtight structure.

7. The air column connection structure according to claim 4, characterized in that: At the joint between the auxiliary pipe joint (5) and the auxiliary pipe body (2), one end of the joint sealing sheet (7) extends to the inner side wall of the auxiliary pipe body (2) and is heat-melted and welded thereto.

8. A method for connecting an air column using the air column connection structure according to any one of claims 1 to 7, characterized in that: The specific steps include: S1, manufacturing a sealed liner assembly, namely, taking an anti-stretching reinforcement sheet (3), a main pipe sealing sheet (4), a joint sealing sheet (7) and a vent sheet (8), opening a first air hole (31) at the center of the anti-stretching reinforcement sheet (3), opening a second air hole (41) at the center of the main pipe sealing sheet (4), processing the joint sealing sheet (7) into a cylindrical shape, and then welding one end of the joint sealing sheet (7) to the main pipe sealing sheet (4); placing the anti-stretching reinforcement sheet (3) on the inner side of the main pipe sealing sheet (4) and aligning the first air hole (31) and the second air hole (41), placing the vent sheet (8) on the inner side of the first air hole (31), and welding the periphery of the vent sheet (8) and the anti-stretching reinforcement sheet (3) and the main pipe sealing sheet (4), and finally manufacturing the sealed liner assembly; S2, manufacturing a main pipe joint assembly, namely, taking a main pipe body (1), an annular reinforcement sheet (6) and an auxiliary pipe joint (5), punching out a main pipe opening (11) on the main pipe body (1), and turning the main pipe opening (11) outward to form a first connection flap (12); processing the auxiliary pipe joint (5) from a sheet shape into a cylindrical shape, and turning the auxiliary pipe joint (5) outward to form a second connection flap (51); processing the annular reinforcement sheet (6) from a sheet shape into a closed ring cone, sleeve-connecting the first connection flap (12) and the second connection flap (51), and then sleeve the annular reinforcement sheet (6) on the outermost sides of the first connection flap (12) and the second connection flap (51), and weld the first connection flap (12), the second connection flap (51) and the annular reinforcement sheet (6) together, and finally manufacturing the main pipe joint assembly; S3, connecting the sealing liner assembly and the main pipe joint assembly, that is, placing the sealing liner assembly into the main pipe joint assembly, and welding the periphery of the anti-tensile reinforcement sheet (3), the periphery of the main pipe sealing sheet (4) and the corresponding positions of the side wall of the main pipe body (1) together to form a whole; S4, connecting the main pipe body (1) and the auxiliary pipe body (2), that is, taking the auxiliary pipe body (2), inserting one end of the auxiliary pipe body (2) into the auxiliary pipe joint (5), and welding the auxiliary pipe body (2), the auxiliary pipe joint (5) and the joint sealing sheet (7) together to form an airtight structure.

9. A gas column connection method according to claim 8, characterized in that: In step S2, a cylindrical lower mold (100) and a columnar upper mold (200) that can be sleeved in the lower mold (100) are taken, the upper end of the inner wall of the lower mold (100) is provided with a first inclined surface (101), and the upper end of the outer wall of the upper mold (200) is provided with a second inclined surface (201) that can cooperate with the first inclined surface (101); welding the annular reinforcing sheet (6) specifically includes the following steps: S2.1, insert the auxiliary pipe joint (5) into the lower mold (100), pass the upper mold (200) through the main pipe opening (11) from the inside to the outside, and then put the annular reinforcement plate (6) on the lower mold (100); S2.2, insert the upper mold (200) into the lower mold (100), and make the first connecting flap (12) and the second connecting flap (51) overlap, and the annular reinforcement plate (6) is covered outside the first connecting flap (12) and the second connecting flap (51), and the first inclined surface (101) and the second inclined surface (201) clamp the first connecting flap (12), the second connecting flap (51) and the annular reinforcement plate (6) therebetween and perform hot-melt welding.

10. A gas column connection method according to claim 8, characterized in that: In step S4, the auxiliary tube body (2) is inserted between the inner wall of the auxiliary tube joint (5) and the outer wall of the joint sealing sheet (7), or the auxiliary tube body (2) is inserted into the joint sealing sheet (7).

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