Bottle opening structure and air cylinder

Abstract

The utility model provides a bottle opening structure and an air cylinder, relates to the technical field of composite material air cylinders, and adopts the technical scheme that the bottle opening structure comprises a liner opening, an outer sleeve and an inner sleeve, the liner opening is provided with a lining shoulder and a liner opening inner wall, a mounting groove is formed between the liner opening inner wall and the lining shoulder, the outer sleeve is embedded into the mounting groove of the liner opening, the outer sleeve is provided with an internal thread, and the inner sleeve is provided with an external thread. The inner sleeve is connected into the outer sleeve in a threaded mode and extends into the container opening, and the inner wall of the container opening is clamped between the outer sleeve and the inner sleeve. The air cylinder comprises an inner container, the bottle opening structure is arranged on the inner container, a fiber layer is wound outside the inner container, the fiber layer extends to the outer sleeve, and the bottom of the outer sleeve is clamped between the lining shoulder and the fiber layer. The bottle cap has the advantages that the sealing performance of the bottle opening is guaranteed, and compared with the prior art, the bottle cap has a better sealing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of composite material gas storage cylinders, in particular to a bottle mouth structure, and further relates to a gas storage cylinder. Background Art

[0002] Automobile brake air reservoirs store compressed air and supply air to pneumatic brake systems or other systems of the vehicle that require compressed air. Composite brake air reservoirs are also used due to their advantages of light weight, corrosion resistance, rust resistance, and long service life. Composite brake air reservoirs are made of resin-impregnated fibers wound on the outer surface of a plastic inner shell, which have compressive strength after high-temperature curing. Due to the characteristics of the fiber winding process, an opening (i.e., a pole hole) is formed only at the end position of the axis of the wound workpiece, which becomes the bottle mouth after molding. The patent with announcement number CN 102388255 B discloses a winding method for cylindrical pressure vessels. According to the technical solutions and drawings disclosed therein, it can be concluded that connecting the auxiliary pipes to the opening of the straight section equipment will interfere with the winding path of the fiber, and the opening is suitable for being set at the end pole hole position of the head, and the economical inner shell molding is blow molding. It is difficult to open a hole in the straight section during molding, which is known to ordinary technicians in this field.

[0003] At present, the structure of the mouth of the existing composite brake air cylinder is thin and the inner liner is blow-molded. How to achieve a good seal at the mouth of the inner liner has become a major problem faced today. The sealing assembly of the existing technology generally has an inner core and an outer tube. The inner core is arranged in the outer tube through a threaded sleeve. The joint part of the inner core and the outer tube is provided with a groove that can accommodate the mouth of the inner liner and a sealing ring. The inner core and the outer tube clamp the mouth of the inner liner to achieve sealing, but this method has the problem of poor sealing, which generally occurs during the use and production of the gas cylinder. First, during use, although the mouth of the inner liner is clamped by the inner core and the outer tube, it still has a tendency to slip inward along the axis of the container, resulting in seal failure. Secondly, Chinese patent CN116081409A discloses a winding device and method for composite material containers, specifically "the core mold is fixed to the middle section of the main shaft, and the main shaft transmits the driving force to the core mold, so that the core mold rotates with the main shaft as the axis." In actual operation, the winding operation is performed after the inner liner and the bottle mouth sealing structure are assembled. The "main shaft" of the winding device is connected to the bottle mouth sealing structure to realize the rotational winding operation of the inner liner. The winding tension of the fiber and the driving force transmitted to the inner liner by the main shaft form a torsional effect on the inner liner and the sealing structure, which will cause the sealing structure to rub against the inner liner bottle mouth and destroy the seal. In addition, the existing technology usually directly snaps the sealing component onto the inner liner, but this method still has the problem of poor sealing, and the more times the sealing component is disassembled, the looser the fit between the sealing component and the inner liner mouth becomes, the larger the gap becomes, and the sealing problem will become more serious. Utility Model Content

[0004] The purpose of the utility model is to solve the problem of poor sealing at the inner liner opening of the existing composite material gas storage cylinder, and to propose and design a bottle mouth structure and a gas storage cylinder, which can well achieve the sealing at the inner liner opening.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a bottle mouth structure, including a mouth, an outer sleeve and an inner sleeve, the mouth having a shoulder and an inner wall of the mouth, a mounting groove formed between the inner wall of the mouth and the shoulder, the outer sleeve embedded in the mounting groove of the mouth, the outer sleeve having an internal thread, the inner sleeve threadedly connected to the outer sleeve and the inner sleeve extending into the mouth, the inner wall of the mouth being sandwiched between the outer sleeve and the inner sleeve. By splitting the sealing component into a matching structure of an inner sleeve and an outer sleeve, on the one hand, the outer sleeve is embedded in the mouth, and the inner sleeve and the outer sleeve sandwich the inner wall of the mouth, fitting tightly together, and on the other hand, the inner sleeve and the outer sleeve are threadedly connected to achieve a longer thread section, which has a better sealing effect. When disassembling, the inner sleeve can be removed. Since the inner sleeve and the outer sleeve are threadedly connected, there will be no gap enlargement, thereby avoiding affecting the sealing at the mouth.

[0006] Furthermore, a sealing ring is provided between the inner wall of the gallbladder opening and the inner sleeve. To further improve the sealing performance, the sealing ring is installed in an annular groove, which can be provided on the inner sleeve or on the inner wall of the gallbladder opening.

[0007] Furthermore, the mounting groove is provided with a stop portion, and the bottom of the outer sleeve is provided with an embedded portion. The outer sleeve is embedded in the mounting groove through the embedded portion and fits with the stop portion. The stop portion forms a blocking limit for the outer sleeve, ensuring that the outer sleeve fits tightly with the gallbladder opening, is difficult to deflect, and is conducive to sealing.

[0008] Furthermore, a flange is provided on the inner wall of the gall bladder opening, and a slot is provided on the outer sleeve at a position corresponding to the flange, and the flange is snapped into the slot. The outer sleeve and the inner wall of the gall bladder opening are snapped together by a snap-fit ​​structure formed by the flange and the slot, so as to prevent the gall bladder opening from shrinking toward the inside of the gas cylinder (shrinking in the axial direction) due to the replay of the gas cylinder medium or changes in external environmental factors (such as hot and cold), thereby preventing leakage; and because the flange is provided on the inner wall of the gall bladder opening, the inner sleeve squeezes the snap-fitting part against the outer sleeve after snapping, and the connection between the gall bladder opening and the bottle mouth sealing assembly is more reliable. The provision of the flange also increases the contact area between the bottle mouth and the outer sleeve, which is beneficial to sealing. Regarding the shape of the flange, the flange can be arc-shaped, tooth-shaped, rectangular, etc.

[0009] Furthermore, the stop portion includes at least one stepped stop protrusion, and a stop recess is provided on the arc surface of the embedded portion at a position corresponding to the stop portion, and the stop protrusion engages with the stop recess. By providing a stepped stop protrusion and a stop recess on the embedded portion of the outer sleeve, the stop recess is provided on the arc surface, and the stop recess cooperates with the stop protrusion to form a side stop. After the embedded portion of the outer sleeve is engaged with the installation groove, relative rotation between the outer sleeve and the bladder opening can be prevented. Because the outer sleeve needs to be prevented from twisting when installing the inner sleeve, twisting also needs to be prevented when winding the inner sleeve. The inner sleeve is wound after the sealing assembly is installed. The sealing assemblies at both ends are fixed to the rotating main shaft of the winding equipment by a tool. The rotation of the main shaft drives the inner sleeve to rotate, thereby winding the fibers around the surface of the inner sleeve to form a fiber layer. The wound fibers have tension. To prevent the fibers and the inner sleeve from slipping during winding, the axial twisting tendency of the inner sleeve relative to the sealing assembly must be overcome. Alternatively, the stop portion includes at least one cylindrical stop protrusion, which is disposed in the mounting groove and protrudes upward. A stop groove is disposed on the outer sleeve at a position corresponding to the stop protrusion, and the stop protrusion is inserted into the stop groove. Multiple stop protrusions and stop grooves are provided. The cooperation of the stop protrusion and the stop groove prevents relative rotation between the outer sleeve and the gallbladder opening. The reason for preventing relative rotation is described above.

[0010] Of course, the positions of the above-mentioned stop protrusion and stop recess can be interchanged, and the positions of the stop protrusion and stop groove can be interchanged.

[0011] Furthermore, the inner sleeve is provided with air holes and drainage holes, and a plugging core is also provided on the inner sleeve, and the plugging core is located between the air holes and the drainage holes to achieve the functions of exhaust and drainage, and the plugging core plays the role of isolation and blocking.

[0012] The present invention also provides an air reservoir comprising an inner liner with the aforementioned bottle mouth structure disposed thereon, a fiber layer wrapped around the outer liner, the fiber layer extending to an outer shell, and the bottom of the outer shell sandwiched between the shoulder pad and the fiber layer. This ensures a tight seal at the bottle mouth and provides a superior sealing effect compared to existing technologies.

[0013] It can be seen from the above technical solutions that the present invention has the following advantages:

[0014] 1. By splitting the sealing assembly into an inner sleeve and an outer sleeve matching structure, on the one hand, the outer sleeve is embedded in the bile opening, and the inner sleeve and the outer sleeve sandwich the inner wall of the bile opening in the middle, and fit tightly; on the other hand, the inner sleeve and the outer sleeve are threadedly connected to achieve a longer thread section, which has a better sealing effect. When disassembling, just remove the inner sleeve. Because the inner sleeve and the outer sleeve are threadedly connected, there will be no gap enlargement, which avoids affecting the sealing at the bile opening.

[0015] 2. It can prevent the axial shrinkage of the inner liner opening. The sleeve and the inner wall of the opening are connected by a snap-fit ​​structure formed by a flange and a slot. This prevents the opening from shrinking (axially shrinking) inwards of the gas reservoir due to replay of the gas cylinder medium or changes in external environmental factors (such as heat or cold), which could cause leakage. In addition, because the flange is set on the inner wall of the opening, the inner sleeve squeezes the snap-fit ​​part against the outer sleeve after connection, making the connection between the opening and the bottle mouth sealing assembly more reliable.

[0016] 3. It can prevent relative rotation between the outer sleeve and the inner liner. Because the outer sleeve needs to be prevented from twisting when installing the inner sleeve, it also needs to be prevented from twisting when winding the inner liner. The inner liner is wound after the sealing assembly is installed. The sealing assemblies at both ends are fixed to the rotating main shaft of the winding equipment by the tooling. The rotation of the main shaft drives the inner liner to rotate, thereby winding the fiber on the surface of the inner liner to form a fiber layer. The wound fiber has tension. In order to prevent the fiber and the inner liner from slipping during winding, the axial twisting tendency of the inner liner relative to the sealing assembly must be overcome. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic structural diagram of specific implementation methods 1, 2, 3, and 4 of the present utility model.

[0019] Figure 2 This is a state diagram of the jacket when installed in the specific embodiment 2 of the present invention.

[0020] Figure 3 This is a structural diagram of the gallbladder opening of the specific implementation method 3 of the present utility model.

[0021] Figure 4 This is a schematic structural diagram of a jacket in a third embodiment of the present invention.

[0022] Figure 5 This is a structural diagram of the gallbladder port of a specific embodiment 4 of the present invention.

[0023] Figure 6 This is a schematic structural diagram of a jacket in a fourth embodiment of the present invention.

[0024] Figure 7 This is a structural diagram of specific implementation method 5 of the present utility model.

[0025] In the figure, 1, liner, 2, outer sleeve, 3, inner sleeve, 4, shoulder lining, 5, inner wall of the liner opening, 6, sealing ring, 7, internal thread, 8, flange, 9, slot, 10, stopper, 11, embedded part, 12, end cover, 13, air hole, 14, drainage hole, 15, plugging core, 16, fiber layer, 17, drainage pipe, 18, stopper protrusion, 19, stopper groove, 20, stopper depression, 100, fixture. DETAILED DESCRIPTION

[0026] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Specific implementation method 1

[0028] like Figures 1 to 6 As shown, this specific embodiment provides a bottle mouth structure, including a gallbladder mouth, an outer sleeve 2 and an inner sleeve 3, the gallbladder mouth is provided with a shoulder 4 and an inner wall 5 of the gallbladder mouth, the inner wall 5 of the gallbladder mouth is actually a tubular medium inlet and outlet channel, and is connected to the shoulder 4, the shoulder 4 is a disc-shaped depression at the gallbladder mouth toward the interior of the inner liner, a mounting groove is formed between the inner wall 5 of the gallbladder mouth and the shoulder 4, the outer sleeve 2 is embedded in the mounting groove of the gallbladder mouth, the outer sleeve 2 has an internal thread 7, the columnar inner sleeve 3 is threadedly connected to the outer sleeve 2 and the inner sleeve 3 extends into the gallbladder mouth, and the inner wall 5 of the gallbladder mouth is clamped between the outer sleeve 2 and the inner sleeve 3.

[0029] Among them, a sealing ring 6 is provided between the inner wall 5 of the bile opening and the inner sleeve 3 to further improve the sealing performance. The sealing ring 6 is installed in an annular groove. The annular groove can be provided on the inner sleeve 3 or on the inner wall 5 of the bile opening.

[0030] Among them, the mounting groove is provided with a stop portion 10, the outer sleeve 2 has a tubular structure, and a disc-shaped embedding portion 11 is provided at one end of the tubular structure. The outer sleeve 2 is embedded in the mounting groove through the embedding portion 11 and fits with the stop portion 10. The stop portion 10 forms a blocking limit for the outer sleeve 2, ensuring that the outer sleeve 2 fits tightly with the gallbladder opening, making it difficult to deflect, which is conducive to sealing.

[0031] In addition, the inner sleeve 3 has an end cover 12, which abuts against the upper edge of the outer sleeve 3. The inner sleeve 3 is provided with an air hole 13 and a drainage hole 14. The inner sleeve 3 is also provided with a plugging core 15, which is located between the air hole 13 and the drainage hole 14. The drainage hole 14 is connected to a drainage pipe 17 extending into the interior of the inner liner 1 to realize the air intake and exhaust and drainage functions, and the plugging core 15 plays a role of separation and sealing.

[0032] The setting principle is as follows: by splitting the sealing component into an inner sleeve 3 and an outer sleeve 2 matching structure, on the one hand, the outer sleeve 2 is embedded in the bile opening, and the inner sleeve 3 and the outer sleeve 2 sandwich the inner wall 5 of the bile opening in the middle, and fit tightly; on the other hand, the inner sleeve 3 and the outer sleeve 2 are threadedly connected to achieve a longer thread section, which has a better sealing effect. When disassembling, just remove the inner sleeve 3. Since the inner sleeve 3 and the outer sleeve 2 are threadedly connected, the gap will not become larger, thereby avoiding affecting the sealing at the bile opening. Specific embodiment 2

[0034] like Figure 1 As shown, this specific embodiment is a further improvement on the basis of specific embodiment 1, and the improvements are as follows: a flange 8 is provided on the inner wall 5 of the gallbladder opening, and a slot 9 is provided on the outer sleeve 2 at a position corresponding to the flange 8, and the flange 8 is snapped into the slot 9. The outer sleeve 2 and the inner wall 5 of the gallbladder opening are snapped together by the snapping structure formed by the flange 8 and the slot 9, so as to prevent the gallbladder opening from shrinking toward the inside of the gas storage cylinder (shrinking in the axial direction) due to the filling and discharging of the gas cylinder medium or changes in external environmental factors (such as hot and cold), thereby preventing leakage; and because the flange 8 is provided on the inner wall 5 of the gallbladder opening, after snapping together, the inner sleeve 3 squeezes the snapping part against the outer sleeve 2, and the connection between the gallbladder opening and the bottle mouth sealing assembly is more reliable. Regarding the shape of the flange 8, the flange 8 can be arc-shaped, tooth-shaped, rectangular, etc.

[0035] See also Figure 2 The installation method of the jacket 2 and the gallbladder opening is as follows: the foldable fixture 100 goes deep into the gallbladder opening, holds the shoulder pad 4, applies force to move the jacket 2 toward the gallbladder opening, and the flange 8 slides into the slot 9. Specific implementation method 3

[0037] like Figure 3 and Figure 4As shown, to prevent relative rotation between the outer shell 2 and the bladder opening, this embodiment provides a solution for a stopper 10 to cooperate with the outer shell 2. Specifically, the stopper 10 includes at least one stepped stopper protrusion 18. The stopper protrusion 18 is provided on the side of the shoulder pad 4. The stopper protrusion 18, the shoulder pad 4, and the inner shell 1 are integrally formed. A stopper recess 20 is provided on the arc surface of the embedded portion 11 at a position corresponding to the stopper 10. The stopper protrusion 20 engages with the stopper recess 20. Of course, in other embodiments, the positions of the stopper protrusion 18 and the stopper recess 20 can be interchanged, which does not affect their functions. By providing the stepped stopper protrusion 18 and the stopper recess 20 on the embedded portion 11 of the outer shell 2, the stopper recess 20 is provided on the arc surface, and the stopper recess 20 cooperates with the stopper protrusion 18 to form a side stop. When the embedded portion 11 of the outer shell 2 is engaged with the mounting groove, relative rotation between the outer shell 2 and the bladder opening can be prevented. Because it is necessary to prevent the outer sleeve 2 from twisting when installing the inner sleeve 3, it is also necessary to prevent twisting when the inner liner 1 is wound. The inner liner 1 is wound after the sealing component is installed. The sealing components at both ends are fixed on the rotating main shaft of the winding equipment by the tooling. The rotation of the main shaft drives the inner liner 1 to rotate, thereby winding the fibers on the surface of the inner liner 1 to form a fiber layer 16. The wound fibers have tension. In order to prevent the fibers and the inner liner 1 from slipping during winding, the axial twisting tendency of the inner liner 1 relative to the sealing component must be overcome. Specific implementation method 4

[0039] like Figure 5 and Figure 6 As shown, because the outer sleeve 2 needs to be prevented from twisting when the inner sleeve 3 is installed, the inner liner 1 also needs to be prevented from twisting when it is wound. The inner liner 1 is wound after the sealing component is installed. The sealing components at both ends are fixed on the rotating main shaft of the winding device by the tooling. The rotation of the main shaft drives the inner liner 1 to rotate so that the fiber is wound on the surface of the inner liner 1 to form a fiber layer 16. The wound fiber has tension. In order to prevent the fiber and the inner liner 1 from slipping during winding, the axial twisting tendency of the inner liner 1 relative to the sealing component must be overcome. In this regard, this specific embodiment The formula provides a solution different from Specific Embodiment 3. Specifically, the stop portion 10 includes at least one columnar stop protrusion 18, which is disposed on the bottom surface of the mounting groove and protrudes upward. A stop groove 19 is disposed on the outer sleeve 2 at a position corresponding to the stop protrusion 18. The stop protrusion 18 is inserted into the stop groove 19. There are multiple stop protrusions 18 and stop grooves 19. The stop protrusion 18 is a plug structure. The cooperation between the stop protrusion 18 and the stop groove 19 can prevent relative rotation between the outer sleeve and the bile opening. Of course, in other embodiments, the relative positions of the stop protrusion 18 and the stop groove 19 can be interchanged, which does not affect their functions. Specific implementation method 5

[0041] like Figure 7As shown, this embodiment provides a gas reservoir, comprising an inner liner 1 provided with the bottle mouth structure described in Embodiments 1, 2, or 3. A fiber layer 16 is wrapped around the outer liner 1, extending to an outer shell 2, with the bottom of the outer shell 2 sandwiched between a shoulder 4 and the fiber layer 16. This ensures a tight seal at the bottle mouth, achieving a superior sealing effect compared to existing technologies.

[0042] The terms "upper," "lower," "outer side," "inner side," and the like (if any) in the specification and claims of the present invention and the drawings are used to distinguish relative positions without necessarily giving qualitative definitions. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0043] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components; wireless connections or wired connections. A person skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0044] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bottle mouth structure, comprising a mouth, an outer sleeve and an inner sleeve, characterized in that: The bile opening is provided with a shoulder pad and an inner wall of the bile opening, a mounting groove is formed between the inner wall of the bile opening and the shoulder pad, the outer sleeve is embedded in the mounting groove of the bile opening, the outer sleeve has an internal thread, the inner sleeve is threadedly connected to the outer sleeve and the inner sleeve extends into the bile opening, and the inner wall of the bile opening is clamped between the outer sleeve and the inner sleeve.

2. The bottle mouth structure according to claim 1, characterized in that: A sealing ring is arranged between the inner wall of the gallbladder opening and the inner sleeve.

3. The bottle mouth structure according to claim 1, characterized in that: The installation groove is provided with a stopper, and the bottom of the outer sleeve is provided with an embedding portion. The outer sleeve is embedded in the installation groove through the embedding portion and fits with the stopper, and the stopper blocks the outer sleeve.

4. The bottle mouth structure according to any one of claims 1 to 3, characterized in that: A flange is arranged on the inner wall of the gallbladder opening, and a slot is arranged on the outer sleeve at a position corresponding to the flange, and the flange is inserted into the slot.

5. The bottle mouth structure according to claim 3, characterized in that: The stop portion comprises at least one step-shaped stop protrusion, and a stop recess is arranged on the arc surface of the embedded portion at a position corresponding to the stop portion, and the stop protrusion is engaged with the stop recess.

6. The bottle mouth structure according to claim 3, characterized in that: The stop part includes at least one columnar stop protrusion, which is arranged in the installation groove and protrudes upward. A stop groove is arranged at a position on the outer sleeve corresponding to the stop protrusion, and the stop protrusion is inserted into the stop groove.

7. The bottle mouth structure according to any one of claims 1 to 2, characterized in that: The inner sleeve is provided with air holes and drainage holes, and the inner sleeve is also provided with a plugging core, which is located between the air holes and the drainage holes.

8. A gas storage cylinder, comprising an inner liner, characterized in that: The inner liner is provided with a bottle mouth structure as described in any one of claims 1 to 7, a fiber layer is wound around the outer liner, the fiber layer extends to the outer jacket, and the bottom of the outer jacket is sandwiched between the shoulder pad and the fiber layer.

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