Aerosol can explosion-proof cover and aerosol can with aerosol can explosion-proof cover

Abstract

The invention provides an aerosol can anti-explosion cover and an aerosol can applying the same, and belongs to the technical field of anti-explosion covers, the aerosol can anti-explosion cover comprises a spray head and a cover body, the cover body is provided with a concave area and a connecting area, the bottom of the concave area is provided with an anti-explosion opening, the connecting area is connected with a can body in a sealed mode, a lining is fixed to the inner side of the cover body, and a conical convex top area is arranged on the lining. And the conical convex top area corresponds to the explosion-proof opening. According to the anti-explosion cover of the aerosol can and the aerosol can applying the anti-explosion cover, the lining is arranged in the cover body, the conical convex top area on the lining is matched with the anti-explosion openings, when the air pressure in the aerosol can reaches or exceeds an explosion threshold value, the conical convex top area preferentially deforms from the cover body and acts on the cover body area at the anti-explosion openings in a jacking mode, and the anti-explosion cover of the aerosol can and the aerosol can applying the anti-explosion cover are combined with the design of the multiple anti-explosion openings. When the air pressure in the aerosol can reaches or exceeds an explosion threshold value, at least one explosion-proof opening is torn in time to form a pressure relief gap, the instantaneous pressure relief effect is ensured, the explosion condition is avoided, and the use safety and reliability of the aerosol can are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of explosion-proof caps, and specifically to an aerosol can explosion-proof cap and an aerosol can to which the same is applied. Background Art

[0002] As a pressure vessel widely used in the fields of daily chemicals, medicine, industry, etc., the safety of an aerosol can has always been the core issue in its design and use. During storage or transportation, due to temperature changes, external impacts or internal chemical reactions, the pressure inside the can may abnormally increase. If the pressure cannot be released in time, there is a risk of explosion. Therefore, the design of the explosion-proof cap structure is directly related to the safety and reliability of the product.

[0003] Currently, the explosion-proof technology of aerosol cans on the market mainly realizes pressure relief by setting a single weak area (such as a pre-scored mark, a reduced-thickness layer) on the can lid. For example, in the patent with the Chinese patent publication number CN108058926A, when the pressure inside the can reaches the critical point, the face cover part corresponding to the inner concave hole and the outer concave hole is pushed open by the pressure to form a pressure relief channel, prompting the gas in the pipe to flow out from this pressure relief channel, thereby achieving the explosion-proof effect of the aerosol can. However, the defect of such a design is that the pressure relief response accuracy is low, and the tear sensitivity of the single weak area to pressure changes is insufficient. When the pressure inside the aerosol can increases and reaches or exceeds the explosion threshold, the can lid is deformed under pressure, but the single weak area cannot be quickly torn, resulting in a delay in pressure relief or an inability to instantaneously relieve pressure of the aerosol can, leading to the occurrence of an explosion of the aerosol can and posing a safety hazard. Summary of the Invention

[0004] The present invention provides an aerosol can explosion-proof cap and an aerosol can to which the same is applied, so as to solve the problem of low pressure relief response accuracy in the related art, which leads to the explosion of the can body.

[0005] The present invention provides an aerosol can explosion-proof cap, including a spray head, a cap body and a lining. The spray head is arranged on the top of the cap body. The cap body is provided with a recessed area and a connection area. An explosion-proof port is arranged at the bottom of the recessed area. The connection area is hermetically connected to the can body.

[0006] The lining is fixed inside the cap body and is provided with a conical convex top area corresponding to the position of the explosion-proof port. When the internal pressure reaches or exceeds the explosion threshold, the conical convex top area deforms preferentially to the cap body and props up the explosion-proof port, accelerating the tearing of the explosion-proof port.

[0007] The lining includes a first fixed part fixed between the connection area and the can body and a deformed part located inside the cap body and along the inner side wall of the cap body. The deformed part is in a non-continuous state in the circumferential direction, and the conical convex top area is located on the deformed part.

[0008] The thickness of the cap body, the thickness of the lining, and the thickness of the cap body at the explosion-proof port decrease in sequence.

[0009] In a possible implementation manner, the concave area is an annular structure, and the number of explosion-proof ports is several and evenly distributed along the circumference of the concave area.

[0010] In a possible implementation manner, the number of the concave areas is not less than one and is distributed along the axial direction of the cover body.

[0011] In a possible implementation manner, the connection area is connected to the tank body by a rolling seal method.

[0012] In a possible implementation manner, the inner lining further includes a second fixing part fixed between the nozzle and the cover body.

[0013] In a possible implementation manner, the number of rolling seal layers of the rolling seal method is not less than three.

[0014] The present invention also provides an aerosol can, including an explosion-proof cover for an aerosol can, and the explosion-proof cover for an aerosol can is hermetically connected to the tank body to form an aerosol can.

[0015] One or more of the above technical solutions in the embodiments of the present invention have at least one of the following technical effects: 1. According to an explosion-proof cover for an aerosol can and an aerosol can using the same provided by the embodiments of the present invention, an inner lining is arranged in the cover body, and through the cooperation of the conical convex top area thereon and the explosion-proof ports, when the air pressure in the aerosol can reaches or exceeds the explosion threshold, the conical convex top area deforms preferentially compared with the cover body and acts on the cover body area at the explosion-proof port by means of propping, and combined with the design of multiple explosion-proof ports, it is ensured that when the air pressure in the aerosol can reaches or exceeds the explosion threshold, at least one explosion-proof port is timely torn to form a pressure relief gap, ensuring the instantaneous pressure relief effect, avoiding the occurrence of explosion, and improving the safety and reliability of the use of the aerosol can.

[0016] 2. According to an explosion-proof cover for an aerosol can and an aerosol can using the same provided by the embodiments of the present invention, at least one concave area is arranged in different areas of the cover body, combined with the uniform arrangement of several explosion-proof ports at the concave area, further improving the safety and reliability of the use of the aerosol can. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic cross-sectional structure view before the rolling seal connection of an explosion-proof cover for an aerosol can and a partial aerosol can provided by an embodiment of the present invention.

[0018] Figure 2 is Figure 1 the enlarged view of part A in

[0019] Figure 3 is a top view of an explosion-proof cover for an aerosol can provided by an embodiment of the present invention.

[0020] Figure 4 is a schematic structural view of the inner lining of an explosion-proof cover for an aerosol can provided by an embodiment of the present invention.

[0021] Figure 5 The invention is a schematic cross-sectional view of an explosion-proof cover of an aerosol can after being connected to a partial aerosol can roll seal.

[0022] In the figure: 1. cover body; 2. recessed area; 3. connection area; 4. explosion-proof port; 5. tank body; 6. lining; 61. fixed part one; 62. deformation part; 63. fixed part two; 7. conical convex top area; 8. nozzle. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0024] The explosion-proof cover of an aerosol can applied by the present invention is applied to an aerosol can. The explosion-proof cover of the aerosol can is sealed and connected with a can body 5 to form an aerosol can with an explosion-proof function.

[0025] See also Figure 1 , Figure 2 and Figure 3 The explosion-proof cover of the aerosol can comprises a nozzle 8 and a cover body 1. The cover body 1 is in a cone-shaped structure as a whole. A mounting port for mounting the nozzle 8 is provided at the top, and a connection area 3 for sealingly connecting with the can body 5 is provided at the bottom. A recessed area 2 is provided on the cover body 1, and an explosion-proof opening 4 is provided at the bottom of the recessed area 2. Figure 3As shown in the figure, the recessed areas 2 are in a ring structure, there are two of them, and they are distributed along the axial direction of the cover body 1. One recessed area 2 is close to the installation port, and the other recessed area 2 is close to the connection area 3. There are several explosion-proof ports 4, which are evenly distributed along the circumferential direction of the recessed area 2. The thickness of the cover body 1 at the explosion-proof ports 4 is less than the thickness of other areas of the cover body 1. When the air pressure in the aerosol can reaches or exceeds the explosion threshold, the cover body 1 deforms, and the explosion-proof ports 4 are torn during the deformation process to form pressure relief gaps. The air flow flows out through the pressure relief gaps, instantly reducing the air pressure in the aerosol can and preventing an explosion. The material of the cover body 1 is tinplate. By setting two recessed areas 2 and several explosion-proof ports 4 evenly distributed in the recessed areas 2, it is ensured that when the air pressure in the aerosol can reaches or exceeds the explosion threshold, at least one explosion-proof port 4 in the two recessed areas 2 can be torn in time to form a pressure relief gap, ensuring the instantaneous pressure relief effect and preventing an explosion. Among them, the explosion-proof ports 4 are formed into circular weak structures through a stamping process. For example, the basic thickness of the cover body 1 is set to 0.3 mm, and the thickness at the explosion-proof ports 4 is thinned to 0.06 mm after stamping treatment, and the preset circular weak structure is the explosion-proof port 4.

[0026] Refer to Figure 1 、 Figure 2 and Figure 3 , a lining 6 is provided inside the cover body 1. A conical convex top area 7 is provided on the lining 6. The conical convex top areas 7 correspond to the explosion-proof ports 4 one by one. The thickness of the lining 6 is between the thickness of the cover body 1 at the explosion-proof ports 4 and the basic thickness of the cover body 1. The material of the lining 6 is the same as that of the cover body 1. For example, if the basic thickness of the cover body 1 is set to 0.3 mm, the thickness of the lining 6 can be 0.1 - 0.2 mm. As Figure 2 shown, when the air pressure in the aerosol can reaches or exceeds the explosion threshold, the lining 6 deforms prior to the cover body 1 under the action of the internal pressure. The conical convex top areas 7 on the lining 6 will support the area of the cover body 1 in the explosion-proof ports 4 during deformation, assisting the explosion-proof ports 4 to tear, ensuring that when the air pressure in the aerosol can reaches or exceeds the explosion threshold, at least one explosion-proof port 4 can be torn in time to form a pressure relief gap for instantaneous pressure relief, ensuring the timeliness and reliability of pressure relief, and thus preventing the aerosol can body from exploding. Among them, the conical convex top areas 7 are cone-tip structures formed by one-way stamping.

[0027] Refer to Figure 1 and Figure 5 , the connection area 3 and the can body 5 are connected by a curling method using an existing curling machine. The number of curling layers of the curling method is three, so that the cover body 1 and the can body 5 are stably sealed and connected together, thereby ensuring the sealing performance between the cover body 1 and the can body 5.

[0028] Refer to Figure 1 and Figure 4, the inner lining 6 includes a first fixed part 61 fixed between the connection area 3 and the tank body 5, a deformed part 62 located inside the cover body 1 and along a part of the inner side wall of the cover body 1, and a second fixed part 63 fixed between the nozzle 8 and the cover body 1. Both the first fixed part 61 and the second fixed part 63 are annular structures. The deformed part 62 is a strip-shaped structure and is fixed between the first fixed part 61 and the second fixed part 63. The three form an integral whole. The number of the deformed parts 62 is several and they are evenly and spacedly distributed along the circumferential direction of the first fixed part 61. The strip-shaped deformed part 62 in the inner lining 6 can be obtained by punching with existing punching equipment. The conical convex top area 7 is located on the deformed part 62. The discontinuous design of several deformed parts 62 makes each deformed part 62 relatively independent. On the one hand, it will not affect the outflow of gas after the explosion-proof opening 4 is torn. After the explosion-proof opening 4 is torn, the gas in the tank body 5 can flow out through the opening between two adjacent deformed parts 6 and flow out from the explosion-proof opening 4 to achieve the pressure relief effect. On the other hand, the independent and discontinuous design structure of the deformed part 62 is beneficial to improving the deformation sensitivity of the deformed part 62. When the air pressure in the aerosol can reaches or exceeds the explosion threshold, only the conical convex top area 7 of any one of the deformed parts 62 needs to support the cover body 1 area at the explosion-proof opening 4 to assist the explosion-proof opening 4 to be torn for instantaneous pressure relief, so as to ensure that the torn explosion-proof opening 4 can quickly and timely perform instantaneous pressure relief on the aerosol can and avoid the explosion of the aerosol can.

[0029] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0030] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "connected", "installed" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, an integral connection, or a sliding connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. An explosion-proof cover for an aerosol can, comprising a nozzle, characterized in that: It also includes a cover body and an inner liner, wherein a nozzle is arranged on the top of the cover body, a recessed area and a connecting area are arranged on the cover body, a plurality of explosion-proof openings are arranged at the bottom of the recessed area, and the connecting area is sealed and connected to the tank body; The inner lining is fixed to the inner side of the cover, and a conical convex top area is provided on it. The conical convex top area corresponds to the position of the explosion-proof opening. When the pressure in the tank reaches or exceeds the explosion threshold, the inner lining and the conical convex top area deform first and support the explosion-proof opening, and at least one explosion-proof opening in the concave area is torn to form a pressure relief gap. The liner includes a fixed portion fixed between the connection area and the tank body and a deformed portion located in the cover body and along the inner side wall of the cover body, the deformed portion is in a discontinuous state in the circumferential direction, and the conical convex top area is located on the deformed portion; The cover body and the lining are made of the same material, and the thickness of the cover body, the thickness of the lining and the thickness of the cover body at the explosion-proof opening decrease in sequence.

2. The explosion-proof cover of an aerosol can according to claim 1, wherein: The recessed area is an annular structure, and the explosion-proof openings are evenly distributed along the circumference of the recessed area.

3. The explosion-proof cover of an aerosol can according to claim 2, characterized in that: The number of the recessed areas is not less than one and is distributed along the axial direction of the cover body.

4. The explosion-proof cover of an aerosol can according to claim 1, characterized in that: The connection area is connected to the tank body by crimping.

5. The explosion-proof cover of an aerosol can according to claim 1, characterized in that: The liner also includes a second fixing portion fixed between the nozzle and the cover body.

6. The explosion-proof cover of an aerosol can according to claim 4, characterized in that: The number of sealing layers in the sealing method shall not be less than three.

7. An aerosol can, characterized in that: The invention comprises an explosion-proof cover for an aerosol can according to any one of claims 1 to 6, wherein the explosion-proof cover for the aerosol can is sealedly connected to a can body to form an aerosol can.

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