Composite dual chamber air reservoir

Abstract

The application provides a high-voltage reinforced composite double-cavity air cylinder, which comprises an outer cavity and an inner cavity, and the inner cavity is arranged in the inner part of the outer cavity, wherein after independent and simultaneous inflation, the outer cavity and the inner cavity are mutually impacted and pressed, and the application meets the double-cavity requirement, reduces the layout space of multiple single cavities of a whole vehicle and reduces the cost and weight.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of brake braking of commercial vehicles, and particularly relates to a high-pressure-resistant reinforced composite double-cavity air cylinder. BACKGROUND

[0002] The air cylinder is an important energy storage component in the brake and whistle systems of an automobile, which can store the air compressed by an air compressor and release the air flow with high energy when needed, so as to meet the working requirements of the brake and whistle systems.

[0003] As shown in the prior art, the existing air cylinder is generally in a three-segment form of a middle shell plus end shells at both ends of the middle shell. Figure 1 The end shells and the middle shell are connected through welding ribs, and after welding, the inside of the entire air cylinder is divided into a large cavity in the middle shell and a small cavity in the end shells. This kind of air cylinder causes the large and small cavities to be divided into left and right, and the pressure-bearing capacity of the two ends of the large and small cavities is the same, but the reinforcing ribs in the middle are not connected together.

[0004] Therefore, it is necessary to design a high-pressure-resistant reinforced composite double-cavity air cylinder to solve the above technical problems. SUMMARY

[0005] In view of the above problems, the application provides a high-pressure-resistant reinforced composite double-cavity air cylinder.

[0006] Further, the outer cavity is the space part between the two main shells of the air cylinder after being connected, and the space part between the two inner cavity cylinders of the air cylinder after being connected.

[0007] The inner cavity is the space part formed after the two inner cavity cylinders are connected and the two inner cavity cylinder connecting end covers are connected.

[0008] Further, the two inner cavity cylinders are connected through a connecting structure, and the two inner cavity cylinders and the two main shells are integrally injection molded.

[0009] Further, the end cover comprises a cover body, a cover top and a sealing element, the cover body is polygonal, and the cover top is integrally injection molded with the cover body.

[0010] The center of the cover top is provided with a connecting hole, the sealing piece is in T shape, the bottom of the sealing piece is connected with the connecting hole, the inside of the bottom of the sealing piece is provided with a first internal threaded hole, and the first internal threaded hole is in communication with a stepped hole formed in the end of the sealing piece.

[0011] The inside of the end cover is provided with a plurality of uniformly distributed reinforcing structures, wherein the reinforcing structures are in thermal plug connection with the circumferential inner surface of the cover body and the connecting hole.

[0012] Further, the reinforcing structure comprises a first Y-shaped reinforcing rib, wherein

[0013] The main branch end of the first Y-shaped reinforcing rib is connected with the circumferential outer surface of the connecting hole, the branch end of the first Y-shaped reinforcing rib is connected with the circumferential inner surface of the cover body, and the top of the first Y-shaped reinforcing rib is connected with the inner wall of the cover top.

[0014] Further, the outer edge of the outer port of the connecting hole is in polygonal shape, the outer surface of the cover top is provided with a polygonal reinforcing rib, the polygonal reinforcing rib surrounds the outer periphery of the upper port of the connecting hole, the polygonal reinforcing rib radially has a plurality of first strip-shaped reinforcing ribs inward, the polygonal reinforcing rib radially has a plurality of second strip-shaped reinforcing ribs outward and a plurality of three-claw reinforcing ribs, and the plurality of three-claw reinforcing ribs and the plurality of second strip-shaped reinforcing ribs are staggered.

[0015] Further, one of the main housings is in injection molding thermal plug connection with a first water drain valve and a second water drain valve, the first water drain valve is in communication with the outer cavity, and the second water drain valve is in communication with the inner cavity.

[0016] Further, the inner wall of one end of the inner cavity cylinder is provided with a plurality of reinforcing rib strips.

[0017] Further, the outer wall of the other end of the inner cavity cylinder is further provided with an inner reinforcing rib between the corresponding main housing.

[0018] Further, the gas storage cylinder is a composite engineering material, that is, a special reinforced nylon composite material, and comprises the following materials in parts by weight: nylon base material, glass fiber, compatibility agent, lubricant and stabilizer.

[0019] The application has the following beneficial effects:

[0020] The gas storage cylinder is divided into four housings, two large housings (main housings) and two small housings (end covers), the whole gas storage cylinder is divided into an inner cavity and an outer cavity through corresponding welding connection (the inner cavity can be used to meet the parking brake and auxiliary gas storage, and the outer cavity can be used to meet the service brake gas storage), the strength is improved, the double-cavity requirement is met, the space for arranging multiple single-cavity vehicles is reduced, and the cost and weight are reduced.

[0021] Additional features and advantages of the present application will be set forth in the description that follows, and in part will be apparent from the description, or can be learned by practice of the application. The objectives and other advantages of the present application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0023] Figure 1 A schematic diagram of a gas cylinder structure according to the prior art is shown.

[0024] Figure 2 A schematic diagram of a gas cylinder structure according to an embodiment of the present application is shown.

[0025] Figure 3 A schematic diagram of a gas cylinder structure according to an embodiment of the present application is shown. Figure 2 A partial cross-sectional schematic diagram of a gas cylinder is shown.

[0026] Figure 4 A schematic diagram of a gas cylinder structure according to an embodiment of the present application is shown. Figure 2 A simple explosion diagram of a gas cylinder is shown.

[0027] Figure 5 A partial cross-sectional diagram of an end cover according to an embodiment of the present application is shown.

[0028] Figure 6 A schematic diagram of an end cover structure with a polygonal reinforcing rib according to an embodiment of the present application is shown.

[0029] Figure 7 A schematic diagram of a corresponding end cover welded gas cylinder partial structure according to an embodiment of the present application is shown. Figure 6 A schematic diagram of a corresponding end cover welded gas cylinder partial structure according to an embodiment of the present application is shown.

[0030] Figure 8 A schematic diagram of an inner groove structure according to an embodiment of the present application is shown.

[0031] Figure 9 A schematic diagram of an inner ring structure according to an embodiment of the present application is shown.

[0032] Figure 10 A schematic diagram of a water drain groove structure according to an embodiment of the present application is shown.

[0033] Figure 11 A schematic diagram of a water drain groove structure according to an embodiment of the present application is shown. Figure 10 A partial schematic diagram of a water drain groove structure according to an embodiment of the present application is shown.

[0034] Figure 12 A schematic diagram of the structure of a sheet metal bracket according to an embodiment of the present invention is shown.

[0035] Figure 13 A schematic diagram of the internal structure of the end cap according to an embodiment of the present invention is shown.

[0036] Figure 14 It shows according to Figure 4 A schematic diagram of the structure at point A in the middle.

[0037] Figure 15 A schematic diagram of a second modified structure of the gas storage tank structure according to an embodiment of the present invention is shown.

[0038] Figure 16 A schematic diagram of the structure of two inner cylinders locked together by three nuts in the middle is shown according to an embodiment of the present invention.

[0039] Figure 17 A schematic diagram of a third transformation structure of the gas storage cylinder structure according to an embodiment of the present invention is shown.

[0040] Figure 18 It shows according to Figure 17 A schematic diagram of the structure at point B. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] like Figures 2-18 As shown, the present invention provides a high pressure-resistant reinforced composite material dual-cavity gas storage cylinder, the gas storage cylinder including an outer cavity 22 and an inner cavity 21, the inner cavity 21 being located inside the outer cavity 22. The inner cavity 21 and the outer cavity 22 are independent cavities. Therefore, the large cavity and small cavity in the present invention are separated into inner and outer sections, which can enhance the overall pressure-bearing strength of the gas storage cylinder.

[0043] In some embodiments of the present invention, the outer cavity 22 (i.e., the large cavity, the diameter of which is relatively smaller and the strength is increased) is the space between the two main shells 1 of the gas storage cylinder connected together and the two inner cavity cylinders 2 of the gas storage cylinder connected together; the inner cavity 21 (i.e., the small cavity) is the space formed after the two inner cavity cylinders 2 are connected and the connecting end caps of the two inner cavity cylinders 2 are installed, wherein the two inner cavity cylinders 2 are interconnected.

[0044] Wherein, after the outer cavity 22 and the inner cavity 21 are independently and simultaneously inflated, the outer cavity 22 and the inner cavity 21 counteract each other (e.g., Figure 3 (As shown by the arrows in the upper and lower rows), this can improve the pressure resistance of the small cavity, and even if the cavity wall is thin, it can still meet the pressure resistance requirements. At the same time, it can reduce the radial radius of the cavities (large and small cavities) compared to the old structure, reduce circumferential and axial stress, and improve pressure resistance (according to national / international pressure vessel calculation standards). ,in, Where is the circumferential stress, P is the ultimate bearing capacity, D is the radial radius, and T is the matrix wall thickness. (The smaller the better). Furthermore, in this invention, the volume of the cavity is increased compared to the traditional small cavity.

[0045] In some embodiments of the present invention, the two inner cavity cylinders 2 are connected by a connecting structure, and the two inner cavity cylinders 2 and the two main shells 1 are integrally injection molded. The large cavity welding shown in the figure has only one welded closure in the middle; the rest of the structure is integrally injection molded. Compared to the old structure, the radial radius of the large cavity is reduced and the number of closed openings is reduced, greatly improving the overall pressure resistance.

[0046] In this invention, the small cavity is sealed in three places (the sealing between the inner cavity cylinder 2 and the inner cavity cylinder 2 in the middle, and the sealing between the two end caps 4 and the two inner cavity cylinders 2). However, compared with the traditional small cavity, the diameter of the small cavity in this invention is smaller, the axial and circumferential stress is reduced when under pressure, the welding width at the sealing point is increased, the overall welding area is reduced compared with the old structure, the overall expansion coefficient is reduced, and the welding stress is reduced. Through analysis, the overall stress is concentrated at the small-sized end caps, and the overall optimization of the end caps is very high and well controlled.

[0047] In this invention, the end cap 4 of the small cavity is connected by welding. Through ingenious structural design and simulation analysis, the stress is ultimately concentrated at the end cap 4. However, the end cap 4 is small, making design optimization and modification convenient, which greatly improves the ease of product optimization and improvement.

[0048] In some embodiments of the present invention, such as Figure 5 As shown, the end cap 4 includes a cap body 41, a cap top 42, and a sealing element 43. The cap body 41 is polygonal (exemplarily, a nonagonal shape). The polygonal shape increases strength and reduces internal stress. The cap top 42 is integrally injection molded with the cap body 41. A connecting hole 421 is provided at the center of the cap top 42. The sealing element 43 is T-shaped or other special irregular shape. The bottom of the sealing element 43 is connected to the connecting hole 421 (the connection method is heat-insertion connection or fusion connection, etc.). The bottom of the sealing element 43 is provided with a first internal threaded hole 422. The first internal threaded hole 422 communicates with the stepped hole 423 opened at the end of the sealing element 43.

[0049] In some embodiments of the present application, as shown in Figure 5 The inner part of the end cover 4 is provided with a plurality of uniformly distributed reinforcing structures, wherein the reinforcing structures are connected with the inner circumferential surface of the cover body 41 and the thermal plug connection hole 421.

[0050] In some embodiments of the present application, the reinforcing structures include a first Y-shaped reinforcing rib 432, wherein the main branch end of the first Y-shaped reinforcing rib 432 is connected with the outer circumferential surface of the connection hole 421, and the branch end of the first Y-shaped reinforcing rib 432 is connected with the inner circumferential surface of the cover body 41; the top of the first Y-shaped reinforcing rib 432 is connected with the inner wall of the cover top 42.

[0051] In some embodiments of the present application, the outer edge 4211 of the outer port of the connection hole 421 is polygonal, the outer surface of the cover top 42 is provided with a polygonal reinforcing rib 424, the polygonal reinforcing rib 424 surrounds the outer periphery of the outer port of the connection hole 421, the polygonal reinforcing rib 424 internally radiates a plurality of first strip-shaped reinforcing ribs 425, the polygonal reinforcing rib 424 externally radiates a plurality of second strip-shaped reinforcing ribs 426 and a plurality of three-prong reinforcing ribs 427, and the plurality of three-prong reinforcing ribs 427 and the plurality of second strip-shaped reinforcing ribs 426 are arranged alternately.

[0052] In some embodiments of the present application, as shown in Figure 4 Unlike the structure shown in Figure 6 The outer surface of the cover top 42 is not provided with the polygonal reinforcing rib 424 and the second strip-shaped reinforcing rib 426, but only externally radiates a plurality of first strip-shaped reinforcing ribs 425 and a plurality of three-prong reinforcing ribs 427 from the connection hole 421, and the plurality of three-prong reinforcing ribs 427 and the plurality of first strip-shaped reinforcing ribs 425 are arranged alternately.

[0053] In some embodiments of the present application, as shown in Figure 4 The one end surface of the inner cavity cylinder 2 is flush with the one end surface of the main shell 1, and the other end surface of the inner cavity cylinder 2 is integrally injection molded with the other end surface of the main shell 1.

[0054] Therefore, as shown in Figure 8 When the end cover 4 is welded with the corresponding main shell 1, the other end surface of the corresponding main shell is provided with an inner groove 412, the inner groove 412 is provided with a protruding ring 413, the inner wall of the bottom of the end cover 4 is hot melt welded with the inner wall of the inner groove 412, the bottom of the end cover 4 is provided with a connecting ring 414, and the connecting ring 414 can be hot melt welded with the protruding ring 413.

[0055] In addition, after the end cover 4 is welded with the corresponding main shell 1, the upper part of the exhaust groove 411 is communicated with the inner cavity 21, and the lower part of the exhaust groove 411 is communicated with the gap between the convex ring 413 and the inner wall of the inner groove 412 in an intermittent and continuous manner. In the present application, the connection strength of the bottom inner side of the end cover 4 and the main shell 1 is improved through heat fusion welding (i.e. surface heating), and the welding residual heat is used to heat the zero-to-zero surface when welding through the zero-to-zero structure (i.e. the structure in which the two welding surfaces are tightly attached to each other when the two parts are welded), so as to ensure that the pressure-resistant connection strength is increased and the plastic strain and stress are reduced when bearing pressure, thereby increasing the overall pressure-resistant supporting strength.

[0056] In some embodiments of the present application, as shown in Figure 4 wherein the first drain valve 12 and the second drain valve 13 are inserted into one of the main shells 1, the first drain valve 12 is communicated with the outer cavity 22, and the second drain valve 13 is communicated with the inner cavity 21. The first drain valve 12 and the second drain valve 13 are metal or other material inserts, which are pre-embedded or embedded after injection molding. The metal inserts are not pre-embedded but embedded after injection molding, so as to eliminate the problems of "floc-like" pores, insufficient filling, and non-dense injection molding caused by the inconsistent thermal expansion coefficients of two different materials during injection molding, thereby improving the injection molding efficiency and the overall production efficiency.

[0057] In some embodiments of the present application, as shown in Figure 7 the connecting hole 421 provided at the center of the cover top 42 can also be a metal insert, which is formed through hot insertion after injection molding, as shown in Figure 7 wherein a is an air inlet and outlet connecting interface (communicated with the large cavity), and b is a pressure sensor connecting interface (communicated with the large cavity).

[0058] In some embodiments of the present application, the inner cavity cylinder 2 is further provided with an inner reinforcing rib 27 between one end of the outer wall of the end and the corresponding main shell 1, as shown in Figure 9 the connecting mechanism provided at one end of the inner cavity cylinder 2 is an inner ring 32 (a reinforcing rib), which is strengthened in width to enhance the structural strength, reduce the stress, improve the welding strength, prevent injection deformation, and improve the overall strength and supporting strength during welding. In the present application, the inner ring 32 is a nine-edged welding structure, which enhances the structural strength, increases the welding area, reduces the stress structure, and improves the overall pressure-resistant strength. The two inner rings 32 in the two inner cavity cylinders 2 are welded, so that the two inner cavity cylinders 2 are welded and connected.

[0059] And in the present application, the inner cavity cylinder 2 is also provided with a nine-sided structure, and a plurality of reinforcing ribs 33 are arranged on the inner wall of the other end of the inner cavity cylinder 2 (3 reinforcing ribs on each side of the inner cavity cylinder 2, a total of 9 sides), and the reinforcing ribs 33 arranged on the inner wall of the other end of the nine-sided inner cavity cylinder 2, thereby enhancing the structural strength, reducing the internal stress structure, and improving the welding quality.

[0060] And in the present application, the main shell 1 can also be provided with a petal structure, and a first reinforcing mechanism can be arranged between the main shell 1 and the inner cavity cylinder, the first reinforcing mechanism comprising a plurality of reinforcing ribs 31 (exemplarily, 9 reinforcing ribs), wherein the 9 reinforcing ribs 31 are uniformly connected to the outer wall of the inner cavity cylinder 2 and the inner wall of the main shell 1 (the 9 reinforcing ribs 31 are two-end arc transition tension rib structures, which enhance the structural strength and reduce the stress effect). The purpose of the reinforcing ribs arranged on the outer wall of the main shell and the inner cavity cylinder 2 by one-piece injection molding is to play a role of “pulling” the support shell strength and “tensioning” the main shell shrinkage support force structure when under pressure, thereby enhancing the overall pressure-bearing structural strength, reducing the internal stress structure, and improving the overall pressure resistance.

[0061] As shown in Figure 18 , a drainage structure can be added, that is, a drainage hole 26 (arranged on the inner ring 32) is arranged on the welding surface (between the inner rings 32) to drain water, so that the blocked water (blocked by the inner ring 32) can be drained through the second water drain valve 13. In addition, the inner shell of the inner ring 32 is provided with reinforcing ribs to prevent injection deformation and improve the overall strength and support strength during welding.

[0062] In some embodiments of the present application, as shown in Figure 10 and Figure 11 ( Figure 11 is a partial enlarged view of Figure 10 ), to ensure that the small cavity is clean, the water drain groove 211 (communicating with the small cavity, mainly to drain the water vapor condensed in the small cavity) is designed ingeniously to enhance the structural strength and meet the water drain requirement.

[0063] In some embodiments of the present application, as shown in Figure 15 , the connection mode between the inner cavity cylinder 2 and the inner cavity cylinder 2 can not only be welding, but also be a bolt interlocking structure, that is, the two inner cavity cylinders 2 in the middle are locked by three nuts (two to multiple) and three bolts as shown in Figure 16 , which can improve the pressure-bearing capacity of the product.

[0064] The middle small cavity, that is, the connection structure of the inner cavity 21 formed by welding between the two inner cavity cylinders 2, participates in welding to enhance the axial and circumferential strength and improve the pressure resistance, but if the middle small cavity does not have sufficient welding strength, the reinforcing structure can be changed to bolt connection, for exampleFigure 16 As shown, the end face of the inner cavity cylinder 2 is in a closed form, but a communication hole 23 is also provided at the center of the end face of the inner cavity cylinder 2, and a bolt hole 24 is also provided in the end face of the inner cavity cylinder 2, so that the two inner cavity cylinders 2 can be connected by using nuts and bolts through the bolt hole 24, and the two inner cavity cylinders 2 can be communicated through the communication hole 23.

[0065] In addition, if the welding strength of the middle small cavity is not enough, the following connection structures can also be used: glue bonding, pre-embedded metal and then bolt connection, plug-in self-locking structure connection, external lock connection, and intermediate pull ring locking connection, and the like, which will not be described here.

[0066] In some embodiments of the present application, the holes corresponding to the drain valves (the first drain valve 12 and the second drain valve 13) and the pressure sensor connection interface are all increased with a "cross" rib to ensure the strength.

[0067] In some embodiments of the present application, in the above welding form, the welding between one of the main housings 1 and the other main housing 1 can be connected by using a fusion welding method, which includes but is not limited to vibration friction welding, hot plate welding, infrared welding, light beam welding, hot melt welding, and laser welding, and the like. In the above welding form, the welding between the main housing 1 and the end cover 4 can be connected by using a fusion welding method, which includes but is not limited to vibration friction welding, hot plate welding, infrared welding, light beam welding, hot melt welding, and laser welding, and the like. In some embodiments of the present application, as shown in Figure 4 As shown, the end face of the inner cavity cylinder 2 is flush with the end face of the main housing 1, and the other end face of the inner cavity cylinder 2 is integrally injection molded with the other end face of the main housing 1.

[0068] In some embodiments of the present application, since the two main housings 1 are connected by welding, and the two end covers 4 are respectively connected to the two main housings 1 by welding, the weak point of the gas cylinder is at the position of the end cover, so the end cover is designed in the form of a double Y-shaped reinforcing rib structure (described below), and the stress of the side wall of the cover body 41 (i.e. the nine-hedron inner surface of the cover body 41) of the end cover 4 is conducted on the double Y-shaped reinforcing rib structure.

[0069] Therefore, the strength of the end cover can be improved, and the improvement method can refer to Figure 13 As shown in

[0070] In some embodiments of the present application, the second reinforcing mechanism 43 includes a connecting column 431 and a plurality of (for example, as shown in Figure 139 groups in the present application, but it should be understood that the number of reinforcing structures in the present application is not limited to 9 groups according to the needs.

[0071] In some embodiments of the present application, the specific structure of the reinforcing structure is as follows:

[0072] The reinforcing structure comprises first Y-shaped reinforcing ribs 432, and each branch end of the first Y-shaped reinforcing rib 432 is integrally injection molded with a second Y-shaped reinforcing rib 433, wherein

[0073] The main branch end of the first Y-shaped reinforcing rib 432 is connected with the circumferential outer surface of the connecting column 431, the branch part of the first Y-shaped reinforcing rib 432 is connected with the circumferential inner surface of the cover body 41, and the branch end of the second reinforcing rib 31 is not connected with the circumferential inner surface of the cover body 41.

[0074] The top of the first Y-shaped reinforcing rib 432 and the second Y-shaped reinforcing rib 433 is connected with the inner wall of the cover top 42.

[0075] In some embodiments of the present application, the reinforcing structure also has a single Y-shaped reinforcing rib structure as shown in Figure 4 and Figure 14 There is no second Y-shaped reinforcing rib 433 in the single Y-shaped reinforcing rib structure. Figure 13

[0076] In addition, no matter whether it is Figure 13 or Figure 14 The reinforcing structure, one end of the connecting column 431 extends to the inner wall of the cover top 42 and is integrally injection molded with the circumferential inner surface of the cover body 41 and the connecting column 431.

[0077] Since the gas pressure in the gas cylinder under normal circumstances will be much higher than the normal atmospheric pressure, which puts higher requirements on the structural strength of the gas cylinder itself. The current mainstream method for lightening the gas cylinder is to replace the traditional steel material with plastic material. However, due to the influence of its own physical and chemical properties, the structural strength of the plastic gas cylinder produced by most manufacturers cannot meet the normal use requirements, or the production cost is too high to achieve mass production, so that few composite plastic gas cylinders for cars can be seen on the market. Therefore, in an embodiment of the present application, the two main housings 1, the two end covers 4, the inner cavity cylinder 2, the first reinforcing mechanism 3 and the second reinforcing mechanism 43 are all made of engineering plastic material. This material has good toughness and tensile strength, can effectively resist the internal pressure of the entire gas cylinder 1 (including the pressure of the outer cavity and the inner cavity), and greatly delays the aging of the gas cylinder 1, such as the aging of the inner cavity and the outer cavity of the gas cylinder.

[0078] ​In addition, in some embodiments of the present application, for the structure of the gas cylinder, there are the following ways:

[0079] As Figure 4 shown Figure 4 , only schematic diagram, in use, Figure 4 the nut mounting seat 11 in the figure is downward), in order to let the water more smoothly out, Figure 4 , the nut mounting seat (each main shell 1 outer surface is provided with nut mounting seat 11, for example, each main shell 1 outer surface has 2 nut mounting seat 11) shown in the figure is set to high and low two states (for example Figure 4 the two nut mounting seat 11 on the left is lower Figure 4 , the two nut mounting seat 11 on the right in the figure), so that the gas cylinder is installed in the inclined state (after the inclination, the height difference can be 3.5mm, after the inclination installation, one end is higher than the other end by 0.8°), the water can flow smoothly from one side to the drain valve 12 and the drain valve 13 (one of the main shell 1 is provided with the first drain valve 12 and the second drain valve 13, the first drain valve 12 is communicated with the outer cavity, and the second drain valve 13 is communicated with the inner cavity) position, thereby discharging, the water in the outer cavity can be discharged through the first drain valve 12, and the water in the inner cavity can be discharged through the second drain valve 13.

[0080] And based on Figure 4 the whole gas cylinder, as Figure 12 shown, the upper installation surface of the metal support 5 (the metal support 5 is installed at both ends of the vehicle frame to support the whole gas cylinder) installed on the main shell 1 is made into an inclined surface (circle), to ensure that one end is higher than the other end by 3.5mm, and the water flows to the corresponding drain valve of the other end small cavity.

[0081] In addition, in some embodiments of the present application, the gas cylinder composite engineering material is a special material for the product, the composite engineering material is mainly based on nylon, the respective advantages of high molecular materials are combined to make up for each other, and the base material, glass fiber, fusion agent, lubricant and stabilizer are improved and innovated, the mechanical properties of the gas cylinder composite material are improved, the dimensional stability of the product injection molding is ensured, the heat resistance, cold resistance and cold and hot impact resistance of the gas cylinder are ensured, the resistance to various chemicals, light aging and good UV resistance are ensured, the weather resistance is met, the welding and blasting pressure resistance performance is improved, the gas cylinder composite engineering material of the present application can replace aluminum material, the material cost of the gas cylinder is reduced, the composite engineering material is a special reinforced nylon composite material for the product, which comprises the following materials in weight parts: nylon base material 20-100 parts, glass fiber 30-50 parts, compatible agent 1-8 parts, lubricant 1-12 parts, and stabilizer 1-10 parts. The special reinforced nylon composite material uses the respective advantages of high molecular materials to improve and innovate, so as to meet the weather resistance and improve the welding and blasting pressure resistance performance.

[0082] In summary, the gas cylinder in the application has the following advantages:

[0083] 1. Divided into four shells, two large shells (main shell 1) and two small shells (end cap 4), connected by corresponding welding, the entire gas cylinder is divided into two cavities (the inner cavity is used to meet the parking brake and auxiliary gas storage energy, and the outer cavity is used to meet the driving brake gas storage energy), which improves the strength while meeting the dual cavity requirement.

[0084] 2. The gas cylinder is simple to manufacture, only a large mold (large mold for producing main shell 1) and a small mold (small mold for producing end cap 4) are needed to meet the requirements.

[0085] 3. Interlocking with hot melt or nut and bolt in the middle can enhance the pressure-bearing capacity of the product.

[0086] 4. Add water drain valve structure to drain air compression condensate water out of the cylinder.

[0087] 5. The end cap has a double Y-shaped structure inside to improve the tensile strength of the side of the end cap and reduce internal stress.

[0088] 6. Two large shells (main shell) open a pair of molds, which meet the requirement of opening a pair of molds through clever product design, and interchangeable inserts are made on the mold to meet the function and connection interface requirements of the two large shells.

[0089] The above is only the preferred embodiment of the application, not any form of limitation on the application. Although the application has been disclosed as above, it is not intended to limit the application. Any skilled person in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the technical solution of the application, and any simple modification, equivalent change and modification of the above embodiments based on the technical essence of the application are still within the scope of the technical solution of the application.

Claims

1. A composite dual chamber air cylinder, characterized by, The gas cylinder comprises an outer cavity (22) and an inner cavity (21), the inner cavity (21) is arranged inside the outer cavity (22), wherein the outer cavity (22) and the inner cavity (21) are mutually opposite and pressurized after being independently and simultaneously inflated; The outer cavity (22) is a space part between the whole of the two main housings (1) of the gas cylinder after being connected with each other and the whole of the two inner cavity cylinders (2) of the gas cylinder after being connected with each other. The inner cavity (21) is a space part formed after the two inner cavity cylinders (2) are connected between the end portions of the two inner cavity cylinders (2) and the end cover (4) of the two inner cavity cylinders (2) is connected. The end cover (4) comprises a cover body (41), a cover top (42) and a sealing element (43), the cover body (41) is polygonal, and the cover top (42) is integrally injection molded with the cover body (41). A connecting hole (421) is arranged at the center of the cover top (42), the sealing element (43) is T-shaped, the bottom of the sealing element (43) is connected with the connecting hole (421), a first inner threaded hole (422) is arranged inside the bottom of the sealing element (43), and the first inner threaded hole (422) is in communication with a stepped hole (423) arranged at the end of the sealing element (43). A plurality of reinforcing mechanisms are uniformly distributed inside the end cover (4), the reinforcing mechanisms are hot-plug connected with the circumferential inner surface of the cover body (41) and the connecting hole (421), the reinforcing mechanisms comprise a first Y-shaped reinforcing rib (432), the main branch end of the first Y-shaped reinforcing rib (432) is connected with the circumferential outer surface of the connecting hole (421), the branch end of the first Y-shaped reinforcing rib (432) is connected with the circumferential inner surface of the cover body (41), and the top of the first Y-shaped reinforcing rib (432) is connected with the inner wall of the cover top (42).

2. A composite dual chamber air cylinder according to claim 1, wherein, The two inner cavity cylinders (2) are connected through a connecting structure, and the two inner cavity cylinders (2) and the two main housings (1) are integrally injection molded.

3. A composite dual chamber air cylinder as defined in claim 1, wherein, The outer edge of the outer port of the connecting hole (421) is polygonal, the outer surface of the cover top (42) is provided with a polygonal reinforcing rib (424), the polygonal reinforcing rib (424) surrounds the outer periphery of the upper port of the connecting hole (421), the polygonal reinforcing rib (424) internally radiates a plurality of first strip-shaped reinforcing ribs (425), the polygonal reinforcing rib (424) externally radiates a plurality of second strip-shaped reinforcing ribs (426) and a plurality of three-jaw reinforcing ribs (427), and the plurality of three-jaw reinforcing ribs (427) and the plurality of second strip-shaped reinforcing ribs (426) are arranged alternately.

4. A composite dual chamber air cylinder according to claim 1 or 2, wherein, One of the main housings (1) is hot-plug injection molded with a first drain valve (12) and a second drain valve (13), the first drain valve (12) is in communication with the outer cavity (22), and the second drain valve (13) is in communication with the inner cavity (21).

5. A composite dual chamber air cylinder according to claim 1 or 2, wherein, A plurality of reinforcing rib strips (33) are arranged on the inner wall of one end of the inner cavity cylinder (2).

6. A composite dual chamber air cylinder according to claim 1 or 2, wherein, An inner reinforcing rib (27) is further arranged between the outer wall of the other end of the inner cavity cylinder (2) and the corresponding main housing (1).

7. The composite dual chamber air cylinder of claim 1, wherein, The gas cylinder is a composite engineering material, comprising the following materials by weight parts: nylon base material 20-100 parts, glass fiber 30-50 parts, compatibilizer 1-8 parts, lubricant 1-12 parts, stabilizer 1-10 parts.

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