Internal water passing structure of composite material double-cavity air cylinder

Abstract

The utility model is suitable for the technical field of double-cavity air cylinders, and particularly relates to a composite material double-cavity air cylinder internal water passing structure which comprises a first composite outer shell and a second composite outer shell, and the opening end face of the first composite outer shell and the opening end face of the second composite outer shell are connected in a hot melting welding mode. A first airtight lining layer is arranged in the first composite outer shell. According to the utility model, the water passing sheet main bodies are arranged at the joint of the first composite outer shell and the second composite outer shell and the joint of the first airtight lining layer and the second airtight lining layer, so that the technical problems that the internal structure is blocked and condensed water cannot be completely discharged due to overflow of welding flux in the welding process of a traditional air cylinder are effectively solved. In the welding process, due to the existence of the water passing piece main body, excessive accumulation of welding flux at the connecting position is prevented, the flatness of the welding surface is ensured, the welding flux is prevented from being accumulated to form a water blocking interlayer, and therefore it is guaranteed that condensate water can be drained smoothly.

Description

Technical Field

[0001] The utility model relates to the technical field of double - chamber air storage cylinders, in particular to a water - passing structure inside a composite double - chamber air storage cylinder. Background Technique

[0002] A double - chamber air storage cylinder is a gas storage device widely used in the automotive field, usually used for storing high - pressure gases. The air storage cylinder is composed of two composite outer shells, and the inner layer is sealed with an airtight inner lining to ensure good pressure resistance and airtight performance in a high - pressure environment. As an efficient and reliable connection method, hot - melt welding is widely used in the production and manufacturing of double - chamber air storage cylinders. Hot - melt welding heats the contact surface of the outer shell and the airtight inner lining layer, melts the materials and combines them together to form a firm welded joint. This welding method can achieve a high - strength welding effect in a short time, ensuring the stability of the air storage cylinder in a high - pressure and high - strength use environment.

[0003] However, although hot - melt welding has excellent welding strength and sealing performance, in the prior art, it also causes some technical problems. Due to the melting and flowing of materials during the welding process, the solder often accumulates excessively at the welding connection, especially on the inner wall of the air storage cylinder. These accumulations will form obstacles, resulting in the insufficient drainage of the condensate water inside the air storage cylinder. During long - term use, the accumulation of condensate water will exacerbate the internal corrosion, affecting the service life and safety of the air storage cylinder, and even affecting the airtight performance of the air storage cylinder. Therefore, how to solve the drainage problem caused by solder accumulation while maintaining the high - strength advantage of hot - melt welding has become a difficult problem to be solved in the current technology. Summary of the Utility Model

[0004] The purpose of the embodiment of the utility model is to provide a water - passing structure inside a composite double - chamber air storage cylinder, aiming to solve the technical problems mentioned in the background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A water - passing structure inside a composite double - chamber air storage cylinder includes a first composite outer shell and a second composite outer shell, and the open end faces of the first composite outer shell and the second composite outer shell are connected by hot - melt welding. A first airtight inner lining layer is arranged inside the first composite outer shell, and a second airtight inner lining layer is arranged inside the second composite outer shell. The open end faces of the first airtight inner lining layer and the second airtight inner lining layer are connected by hot - melt welding. Support ribs are arranged inside both the first composite outer shell and the first airtight inner lining layer, and positioning blocks are arranged on the surface of the support ribs;

[0007] At the connection between the first composite outer casing and the second composite outer casing, and at the connection between the first airtight inner lining layer and the second airtight inner lining layer, a water passage sheet body is provided. A positioning hole is provided in the middle area of the surface of the water passage sheet body, and water passage channels are formed by bending both sides of the surface of the water passage sheet body.

[0008] Furthermore, the positioning block is of a T-shaped structure, and the positioning block stably limits the water passage sheet body at the connection between the first composite outer casing and the second composite outer casing or at the connection between the first airtight inner lining layer and the second airtight inner lining layer by being stuck between the two water passage channels.

[0009] Furthermore, a positioning bulge is provided in the middle area of the surface of the water passage sheet body. When the positioning block is stuck between the two water passage channels, the positioning block is in interference fit with the positioning bulge and tightly abuts against the surface of the positioning bulge.

[0010] Furthermore, a first welding surface is jointly formed by the open end faces of the first composite outer casing and the second composite outer casing; a second welding surface is jointly formed by the open end faces of the first airtight inner lining layer and the second airtight inner lining layer;

[0011] The two water passage sheet bodies are respectively in contact with the first welding surface and the second welding surface, and the positioning holes provided on the two water passage sheet bodies correspond to the positions of the first welding surface or the second welding surface respectively.

[0012] Furthermore, the surface of the water passage sheet body has a curvature, and the curvature of the surface of the water passage sheet body is adapted to the inner curvature of the first composite outer casing or the first airtight inner lining layer.

[0013] Furthermore, the thickness range of the water passage sheet body is 0.2 - 1 mm.

[0014] A water passage structure inside a composite material double-chamber air storage cylinder provided by the present utility model has the following beneficial effects:

[0015] By providing a water passage sheet body at the connection between the first composite outer casing and the second composite outer casing and at the connection between the first airtight inner lining layer and the second airtight inner lining layer, the technical problems of internal structure blockage caused by solder overflow and incomplete drainage of condensed water during the welding process of a traditional air storage cylinder are effectively solved. During the welding process, the presence of the water passage sheet body prevents excessive accumulation of solder at the connection, ensures the flatness of the welding surface, and avoids the formation of a water-blocking barrier layer due to solder accumulation, thereby ensuring that the condensed water can be discharged smoothly.

[0016] The positioning holes on the surface of the water-passing piece are used to accurately position the water-passing piece to prevent it from shifting during welding. The positioning holes cooperate with the positioning blocks to keep the water-passing piece stable during welding, avoiding structural shifting caused by high temperature and pressure during welding. At the same time, the two sides of the water-passing piece are bent to form water channels to ensure that condensed water can be discharged smoothly, improve the drainage efficiency of the gas cylinder, and avoid corrosion problems caused by accumulation of condensed water.

[0017] This design not only solves the stability problem of the water-passing piece during welding through a precise positioning structure, but also improves the drainage function inside the gas cylinder through a reasonable structural design, significantly improving the overall reliability and service life of the gas cylinder. This utility model ensures the excellent performance of air tightness, stability and drainage effect inside the gas cylinder in a high-pressure and long-term use environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of a first composite outer shell and a second composite outer shell in the internal water-passing structure of a composite material double-chamber air storage cylinder after welding.

[0019] Figure 2 It is a front view of a first composite outer shell and a second composite outer shell in a water-passing structure inside a composite double-chamber air storage cylinder after welding.

[0020] Figure 3 The present invention is a schematic structural diagram of a first composite outer shell and a second composite outer shell in a water-passing structure inside a composite double-chamber air storage cylinder in a separated state.

[0021] Figure 4 A composite material double-chamber air storage cylinder with internal water flow structure Figure 3 Enlarged view of point A.

[0022] Figure 5 The present invention is a schematic structural diagram of a first composite outer shell and a first airtight inner lining layer in an internal water-permeable structure of a composite material double-chamber air storage cylinder.

[0023] Figure 6 A composite material double-chamber air storage cylinder with internal water flow structure Figure 5 Enlarged view of point B.

[0024] Figure 7 It is a schematic diagram of the attached surface structure of the water-passing plate main body in the internal water-passing structure of a composite material double-cavity air storage cylinder.

[0025] Figure 8 It is a schematic diagram of the upward structure of the water-passing plate main body in the internal water-passing structure of a composite material double-cavity air storage cylinder.

[0026] In the figure: 1. First composite outer shell; 2. Second composite outer shell; 3. First airtight inner lining layer; 4. Second airtight inner lining layer; 5. Positioning block; 6. Main body of water-passing sheet; 7. Positioning hole; 8. Water-passing channel; 9. Positioning bulge; 10. First welding surface; 11. Support rib. Detailed implementation mode

[0027] In order to make the purpose, technical solution and advantages of the present utility model clearer, the following further details the present utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0028] The following details the specific implementation of the present utility model in conjunction with specific embodiments.

[0029] As Figures 1 - 8 As shown, a water-passing structure inside a composite material double-chamber air storage cylinder provided by an embodiment of the present utility model includes a first composite outer shell 1 and a second composite outer shell 2, and the open end faces of the first composite outer shell 1 and the second composite outer shell 2 are connected by a hot-melt welding method. A first airtight inner lining layer 3 is arranged inside the first composite outer shell 1, a second airtight inner lining layer 4 is arranged inside the second composite outer shell 2, and the open end faces of the first airtight inner lining layer 3 and the second airtight inner lining layer 4 are connected by a hot-melt welding method.

[0030] A double-chamber air storage cylinder is a gas storage device composed of two independent outer shells, with advantages such as a compact structure and light weight. It forms a sealed double-chamber structure by connecting two composite outer shells through a welding method. This design can not only store different gases but also improve the pressure resistance and airtightness of the air storage cylinder.

[0031] In the structure of the double-chamber air storage cylinder, the first composite outer shell 1 and the second composite outer shell 2 constitute the external framework of the air storage cylinder. The open end faces of the two are connected by a hot-melt welding method to ensure the integrity and airtightness of the structure. To further improve the gas storage performance, a first airtight inner lining layer 3 and a second airtight inner lining layer 4 are respectively arranged inside the outer shells. These inner lining layers play a role in sealing and protection, and can effectively prevent gas leakage by closely fitting with the outer shells.

[0032] The first composite outer shell 1 and the second composite outer shell 2 are not only structurally connected to each other but also closely combined with their respective airtight inner lining layers. The first airtight inner lining layer 3 and the second airtight inner lining layer 4 are jointly welded with the open end faces of the outer shells to keep the gas inside the air storage cylinder sealed. The open end faces of the first airtight inner lining layer 3 and the second airtight inner lining layer 4 are also connected by a hot-melt welding method to form a complete inner cavity system, enabling the gas to be reliably stored in the double chambers.

[0033] Hot melt welding is a commonly used welding technique that heats the contact surface of materials to a molten state using high temperature and makes them fuse with each other under pressure, forming a firm bond after cooling. In the double-chamber air storage cylinder, the open end faces of the first composite outer shell 1 and the second composite outer shell 2 are connected by hot melt welding, and the welded structure has high strength and good sealing performance.

[0034] However, during the hot melt welding process, due to the melting and overflow of materials, a water-blocking layer with a certain thickness (3 - 5 mm) may be formed at the welding joint. This layer will cause protrusions inside the welding area, hindering the complete drainage of condensed water from the bottom of the air storage cylinder, especially in the lowest point area of the air storage cylinder. Since the condensed water cannot be fully drained, it may affect the overall performance of the air storage cylinder and increase the internal corrosion risk, especially during long-term use. This problem needs to be optimized by taking appropriate measures in the design to ensure the drainage function of the air storage cylinder.

[0035] Support ribs 11 are provided inside both the first composite outer shell 1 and the first airtight inner lining layer 3, and positioning blocks 5 are provided on the surfaces of the support ribs 11.

[0036] Water-passing sheet bodies 6 are provided at the joints of the first composite outer shell 1 and the second composite outer shell 2, and at the joints of the first airtight inner lining layer 3 and the second airtight inner lining layer 4. The surface of the water-passing sheet body 6 has a curvature, and the curvature of the surface of the water-passing sheet body 6 is adapted to the inner curvature of the first composite outer shell 1 or the first airtight inner lining layer 3.

[0037] A positioning hole 7 is provided in the middle area of the surface of the water-passing sheet body 6, and water-passing channels 8 are formed by bending both sides of the surface of the water-passing sheet body 6.

[0038] The positioning block 5 has a T-shaped structure, and the positioning block 5 stably limits the water-passing sheet body 6 at the joint of the first composite outer shell 1 and the second composite outer shell 2 or at the joint of the first airtight inner lining layer 3 and the second airtight inner lining layer 4 by being stuck between the two water-passing channels 8.

[0039] The open end faces of the first composite outer shell 1 and the second composite outer shell 2 together form a first welding surface 10, and the open end faces of the first airtight inner lining layer 3 and the second airtight inner lining layer 4 together form a second welding surface.

[0040] The two water-passing sheet bodies 6 are respectively in contact with the first welding surface 10 and the second welding surface, and the positioning holes 7 provided on the two water-passing sheet bodies 6 correspond to the positions of the first welding surface 10 or the second welding surface respectively.

[0041] In an embodiment of the present utility model, the internal water - passing structure of the air storage cylinder, through the precise cooperation of multiple components, not only ensures smooth drainage inside the air storage cylinder but also effectively avoids the problem of solder bulging during the welding process, thereby enhancing the stability of the overall structure.

[0042] First of all, support ribs 11 are provided inside both the first composite outer shell 1 and the first airtight inner lining layer 3. These support ribs provide support inside the air storage cylinder to prevent the air storage cylinder from deforming under high pressure. In addition, positioning blocks 5 are equipped on the surface of the support ribs. The positioning blocks with a T - shaped structure play a limiting role by being stuck between two water - passing channels 8, accurately positioning the water - passing sheet body 6 at the connection of the first composite outer shell 1 and the second composite outer shell 2, or at the connection of the first airtight inner lining layer 3 and the second airtight inner lining layer 4.

[0043] During the welding process, the open ends of the first composite outer shell 1 and the second composite outer shell 2 form a first welding surface 10 through hot - melt welding, and the open ends of the first airtight inner lining layer 3 and the second airtight inner lining layer 4 also form a second welding surface through hot - melt welding. Usually during welding, due to the melting of materials, the welding area will bulge, resulting in an obstruction inside the air storage cylinder and affecting drainage. However, under the limiting action of the positioning blocks, the water - passing sheet body 6 is located at the welding surface. The design of the water - passing sheet body 6 ensures that it can effectively prevent excessive accumulation of solder during welding. Specifically, the presence of the water - passing sheet body 6 prevents the bulge of the welding area caused by solder overflow during the welding process, thereby avoiding the formation of a partition layer that would block the discharge of condensed water. This design ensures the smoothness of the drainage channel inside the air storage cylinder, enabling condensed water to be discharged smoothly and improving the drainage effect of the product.

[0044] More beneficially, since the positioning holes 7 on the water - passing sheet body 6 are hollow, during the welding process, the overflowing solder can partially enter the inside of the positioning holes 7. This not only does not affect the drainage function but also further helps to fix the water - passing sheet body 6 through the process of solder entering the positioning holes 7, making it more stable. After the overflowing solder enters the positioning holes 7, it can firmly lock the water - passing sheet body 6 in the welding position, avoiding loosening or displacement after welding. This design effectively enhances the overall connection strength between the water - passing sheet body 6 and the air storage cylinder, ensuring the stability and sealing performance of the entire air storage cylinder after welding.

[0045] In addition, the surface of the water - passing sheet body 6 has a design that matches the internal curvature of the air storage cylinder. Its curvature is adapted to the inner curvature of the first composite outer shell 1 or the first airtight inner lining layer 3, ensuring that the water - passing sheet body 6 can closely fit the internal structure of the air storage cylinder. This fitting design enables the water - passing sheet body 6 to always remain in the optimal position during the welding process and will not be displaced due to thermal expansion or material flow during welding, further ensuring the welding accuracy and the use effect of the product.

[0046] In summary, through precise structural design, the water - passing sheet body 6 can not only block the excess protrusions of the welding material, but also, due to its hollow structure, allow the solder to enter the positioning holes 7, further stabilizing the water - passing sheet body 6. This design effectively solves the problem of internal protrusions that may occur during the welding process, ensures the water - passing function of the air storage cylinder and the stability of the overall structure, thus achieving excellent drainage effects and product durability.

[0047] In this embodiment, a positioning boss 9 is provided in the middle area of the surface of the water - passing sheet body 6. When the positioning block 5 is stuck between the two water - passing channels 8, the positioning block 5 has an interference fit with the positioning boss 9 and tightly abuts against the surface of the positioning boss 9. The advantages of this design are mainly reflected in aspects such as stability, positioning accuracy, and the reliability of the overall structure after welding.

[0048] Through the interference fit between the positioning boss 9 and the positioning block 5, the stable positioning of the water - passing sheet body 6 during and after the welding process is ensured. The interference fit means that the combination of the two is tight, which can effectively prevent the water - passing sheet body 6 from shifting or loosening due to external forces or welding thermal stress during the welding process. This tight fit significantly improves the installation stability of the water - passing sheet body 6 and prevents it from shaking or falling off during long - term use.

[0049] Through the cooperation between the positioning block 5 and the positioning boss 9, the water - passing sheet body 6 can be accurately fixed in a predetermined position for pre - welding assembly, especially between the two water - passing channels 8. This precise positioning is crucial for ensuring the smooth drainage channel inside the air storage cylinder and avoiding problems such as poor drainage caused by installation deviation. This design ensures that during welding, the water - passing sheet can accurately contact the welding surface, reducing errors.

[0050] During the welding process, the interference fit between the positioning block 5 and the positioning boss 9 can not only prevent displacement caused by thermal expansion, but also provide stable support at the welding part. This helps to control the flow of the welding material, avoid the formation of solder accumulation near the water - passing sheet body 6, thus maintaining the flatness of the welding surface and ensuring the smooth discharge of condensed water. Through this design, the welding quality has been effectively improved.

[0051] This interference - fit design also enhances the strength of the overall structure. The water - passing sheet body 6 is tightly embedded in the connection part between the first composite outer shell 1 and the second composite outer shell 2, improving the connection firmness and sealing performance of the entire air storage cylinder. This design not only improves the pressure - resistance and impact - resistance of the air storage cylinder, but also extends the service life of the product, ensuring its stability and reliability in a high - pressure environment.

[0052] Through this precise interference fit design, the water-passing plate structure of the air cylinder is not only firmly fixed, but also effectively avoids the problem of solder accumulation during the welding process, maintaining the drainage function and structural strength of the air cylinder, and ensuring its performance stability in long-term use.

[0053] In this embodiment, the thickness of the water-permeable sheet body 6 is in the range of 0.2-1 mm. This thickness design brings about multiple beneficial effects.

[0054] First, the thickness of the water-permeable sheet is between 0.2-1mm, ensuring that it can provide sufficient strength and rigidity inside the gas cylinder to prevent deformation or rupture under high pressure. This thickness range can keep the water-permeable sheet lightweight while being able to withstand the pressure inside the gas cylinder and the thermal stress during welding.

[0055] Secondly, this thickness design enables the water-permeable sheet body 6 to be smoothly integrated into the welding structure of the gas storage cylinder, especially during welding, its thickness can effectively prevent the overflow of solder at the welding point without excessively increasing the thickness of the welding area. After welding, the water-permeable sheet body 6 can form a tightly fitting structure with the first composite outer shell 1 and the second composite outer shell 2, avoiding the accumulation of excess solder inside, thereby maintaining the flatness of the welding surface.

[0056] In addition, the thickness of 0.2-1 mm also makes the main body of the water-permeable sheet have a certain flexibility, which can adapt to the curvature change inside the gas storage cylinder. Whether it is adapted to the inner curvature of the first composite outer shell 1 or the first airtight lining layer 3, the water-permeable sheet can maintain a good fitting effect. Such a design not only helps to ensure the sealing inside the gas storage cylinder, but also will not cause displacement or loosening problems due to thermal expansion and contraction during long-term use.

[0057] In general, the thickness of the water-permeable sheet body 6 is in the range of 0.2-1 mm, which balances strength, rigidity and flexibility, ensuring that it has good pressure resistance and welding adaptability inside the gas cylinder, while maintaining good drainage function and stability for long-term use.

[0058] The water-passing sheet body 6 and the positioning block 5 are usually made of materials with high strength, excellent heat resistance and corrosion resistance, such as reinforced plastics or composite materials. These materials have good mechanical strength, can maintain a stable shape under high pressure environment, and are not easy to deform or break. In addition, their heat resistance ensures that they can withstand the high welding temperature without melting or structural damage during the welding process, thereby ensuring that the water-passing sheet and the positioning block remain accurately positioned during the welding process.

[0059] This material also has good corrosion resistance. Especially in the case where the inside of the air storage cylinder may come into contact with condensed water or other gases, it will not be chemically eroded, extending the service life of the entire structure. In addition, the enhanced plastic or composite material has the characteristic of light weight, reducing the overall weight of the air storage cylinder and contributing to improving the economy and convenience of use of the product.

[0060] By using this high-performance material, the water-passing piece main body 6 and the positioning block 5 can not only maintain the structural integrity under high-pressure and high-temperature conditions, but also significantly improve the durability and reliability of the air storage cylinder, while ensuring the long-term effectiveness of the fixing effect of the water-passing piece and the drainage function.

[0061] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An internal water-passing structure of a composite double-chamber air storage cylinder, comprising a first composite outer shell (1) and a second composite outer shell (2), and the open end faces of the first composite outer shell (1) and the second composite outer shell (2) are connected by a hot-melt welding method. A first airtight inner lining layer (3) is arranged inside the first composite outer shell (1), and a second airtight inner lining layer (4) is arranged inside the second composite outer shell (2). The open end faces of the first airtight inner lining layer (3) and the second airtight inner lining layer (4) are connected by a hot-melt welding method. It is characterized in that, Support ribs (11) are provided inside both the first composite outer shell (1) and the first airtight inner lining layer (3), and positioning blocks (5) are provided on the surface of the support ribs (11). Water - passing sheet bodies (6) are provided at the joints of the first composite outer shell (1) and the second composite outer shell (2), and at the joints of the first airtight inner lining layer (3) and the second airtight inner lining layer (4). A positioning hole (7) is provided in the middle area of the surface of the water - passing sheet body (6), and water - passing channels (8) are formed by bending both sides of the surface of the water - passing sheet body (6).

2. The internal water-passing structure of a composite double-chamber gas storage cylinder according to claim 1, wherein The positioning block (5) has a T - shaped structure, and the positioning block (5) stably limits the water - passing sheet body (6) at the joint of the first composite outer shell (1) and the second composite outer shell (2) or at the joint of the first airtight inner lining layer (3) and the second airtight inner lining layer (4) by being stuck between the two water - passing channels (8).

3. The internal water-passing structure of a composite double-chamber gas storage cylinder according to claim 2, characterized in that, A positioning bulge (9) is provided in the middle area of the surface of the water - passing sheet body (6). When the positioning block (5) is stuck between the two water - passing channels (8), the positioning block (5) is in interference fit with the positioning bulge (9) and tightly abuts against the surface of the positioning bulge (9).

4. The internal water-passing structure of a composite double-chamber gas storage cylinder according to claim 1, characterized in that, The open end faces of the first composite outer shell (1) and the second composite outer shell (2) jointly form a first welding surface (10), and the open end faces of the first airtight inner lining layer (3) and the second airtight inner lining layer (4) jointly form a second welding surface. The two water - passing sheet bodies (6) are respectively in contact with the first welding surface (10) and the second welding surface, and the positioning holes (7) provided on the two water - passing sheet bodies (6) correspond to the positions of the first welding surface (10) or the second welding surface respectively.

5. The internal water-passing structure of a composite double-chamber gas storage cylinder according to claim 1, characterized in that, The surface of the water - passing sheet body (6) has a curvature, and the curvature of the surface of the water - passing sheet body (6) is adapted to the inner curvature of the first composite outer shell (1) or the first airtight inner lining layer (3).

6. The internal water-passing structure of a composite double-chamber gas storage cylinder according to claim 1, characterized in that, The thickness range of the water - passing sheet body (6) is 0.2 - 1 mm.

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