A bottom cover for an aerosol can and an aerosol can

Abstract

The utility model belongs to aerosol can technical field especially, relate to a bottom cover and aerosol can for aerosol can. A bottom cover for aerosol can, and the bottom cover is formed with pressure relief structure;Pressure relief structure includes at least one group of score unit, and score unit is by multiple each other separates the non -continuous score segment and constitutes. The utility model discloses a pressure relief structure by non -continuous score segment constitutes, realizes controllable pressure relief under the premise of guaranteeing the overall strength of bottom cover.

Description

Technical Field

[0001] This utility model belongs to the field of aerosol can technology, and particularly relates to a bottom cover for an aerosol can and an aerosol can. Background Technology

[0002] Aerosol cans, as a common pressurized packaging container, are widely used in spray products, fuel storage, and other fields. To prevent explosions caused by pressure overload inside the can, various pressure relief devices have been developed in existing technology, mainly including the following types:

[0003] The first type, such as the utility model patent with authorization announcement number CN219004063U, entitled "A Pressure Relief Device for an Aerosol Can," mentions the following:

[0004] An aerosol can pressure relief device includes a bracket, and the aerosol can pressure relief device further includes:

[0005] A driving element is mounted on a bracket, and its output shaft is located inside the bracket.

[0006] The pressure plate is mounted on the output shaft of the pushing element and is used to move within the bracket under the action of the pushing element.

[0007] The fixing slot is set on the bracket and is corresponding to the pressure plate. The fixing slot is used to place the aerosol can.

[0008] The needle is set in a fixed groove and is used to puncture the aerosol can when it is pressed by a pressure plate.

[0009] The aerosol can is placed in a fixed slot, and a pushing element pushes a pressure plate to compress the aerosol can, causing a piercing needle to puncture it. Finally, the gas or liquid inside the aerosol can flows out. It can be seen that this pressure relief device uses a piercing needle to puncture the can from the bottom, but it requires external equipment to operate, cannot achieve automatic pressure relief, and poses a risk of fragmentation.

[0010] The second method, such as patent application number CN200820086119.5, involves setting continuous wave-shaped grooves on the bottom cover. When pressure is overloaded, the grooves rupture to release pressure. This type of solution is widely used due to its simple structure and low cost, but it has the following significant drawbacks:

[0011] On the one hand, continuous scoring lines are prone to fatigue cracks due to stress concentration during long-term use, increasing the risk of accidental breakage. On the other hand, continuous scoring lines are prone to forming irregular cracks when they break, resulting in random depressurization directions, which may cause local tearing of the tank or splashing of metal fragments.

[0012] Based on this, the present invention provides a novel bottom cover for an aerosol can and an aerosol can to overcome the above-mentioned defects. Utility Model Content

[0013] The purpose of this utility model is to provide a bottom cover for an aerosol can, which achieves controllable pressure relief while ensuring the overall strength of the bottom cover through a pressure relief structure composed of discontinuous grooves.

[0014] The present invention adopts the following technical solution: a bottom cover for an aerosol can, wherein a pressure relief structure is formed on the bottom cover; the pressure relief structure includes at least one set of scoring units, wherein the scoring unit is composed of multiple non-continuous scoring segments that are separated from each other.

[0015] Furthermore, the length of each discontinuous etched segment in the etched unit is S, and the distance between two adjacent discontinuous etched segments is L.

[0016] Furthermore, the ratio of the length S of a single discontinuous notch segment to the distance L between two adjacent discontinuous notch segments is 1.5 ≤ S / L ≤ 5.

[0017] Furthermore, the distance L between two adjacent discontinuous etched segments satisfies: 0.1mm ≤ L ≤ 0.5mm;

[0018] The length S of a single discontinuous notch segment satisfies: 0.2mm ≤ S ≤ 2.0mm.

[0019] Furthermore, the depth D of the discontinuous etched segment satisfies: 0.15T ≤ D ≤ 0.35T, where T is the thickness of the bottom cover.

[0020] Furthermore, the scoring unit is at least two sets, and the scoring unit is distributed concentrically on the surface of the bottom cover.

[0021] Furthermore, the ratio of the total length ΣS of the discontinuous etched segment to the circumferential length C of the bottom cover at the etched segment location satisfies: 60% ≤ ΣS / C ≤ 80%.

[0022] Furthermore, there are at least two sets of the scoring units, and the scoring units are distributed in a cross or star-shaped pattern on the surface of the bottom cover.

[0023] Furthermore, the length of the discontinuous etched segment in each of the etched units increases from the outer edge of the bottom cover to the center.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] This invention utilizes a pressure-relief structure composed of discontinuous grooves to achieve controllable pressure relief while ensuring the overall strength of the bottom cover.

[0026] First, the core component of the pressure relief structure is at least one set of serrated units. Each serrated unit consists of multiple non-continuous serrated segments that are separated from each other. Through modular design, pressure relief paths in different directions can be flexibly arranged to adapt to diverse usage scenarios.

[0027] Secondly, the discretely distributed, discontinuous scoring segments form a fracture guidance path on the bottom cover, avoiding the stress concentration problem caused by traditional continuous scoring. At the same time, the unscored areas between scoring segments form connecting "bridges," which can guide the formation of a regular fracture line upon fracture, effectively preventing the generation of irregular cracks.

[0028] Furthermore, the intermittent design of the discontinuous scoring sections ensures the structural continuity of the bottom cover in the unscored areas, guaranteeing the overall mechanical strength of the bottom cover. When the pressure inside the tank reaches a threshold, the pressure will preferentially cause directional rupture in the area formed by the pre-defined path of the discontinuous scoring sections, thus safely releasing the pressure.

[0029] The second objective of this utility model is to provide an aerosol can, which includes a can body and a bottom cover disposed at the bottom of the can body, wherein the bottom cover is the aforementioned bottom cover for an aerosol can. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the aerosol can structure according to a specific embodiment of the present utility model;

[0032] Figure 2 This is a top view of the bottom cover of this utility model. Figure 1 ;

[0033] Figure 3 This is a top view of the bottom cover of this utility model. Figure 2 ;

[0034] Figure 4 This is a top view of the bottom cover of this utility model. Figure 3 ;

[0035] Figure 5 This is a top view of the bottom cover of this utility model. Figure 4 ;

[0036] Figure 6 This is a partial cross-sectional view of the discontinuous grooved section in the bottom cover of this utility model;

[0037] Among them: 1. Scratching unit; 2. Non-continuous scratching section; 3. Bottom cover; 4. Tank body. Detailed Implementation

[0038] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0039] The following is in conjunction with the appendix Figure 1 To be continued Figure 6 The present invention will be described in detail with reference to specific embodiments:

[0040] like Figures 1 to 6 As shown, this utility model provides a bottom cover for an aerosol can, wherein a pressure relief structure is formed on the bottom cover 3.

[0041] The pressure relief structure includes at least one set of scoring units 1, each scoring unit 1 consisting of multiple discontinuous scoring segments 2 spaced apart, which define a preset pressure relief path on the bottom cover. It should be noted that in this invention, the red lines represent the discontinuous scoring segments 2.

[0042] In this invention, a pressure relief structure composed of discontinuous grooved sections 2 is used to achieve controllable pressure relief while ensuring the overall strength of the bottom cover 3.

[0043] First, the core component of the pressure relief structure is at least one set of serrated units 1. Each serrated unit 1 consists of multiple non-continuous serrated segments 2 that are separated from each other. Through modular design, pressure relief paths in different directions can be flexibly arranged to adapt to diverse usage scenarios.

[0044] Secondly, the discretely distributed discontinuous scoring segments 2 form a fracture guidance path on the bottom cover, avoiding the stress concentration problem caused by traditional continuous scoring. At the same time, the unscored areas between the scoring segments form connecting "bridges," which can guide the formation of regular fracture lines during fracture, effectively preventing the generation of irregular cracks.

[0045] Furthermore, the spaced design of the discontinuous scoring section 2 ensures the structural continuity of the bottom cover 3 in the unscored areas, guaranteeing the overall mechanical strength of the bottom cover. When the pressure inside the tank reaches the threshold, the pressure will preferentially cause directional rupture in the area formed by the pre-set path of the discontinuous scoring section 2, thus safely releasing the pressure.

[0046] Furthermore, in some specific embodiments, such as Figure 5As shown, the length of each non-continuous etched segment 2 in the etched unit 1 is S, and the distance between two adjacent non-continuous etched segments 2 is L.

[0047] By setting both the length S and spacing L of the discontinuous notched segments 2 to fixed values, uniformly distributed notched units 1 were constructed. Unifying the length of the discontinuous notched segments 2 to S ensures that each segment 2 exhibits a consistent deformation response under stress, avoiding stress concentration due to excessively short local notches or insufficient structural strength due to excessively long notches. Unifying the spacing between adjacent discontinuous notched segments 2 to L precisely controls the interval between them, maintaining the continuity of the overall structure of the bottom cover 3 to ensure mechanical strength, while also creating a regular distribution of weak areas. This combination of equal-length discontinuous notched segments 2 and equal spacing allows the pressure-relieving structure to fracture uniformly along a predetermined path under pressure, overcoming the randomness of the fracture direction of continuous notched lines, and simultaneously reducing the risk of stress concentration in the overall structure through discretized notch distribution.

[0048] In some more specific embodiments, the ratio of the length S of a single discontinuous notch segment 2 to the distance L between two adjacent discontinuous notch segments 2 is 1.5 ≤ S / L ≤ 5. By limiting the range of the ratio of the length of the discontinuous notch segment 2 to the distance, a balance is established between structural strength and pressure relief controllability. Specifically, when the lower limit of the S / L ratio is 1.5, it ensures that a single discontinuous notch segment 2 has sufficient length to form an effective stress concentration area, avoiding stress dispersion due to the discontinuous notch segment 2 being too short, thus preventing the formation of a predetermined rupture path; when the upper limit is 5, it prevents the discontinuous notch segment 2 from being too long, resulting in too small a distance between adjacent discontinuous notch segments 2, thereby avoiding excessive reduction in the overall strength of the notch line. This ratio range, by precisely controlling the relative proportion of the notch segments and the distance, ensures the overall structural integrity of the pressure relief structure under normal pressure, and also enables orderly rupture along a predetermined path under overpressure.

[0049] More specifically, the spacing L between two adjacent discontinuous notched segments 2 satisfies: 0.1mm ≤ L ≤ 0.5mm; the length S of a single discontinuous notched segment 2 satisfies: 0.2mm ≤ S ≤ 2.0mm, optimizing the mechanical properties of the notched structure. Correspondingly, controlling the spacing L between 0.1mm and 0.5mm ensures sufficient interval between adjacent discontinuous notched segments 2 to avoid excessive stress concentration, while also preventing excessively large spacing from causing the overall structural strength of the notched unit 1 to be too high, thus failing to effectively form a fracture path. Limiting the length S of a single discontinuous notched segment 2 to 0.2mm to 2.0mm ensures that each discontinuous notched segment 2 has sufficient weakening effect to guide fracture, while also preventing excessive length from causing the notched segment itself to become a local weak point and triggering unexpected fracture.

[0050] Furthermore, in some specific embodiments, such as Figure 6 As shown, the depth D of the discontinuous notch segment 2 satisfies: 0.15T ≤ D ≤ 0.35T, where T is the thickness of the bottom cover 3. By limiting the ratio between the depth of the discontinuous notch segment 2 and the thickness of the bottom cover 3, it ensures that the notch segment can preferentially fracture under pressure overload to achieve the pressure relief function, while avoiding the problems of excessively deep notches leading to a significant decrease in the overall strength of the bottom cover 3 or insufficiently shallow notches failing to effectively guide the fracture path. Specifically, by controlling the notch depth D within the range of 15% to 35% of the bottom cover thickness T, the discontinuous notch segment 2 can form sufficient stress concentration to trigger controllable fracture without causing unexpected structural failure due to excessive material weakening. This balances the conflict between pressure relief response sensitivity and bottom cover load-bearing capacity, ensuring that the aerosol can maintains structural integrity during normal use and can stably relieve pressure through a predetermined path under abnormal pressure. It should be noted that the depth D of the discontinuous notch segment 2 refers to the remaining thickness at the notch segment.

[0051] Furthermore, in some specific embodiments, the scoring unit 1 is in at least two sets, and the scoring unit 1 is distributed concentrically on the surface of the bottom cover 3, such as... Figure 2 As shown, a multi-level stress dispersion structure is formed by setting two sets of concentrically distributed scoring units 1. In this embodiment, there are two sets of scoring units 1.

[0052] Meanwhile, the ratio of the total length ΣS of the discontinuous scribing segment 2 to the circumferential length C of the bottom cover 3 at the scribing segment position satisfies: 60% ≤ ΣS / C ≤ 80%. It should be noted that the circumferential length C of the bottom cover 3 is the unfolded length of the bottom cover 3 at the scribing segment. Taking the top view of the bottom cover 3 in the attached figure as a circle as an example, C represents the circumferential length at the scribing segment position.

[0053] By limiting the ratio between the total length of the discontinuous notched segment 2 and the circumferential length of the bottom cover 3, the structural strength is optimized while ensuring the reliability of pressure relief. Specifically, when the ΣS / C ratio is not less than 60%, the distribution density of the notched segments is sufficient to form weak paths, ensuring that the structure breaks along a predetermined path under pressure overload, avoiding fragmentation caused by random cracking; when the ratio is not higher than 80%, the unnotched area retains sufficient structural strength to prevent the overall strength of the bottom cover 3 from decreasing due to excessive notching, thus avoiding accidental breakage under non-pressure relief conditions.

[0054] Furthermore, in some specific embodiments, there are at least two sets of the scoring units 1, and the scoring units 1 are distributed in a cross-shaped or star-shaped pattern on the surface of the bottom cover 3, such as... Figure 3 , 4 As shown.

[0055] By setting at least two sets of notched units 1 and arranging them in a cross-shaped or star-shaped pattern, a multi-directional pressure relief path is formed. Increasing the number of notched units 1 improves the redundancy of the pressure relief structure, preventing the failure of a single notched line from causing the overall pressure relief function to be lost. The cross-shaped or star-shaped arrangement guides the rupture path to expand in a predetermined direction through the cooperation of the multi-directional notched lines, avoiding random cracks caused by stress concentration when continuous notched lines break, thereby controlling the pressure relief direction and reducing the risk of local tearing of the tank. The cross-shaped structure can also evenly distribute stress during pressure overload, reducing the probability of fatigue cracks caused by local stress concentration in the notched lines.

[0056] More specifically, the length of the discontinuous etched segment 2 in each of the etched units 1 increases from the outer edge of the bottom cover 3 to the center, such as... Figure 4 As shown, the notched unit 1 employs a gradient design with discontinuous notched segments 2 that are short at the outer edge and long at the center. The short notched segments at the outer edge maintain the structural strength of the rolled edge area and prevent accidental breakage. At the same time, the long notched segments at the center preferentially respond to internal pressure stress, ensuring that when the pressure exceeds the limit, directional breakage starts from the center area. This achieves a progressive fracture mechanism "from the inside out," which can both achieve rapid pressure relief and control the orderly propagation of cracks along a preset path, effectively avoiding random cracking and lateral jetting risks. This improves the safety and controllability of the pressure relief process while ensuring structural stability.

[0057] Based on the aforementioned bottom cover for an aerosol can, this utility model further provides an aerosol can, comprising a can body 4 and a bottom cover 3 disposed at the bottom of the can body 4, wherein the bottom cover 3 is the aforementioned bottom cover for an aerosol can. This aerosol can includes at least all the technical solutions of the aforementioned bottom cover for an aerosol can and possesses at least all the advantages of the aforementioned bottom cover for an aerosol can, which will not be elaborated further here.

[0058] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. A bottom cap for an aerosol can, characterized in that: A pressure relief structure is formed on the bottom cover; The pressure relief structure includes at least one set of scoring units, each scoring unit consisting of multiple discontinuous scoring segments that are separated from each other; The length of each discontinuous etch segment in the etch unit is S, and the distance between two adjacent discontinuous etch segments is L. The ratio of the length S of a single discontinuous etched segment to the distance L between two adjacent discontinuous etched segments is 1.5 ≤ S / L ≤ 5.

2. The bottom cover for an aerosol can according to claim 1, characterized in that: The distance L between two adjacent discontinuous scribe segments satisfies: 0.1mm ≤ L ≤ 0.5mm; The length S of a single discontinuous notch segment satisfies: 0.2mm ≤ S ≤ 2.0mm.

3. The bottom cover for an aerosol can according to claim 1, characterized in that: The depth D of the discontinuous etched segment satisfies: 0.15T≤D≤0.35T, where T is the thickness of the bottom cover.

4. The bottom cover for an aerosol can according to claim 1, characterized in that: The scoring unit is at least two sets, and the scoring unit is distributed in a concentric circle on the surface of the bottom cover.

5. The bottom cover for an aerosol can according to claim 4, characterized in that: The ratio of the total length ΣS of the discontinuous etched segment to the circumferential length C of the bottom cover at the etched segment location satisfies: 60%≤ΣS / C≤80%.

6. The bottom cover for an aerosol can according to claim 1, characterized in that: The scoring units are in at least two sets, and the scoring units are distributed in a cross or star-shaped pattern on the surface of the bottom cover.

7. The bottom cover for an aerosol can according to claim 6, characterized in that: The length of the discontinuous etched segment in each of the etched units increases from the outer edge of the bottom cover to the center.

8. An aerosol can, characterized in that: The aerosol can includes a can body and a bottom cover disposed at the bottom of the can body, wherein the bottom cover is the bottom cover for an aerosol can as described in any one of claims 1 to 7.

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