Vacuum fresh-keeping equipment with self-sealing exhaust valve and preparation method of vacuum fresh-keeping equipment

Abstract

The invention relates to vacuum fresh-keeping equipment with a self-sealing exhaust valve, the vacuum fresh-keeping equipment comprises a first cover body and a second cover body which are made of silica gel materials, and the first cover body and the second cover body can be correspondingly embedded along an annular supporting sealing part to form a sealing structure; the first cover body is provided with a self-sealing exhaust valve protruding towards the outer side. The vacuum fresh-keeping equipment does not need an independent vacuumizing device, and manual exhaust is realized through the self-sealing exhaust valve by utilizing the scalability and elasticity of the soft silica gel in the middle of the cover body. The vacuum fresh-keeping equipment can be filled with various articles with different shapes and sizes, and is flexible to use and wide in application range. The invention further provides a preparation method of the vacuum fresh-keeping equipment with the self-sealing exhaust valve.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum preservation equipment, and in particular to a vacuum preservation equipment with a self-sealing exhaust valve and a preparation method thereof. Background Art

[0002] In production and life, food, medicine, etc. often need to be stored in a vacuum state, and many other items also often need to be stored under sealed or vacuum conditions.

[0003] Existing vacuum preservation equipment requires the use of an external vacuum device to extract the air inside the equipment to achieve a certain vacuum state inside the equipment. For example, existing vacuum preservation boxes are usually made of hard plastic and / or glass, including a box body and a lid. A sealing strip is set inside the lid, and an air extraction hole is set on the lid, which is used in conjunction with a vacuum device such as a vacuum pump. This vacuuming method is cumbersome to operate, and the vacuum pump is inconvenient to carry and is easy to lose or damage; in addition, hard plastic or glass materials are easy to break, causing leakage of contents and safety hazards.

[0004] In addition, the size and shape of the vacuum preservation device in the prior art cannot be changed, and the volume of the items loaded cannot exceed the fixed volume of the vacuum preservation device; and the vacuum preservation device has a fixed shape and can only be loaded with items that fit the shape of the inner cavity of the preservation device, which often causes a waste of space. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides a vacuum preservation device with a self-sealing exhaust valve. The device does not require a separate vacuum pumping device, and utilizes the scalability and elasticity of the soft silica gel in the middle of the cover body to manually exhaust air through a self-sealing exhaust valve provided on one side of the cover body; after stopping squeezing the exhaust valve, the exhaust port on the exhaust valve can automatically close and seal. The vacuum preservation device can be loaded with items of various shapes and sizes, and is flexible to use and has a wide range of applications. The present invention also provides a method for preparing the vacuum preservation device with a self-sealing exhaust valve.

[0006] In order to achieve the above-mentioned object, the first aspect of the present invention provides a vacuum preservation device with a self-sealing exhaust valve, the vacuum preservation device comprising a first cover body and a second cover body made of silicone material, the first cover body comprising a first accommodating portion and an annular first supporting sealing portion surrounding the first accommodating portion, the second cover body comprising a second accommodating portion and an annular second supporting sealing portion surrounding the second accommodating portion, the first supporting sealing portion and the second supporting sealing portion can be correspondingly engaged along an annular shape to form a sealing structure; wherein,

[0007] The first accommodating portion is provided with a self-sealing exhaust valve protruding outward, the self-sealing exhaust valve comprises an annular support portion and an arched top portion covering the annular support portion, a linear exhaust port is provided in the arched top portion, when both sides of the annular support portion are squeezed by external force, the exhaust port is opened to allow gas to pass through the exhaust valve; when both sides of the annular support portion are not squeezed by external force, the exhaust port is closed and sealed, and gas cannot pass through the exhaust valve; and,

[0008] The first supporting sealing portion, the second supporting sealing portion and the self-sealing exhaust valve are formed of hard silicone with a Shore hardness of 60-70 HA, and the first accommodating portion and the second accommodating portion are formed of soft silicone with a Shore hardness of 10-20 HA.

[0009] In a preferred embodiment, the first supporting sealing portion and the self-sealing exhaust valve are formed into a connected whole by silicone rubber of the same hardness.

[0010] Furthermore, the first cover body and the second cover body are integrally formed.

[0011] Furthermore, the wall thickness of the annular support portion is 3-5 times the center thickness of the arch top.

[0012] Furthermore, a truncated cone-shaped cavity is formed below the inner arched top of the self-sealing exhaust valve, and the bottom diameter of the truncated cone-shaped cavity is more than twice the top diameter.

[0013] Further, the thickness of the center of the arched top is 0.6-0.8mm, and the exhaust port passes through the center of the arched top and has a length of 5-12mm. Preferably, the thickness of the center of the arched top is 0.7mm, and the length of the exhaust port is 8-9mm.

[0014] In a preferred embodiment, the linear exhaust port is formed by cutting along the radial direction of the first cover body on the arched top.

[0015] Furthermore, a pair of arcuate shoulders are provided outside the junction of the annular support portion and the arched top of the self-sealing exhaust valve, and the arcuate shoulders are symmetrically arranged relative to the linear exhaust port.

[0016] Furthermore, a first opening portion is provided on the radial outer side of the first supporting sealing portion, and a second opening portion is provided on the radial outer side of the second supporting sealing portion. Preferably, both the first opening portion and the second opening portion have through holes.

[0017] The second aspect of the present invention provides a method for preparing the above-mentioned vacuum fresh-keeping device with a self-sealing exhaust valve, the method comprising the following steps:

[0018] (1) Material preparation: adding a vulcanizing agent to the raw silica gel, and mixing them into a soft rubber material for silica gel with a hardness of 10-20 HA and a hard rubber material for silica gel with a hardness of 60-70 HA; the raw silica gel is preferably food grade silica gel, and the vulcanizing agent is preferably food grade platinum vulcanizing agent;

[0019] (2) Mold feeding: Put the rubber sheet of soft rubber material in the middle of the mold, put the rubber sheet of hard rubber material at the edge of the mold, and put the rubber block of hard rubber material at the self-sealing exhaust valve;

[0020] (3) Pressing and demolding: Set the pressing temperature to 190-210°C, the vulcanization time to 180-220 seconds, and the pressure to 150-180 tons. After pressing, demold the product.

[0021] Preferably, in step (3), the pressing temperature is set to 200° C., the vulcanization time is set to 200 seconds, and the pressure is set to 150 tons.

[0022] In a preferred embodiment, the rubber sheet of the soft rubber material is a round rubber sheet with a weight of 20 g, a thickness of 1.2 mm, and a diameter of 95 mm.

[0023] In a preferred embodiment, the hard rubber sheet is a long strip of rubber sheet weighing 62g and having a length, width and height of 200mm, 19mm and 9mm respectively.

[0024] In a preferred embodiment, the rubber block of the hard rubber material is a spherical rubber block weighing 10 g.

[0025] Furthermore, the method further comprises:

[0026] (4) Secondary vulcanization: After the product is demoulded, it is placed in an oven and kept at 150°C for 30 minutes to complete disinfection and remove residual vulcanizing agent. The resulting product naturally cools to room temperature.

[0027] The beneficial effects of the present invention include:

[0028] 1. The device of the present invention does not require a separate vacuum pumping device. By utilizing the plasticity and elasticity of the soft silica gel in the middle of the cover body, manual exhaust is performed through a self-sealing exhaust valve provided on one side of the cover body, and the device can be used anytime and anywhere.

[0029] 2. The self-sealing exhaust valve has greater elasticity and self-sealing properties. After stopping squeezing the exhaust valve, the exhaust port on the exhaust valve can automatically close and seal. The exhaust valve can withstand a large external pressure without leaking air or causing the contents to leak.

[0030] 3. The hard silicone around the cover plays a role in bonding, supporting and sealing; the soft silicone in the middle has greater elasticity and expansion ratio (up to more than 400%), can accommodate items of various shapes and sizes, is flexible to use, and has a wide range of applications.

[0031] 4. The silicone material is safe and will not break and cause harm; it is small in size when idle and easy to carry and use.

[0032] 5. The production process of the present invention is mature, the material utilization rate is high, and it is easy to produce and control costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a top view of a vacuum preservation device according to one embodiment of the present invention.

[0034] Figure 2 It is a three-dimensional diagram of a vacuum preservation device according to one embodiment of the present invention.

[0035] Figure 3 Another perspective view of a vacuum preservation device according to an embodiment of the present invention.

[0036] Figure 4 This is a three-dimensional diagram of two separated covers of a vacuum preservation device in one embodiment of the present invention.

[0037] Figure 5 for Figure 1 Sectional view along AA direction.

[0038] Figure 6 for Figure 1 Cross-sectional view along the BB axis.

[0039] Figure 7 for Figure 1 Sectional view along CC direction.

[0040] Figure 8 for Figure 7 An enlarged schematic diagram of the self-sealing exhaust valve.

[0041] [Description of Reference Numerals]

[0042] 1- Vacuum preservation equipment;

[0043] 10-first cover; 11-first supporting sealing portion; 111-first opening portion; 12-first accommodating portion; 121-center of first accommodating portion; 13-self-sealing exhaust valve; 131-exhaust valve supporting portion; 132-exhaust valve arch top; 133-exhaust port; 134-truncated cone-shaped cavity; 135-arc-shaped shoulder;

[0044] 20 - second cover body; 21 - second supporting sealing portion; 211 - second opening portion; 22 - second accommodating portion; 221 - center of second accommodating portion. DETAILED DESCRIPTION

[0045] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0046] Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0047] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0050] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0051] Example 1

[0052] like Figure 1-4 As shown, a vacuum preservation device 1 with a self-sealing exhaust valve 13 in one embodiment of the present invention is shown. The vacuum preservation device 1 includes a first cover body 10 and a second cover body 20 made of silicone material. The first cover body 10 includes a first accommodating portion 12 and an annular first supporting sealing portion 11 surrounding the first accommodating portion 12. The second cover body 20 includes a second accommodating portion 22 and an annular second supporting sealing portion 21 surrounding the second accommodating portion 22. The first supporting sealing portion 11 and the second supporting sealing portion 21 can be correspondingly engaged along the annular shape to form a sealing structure. In this embodiment, the second supporting sealing portion 21 forms an upward annular protrusion structure; the first supporting sealing portion 11 forms an annular groove structure (not shown) with an opening downward and concave, and the annular protrusion structure and the annular groove structure can be correspondingly engaged to form a sealing structure.

[0053] The first accommodating portion 12 is provided with a self-sealing exhaust valve 13 protruding outward, and the self-sealing exhaust valve 13 includes an annular support portion 131 and an arched top portion 132 covering the annular support portion 131, and a linear exhaust port 133 is provided in the arched top portion 132. When both sides of the annular support portion 131 are squeezed by external force, the exhaust port 133 is opened to allow gas to pass through the exhaust valve 13; when both sides of the annular support portion 131 are not squeezed by external force, the exhaust port 133 is closed and sealed, and gas cannot pass through the exhaust valve 13.

[0054] The first support seal portion 11, the second support seal portion 21 and the self-sealing exhaust valve 13 are formed of hard silicone rubber with a Shore hardness of 70HA, and the first receiving portion 12 and the second receiving portion 22 are formed of soft silicone rubber with a Shore hardness of 20HA. In another embodiment, the first support seal portion 11, the second support seal portion 21 and the self-sealing exhaust valve 13 are formed of hard silicone rubber with a Shore hardness of 60HA, and the first receiving portion 12 and the second receiving portion 22 are formed of soft silicone rubber with a Shore hardness of 10HA.

[0055] Example 2

[0056] Reference Figure 5-6 On the basis of Example 1, the first supporting sealing portion 11 and the self-sealing exhaust valve 13 are formed of hard silicone with the same hardness of 70HA to form a connected whole, and the first cover body 10 and the second cover body 20 are integrally formed. Such a connection and integrally formed structure can provide better overall strength and facilitate the operation of squeezing the exhaust port 133 of the self-sealing exhaust valve 13 to open it.

[0057] Reference Figure 7-8, the wall thickness of the annular support portion 131 is three times the center thickness of the arched top portion 132. Accordingly, below the arched top portion 132 in the self-sealing exhaust valve 13 is a truncated cone-shaped cavity 134, and the bottom diameter of the truncated cone-shaped cavity 134 is twice the top diameter. Such a structure can give the self-sealing exhaust valve a better elastic modulus and self-sealing performance.

[0058] The thickness of the center of the arched top 132 is 0.7 mm, and the exhaust port 133 passes through the center of the arched top 132 and has a length of 8 mm. The linear exhaust port 133 is formed by cutting along the radial direction of the first cover 10 on the arched top 132. Therefore, the center depth of the linear exhaust port 133 is 0.7 mm.

[0059] Reference Figure 1-2 , 4, 8, a pair of arcuate shoulders 135 are provided outside the joint of the annular support portion 131 and the arched top portion 132 of the self-sealing exhaust valve 13, and the arcuate shoulders are symmetrically arranged relative to the linear exhaust port 133, forming a bracket shape. The arrangement of the arcuate shoulders 135 not only facilitates the extrusion operation of the exhaust valve, but also increases the elasticity and sealing of the exhaust valve.

[0060] A first opening portion 111 is provided radially outside the first supporting sealing portion 11; a second opening portion 211 is provided radially outside the second supporting sealing portion 21. The first opening portion 111 and the second opening portion 211 facilitate the application of force to separate the first cover body 10 and the second cover body 20. The first opening portion 111 and the second opening portion 211 are both provided with through holes, and the through holes are provided to facilitate the hanging of the vacuum preservation device.

[0061] Reference Figure 4-6 The first receiving portion 121 and the second receiving portion 221 formed by the pressing process are respectively left in the center of the first receiving portion 12 and the second receiving portion 22. Different colors or protrusions can be applied to the outside of the first receiving portion 121 and the second receiving portion 221 to facilitate distinguishing the inside and outside of the cover.

[0062] Example 3

[0063] The method for preparing the vacuum fresh-keeping device with a self-sealing exhaust valve of Example 1 comprises the following steps:

[0064] (1) Material preparation: Food-grade raw material silicone is added with food-grade platinum vulcanizer, and mixed into a soft rubber material for 20HA hardness silicone and a hard rubber material for 70HA hardness silicone;

[0065] (2) Mold feeding: Put the rubber sheet of soft rubber material in the middle of the mold, put the rubber sheet of hard rubber material at the edge of the mold, and put the rubber block of hard rubber material at the self-sealing exhaust valve;

[0066] The rubber sheet of soft rubber material is a circular rubber sheet with a weight of 20g, a thickness of 1.2mm and a diameter of 95mm; the rubber sheet of hard rubber material is a long strip rubber sheet with a weight of 62g and a length, width and height of 200mm, 19mm and 9mm respectively; the rubber block of hard rubber material is a spherical rubber block with a weight of 10g.

[0067] (3) Pressing and demolding: Set the pressing temperature to 200°C, the vulcanization time to 200 seconds, and the pressure to 150 tons. After pressing, demold the product.

[0068] (4) Secondary vulcanization: After the product is demoulded, it is placed in an oven and kept at 150°C for 30 minutes to complete disinfection and remove residual vulcanizing agent. The resulting product naturally cools to room temperature.

[0069] The vacuum preservation device of the present invention does not require a separate vacuum pumping device. It utilizes the plasticity and elasticity of the soft silica gel in the middle of the cover body and manually exhausts the air through a self-sealing exhaust valve arranged on one side of the cover body. It can be used anytime and anywhere. The middle soft silica gel has a large elasticity and expansion ratio (up to more than 400%), can accommodate items of various shapes and sizes, is flexible to use, and has a wide range of applications. The silica gel material is safe and will not break and cause harm. It is small in size when idle and is easy to carry and use. The production process of the present invention is mature, the material utilization rate is high, and it is easy to produce and control costs.

[0070] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A vacuum preservation device with a self-sealing exhaust valve, characterized in that: The vacuum preservation device comprises a first cover body and a second cover body made of silica gel, wherein the first cover body comprises a first accommodating portion and an annular first supporting sealing portion surrounding the first accommodating portion, and the second cover body comprises a second accommodating portion and an annular second supporting sealing portion surrounding the second accommodating portion, and the first supporting sealing portion and the second supporting sealing portion can be correspondingly engaged along an annular shape to form a sealing structure; wherein The first accommodating portion is provided with a self-sealing exhaust valve protruding outward, the self-sealing exhaust valve comprises an annular support portion and an arched top portion covering the annular support portion, a linear exhaust port is provided in the arched top portion, when both sides of the annular support portion are squeezed by external force, the exhaust port is opened to allow gas to pass through the exhaust valve; when both sides of the annular support portion are not squeezed by external force, the exhaust port is closed and sealed, and gas cannot pass through the exhaust valve; and, The first supporting sealing portion, the second supporting sealing portion and the self-sealing exhaust valve are formed of hard silicone with a Shore hardness of 60-70 HA, and the first accommodating portion and the second accommodating portion are formed of soft silicone with a Shore hardness of 10-20 HA.

2. The vacuum preservation device according to claim 1, characterized in that: The first supporting sealing portion and the self-sealing exhaust valve are formed into a connected whole by silicone rubber of the same hardness; and the first cover body and the second cover body are both integrally formed.

3. The vacuum preservation device according to claim 1, characterized in that: The wall thickness of the annular support portion is 3-5 times the center thickness of the arch top.

4. The vacuum preservation device according to claim 3, characterized in that: A truncated cone-shaped cavity is located below the inner arched top of the self-sealing exhaust valve, and the bottom diameter of the truncated cone-shaped cavity is more than twice the top diameter.

5. The vacuum preservation device according to claim 4, characterized in that: The thickness of the center of the arched top is 0.6-0.8 mm, and the exhaust port passes through the center of the arched top and has a length of 5-12 mm.

6. The vacuum preservation device according to claim 1, characterized in that: The linear exhaust port is formed by cutting along the radial direction of the first cover body on the arched top.

7. The vacuum preservation device according to claim 6, characterized in that: A pair of arcuate shoulders are provided outside the junction of the annular support portion and the arched top of the self-sealing exhaust valve, and the arcuate shoulders are symmetrically arranged relative to the linear exhaust port.

8. The method for preparing the vacuum fresh-keeping device with a self-sealing exhaust valve according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: (1) Material preparation: adding a vulcanizing agent to the raw silica gel, and mixing them into a soft rubber material for silica gel with a hardness of 10-20 HA and a hard rubber material for silica gel with a hardness of 60-70 HA; the raw silica gel is preferably food grade silica gel, and the vulcanizing agent is preferably food grade platinum vulcanizing agent; (2) Mold feeding: Put the rubber sheet of soft rubber material in the middle of the mold, put the rubber sheet of hard rubber material at the edge of the mold, and put the rubber block of hard rubber material at the self-sealing exhaust valve; (3) Pressing and demolding: Set the pressing temperature to 190-210°C, the vulcanization time to 180-220 seconds, and the pressure to 150-180 tons. After pressing, demold the product.

9. The method according to claim 8, characterized in that The rubber sheet of the soft rubber material is a circular rubber sheet with a weight of 20g, a thickness of 1.2mm and a diameter of 95mm; the rubber sheet of the hard rubber material is a long strip rubber sheet with a weight of 62g and a length, width and height of 200mm, 19mm and 9mm respectively; the rubber block of the hard rubber material is a spherical rubber block with a weight of 10g.

10. The method according to claim 8, characterized in that The method further comprises: (4) Secondary vulcanization: After the product is demoulded, it is placed in an oven and kept at 150°C for 30 minutes to complete disinfection and remove residual vulcanizing agent. The resulting product naturally cools to room temperature.

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