Liquid bag valve fixing structure

Abstract

This application relates to the field of liquid transportation technology, and more particularly to a liquid bag valve fixing structure, including a valve and an outer bag. The area of ​​the outer bag used for valve installation is defined as the installation area, which has a slit penetrating the outer bag. The outer bag has a first side and a second side, respectively. The valve extends from the first side of the outer bag through the area containing the slit to the second side, forming multiple sheet-like structures protruding towards the second side on the outer bag. The application also includes fasteners, which are fitted around the outer periphery of the sheet-like structures and apply pressure to bring them closer to the valve. This application achieves rapid valve fixing through the sheet-like structures and fasteners, thereby improving the production efficiency of liquid bags.

Description

Technical Field

[0001] This application relates to the field of liquid transportation technology, and in particular to a liquid bag valve fixing structure. Background Technology

[0002] Liquid bags, as flexible containers for liquid storage and transportation, are used in fields such as chemical raw materials, food liquids, and medical liquids. A typical liquid bag structure usually includes an inner bag and an outer bag. The inner bag directly holds the liquid, while the outer bag provides mechanical protection and load-bearing support. In practical use, to achieve liquid filling and discharging, a valve structure is usually installed on the inner bag, and a corresponding through-hole is made on the outer bag so that the valve can pass through the outer bag and connect to external pipelines, thus completing the liquid input and output operations. Since this connection directly affects the sealing performance and safety of the liquid bag, the connection structure between the valve and the outer bag becomes one of the key factors affecting the overall performance of the liquid bag.

[0003] In existing technologies, to achieve reliable fixing between the valve and the outer bag, a flange clamping structure is typically used. This involves placing flanges on both the inner and outer sides of the outer bag, and clamping the bag between the two flanges using bolts, snap-fit ​​structures, or compression mechanisms. This achieves the positioning and fixation of the valve on the outer bag. This clamping method can enhance the connection strength between the valve and the outer bag to a certain extent and improve the sealing performance of the connection. However, this type of flange structure is usually made of rigid materials and has a large overall volume. In actual installation, operators need to perform alignment and assembly operations on both the inner and outer sides of the outer bag. This not only places high demands on the operating space but also makes the assembly process relatively cumbersome, requiring multiple adjustments to ensure the coaxiality and clamping uniformity of the inner and outer flanges, resulting in low overall installation efficiency. Summary of the Invention

[0004] To address the problem of low installation efficiency in related technologies, this application provides a liquid bag valve fixing structure.

[0005] This application provides a liquid bag valve fixing structure, which adopts the following technical solution: A liquid bag valve fixing structure includes a valve and an outer bag. The area of ​​the outer bag used for installing the valve is defined as the installation area. The installation area has a slit that penetrates the outer bag. The two sides of the outer bag are a first side and a second side, respectively. The valve extends from the first side of the outer bag through the area where the slit is located to the second side of the outer bag, so that multiple sheet-like structures protruding towards the second side are formed on the outer bag. It also includes fasteners that are fitted around the outer periphery of the sheet structure and apply pressure to the sheet structure to bring it closer to the valve.

[0006] A through-cut slit is made in the installation area of ​​the outer bag, and the valve passes through the slit from the first side to the second side. This causes the outer bag material to form multiple sheet-like structures protruding towards the second side under stress, changing the traditional method of fixing relying on rigid flange clamping. During valve piercing, a through hole is formed in the installation area, thus avoiding the need for precise alignment in traditional structures and reducing assembly complexity. After formation, the sheet-like structures adhere to or abut against the outer wall of the valve, allowing the outer bag material itself to participate in the fixing process. This effectively distributes the clamping force originally concentrated on the flange to multiple sheet-like structures, thereby reducing localized stress concentration.

[0007] Furthermore, by setting fasteners around the outer periphery of the sheet structure and applying radial pressure, the sheet structure is made to fit tightly against the outer wall of the valve under pressure, forming a stable friction locking structure.

[0008] This structure eliminates the need for internal and external side operations, simplifying the installation process and improving pull-out resistance and fatigue resistance while ensuring a tight seal. Especially during liquid bag transportation under complex load conditions such as shaking and impact, the multi-piece structure's load-sharing design enhances the reliability of the connection points.

[0009] Optionally, the cut includes at least three linear cuts.

[0010] The slits are limited to at least three linear slits, and are designed to extend from the center of the mounting area outwards. This allows the valve to guide the material to fold in multiple directions as it passes through the outer bag, thereby stably forming multiple sheet-like structures. The limited length of the linear slits ensures the size of the mounting holes formed after the sheet-like structures fold. By limiting the length of the linear slits, the valve can be ensured to pass smoothly through the outer bag.

[0011] Optionally, the linear seams are set to four and distributed around the center of the installation area.

[0012] The four linear slits are arranged around the center of the installation area, creating a symmetrical sheet-like structure in the circumferential direction, thus achieving stress balance. During valve piercing, the four linear slits form four sheet-like structures, facilitating fixation to the valve from different positions.

[0013] Optionally, the fastener includes an annular structure with an adjustable radial dimension.

[0014] The fastener is designed as an adjustable radial ring structure, enabling it to simultaneously clamp multiple sheet-like structures. This structure allows the fastener to gradually contract during installation, applying controlled radial pressure to the sheet-like structures.

[0015] Optionally, the installation area is provided with at least one reinforcing layer, which is attached and fixedly connected to the outer bag, and the slit penetrates both the outer bag and the reinforcing layer.

[0016] At least one reinforcing layer is installed and fixedly connected to the outer bag to improve the overall structural strength of the installation area. The reinforcing layer enhances the load-bearing capacity of the original single-layer material, enabling it to better withstand the loads during valve installation and use.

[0017] Optionally, the reinforcing layer is a woven structure, and the two adjacent reinforcing layers are rotated at a preset angle around the axis of the valve so that the weaving directions of the two adjacent reinforcing layers are staggered.

[0018] By rotating adjacent reinforcing layers around the valve axis at a preset angle, the weaving directions of different layers are staggered, thus forming a multi-directional reinforced structure. This design ensures that the material has high strength in different directions, reducing the problem of weakness in one direction.

[0019] Optionally, the end of the linear seam furthest from the center of the installation area is provided with a tear-resistant hole.

[0020] The end of the cut is usually a stress concentration area, which is prone to crack propagation. Tear-resistant holes expand the stress-bearing area, making the stress distribution more uniform.

[0021] Optionally, the tear-resistant hole is a round hole.

[0022] By designing the anti-tear holes as circular holes with continuous, smooth boundaries, stress concentration is further reduced. Circular hole structures are easier to manufacture and offer superior stress distribution in terms of mechanical properties.

[0023] Optionally, a waterproof sleeve is also included, with one end open and covering the outside of the valve to form a sealed space.

[0024] Waterproof sleeves are installed on the outside of valves, forming a sealed space to prevent liquid from overflowing into transport vehicles or containers in the event of a leak at the valve. This is equivalent to setting up a second level of protection, improving transportation safety.

[0025] Optionally, the waterproof sleeve is made of a flexible material and is fixed synchronously with the reinforcing layer, and the end of the waterproof sleeve facing away from the reinforcing layer can be opened or closed.

[0026] The waterproof sleeve is made of flexible material and is fixed simultaneously with the reinforcing layer, ensuring both airtightness and good adaptability. Its openable or closable structure facilitates valve use and allows for easy injection or drainage of liquids.

[0027] This application has the following technical advantages: Slits are made on the surface of the liquid bag, and the valve punctures the fabric from the inside out, causing it to fold and form multiple sheet-like structures. These are then secured radially with fasteners, achieving efficient and high-strength friction anchoring. Combined with a multi-layered, interwoven reinforcing layer and tear-resistant end holes, the valve connection improves fatigue and tensile strength in multiple directions while achieving uniform stress distribution. This reduces assembly steps, improves production efficiency, and provides superior leak-proof and damage-resistant performance in heavy-duty liquid container transportation scenarios. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the application of a liquid bag valve fixing structure on a liquid bag according to an embodiment of this application.

[0029] Figure 2 This is a schematic diagram of the overall structure of a liquid bag valve fixing structure from a first angle according to an embodiment of this application.

[0030] Figure 3 This is a schematic diagram of the installation area before valve installation in a liquid bag valve fixing structure according to an embodiment of this application.

[0031] Figure 4 This is a schematic diagram of the installation area under different numbers of slits in a liquid bag valve fixing structure according to an embodiment of this application.

[0032] Figure 5 This is a schematic diagram of different shapes of anti-tear holes in a liquid bag valve fixing structure according to an embodiment of this application.

[0033] Figure 6 This is a schematic diagram of the reinforcing layer in a liquid bag valve fixing structure according to an embodiment of this application, mainly used to show the state of mutual rotation between adjacent reinforcing layers.

[0034] Figure 7 This is a schematic diagram of the waterproof sleeve in a liquid bag valve fixing structure according to an embodiment of this application.

[0035] Reference numerals: 1. Liquid bag; 11. Mounting hole; 2. Valve; 3. Mounting area; 4. Cut; 41. Linear seam; 5. Sheet structure; 51. Protrusion; 6. Fastener; 7. Reinforcing layer; 8. Tear-resistant hole; 9. Waterproof sleeve. Detailed Implementation

[0036] This application discloses a liquid bag valve fixing structure.

[0037] The valve fixing structure of the liquid bag 1 disclosed in this application is mainly used on the liquid bag 1 in various heavy-duty liquid transportation scenarios such as maritime container transportation and highway high-sided truck transportation.

[0038] It is understood that the liquid bag 1 mainly consists of an inner bag and an outer bag. The inner bag is primarily used to hold the liquid. The outer bag, fitted over the inner bag, is mainly used to strengthen the overall structural strength of the inner bag and improve stability during transportation. A valve 2 is installed on the inner bag for injecting liquid. To facilitate the connection of the valve 2 to external pipelines used for loading and unloading, a mounting hole 11 is typically provided on the outer bag corresponding to the position of the valve 2, allowing the valve 2 to extend through the mounting hole 11 to the outside of the outer bag.

[0039] Reference Figure 1 and Figure 2 The valve fixing structure provided in this embodiment is mainly used to fix the valve 2 to the outer bag, reducing the entry of the valve 2 into the outer bag, thereby avoiding inconvenience for subsequent liquid discharge or injection. For ease of description, the specific planar area on the outer bag used for installing the valve 2 is defined as the installation area 3. The side facing the liquid interior is defined as the first side, and the side exposed to the external environment is defined as the second side, with the fabric layer of the outer bag as the boundary.

[0040] Reference Figure 2 and Figure 3 In the initial static assembly state, the mounting area 3 of the outer bag is flat, and a slit 4 that runs through the entire thickness of the outer bag is pre-machined at the center of the mounting area 3. When entering the working assembly process, the valve 2 applies force from the inside to the outside from the first side of the outer bag, passes through the area where the slit 4 is located, and continues to extend to the second side of the outer bag.

[0041] Reference Figure 2 and Figure 3 Under the combined effects of the relative displacement between valve 2 and outer bag and mechanical compression, the fabric of the outer bag around the cut 4 is deformed by force, and a number of sheet-like structures 5 protruding towards the second side are formed on the outer periphery of valve 2.

[0042] Reference Figure 2 and Figure 3 The inner surface of the sheet structure 5 is attached to or abuts against the outer wall of the valve 2. The reason for saying "attached to or abutting against" is that whether the sheet structure 5 can be attached to the valve 2 depends mainly on the flexibility of the outer bag material. If the sheet structure 5 has a large hardness, then the sheet structure 5 is in a tangent state to the valve 2.

[0043] Reference Figure 2 and Figure 3To achieve final fixation between the valve 2 and the outer bag, the valve fixing structure also includes fasteners 6. These fasteners 6 are fitted around the periphery of all the sheet-like structures 5 and continuously apply normal pressure to the sheet-like structures 5 through radial contraction. Under this pressure, friction is generated between the fasteners 6, the sheet-like structures 5, and the valve 2, and they are relatively fixed together, thus achieving relative fixation between the outer bag and the valve 2. The contraction of the fasteners 6 quickly achieves fixation between the valve 2 and the outer bag, improving the efficiency of the fixation and changing the stress pattern of the installation area 3, reducing the possibility of damage to the outer bag due to flange compression.

[0044] Reference Figure 3 and Figure 4 For the slit 4, in order to allow the valve 2 to pass through smoothly and form multiple sheet-like structures 5, the slit 4 includes at least three linear slits 41. These three linear slits 41 extend outward from the center of the mounting area 3, and are distributed within a fan-shaped area greater than 180°. Thus, sheet-like structures 5 are formed between adjacent linear slits 41, and when the valve 2 passes through, the sheet-like structures 5 deform and fold, thereby fitting against the outer wall of the valve 2. To allow the valve 2 to pass smoothly through the outer bag, the circumcircle of the multiple linear slits 41 should be no smaller than the diameter of the valve 2, so that a mounting hole 11 can be formed that allows the valve 2 to pass through smoothly.

[0045] Reference Figure 3 and Figure 4 In order to improve the uniformity of force distribution after different sheet structures 5 are fixed to valve 2, multiple linear slits 41 are evenly arranged around the center of installation area 3 so that the formed sheet structures 5 have the same size, thereby improving the uniformity of force distribution on different sheet structures 5.

[0046] Reference Figure 3 and Figure 4 In this embodiment, four linear seams 41 are provided. The four linear seams 41 are arranged in a radial circumferential array starting from the center of the mounting area 3, and the included angle between two adjacent linear seams 41 is 90°, thus forming a cross-shaped structure that is perpendicular to each other on the plane. When the valve 2 passes from the first side to the second side, the outer bag fabric is subjected to force and folds outward along the four orthogonal linear seams 41, forming four fan-shaped sheet structures 5 with a central angle of 90° on the outer periphery of the valve 2.

[0047] Reference Figure 3 and Figure 4Of course, the number of linear seams 41 is not limited to four; it can also be three, five, six, or even more. However, in order to ensure the structural strength of the individual sheet structure 5 and reduce the possibility of fabric failure due to excessive cutting, the number of linear seams 41 is limited in this embodiment, specifically to 3 to 8. If the number of linear seams 41 is less than 3 (for example, only one single-line penetration seam or two L-shaped cuts 4), the valve 2 will be obstructed when passing through, and may even be unable to pass through the outer bag, let alone form a multi-directional uniform fold to achieve a circumferential closed-loop wrapping structure for the outer wall of the circular valve 2.

[0048] If the number of linear seams 41 exceeds eight, although it can significantly reduce the mechanical resistance during valve 2 puncture, the outer bag fabric will be excessively cut and fragmented, resulting in an excessively narrow circumferential width of the formed sheet structure 5. This sheet structure 5 tends to be narrow strip-shaped, and its tensile cross-sectional area at the bottom (i.e., the folded root connected to the outer bag body) will be reduced. When faced with the combined stress of axial tension and tangential shear generated by violent shaking during liquid transportation, the narrow root is prone to fatigue tearing or even overall fracture. At the same time, too many linear seams 41 will also increase the processing difficulty and cutting time. Therefore, limiting the number of linear seams 41 to the range of three to eight ensures that the folded sheet structure 5 has a sufficiently wide stress-bearing root to resist tearing, while also improving manufacturing efficiency.

[0049] Reference Figure 3 , Figure 4 and Figure 5 To prevent stress propagation on the film material and reduce stress concentration at the ends of the linear seams 41, each linear seam 41 is die-cut with a tear-resistant hole 8 at its end furthest from the center of the mounting area 3. The tear-resistant hole 8 has a closed, smooth profile, which eliminates the stress concentration effect at the tip by increasing the stress-bearing area, thus preventing fatigue tearing of the outer bag under long-term vibration.

[0050] Reference Figure 3 , Figure 4 and Figure 5 In this embodiment, the tear-resistant hole 8 is a circular hole to facilitate manufacturing and processing. Of course, in other embodiments, it can also be other holes with smooth contours, such as elliptical, polygonal, etc.

[0051] Reference Figure 2 , Figure 4 and Figure 5After the tear-resistant hole 8 is cut, two protrusions 51 are formed on both sides of the length of the sheet structure 5. After the valve 2 is fixed to the outer bag, the fastener 6 is located on the side of the protrusions 51 closer to the outer bag. Due to the elasticity of the sheet structure 5 itself, it tends to flatten out at the position where the sheet structure 5 is not in contact with the fastener 6, so that the two protrusions can be located outside the inner wall of the fastener 6, thereby limiting the sheet structure 5 to a certain extent, preventing the sheet structure 5 from detaching from the fastener 6 and the valve 2, and improving the stability of the outer bag after it is fixed to the valve 2.

[0052] Reference Figure 1 and Figure 2 The outer bag is made of high-tensile-strength polypropylene (PP) or polyethylene (PE) industrial woven fabric to withstand the hydrostatic pressure and dynamic impact of several tons of liquid. To further improve the structural strength of the installation area 3, at least one reinforcing layer 7 is provided inside the installation area 3. The reinforcing layer 7 is made of the same polypropylene material as the outer bag and is fixedly and irremovably bonded to the inner or outer side of the outer bag through a hot-pressing composite process.

[0053] Reference Figure 1 and Figure 2 During the molding process, the cut 4 is made by punching through the outer bag and the reinforced layer 7 at the same time, ensuring that the folding and wrapping actions of the two are completely synchronized.

[0054] Reference Figure 2 and Figure 6 To ensure more uniform structural strength in different directions within the installation area 3, this embodiment sets a preset angle for rotation between adjacent reinforcing layers 7 around the central axis of the valve 2. This precise spatial angular misalignment causes the fiber weaving directions of adjacent reinforcing layers 7 to interweave and complement each other, forming an isotropic matrix in space, thereby resisting tearing stress from multiple directions such as radial and tangential. It can be understood that the preset angle essentially defines the weaving direction of the reinforcing layer 7. The description here of rotating the two reinforcing layers 7 around the central axis of the valve 2 by a preset angle is based on two identical reinforcing layers 7. Of course, in some embodiments, the cutting direction can also be controlled at the moment the reinforcing layer 7 is cut. Taking a square reinforcing layer 7 as an example, when the first reinforcing layer 7 is cut, the weaving direction is perpendicular to the edge of the reinforcing layer 7 (which can also be understood as the cutting path or cutting line). When the second reinforcing layer 7 is cut, the edge of the reinforcing layer 7 forms a preset angle with the weaving direction.

[0055] Reference Figure 2 and Figure 6To improve the uniformity of structural strength in different directions of the installation area 3, it is understood that the braiding structure of the reinforcing layer 7 mainly includes transverse braided fibers and longitudinal braided fibers, which are perpendicular to each other. Therefore, when one of the two reinforcing layers 7 is rotated 90°, it can coincide with the other reinforcing layer 7. Thus, the braiding directions of the multiple reinforcing layers 7 should be evenly distributed within a 90° range. Of course, in some other embodiments, the braiding structure of the reinforcing layers 7 is different, and the distribution range of the braiding directions of the multiple reinforcing layers 7 should also be adjusted.

[0056] Reference Figure 2 and Figure 6 Regarding the preset angle range, in this embodiment it is set between (15°, 90°). It can be understood that the smaller the preset angle, the denser the warp and weft fibers of adjacent reinforcing layers 7 become in space. This provides excellent interception of tear stress in multiple directions and enhances the fatigue strength of the cut edge 4. However, a smaller angle also requires more reinforcing layers 7 to ensure uniform structural strength in all directions of the mounting area 3. For example, at 15°, at least 90 / 15 = 6 reinforcing layers 7 are needed to ensure uniform structural strength in multiple directions around the entire circumference. This could lead to material waste and excessive thickness of the mounting area 3.

[0057] For example, the preset angle can be set to 30° or 45°. Taking 45° as an example, this angle setting achieves a uniform distribution of the woven fibers in eight directions, thereby transforming the installation area 3 from an anisotropic material into a near-isotropic composite structure. In this state, regardless of which direction the liquid inside the liquid bag 1 drifts due to inertia, the connection between the valve 2 and the outer bag can provide constant and uniform tear resistance.

[0058] Reference Figure 2 Fastener 6 is an adjustable radial ring structure. In this embodiment, fastener 6 is a metal hose clamp (ICEY German-style hose clamp). It uses a worm gear screw drive mechanism to adjust the circumference diameter of the steel belt, and has high radial locking force and fatigue resistance. It consists of a drive belt with external thread grooves and an adjusting bolt. After the valve 2 completes the piercing action and supports the plate structure 5, the operator puts the hose clamp, which is in the initial state of maximum opening, onto the outside of the plate structure 5, and then uses a tool to tighten the adjusting bolt. Under the threaded engagement drive, the circumference of the metal ring gradually shortens, and the radial dimension of the ring structure continuously decreases, generating a uniform and continuously increasing radial preload on the internal plate structure 5. Under this shrinkage interference fit constraint, the gap of the woven fabric in the plate structure 5 is completely compacted and anchored to the outer wall of the valve 2.

[0059] Reference Figure 2In other embodiments, fastener 6 may be a high-strength retaining rope (not shown in the figure). The retaining rope is made of Kevlar fiber or ultra-high molecular weight polyethylene (UHMWPE) fiber, which has high tensile strength and is resistant to chemical corrosion. During assembly, the retaining rope is wound around the outer periphery of the sheet structure 5 multiple times and pre-tightened by a slip knot or a knot. Due to the rope's good flexibility, it can more perfectly conform to the non-circular folded surface of the sheet structure 5, thereby achieving a more uniform pressure distribution.

[0060] Reference Figure 7 The valve 2 is covered with a waterproof sleeve 9, which is open at one end and covers the outside of the valve 2 to form a sealed space. During transportation, if liquid leaks from the valve 2 or the location of the liquid bag 1 corresponding to the valve 2, the waterproof sleeve 9 can prevent the liquid from flowing into the container or carriage.

[0061] Reference Figure 7 In this embodiment, the waterproof sleeve 9 is made of a flexible material, such as polyethylene, and has an overall cylindrical structure. One end of the sleeve is fitted over the outside of the valve 2 and is heat-fused to the reinforcing layer 7 to fix the waterproof sleeve 9. In one embodiment, the waterproof sleeve 9 can be directly heat-fused between adjacent reinforcing layers 7 or onto the surface of the outermost reinforcing layer 7 during the connection process. Alternatively, it can be glued to the reinforcing layer 7 after it has been fixed. Of course, in other embodiments, the waterproof sleeve 9 is not limited to a cylindrical flexible material; it can also be a rigid material, as long as it can form a sealed space outside the valve.

[0062] Reference Figure 7 Because the waterproof sleeve 9 is made of a cylindrical material, liquid can be injected into or discharged from the valve body through it. During actual transportation, the end of the waterproof sleeve 9 furthest from the reinforcing layer 7 can be tied to achieve a seal. Alternatively, the other end of the waterproof sleeve 9 can be sealed by binding or other methods.

[0063] The principle of the valve fixing structure for a liquid bag 1 disclosed in this application is as follows: The valve 2 is used to puncture the fabric, causing it to fold outwards to form multiple sheet-like structures 5. These are combined with multiple layers of reinforced layers 7 stacked at staggered angles to achieve stress dispersion. This solves the problem of stress concentration and easy breakage at traditional edge seams, significantly improves the ultimate pull-out resistance and fatigue life of the valve 2 connection, simplifies the operation steps for fixing the valve 2 to the outer bag, facilitates the fixing of the valve 2 to the outer bag, and improves the overall production efficiency of the liquid bag 1.

[0064] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A liquid bag valve fixing structure, comprising a valve (2) and an outer bag, characterized in that, The area of ​​the outer bag used for installing the valve (2) is defined as the installation area (3), and the installation area (3) is provided with a slit (4) that penetrates the outer bag; the two sides of the outer bag are the first side and the second side, respectively. The valve (2) extends from the first side of the outer bag through the area where the slit (4) is located to the second side of the outer bag, so that multiple sheet-like structures (5) protruding towards the second side are formed on the outer bag. It also includes a fastener (6) which is fitted around the outer periphery of the sheet structure (5) and applies pressure to the sheet structure (5) to bring it close to the valve (2).

2. The liquid bag valve fixing structure according to claim 1, characterized in that, The cut (4) includes at least three linear cuts (41).

3. The liquid bag valve fixing structure according to claim 2, characterized in that, The linear seams (41) are set to four and distributed around the center of the mounting area (3).

4. The liquid bag valve fixing structure according to claim 1, characterized in that, The fastener (6) includes an annular structure with an adjustable radial dimension.

5. The liquid bag valve fixing structure according to claim 1, characterized in that, The installation area (3) is provided with at least one reinforcing layer (7), which is attached and fixedly connected to the outer bag, and the slit (4) penetrates both the outer bag and the reinforcing layer (7).

6. The liquid bag valve fixing structure according to claim 5, characterized in that, The reinforcing layer (7) is a woven structure. The two adjacent reinforcing layers (7) are rotated at a preset angle around the axis of the valve (2) so that the weaving directions of the two adjacent reinforcing layers (7) are staggered.

7. The liquid bag valve fixing structure according to claim 2, characterized in that, The linear seam (41) has a tear-resistant hole (8) at the end away from the center of the installation area (3).

8. The liquid bag valve fixing structure according to claim 7, characterized in that, The tear-resistant hole (8) is a round hole.

9. The liquid bag valve fixing structure according to claim 5, characterized in that, It also includes a waterproof sleeve (9), one end of which is open and covers the outside of the valve (2) to form a sealed space.

10. A liquid bag valve fixing structure according to claim 9, characterized in that, The waterproof sleeve (9) is made of flexible material and is fixed synchronously with the reinforcing layer (7). The end of the waterproof sleeve (9) away from the reinforcing layer (7) can be opened or closed.

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