Vacuum sealing cover and sealing tank

Abstract

The utility model provides a vacuum sealing cover and a sealing tank, the vacuum sealing cover comprises a cover body, a date assembly, an air exhaust assembly, a pressure relief assembly and a limiting assembly, the date assembly comprises a month rotating disc and a day number rotating disc, the day number rotating disc is arranged on the cover body in a surrounding mode, the month rotating disc is arranged on the air exhaust assembly, and the pressure relief assembly is provided with a first pointer area and a second pointer area; the vacuum sealing cover further comprises a limiting assembly, and the limiting assembly comprises a first limiting component and a second limiting component. After food is put into the sealing tank, the month rotating disc and the day rotating disc are rotated to generate rotation feedback actions during rotation, and when the specific numbers of the month rotating disc and the day rotating disc point to the end of the pressure relief assembly at the same time, the first limiting part is clamped in the first limiting tooth groove, and the second limiting part is clamped in the second limiting tooth groove. The second limiting part is clamped in the second limiting tooth groove so as to accurately record the storage date of the food; and the month turntable and the day turntable are not easy to rotate due to accidental touch, so that the accuracy of food storage dates is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of sealed storage, and in particular to a vacuum sealed cover and a sealed can. Background Art

[0002] A sealed can is a container for sealing and preserving items. It is used to seal and preserve food. Different types of sealed cans are available in the existing market to vacuum preserve foods such as meat, vegetables and fruits, pickles, dry goods, powders, solid beverages, etc., so that they are not easily oxidized or deteriorated due to moisture.

[0003] However, when food in a sealed can is stored for a long period of time, it is easy for the user to forget the time when the food was placed in the sealed can, making it difficult to determine the shelf life of the food, thereby causing the food to go bad due to missing the best-before date.

[0004] In response to the above problems, the existing patent CN205916561U discloses a sealed can, in which the can cover is provided with an air pump and a date display. The date display is arranged on the surface of the can cover. The date display located on the surface of the can cover can display the sealing date, which is convenient for users to check. A rotatable turntable is provided on the date display. The turntable is provided with a scale of months and numbers "1" to "31" and a pointer around the center. The sealing date can be recorded by rotating the digital scale on the turntable to the pointer position.

[0005] However, when the user accidentally touches or even rotates the turntable, it is easy to rotate the month part or the scale part from "1" to "31" in the turntable by a certain angle, causing a deviation between the actual storage date of the food and the date on the date display, which will cause the user to mistakenly believe that the date on the date display is the storage date of the food. Utility Model Content

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a vacuum sealed lid and sealed can that can accurately record the storage date and whose date components are not affected by accidental contact.

[0007] The purpose of this disclosure is achieved through the following technical solutions:

[0008] A vacuum sealing cover, used for pressing down and sealing the opening of a can body, comprises a cover body, a date component, an air extraction component and a pressure relief component, wherein the cover body is provided with an air extraction cavity, a part of the structure of the air extraction component is located in the air extraction cavity, the air extraction component is used for sucking the gas in the can body to the outside through the air extraction cavity, the pressure relief component is embedded in the cover body, and the pressure relief component is used for restoring the gas pressure in the can body to normal pressure;

[0009] The date component includes a month turntable and a day turntable. The day turntable is disposed around the cover body. The month turntable is disposed on the air extraction component. The pressure relief component has a pointer area one and a pointer area two. The pointer area one is used to point to the specific month of the month turntable, and the pointer area two is used to point to the specific day of the day turntable, so as to accurately record the storage date of the food.

[0010] The vacuum sealing cover further includes a limiting component. The limiting component includes a first limiting part and a second limiting part. The month turntable is provided with a first limiting groove. The inner wall of the air extraction component is provided with a plurality of first limiting tooth grooves around it. Each first limiting tooth groove corresponds to a specific month. The first limiting part is located in the first limiting groove and abuts against one of the first limiting tooth grooves. The cover body is provided with a second limiting groove. The inner side of the day turntable is provided with a plurality of second limiting tooth grooves. Each second limiting tooth groove corresponds to a specific day. The second limiting part is located in the second limiting groove and abuts against one of the second limiting tooth grooves.

[0011] In one embodiment, the vacuum sealing cover further includes an induction meter. The induction meter is disposed on the month turntable. The month turntable is provided with an induction through hole. The air extraction cavity, the induction through hole and the induction area of the induction meter are sequentially communicated, so that the induction meter displays the state information inside the tank body.

[0012] In one embodiment, the induction meter is a humidity sensor.

[0013] In one embodiment, the cover body is further provided with a pressure relief cavity. The pressure relief cavity is communicated with the air extraction cavity. A part of the structure of the pressure relief component is located in the pressure relief cavity.

[0014] In one embodiment, the pressure relief component includes a pressure relief piece, a pressure relief spring and a pressure relief sealing ring. The pressure relief cavity includes a first pressure relief channel, a pressure relief sealing port and a second pressure relief channel that are sequentially communicated. The second pressure relief channel is also communicated with the air extraction cavity. The pressure relief piece sequentially passes through the first pressure relief channel and the pressure relief sealing port and is located in the second pressure relief channel. The pressure relief spring is disposed around the outer wall of the pressure relief piece and is located in the first pressure relief channel. The pressure relief sealing ring is disposed around the outer wall of the pressure relief piece and is located in the second pressure relief channel to block the pressure relief sealing port.

[0015] In one embodiment, the pressure relief piece is provided with an avoidance notch. The pressure relief sealing ring abuts against the inner peripheral wall of the pressure relief sealing port and the avoidance notch at the same time to block the pressure relief sealing port.

[0016] In one embodiment, the second limiting member includes a days limiting member and a days limiting spring. The days limiting member and the days limiting spring are both located in the second limiting groove. Two ends of the days limiting member respectively abut against one end of the days limiting spring and any one of the second limiting tooth grooves, and the other end of the days limiting spring abuts against the bottom of the second limiting groove.

[0017] In one embodiment, the vacuum sealing cover further includes a sealing gasket. The sealing gasket is disposed around the inner peripheral side of the cover body and faces the opening of the tank body. The sealing gasket is used for press-fittingly abutting against the periphery of the opening of the tank body so that the vacuum sealing cover is sealingly screwed to the opening of the tank body.

[0018] A sealed can includes a tank body and the vacuum sealing cover according to any one of the above embodiments. The vacuum sealing cover presses down to seal the opening of the tank body so that the tank body and the vacuum sealing cover are completely closed, and the inner cavity of the tank body communicates with the air extraction cavity through the opening of the tank body.

[0019] In one embodiment, a sealing convex ring protrudes from the outer peripheral side of the sealing gasket of the vacuum sealing cover, and a sealing groove is formed in the inner peripheral side of the opening. The sealing convex ring press-fits against the sealing groove.

[0020] Compared with the prior art, the present disclosure has at least the following advantages:

[0021] After putting food into the sealed can, rotate the month turntable and the days turntable so that the month turntable and the days turntable generate a rotation feedback action when rotating. When the specific numbers of the month turntable and the days turntable simultaneously point to the end of the pressure relief component, the first limiting member is stuck in the first limiting tooth groove, and the second limiting member is stuck in the second limiting tooth groove to accurately record the storage date of the food; the month turntable and the days turntable are not easily rotated due to accidental touch under the action of the first limiting member and the second limiting member, ensuring the accuracy of the food storage date. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic structural diagram of a vacuum sealing cover in an embodiment;

[0024] Figure 2 For Figure 1Top view of the vacuum sealing cover shown;

[0025] Figure 3 is Figure 1 Partial structural schematic diagram of the vacuum sealing cover shown;

[0026] Figure 4 is Figure 3 Partial structural schematic diagram of the vacuum sealing cover shown;

[0027] Figure 5 is Figure 1 Structural diagram of the day dial of the date component in the vacuum sealing cover shown;

[0028] Figure 6 is Figure 1 Another partial structural schematic diagram of the vacuum sealing cover shown;

[0029] Figure 7 is Figure 1 Structural sectional view of the vacuum sealing cover shown;

[0030] Figure 8 is Figure 7 Partial enlarged view of the vacuum sealing cover at A shown;

[0031] Figure 9 is Figure 7 Partial enlarged view of the vacuum sealing cover at B shown;

[0032] Figure 10 Structural schematic diagram of the sealed can of another embodiment of the present disclosure.

[0033] Reference numerals: 10, vacuum sealing cover; 100, cover body; 101, air extraction chamber; 102, second limiting groove; 103, pressure relief chamber; 1031, first pressure relief passage; 1032, pressure relief sealing port; 1033, second pressure relief passage; 200, date component; 210, month dial; 211, first limiting groove; 212, induction through hole; 220, day dial; 221, second limiting tooth groove; 300, air extraction component; 310, first limiting tooth groove; 400, pressure relief component; 401, pointer area one; 402, pointer area two; 410, pressure relief member; 411, avoidance notch; 420, pressure relief spring; 430, pressure relief sealing ring; 500, limiting component; 510, first limiting member; 520, second limiting member; 521, day limiting member; 522, day limiting spring; 600, induction table; 700, sealing gasket; 710, sealing convex ring; 20, sealed can; 21, can body. Detailed implementation manners

[0034] To facilitate the understanding of the present disclosure, the present disclosure will be described more comprehensively below with reference to the relevant accompanying drawings. The preferred embodiments of the present disclosure are shown in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure content of the present disclosure more thorough and comprehensive.

[0035] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present disclosure belongs. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0037] To better understand the technical solutions and beneficial effects of the present disclosure, the present disclosure will be further described in detail below with specific embodiments:

[0038] As Figures 1 to 4 shown, it is a vacuum sealing cover 10 of an embodiment of the present utility model, which is used to press down and seal the opening of the tank body 21. The vacuum sealing cover 10 includes a cover body 100, a date component 200, an air extraction component 300, a pressure relief component 400 and a limit component 500.

[0039] As Figure 1 , Figure 3 and Figure 7 shown, the cover body 100 is provided with an air extraction cavity 101. A part of the structure of the air extraction component 300 is located in the air extraction cavity 101, and the rest is exposed to the outside. The air extraction component 300 is used to suck the gas in the tank body 21 to the outside through the air extraction cavity 101. The pressure relief component 400 is embedded in the cover body 100, and the pressure relief component 400 is used to restore the air pressure in the tank body 21 to normal pressure, as shown in combination with Figure 7 and Figure 10 shown. It can be understood that when it is necessary to extract the air in the tank body 21, the air can be extracted to the outside through the air extraction cavity 101 by pressing the air extraction component 300 multiple times, so that the inside of the tank body 21 is in a vacuum state. When it is necessary to restore the normal pressure, the pressure relief component 400 can be long-pressed to restore the air pressure inside the tank body 21.

[0040] AsFigure 1 and Figure 2 As shown, the date component 200 includes a month turntable 210 and a day turntable 220. The day turntable 220 is disposed around the cover 100, and the month turntable 210 is disposed on the air extraction component 300. The pressure relief component 400 has a pointer area 401 and a pointer area 402. The pointer area 401 is used to point to the specific month of the month turntable 210, and the pointer area 402 is used to point to the specific day of the day turntable 220, so as to accurately record the storage date of the food. In this embodiment, the month turntable 210 is provided with scales from "1" to "12", and the day turntable 220 is provided with scales from "1" to "31" (only 31 punctuation marks are used to represent "1" to "31" in the figure).

[0041] As Figure 3 shown, the limiting component 500 includes a first limiting member 510 and a second limiting member 520.

[0042] Combined with Figure 4 、 Figure 6 、 Figure 7 and Figure 8 As shown, the month turntable 210 is provided with a first limiting groove 211, and the inner wall of the air extraction component 300 is provided with a plurality of first limiting tooth grooves 310 around it. Each first limiting tooth groove 310 corresponds to a specific month. The first limiting member 510 is located in the first limiting groove 211 and abuts against one of the first limiting tooth grooves 310.

[0043] Combined with Figure 4 、 Figure 5 、 the 7th and Figure 9 As shown, the cover 100 is provided with a second limiting groove 102, and the inner side of the day turntable 220 is provided with a plurality of second limiting tooth grooves 221. Each second limiting tooth groove 221 corresponds to a specific day. The second limiting member 520 is located in the second limiting groove 102 and abuts against one of the second limiting tooth grooves 221. In this embodiment, the abutment is an elastic abutment, so that the month turntable 210 and the day turntable 220 have a better feedback effect when rotating. When the first limiting member 510 abuts in the first limiting tooth groove 310, the pointer area 401 accurately points to the specific number of the month turntable 210. When the second limiting member 520 abuts in the second limiting tooth groove 221, the pointer area 402 accurately points to the specific number of the day turntable 220.

[0044] In this embodiment, after the food is placed in the sealed can 20, the month dial 210 and the day dial 220 are rotated so that the month dial 210 and the day dial 220 generate a rotation feedback action when rotating. When the specific numbers of the month dial 210 and the day dial 220 simultaneously point to the end of the pressure relief assembly 400, the first limiting component 510 is stuck in the first limiting tooth groove 310, and the second limiting component 520 is stuck in the second limiting tooth groove 221 to accurately record the storage date of the food; the month dial 210 and the day dial 220 will not rotate easily due to accidental contact under the action of the first limiting component 510 and the second limiting component 520, thereby ensuring the accuracy of the food storage date.

[0045] like Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, in one embodiment, the vacuum sealing cover 10 further includes a sensor meter 600, which is arranged on the month turntable 210. The month turntable 210 is provided with a sensor through hole 212. The air extraction cavity 101, the sensor through hole 212 and the sensor area of ​​the sensor meter 600 are sequentially connected, so that the sensor meter 600 displays the status information inside the tank body 21. Specifically, the sensor meter 600 is adhered to the month turntable 210 by double-sided adhesive. In this embodiment, the sensor meter 600 is a humidity sensor, which is used to detect the water vapor in the tank body 21. The water vapor in the tank passes through the air extraction cavity 101 and the sensor through hole 212 in sequence, so that the humidity sensor displays the current humidity in the tank body 21 through the internal pointer, so that it can be determined whether the food is susceptible to moisture according to the humidity in the tank body 21.

[0046] like Figure 7 As shown, in one embodiment, the cover body 100 is further provided with a pressure relief chamber 103, the pressure relief chamber 103 is communicated with the air extraction chamber 101, and part of the pressure relief assembly 400 is located in the pressure relief chamber 103. Figure 9 As shown, the pressure relief assembly 400 includes a pressure relief component 410, a pressure relief spring 420 and a pressure relief sealing ring 430. The pressure relief chamber 103 includes a first pressure relief channel 1031, a pressure relief sealing port 1032 and a second pressure relief channel 1033 which are sequentially connected. The second pressure relief channel 1033 is also connected to the air pumping chamber 101. The pressure relief component 410 is sequentially penetrated through the first pressure relief channel 1031 and the pressure relief sealing port 1032 and is located in the second pressure relief channel 1033. The pressure relief spring 420 is arranged around the outer wall of the pressure relief component 410 and is located in the first pressure relief channel 1031. The pressure relief sealing ring 430 is arranged around the outer wall of the pressure relief component 410 and is located in the second pressure relief channel 1033 to seal the pressure relief sealing port 1032.

[0047] It can be understood that when it is necessary to restore the air pressure in the tank body 21 to normal pressure, long-press the pressure relief member 410 to cause the pressure relief spring 420 to undergo compressive deformation. At this time, the pressure relief sealing ring 430 no longer blocks the pressure relief sealing port 1032, so that external air sequentially enters the tank body 21 through the first pressure relief channel 1031, the pressure relief sealing port 1032 and the second pressure relief channel 1033, thereby achieving the effect of restoring the normal pressure state in the tank body 21.

[0048] Further, as Figure 9 shown, the pressure relief member 410 is provided with an avoidance notch 411, and the pressure relief sealing ring 430 abuts against the inner peripheral wall of the pressure relief sealing port 1032 and the avoidance notch 411 at the same time to block the pressure relief sealing port 1032. It can be understood that when the pressure relief member 410 is pressed, under the action of the pressure relief spring 420, the avoidance notch 411 guides the pressure relief sealing ring 430 to abut against the inner wall of the pressure relief sealing port 1032; when the pressure relief member 410 is pressed, the avoidance notch 411 guides the pressure relief sealing ring 430 away from the pressure relief sealing port 1032, so that external air enters the tank body 21. After the normal pressure is restored, release the pressure relief member 410. Under the action of the pressure relief spring 420, the avoidance notch 411 guides the pressure relief sealing ring 430 to abut against the inner wall of the pressure relief sealing port 1032 again to play a sealing role and prevent the air in the tank body 21 from flowing with the external air.

[0049] As Figure 7 and Figure 9 shown, in one embodiment, the second limiting member 520 includes a number-of-days limiting member 521 and a number-of-days limiting spring 522. The number-of-days limiting member 521 and the number-of-days limiting spring 522 are both located in the second limiting groove 102. The two ends of the number-of-days limiting member 521 respectively abut against one end of the number-of-days limiting spring 522 and any one of the second limiting tooth grooves 221, and the other end of the number-of-days limiting spring 522 abuts against the bottom of the second limiting groove 102. It can be understood that when the number-of-days turntable 220 is rotated, the second limiting tooth groove 221 rotates with the number-of-days turntable 220. At this time, the number-of-days limiting spring 522 continuously undergoes telescopic deformation, and the number-of-days limiting member 521 cyclically abuts against the tops and bottoms of multiple second limiting tooth grooves 221. When the pointer second area 402 accurately points to the value of the number-of-days turntable 220, the number-of-days limiting member 521 abuts against one of the second limiting tooth grooves 221 to play a limiting role and is not easily misrotated due to accidental touch.

[0050] As Figure 7As shown, in one embodiment, the vacuum sealing cover 10 further includes a sealing ring 700. The sealing ring 700 is disposed around the inner peripheral side of the cover body 100 and faces the opening of the tank body 21. The sealing ring 700 is used to press-fit against the periphery of the opening of the tank body 21, so that the vacuum sealing cover 10 is screwed and sealed to the opening of the tank body 21. It can be understood that when the vacuum sealing cover 10 is pressed down on the opening of the tank body 21, the vacuum sealing cover 10 presses against the periphery of the opening of the tank body 21 through the sealing ring 700, so as to achieve the effect of blocking the opening of the tank body 21 and prevent external air from entering the tank body 21.

[0051] As Figure 10 shown, the present disclosure also provides a sealed tank 20, which includes a tank body 21 and the vacuum sealing cover 10 of any one of the above embodiments. The vacuum sealing cover 10 presses down to seal the opening of the tank body 21, so that the tank body 21 and the vacuum sealing cover 10 are completely closed. The inner cavity of the tank body 21 is communicated with the air extraction cavity 101 through the opening of the tank body 21. It can be understood that when air extraction operation is required, the air in the tank body 21 can be pumped out through the air extraction cavity 101 by pressing the air extraction assembly 300 multiple times; when it is required to restore the normal pressure of the tank body 21, the pressure relief assembly 400 can be long-pressed to allow external air to enter the tank body 21. In a general state, the vacuum sealing cover 10 is completely closed with the tank body 21 through the sealing ring 700, and air will not flow out of the tank body 21, and external air will not enter the tank body 21. In this embodiment, the tank body 21 is made of glass or metal.

[0052] Further, a sealing convex ring 710 is protruded on the outer peripheral side of the sealing ring 700 of the vacuum sealing cover 10, and a sealing groove (not shown) is opened on the inner peripheral side of the opening. The sealing convex ring 710 is press-fitted against the sealing groove. It can be understood that the vacuum sealing cover 10 is completely closed with the tank body 21 through the sealing ring 700, and the sealing convex ring 710 is press-fitted against the sealing groove to play a sealing and limiting role, so as to further prevent external air from entering the tank body 21 in a sealed state. Further, when the vacuum sealing cover 10 is opened, only manual lifting is required, and the sealing convex ring 710 moves away from the sealing groove, thus completing the opening action; when it is required to cover the vacuum sealing cover 10, the vacuum sealing cover 10 is pressed down to seal the tank body 21 to block the opening, the sealing convex ring 710 moves towards the sealing groove and is press-fitted against the sealing groove, and at the same time the sealing ring 700 presses against the periphery of the opening of the tank body 21, thus completing the action of completely closing the vacuum sealing cover 10 and the tank body 21.

[0053] Compared with the prior art, the present disclosure has at least the following advantages:

[0054] After putting food into the sealed container 20, rotate the month dial 210 and the day dial 220 so that the month dial 210 and the day dial 220 generate rotational feedback actions when rotating. When the specific numbers of the month dial 210 and the day dial 220 simultaneously point to the end of the pressure relief component 400, the first limiting member 510 is stuck in the first limiting tooth groove 310, and the second limiting member 520 is stuck in the second limiting tooth groove 221 to accurately record the storage date of the food; the month dial 210 and the day dial 220 are not easily rotated due to accidental touch under the action of the first limiting member 510 and the second limiting member 520, ensuring the accuracy of the food storage date.

[0055] The above embodiments only represent several implementation manners of the present disclosure, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the disclosed patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present disclosure, several deformations and improvements can still be made, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure patent shall be subject to the appended claims.

Claims

1. A vacuum sealing cover for pressing down to seal the opening of a tank body, comprising a cover body, a date component, an air extraction component and a pressure relief component. The cover body is provided with an air extraction cavity, and part of the structure of the air extraction component is located in the air extraction cavity. The air extraction component is used to suck the gas in the tank body to the outside through the air extraction cavity. The pressure relief component is embedded in the cover body and is used to restore the air pressure in the tank body to normal pressure. It is characterized in that the date component includes a month turntable and a day turntable. The day turntable is arranged around the cover body, and the month turntable is arranged on the air extraction component. The pressure relief component has a pointer area one and a pointer area two. The pointer area one is used to point to the specific month of the month turntable, and the pointer area two is used to point to the specific day of the day turntable to accurately record the storage date of food; the vacuum sealing cover further includes a limiting component, which includes a first limiting part and a second limiting part. The month turntable is provided with a first limiting groove, and a plurality of first limiting tooth grooves are arranged around the inner wall of the air extraction component. Each first limiting tooth groove corresponds to a specific month. The first limiting part is located in the first limiting groove and abuts against one of the first limiting tooth grooves. The cover body is provided with a second limiting groove, and a plurality of second limiting tooth grooves are arranged on the inner side of the day turntable. Each second limiting tooth groove corresponds to a specific day. The second limiting part is located in the second limiting groove and abuts against one of the second limiting tooth grooves.

2. The vacuum sealing cover according to claim 1, wherein the vacuum sealing cover further includes an induction meter, which is arranged on the month turntable. The month turntable is provided with an induction through hole, and the air extraction cavity, the induction through hole and the induction area of the induction meter are sequentially communicated, so that the induction meter displays the state information inside the tank body.

3. The vacuum sealing cover according to claim 2, characterized in that, The induction meter is a humidity sensor.

4. The vacuum sealing cover according to claim 1, characterized in that, The cover body is further provided with a pressure relief cavity, which is communicated with the air extraction cavity, and part of the structure of the pressure relief component is located in the pressure relief cavity.

5. The vacuum sealing cover according to claim 4, wherein, The pressure relief component includes a pressure relief piece, a pressure relief spring and a pressure relief sealing ring. The pressure relief cavity includes a first pressure relief channel, a pressure relief sealing port and a second pressure relief channel that are sequentially communicated. The second pressure relief channel is also communicated with the air extraction cavity. The pressure relief piece sequentially passes through the first pressure relief channel and the pressure relief sealing port and is located in the second pressure relief channel. The pressure relief spring is arranged around the outer wall of the pressure relief piece and is located in the first pressure relief channel. The pressure relief sealing ring is arranged around the outer wall of the pressure relief piece and is located in the second pressure relief channel to block the pressure relief sealing port.

6. The vacuum sealing cover according to claim 5, wherein The pressure relief piece is provided with an avoidance notch, and the pressure relief sealing ring abuts against the inner peripheral wall of the pressure relief sealing port and the avoidance notch at the same time to block the pressure relief sealing port.

7. The vacuum sealing cover according to claim 1, wherein The second limiting part includes a day limiting piece and a day limiting spring. The day limiting piece and the day limiting spring are both located in the second limiting groove. The two ends of the day limiting piece respectively abut against one end of the day limiting spring and any one of the second limiting tooth grooves, and the other end of the day limiting spring abuts against the bottom of the second limiting groove.

8. The vacuum sealing cover according to claim 1, wherein, The vacuum sealing cover further includes a sealing ring, which is disposed around the inner peripheral side of the cover body and faces the opening of the tank body. The sealing ring is used for interference-fitting against the periphery of the opening of the tank body, so that the vacuum sealing cover is screwed and sealed on the opening of the tank body.

9. A sealed tank, characterized in that, It includes a tank body and the vacuum sealing cover according to any one of claims 1-8. The vacuum sealing cover presses down to seal the opening of the tank body, so that the tank body and the vacuum sealing cover are completely closed. The inner cavity of the tank body is communicated with the air extraction cavity through the opening of the tank body.

10. The sealed can according to claim 9, characterized in that, A sealing convex ring is protruded on the outer peripheral side of the sealing ring of the vacuum sealing cover, and a sealing groove is formed on the inner peripheral side of the opening. The sealing convex ring is interference-fitted against the sealing groove.

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