A pipe connection structure and an inflatable tent frame
By setting a low melting point heat sealing layer and a high melting point tensile resistance layer on the pipe body of the inflatable tent skeleton, and using hot melting connection and hot pressing welding technology, the problem of complex and high cost of pipe membrane connection in the traditional inflatable tent skeleton is solved, and the simplicity and strength of the pipe body connection are achieved.
Patent Information
- Application Number
- CN202421281240.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2023-10-28
- Filing Date
- 2024-06-05
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-06-05
AI Technical Summary
The pipe membrane connection method of traditional inflatable tent skeletons is complex and costly. The single-material gas column structure is not strong and difficult to weld or bond, especially at multi-pass connections.
A pipe body connection structure is adopted, by providing a low melting point heat sealing layer and a high melting point tensile resistance layer on the inner and outer walls of the first pipe body and the second pipe body, a simple and strong connection of the pipe body is achieved by using hot melt connection and hot press welding technology.
The simplicity and strength of pipe body connection are achieved, the welding cost is reduced, the complex three-dimensional tooling in traditional methods is avoided, and the long pipe film can be handled.
Smart Images
Figure CN222745791U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of inflatable columns, in particular to a pipe body connection structure and an inflatable tent frame. Background Art
[0002] Inflatable objects such as inflatable tents often use inflatable air columns as their skeletons. The joints of the air columns usually need to be connected. The traditional method is to use tube membranes of the same material (single-material air columns) and weld or glue the tube membranes of the same material through a three-dimensional clamp. The clamps required in this method are complex and costly. In addition, the structural strength of a single-material air column is not high. However, if a composite tube membrane is used, the joints of the composite tube membrane are also difficult to weld or glue, especially the multi-way joints.
[0003] In addition, the traditional tube membrane connection method requires reaching into the tube membrane for three-dimensional welding, which is unable to handle relatively long tube membranes and is quite limited.
[0004] The utility model is made based on this situation. Utility Model Content
[0005] The utility model aims to overcome the deficiencies of the prior art and provide a pipe body connection structure and an inflatable tent frame which are easy to weld.
[0006] The utility model is realized by the following technical solutions:
[0007] In order to solve the above technical problems, the utility model provides a tube body connection structure, including a first tube body and a second tube body that are connected, a first melting portion is provided on the inner wall or the outer wall of the first tube body, a second melting portion corresponding to the first melting portion is provided on the second tube body, and the first melting portion and the second melting portion are hot-melt connected.
[0008] In order to further solve the technical problem to be solved by the utility model, the utility model provides a tube body connection structure, in which a welding port is opened on the side wall of the first tube body, one end of the second tube body is inserted into the welding port, and the first melting part and the second melting part are abutted so that the two can be hot-melt connected together.
[0009] In order to further solve the technical problem to be solved by the utility model, in a tube body connection structure provided by the utility model, the innermost layer of the first tube body is a low melting point heat sealing layer composed of a first melting part, and the outermost layer of the first tube body is a high melting point anti-stretching layer; the innermost layer of the second tube body is a high melting point anti-stretching layer, and the outermost layer of the second tube body is a low melting point heat sealing layer composed of a second melting part, and the hot melting temperature of the low melting point heat sealing layer is lower than the hot melting temperature of the high melting point anti-stretching layer.
[0010] In order to further solve the technical problem to be solved by the utility model, the utility model provides a tube body connection structure, which also includes a relay tube, the innermost layer of the relay tube is a high melting point anti-tensile layer and the outermost layer is a low melting point heat sealing layer, one end of the relay tube is inserted into the first tube body and hot-melt welded together, and the other end of the relay tube extends out of one end of the first tube body.
[0011] In order to further solve the technical problem to be solved by the utility model, in a tube body connection structure provided by the utility model, the first tube body and the second tube body can be flattened and then hot-pressed welded, and the welding port after flattening is arc-shaped. After the second tube body is inserted into the welding port, the outer wall of the second tube body and the inner wall of the first tube body around the welding port are adhered and welded together.
[0012] In order to further solve the technical problem to be solved by the utility model, in a pipe body connection structure provided by the utility model, the low melting point heat sealing layer is PE or PVC.
[0013] In order to further solve the technical problem to be solved by the utility model, in a pipe body connection structure provided by the utility model, the high melting point anti-tensile layer is PA or PET.
[0014] In order to further solve the technical problem to be solved by the utility model, the utility model provides a tube body connection structure, wherein the tube body connection structure also includes a first connected tube and a second connected tube, the innermost layers of the first connected tube and the second connected tube are both low-melting-point heat-sealing layers and the outermost layers are both high-melting-point tensile-resistant layers, the first connected tube is sleeved on the relay tube and heat-melted together, the second connected tube is sleeved on the second tube body and heat-melted together, and the first tube body, the second tube body, the relay tube, the first connected tube and the second connected tube can all be flattened and then hot-pressed welded.
[0015] In order to further solve the technical problem to be solved by the utility model, in a pipe body connection structure provided by the utility model, the inner diameter of the first pipe body, the outer diameter of the relay pipe and the inner diameter of the first connected pipe are equal, and the outer diameter of the second pipe body and the inner diameter of the second connected pipe are equal.
[0016] The utility model can also be implemented through the following technical solutions:
[0017] In order to solve the above technical problems, the utility model provides an inflatable tent frame with the above-mentioned tube body connection structure, wherein the inflatable tent frame also includes a plurality of supporting leg air columns and frame connecting air columns, and the connection points of any three or four of the supporting leg air columns and frame connecting air columns are connected through the tube body connection structure.
[0018] Compared with the prior art, the utility model has the following advantages:
[0019] 1. In the present invention, the first tube body, the second tube body, the relay tube, the first connected tube and the second connected tube can be flattened before hot pressing welding. When welding, the tube body connection structure body, the first connected tube and the second connected tube are directly sleeved together and flattened, and then hot pressing the corresponding positions. No three-dimensional tooling is required, and plane welding can be achieved. It is also convenient to use a hot pressing machine for automatic hot pressing. Therefore, welding is relatively simple and convenient, and the cost is low.
[0020] 2. In the utility model, the welding between the first tube body, the second tube body, the relay tube, the first connected tube and the second connected tube can be done by directly putting the corresponding positions together so that the corresponding low-melting-point heat-sealing layers are in contact with each other, and then hot pressing outside the tube membrane can complete the welding, without inserting the welding into the tube, so it will not be limited by the length of the tube membrane, and can handle very long connected tubes. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:
[0022] Figure 1 It is a three-dimensional structural schematic diagram of the pipe body connection structure in the utility model;
[0023] Figure 2 It is an exploded schematic diagram of the pipe body connection structure in the utility model;
[0024] Figure 3 It is a cross-sectional view of the pipe body connection structure in the utility model;
[0025] Figure 4 It is a three-dimensional structural schematic diagram of the inflatable tent frame in the utility model. DETAILED DESCRIPTION
[0026] 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.
[0027] like Figures 1 to 3 A tube body connection structure 1 shown includes a first tube body 11 and a second tube body 12 that are connected to each other. A first melting portion is provided on the inner wall or the outer wall of the first tube body 11, and a second melting portion corresponding to the first melting portion is provided on the second tube body 12. The first melting portion and the second melting portion are hot-melt connected.
[0028] Generally, the end of one of the second tube body 12 and the first tube body 11 is connected to the side wall of the other, and the position of the second melting portion corresponds to the position of the first melting portion. For example, in one case, the end of the second tube body 12 is connected to the side wall of the first tube body 11, and the first melting portion is located on the inner wall of the first tube body 11, then the second melting portion is located on the outer wall of the second tube body 12, and this is used as an example in the following text. In another case, the end of the first tube body 11 is connected to the side wall of the second tube body 12, and the first melting portion is located on the outer wall of the first tube body 11, then the second melting portion is located on the inner wall of the second tube body 12.
[0029] It is worth noting that the pipe body connection structure 1 can be a three-way, a four-way, etc., which depends on the number of the first pipe bodies 11 and the second pipe bodies 12.
[0030] More specifically, Figure 2 , Figure 3 As shown, the side wall of the first tube body 11 is provided with a welding port 111, one end of the second tube body 12 is inserted into the welding port 111, and the first melting portion and the second melting portion are abutted so that the two can be heat-melted together. Therefore, when manufacturing the tube body connection structure 1, the second tube body 12 can be inserted into the welding port 111, then flattened, and finally hot-pressed, which is convenient to manufacture.
[0031] Of course, the first tube body 11 and the second tube body 12 are connected through the welding port 111 .
[0032] More specifically, the innermost layer of the first tube body 11 is a low-melting-point heat-sealing layer 1a composed of a first melting portion, and the outermost layer of the first tube body 11 is a high-melting-point anti-stretching layer 1b; the innermost layer of the second tube body 12 is a high-melting-point anti-stretching layer 1b, and the outermost layer of the second tube body 12 is a low-melting-point heat-sealing layer 1a composed of a second melting portion, and the hot melting temperature of the low-melting-point heat-sealing layer 1a is lower than the hot melting temperature of the high-melting-point anti-stretching layer 1b.
[0033] The first tube body 11 and the second tube body 12 of the utility model are both films composited by high and low temperature materials, wherein the high temperature material (i.e. the high melting point anti-stretching layer 1b) plays an anti-stretching role, and the low temperature material (i.e. the low melting point heat sealing layer 1a) plays a heat sealing role.
[0034] Furthermore, in order to facilitate welding between the tube body connection structure 1 and the connected tube, the tube body connection structure 1 also includes a relay tube 13, the innermost layer of the relay tube 13 is a high melting point tensile resistance layer 1b and the outermost layer is a low melting point heat sealing layer 1a, one end of the relay tube 13 is inserted into the first tube body 11 and heat-melt welded together, and the other end of the relay tube 13 extends out of one end of the first tube body 11. The relay tube 13 is mainly used to connect the first tube body 11 and the connected tube, one end of the relay tube 13 extends out of the first tube body 11, and the extended part is mainly used to be inserted into the connected tube to facilitate welding with the connected tube, which will be described in detail later. Similarly, when making the tube body connection structure 1, a part of the relay tube 13 can be inserted into the first tube body 11 and heat-melt welded together, and the other part of the relay tube 13 is exposed, and the exposed part is used for welding with the connected tube.
[0035] More specifically, the first tube body 11 and the second tube body 12 can be flattened before hot-pressing welding, which is more convenient for heat sealing. The flattened welding port 111 is arc-shaped. After the second tube body 12 is inserted into the welding port 111, the outer wall of the second tube body 12 is attached to and welded with the inner wall of the first tube body 11 around the welding port 111. After the second tube body 12 is inserted into the welding port 111, the outer wall of the second tube body 12 is in contact with the inner wall of the first tube body 11, and the outer wall of the second tube body 12 and the inner wall of the first tube body 11 are both low-melting-point heat-sealing layers 1a, so the two can be directly hot-pressed welded after being flattened.
[0036] Preferably, the low melting point heat sealing layer 1a is PE or PVC; the high melting point anti-stretching layer 1b is PA or PET.
[0037] The melting points of the above materials are as follows:
[0038] PA (nylon) melting point: 260-280℃
[0039] PET melting point: 250-255℃
[0040] PVC melting point: 160-180℃
[0041] PE melting point: 100-130℃
[0042] By utilizing the temperature difference, PA+PE can be made into a composite film. Of course, combinations such as PET+PE, PA+PVC, and PET+PVC are also possible.
[0043] like Figures 1 to 3 As shown, the tube body connection structure 1 also includes a first connected tube 2 and a second connected tube 3, wherein the innermost layers of the first connected tube 2 and the second connected tube 3 are both low-melting point heat-sealing layers 1a and the outermost layers are both high-melting point anti-tensile layers 1b.
[0044] The welding between the pipe body connection structure 1 and the first connected pipe 2 and the second connected pipe 3 of the utility model is simple, convenient and low in cost. The specific welding method between the pipe body connection structure 1 and the first connected pipe 2 and the second connected pipe 3 is as follows: the first connected pipe 2 is sleeved on the relay pipe 13 and heat-melted and welded together, and the second connected pipe 3 is sleeved on the second pipe body 12 and heat-melted and welded together. Obviously, after the first connected pipe 2 is sleeved on the relay pipe 13 (the free end of the relay pipe 13 is inserted into the first connected pipe 2), the inner layer of the first connected pipe 2 is in contact with the outer layer of the relay pipe 13, and both are low-melting-point heat-sealing layers 1a, and hot-pressing welding can be performed. Similarly, after the second connected pipe 3 is sleeved on the second pipe body 12, the inner layer of the second connected pipe 3 is in contact with the outer layer of the second pipe body 12, and both are low-melting-point heat-sealing layers 1a, and hot-pressing welding can be performed. Therefore, the pipe body connection structure of the utility model is convenient to weld, and can be hot-pressed by directly putting the corresponding positions together. The operation is simple, no tooling is required, and the cost is relatively low.
[0045] More specifically, the first tube body 11, the second tube body 12, the relay tube 13, the first connected tube 2 and the second connected tube 3 can all be flattened before being hot-pressed and welded. In this way, when welding, the tube body connection structure 1, the first connected tube 2 and the second connected tube 3 are directly put together and flattened, and then hot-pressed at the corresponding positions, without the need for any three-dimensional tooling, plane welding can be achieved, and it is also convenient to use a hot press machine for automatic hot pressing, so welding is relatively simple and convenient, and the cost is low.
[0046] In addition, due to the welding between the first tube body 11, the second tube body 12, the relay tube 13, the first connected tube 2 and the second connected tube 3, the corresponding positions can be directly put together, and then the welding can be completed by hot pressing outside the tube membrane. This is because the hot melting temperature of the low-melting point heat-sealing layer 1a is lower than the hot melting temperature of the high-melting point anti-stretching layer 1b. When hot pressing is performed together at a suitable temperature outside the tube membrane, the adjacent low-melting point heat-sealing layers 1a are heat-sealed and welded first, and the high-melting point anti-stretching layer 1b will not be heat-sealed. Therefore, there is no need to extend into the tube for welding, and heat sealing can be performed directly outside the tube membrane. Therefore, it is not limited by the length of the tube membrane, and a very long connected tube can be processed.
[0047] More specifically, the inner diameter of the first tube body 11, the outer diameter of the relay tube 13 and the inner diameter of the first connected tube 2 are all equal, and the outer diameter of the second tube body 12 is equal to the inner diameter of the second connected tube 3. In this way, any two tubes fit closely together and are not prone to air leakage after welding.
[0048] like Figure 4The inflatable tent frame having the above-mentioned tube body connection structure is shown, and the inflatable tent frame also includes a plurality of leg air columns 4 and frame connection air columns 5, and the connection points of any three or four of the leg air columns 4 and frame connection air columns 5 are connected by the tube body connection structure. In this way, the leg air columns 4 and frame connection air columns 5 can be simply and quickly welded together by the tube body connection structure 1, simplifying the manufacturing process and reducing costs.
[0049] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.
Claims
1. A pipe connection structure, characterized in that: The invention comprises a first tube body (11) and a second tube body (12) which are connected to each other, wherein the innermost layer of the first tube body (11) is a low-melting-point heat-sealing layer (1a), and the outermost layer is a high-melting-point anti-stretching layer (1b); the innermost layer of the second tube body (12) is a high-melting-point anti-stretching layer (1b), and the outermost layer is a low-melting-point heat-sealing layer (1a), and the thermal melting temperature of the low-melting-point heat-sealing layer (1a) is lower than the thermal melting temperature of the high-melting-point anti-stretching layer (1b).
2. A pipe connection structure according to claim 1, characterized in that: The side wall of the first tube body (11) is provided with a welding opening (111), one end of the second tube body (12) is inserted into the welding opening (111), and the outermost layer of the second tube body (12) and the innermost layer of the first tube body (11) are in contact with each other so that the two can be thermally melted together.
3. A pipe connection structure according to claim 2, characterized in that: The first tube body (11) and the second tube body (12) can be flattened and then hot-pressed welded. The flattened welding port (111) is arc-shaped. After the second tube body (12) is inserted into the welding port (111), the outer wall of the second tube body (12) and the inner wall of the first tube body (11) around the welding port (111) are attached and welded together.
4. A pipe connection structure according to claim 1, characterized in that: The tube body connection structure also includes a relay tube (13), the innermost layer of the relay tube (13) is a high melting point anti-stretching layer (1b) and the outermost layer is a low melting point heat sealing layer (1a), one end of the relay tube (13) is inserted into the first tube body (11) and heat-melted together, and the other end of the relay tube (13) extends out of one end of the first tube body (11).
5. A pipe connection structure according to claim 4, characterized in that: The tube body connection structure also includes a first connected tube (2) and a second connected tube (3); the innermost layers of the first connected tube (2) and the second connected tube (3) are both low-melting-point heat-sealing layers (1a) and the outermost layers are both high-melting-point tensile-resistant layers (1b); the first connected tube (2) is sleeved on the relay tube (13) and heat-melted together; the second connected tube (3) is sleeved on the second tube body (12) and heat-melted together; and the first tube body (11), the second tube body (12), the relay tube (13), the first connected tube (2) and the second connected tube (3) can all be flattened and then heat-pressed.
6. A pipe connection structure according to claim 5, characterized in that: The inner diameter of the first tube body (11), the outer diameter of the relay tube (13) and the inner diameter of the first connected tube (2) are all equal, and the outer diameter of the second tube body (12) and the inner diameter of the second connected tube (3) are equal.
7. The pipe connection structure according to claim 1, characterized in that: The low melting point heat sealing layer (1a) is PE or PVC; the high melting point anti-stretching layer (1b) is PA or PET.
8. An inflatable tent frame having a tube connection structure according to claim 5, characterized in that: The inflatable tent frame also includes a plurality of leg air columns (4) and frame connecting air columns (5), and the connection points of any three or four of the leg air columns (4) and frame connecting air columns (5) are connected via the tube body connecting structure.
9. A pipe connection structure, characterized in that: The invention comprises a first tube body (11), a relay tube (13) and a first connected tube (2); the innermost layers of the first tube body (11) and the first connected tube (2) are both low-melting-point heat-sealing layers (1a) and the outermost layers are both high-melting-point anti-stretching layers (1b); the innermost layer of the relay tube (13) is a high-melting-point anti-stretching layer (1b) and the outermost layer is a low-melting-point heat-sealing layer (1a); one end of the relay tube (13) is inserted into the first tube body (11) and is heat-melted and welded together; the other end of the relay tube (13) extends out of one end of the first tube body (11); the first connected tube (2) is sleeved on the other end of the relay tube (13) and is heat-melted and welded together; and the first tube body (11), the relay tube (13) and the first connected tube (2) can all be flattened and then heat-pressed and welded together.
10. The pipe connection structure according to claim 9, characterized in that: The inner diameter of the first tube body (11), the outer diameter of the relay tube (13) and the inner diameter of the first connected tube (2) are all equal.
11. The pipe connection structure according to claim 9, characterized in that: The low melting point heat sealing layer (1a) is PE or PVC; the high melting point anti-stretching layer (1b) is PA or PET.
12. A pipe connection structure, characterized in that: The invention comprises a second tube body (12) and a second connected tube (3); the innermost layer of the second tube body (12) is a high melting point anti-stretching layer (1b) and the outermost layer is a low melting point heat sealing layer (1a); the innermost layer of the second connected tube (3) is a low melting point heat sealing layer (1a) and the outermost layer is a high melting point anti-stretching layer (1b); the second connected tube (3) is sleeved on the second tube body (12) and heat-melted and welded together; and the second tube body (12) and the second connected tube (3) can be flattened and then heat-pressed and welded.
13. The pipe connection structure according to claim 12, characterized in that: The outer diameter of the second tube body (12) is equal to the inner diameter of the second connected tube (3).
14. The pipe connection structure according to claim 12, characterized in that: The low melting point heat sealing layer (1a) is PE or PVC; the high melting point anti-stretching layer (1b) is PA or PET.