High-pressure air rib soft bottom plugging structure

Abstract

The invention relates to a high-pressure air rib soft bottom plugging structure, an air rib is a composite braided tube formed by steam heat sealing of an inner membrane and an outer braided tube, the plugging structure comprises two inner bottom tubes, an inner bottom circle and an outer bottom circle, and the two inner bottom tubes are arranged on the inner sides of the two ends of the composite braided tube respectively and welded to the composite braided tube in the circumferential direction; the two inner bottom circles are arranged at the outer ends of the two inner bottom pipes correspondingly and welded to the ends of the inner bottom pipes in the circumferential direction, and the two outer bottom circles are arranged at the two ends of the composite braided pipe correspondingly and connected with the ends of the composite braided pipe in a sewn mode in the circumferential direction. Through the arrangement of the annular plugging surface and the soft plugging structure, the air rib can keep the original cylindrical shape, and all parts of the plugging surface are uniformly stressed, so that air leakage is not easy to occur.

Description

Technical Field

[0001] The invention relates to a high-pressure gas rib soft bottom sealing structure, and belongs to the field of high-pressure airtight product sealing technology. Background Art

[0002] Most of the existing high-pressure airtight air ribs are sealed with metal clamps, which are costly. For example, patent CN202320993104.1 discloses a high-pressure air rib fixing tool. The tool adopts two relatively arranged plywood to be installed and assembled to form a cavity in the middle to accommodate the air rib column foot. The end faces between the two plywood are used to clamp the air rib column foot for sealing. Since the air rib is generally cylindrical, the existing clamp structure of this type can only pinch the air rib into a plane and then seal it, which changes the original shape of the air rib, resulting in the air rib tube corresponding to the middle position of the sealing plane being stretched more than the two end positions. Therefore, the strength of the middle part is lower than that of the two ends, and it is under greater pressure, and it is easy to detach from the clamp and leak. Summary of the Invention

[0003] In order to solve the problems existing in the prior art, the present invention provides a sealing structure with a ring-shaped sealing surface that can maintain the original shape of the gas rib.

[0004] In order to achieve the above-mentioned purpose, the technical solution proposed in the present invention is: a high-pressure air rib soft bottom sealing structure, the air rib is a composite braided tube formed by steam heat-sealing an inner membrane and an outer braided tube, the sealing structure includes an inner bottom tube, an inner bottom circle and an outer bottom circle, the two inner bottom tubes are respectively arranged on the inner sides of the two ends of the composite braided tube and are circumferentially welded to the composite braided tube, the two inner bottom circles are respectively arranged at the outer ends of the two inner bottom tubes and are circumferentially welded to the ends of the inner bottom tubes, and the two outer bottom circles are respectively arranged at the two ends of the composite braided tube and are circumferentially sutured to the ends of the composite braided tube.

[0005] The outer side wall of the inner bottom tube is fitted with the inner side wall of the composite braided tube, and the outer side wall of the inner bottom tube and the inner side wall of the composite braided tube are provided with at least one circumferentially arranged welding portion along the axial direction.

[0006] The inner bottom circle includes an inner disc matching the diameter of the inner bottom tube and an inner annular side bent outward along the circumference of the inner disc. The inner wall of the inner bottom tube end is attached to and welded to the outer wall of the inner annular side.

[0007] The end of the inner bottom tube passes over the outer end of the inner annular side and bends inward, so that the inner wall of the inner bottom tube end is attached to and welded with the outer wall and inner wall of the inner annular side.

[0008] The outer bottom circle includes an outer disc matching the diameter of the composite braided tube and an outer annular side edge bent outward along the circumference of the outer disc. The inner wall of the end of the composite braided tube is attached to and sutured to the outer wall of the outer annular side edge.

[0009] The end of the composite braided tube passes over the outer end of the outer annular side and bends inward, so that the inner wall of the end of the composite braided tube is attached to and sutured with the outer wall and inner wall of the outer annular side.

[0010] The outer braided tube and the outer bottom circle are both made of high molecular weight polyethylene materials, and the inner film, the inner bottom tube and the inner bottom circle are all made of TPU films.

[0011] When setting up the sealing structure, first place the inner bottom pipe in the composite braided pipe, and use a 12KW high-frequency welding machine to weld the inner bottom pipe and the composite braided pipe, then use a 5KW high-frequency welding machine to weld the inner bottom circle and the inner bottom pipe, and finally use a high-platform machine to sew the composite braided pipe and the outer bottom circle.

[0012] Compared with the prior art, the present invention has the following advantages: The high-pressure air rib soft bottom sealing structure of the present invention is provided with inner bottom tubes at both ends of the air rib, and the inner bottom tube and the air rib are welded along the circumferential direction, and then an inner bottom circle is provided at the outer end of the inner bottom tube and the inner bottom tube and the inner bottom circle are welded along the circumferential direction. The inner bottom circle can keep the air rib in its original cylindrical shape. At the same time, the two sealing surfaces are both annular, and the pressure at each position of the sealing surface is uniform, and local leakage due to uneven pressure is not easy to occur; and since the inner bottom tube and the two bottom circles are both made of soft materials, the sealing structure is a soft bottom sealing, which can further ensure that the force is uniform at each location, so that the product after sealing has high pressure resistance, long pressure holding time and sufficient rigidity.

[0013] The present invention provides an outer bottom circle at the end of the composite braided tube of the air rib, which can protect the inner bottom tube and the inner bottom circle inside. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG1 is a three-dimensional cross-sectional view of a high-pressure gas rib soft bottom plugging structure according to the present invention; FIG2 is a cross-sectional view of a high-pressure gas rib soft bottom plugging structure according to the present invention; Figure 3 This is a three-dimensional schematic diagram of the high-pressure gas rib soft bottom plugging structure of the present invention; Figure 4 for Figure 3 The main view; Figure 5 for Figure 3 A top view of Figure 6 This is a processing flow chart of the high-pressure gas rib soft bottom plugging structure of the present invention.

[0015] In the figure: 1-composite braided tube, 2-inner bottom tube, 3-inner bottom circle, 4-outer bottom circle, 5-welding part 1, 6-welding part 2, 7-sewing part. DETAILED DESCRIPTION

[0016] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Example 1

[0017] like Figure 1 and Figure 2 As shown, the high-pressure air rib soft bottom sealing structure of this embodiment, wherein the air rib is a composite braided tube 1 formed by steam heat-sealing an inner membrane and an outer braided tube, and the sealing structure for sealing the air rib includes an inner bottom tube 2, an inner bottom circle 3 and an outer bottom circle 4. In this embodiment, the materials of the outer braided tube and the outer bottom circle 4 are both high molecular polyethylene materials, and the materials of the inner membrane, inner bottom tube 2 and inner bottom circle 3 are all TPU films.

[0018] Combine Figure 3 and Figure 4 As shown, the two inner bottom tubes 2 are respectively arranged on the inner sides of the two ends of the composite braided tube 1, and the size matches the size of the composite braided tube 1. Both are cylindrical, so that the outer wall of the inner bottom tube 2 fits with the inner wall of the composite braided tube 1. At the same time, a welding portion 5 arranged along the circumferential direction is provided on the outer wall of the inner bottom tube 2 and the inner wall of the composite braided tube 1, that is, an annular sealing surface is formed. In this embodiment, two or more annular sealing surfaces can also be axially arranged along the outer wall of the inner bottom tube 2 and the inner wall of the composite braided tube 1 to enhance the sealing effect.

[0019] The two inner bottom circles 3 are respectively arranged at the outer ends of the two inner bottom tubes 2, that is, the end of the outer bottom tube 2 opposite to the end of the composite braided tube 1. The inner bottom circle 3 includes an inner disc matching the diameter of the inner bottom tube 2 and an inner annular side bent outward along the circumference of the inner disc. The inner wall of the end of the inner bottom tube 2 is bonded and welded to the outer wall of the inner annular side to form another annular sealing surface.

[0020] In this embodiment, the end of the inner bottom tube 2 passes over the outer end of the inner annular side and bends inward, so that part of the inner wall of the end of the inner bottom tube fits with the outer wall of the inner annular side, and the inner wall of the bent part fits with the inner wall of the inner annular side. Both fitting places are welded to enhance the sealing effect.

[0021] Combine Figure 5 As shown, two outer bottom circles 4 are respectively provided at both ends of the composite braided tube 1 and outside the inner bottom circle 3, and are used to protect the inner bottom circle 3 and the inner bottom tube 2 of the membrane structure. The outer bottom circle 4 includes an outer disc that matches the diameter of the composite braided tube 1 and an outer annular side that is bent outward along the circumference of the outer disc. The inner wall of the end of the composite braided tube 1 is affixed to the outer wall of the outer annular side and sutured. In this embodiment, the end of the composite braided tube 1 can also pass over the outer end of the outer annular side and bend inward, so that the inner wall of the end of the composite braided tube is affixed to the outer wall of the outer annular side, and the inner wall of the bent portion is affixed to the inner wall of the outer annular side, and the three-layer structure is sutured and connected.

[0022] In this embodiment, the annular sealing surface and the soft sealing structure enable the gas rib to maintain its original columnar shape, and ensure that the force is evenly distributed on the sealing surface, making it less likely to leak. Example 2

[0023] like Figure 6 As shown, this embodiment is a method for processing the gas rib soft bottom plugging structure described in the embodiment. The process steps are as follows: 1. Cut the required materials to length and position them, and then test them. If qualified, they will enter the production workshop to proceed to the next step; if unqualified, they will be reworked; 2. Punch holes in the composite braided tube to reserve the gas nozzle installation hole; 3. Install the gas nozzle base; 4. Install the gas nozzle valve; 5. Use a 12KW high-frequency welding machine to circumferentially weld the inner bottom tube and the composite braided tube to ensure that there is no air leakage at the weld; 6. Use a 5KW high-frequency welding machine to circumferentially weld the inner bottom circle to the inner bottom tube to ensure that there is no air leakage around the weld; 7. Perform an airtightness test. If qualified, continue to the next step; if unqualified, rework will be carried out; 8. Use a high-pressure machine to sew the composite braided tube and the outer bottom circle together. This produces a lightweight, fast, and simple high-pressure gas rib with high pressure resistance and long-term pressure retention.

[0024] The above process involves the following equipment, see Table 1.

[0025] Table 1 List of main equipment Serial number Device Name use 1 Rhino System design 2 CAD system typesetting 3 Hot knife Cutting, cutting, punching 4 12KW high frequency welding machine Tube membrane and tube sleeve welding 5 5KW high frequency welding machine Tubular membrane bottom seal 6 High-table sewing machine Pipe sleeve bottom seal 7 barometer test 8 air compressor Inflation test Among them, the 12KW high-frequency welding machine and the 5KW high-frequency welding machine are important process equipment in this process. The equipment parameters involved are as follows: Table 2, Table 3.

[0026] Table 2 12KW high frequency process parameters Knife model number Mold closing time Ground delay High-frequency current Welding time Cooldown Rise time 30mm horizontal knife die 3s 1.5s 2A 10S 10s 2S

[0027] Table 3 5KW high frequency process parameters Knife model number Mold closing time Ground delay High-frequency current Welding time 150mm circular die 3s 1.5s 2A 6S 10mm horizontal knife die 3s 1.5s 2A 6S The air ribs obtained in this embodiment meet the lightweight requirements of most products, have high pressure resistance, long-term pressure retention, and strong bearing capacity.

[0028] The technical solutions of the present invention are not limited to the above-mentioned embodiments, and any technical solutions obtained by equivalent replacement methods fall within the scope of protection required by the present invention.

Claims

1. A high-pressure gas rib soft bottom plugging structure, wherein the gas rib is a composite braided tube formed by steam heat-sealing an inner membrane and an outer braided tube, characterized in that: The sealing structure includes an inner bottom tube, an inner bottom circle and an outer bottom circle. The two inner bottom tubes are respectively arranged on the inner sides of the two ends of the composite braided tube and are circumferentially welded to the composite braided tube. The two inner bottom circles are respectively arranged at the outer ends of the two inner bottom tubes and are circumferentially welded to the ends of the inner bottom tubes. The two outer bottom circles are respectively arranged at the two ends of the composite braided tube and are circumferentially sutured to the ends of the composite braided tube.

2. The high-pressure gas rib soft bottom plugging structure according to claim 1, characterized in that: The outer side wall of the inner bottom tube is fitted with the inner side wall of the composite braided tube, and the outer side wall of the inner bottom tube and the inner side wall of the composite braided tube are provided with at least one circumferentially arranged welding portion along the axial direction.

3. The high-pressure gas rib soft bottom plugging structure according to claim 2, characterized in that: The inner bottom circle includes an inner disc matching the diameter of the inner bottom tube and an inner annular side bent outward along the circumference of the inner disc. The inner wall of the inner bottom tube end is attached to and welded to the outer wall of the inner annular side.

4. The high-pressure gas rib soft bottom plugging structure according to claim 3, characterized in that: The end of the inner bottom tube passes over the outer end of the inner annular side and bends inward, so that the inner wall of the inner bottom tube end is attached to and welded with the outer wall and inner wall of the inner annular side.

5. The high-pressure gas rib soft bottom plugging structure according to claim 4, characterized in that: The outer bottom circle includes an outer disc matching the diameter of the composite braided tube and an outer annular side edge bent outward along the circumference of the outer disc. The inner wall of the end of the composite braided tube is attached to and sutured to the outer wall of the outer annular side edge.

6. The high-pressure gas rib soft bottom plugging structure according to claim 5, characterized in that: The end of the composite braided tube passes over the outer end of the outer annular side and bends inward, so that the inner wall of the end of the composite braided tube is attached to and sutured with the outer wall and inner wall of the outer annular side.

7. The high-pressure gas rib soft bottom plugging structure according to any one of claims 1 to 6, characterized in that: The outer braided tube and the outer bottom circle are both made of high molecular weight polyethylene materials, and the inner film, the inner bottom tube and the inner bottom circle are all made of TPU films.

8. The high-pressure gas rib soft bottom plugging structure according to claim 7, characterized in that: When setting up the sealing structure, first place the inner bottom pipe in the composite braided pipe, and use a 12KW high-frequency welding machine to weld the inner bottom pipe and the composite braided pipe, then use a 5KW high-frequency welding machine to weld the inner bottom circle and the inner bottom pipe, and finally use a high-platform machine to sew the composite braided pipe and the outer bottom circle.

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