A tank cover structure for a vacuum tank

Abstract

The present invention discloses a lid structure of a vacuum tank, which includes a lid body and a handle. An air extraction hole is provided on the lid body. The handle passes through the air extraction hole and there is an air extraction channel left between the handle and the inner side wall of the air extraction hole. A hand-held part is provided at the upper part of the handle, and a lifting convex block for lifting the lid body is provided at the lower part of the handle. A sealing soft film is provided on the handle, which can press against the upper surface of the lid body to close the upper port of the air extraction channel. In the present invention, the handle on the lid body has both the functions of an air extraction check valve and a lid handle of the tank, with diverse functions, which is beneficial to streamlining the structure of the lid and reducing production costs.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum tanks, and in particular to a tank cover structure of a vacuum tank. Background Art

[0002] Vacuum tanks, also called vacuum storage tanks, are used to store items that are susceptible to moisture, oxidation, and mildew. The sealing material is generally made of high-performance natural silica gel, which can ensure that the vacuum tank maintains a high vacuum state for a long time, thereby playing the role of anti-oxidation, moisture-proof, moth-proof, mildew-proof, and preservation. The method of using a vacuum tank is: install the vacuum extractor on the tank cover of the vacuum tank, align it with the air extraction port on the tank cover, seal it with the sealing ring, and then start the vacuum pump in the vacuum extractor to extract the air in the tank through the one-way valve at the air extraction port to form a vacuum state.

[0003] In traditional vacuum tanks, the exhaust port and the handle on the tank cover are separately arranged. The handle only has the function of facilitating the lifting and opening of the tank cover. When producing the tank cover, the above two structures need to be formed separately, and a one-way valve needs to be set at the exhaust port, which increases the mold opening cost. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a tank cover structure for a vacuum tank, in which a handle is cooperatively installed at the inflation port, and has the functions of lifting and opening the tank cover and providing one-way air extraction for the vacuum device.

[0005] The technical solution adopted by the present invention to solve the technical problem is:

[0006] A can lid structure for a vacuum can, comprising a cover body and a handle, wherein the cover body is provided with an exhaust hole, the handle passes through the exhaust hole and an exhaust channel is left between the handle and the inner wall of the exhaust hole, the upper portion of the handle is provided with a carrying portion, the lower portion of the handle is provided with a lifting protrusion for lifting the cover body, and the handle is provided with a sealing soft plastic film that can be pressed against the upper surface of the cover body to close the upper port of the exhaust channel.

[0007] In a preferred embodiment of the present invention, the lifting protrusion shields the lower port of the air extraction channel, and an air guide channel communicated with the air extraction channel is provided between the lifting protrusion and the lower surface of the cover body.

[0008] In a preferred embodiment of the present invention, a plurality of support blocks capable of abutting against the lifting protrusion are disposed on the lower surface of the cover body, and the spaces between different support blocks form the air guide channel.

[0009] In a preferred embodiment of the present invention, the handle, lifting protrusion and sealing soft rubber sheet are an integrated soft rubber structure, and the handle is provided with vertical blind holes so that the sealing soft rubber sheet can be driven to separate from the upper surface of the cover body when the two sides of the handle are squeezed.

[0010] In a preferred embodiment of the present invention, a hard auxiliary lifting plate is detachably installed inside the lifting bump.

[0011] In a preferred embodiment of the present invention, the air extraction hole is a round hole, the auxiliary lifting plate is a round plate and the diameter of the auxiliary lifting plate is larger than the diameter of the air extraction hole.

[0012] In a preferred embodiment of the present invention, the vertical blind hole includes a first blind hole with an opening facing downwards, a clamping groove is provided on the inner side wall of the first blind hole, and the auxiliary lifting plate is clamped in the clamping groove.

[0013] In a preferred embodiment of the present invention, the auxiliary lifting plate divides the first blind hole into an upper hole section and a lower hole section, and a through hole for communicating the upper hole section and the lower hole section is provided on the auxiliary lifting plate.

[0014] In a preferred embodiment of the present invention, the vertical blind hole further includes a second blind hole with an opening facing upwards, and a partition for separating the first blind hole and the second blind hole is provided on the handle.

[0015] In a preferred embodiment of the present invention, a concave position is provided in the middle of the cover body, the air extraction hole is provided at the bottom of the concave position, and the handle part and the sealing soft film are both received in the concave position.

[0016] In a preferred embodiment of the present invention, a plurality of annular ribs for abutting against the upper surface of the cover body are provided on the lower surface of the sealing soft film.

[0017] In a preferred embodiment of the present invention, an annular rib surrounding the air extraction hole and abutting against the lower surface of the sealing soft film is provided on the upper surface of the cover body.

[0018] The beneficial effects of the present invention are:

[0019] 1. For the vacuum tank with this tank lid structure, when the air pressure inside the tank is balanced with the external air pressure, the user can open the lid by holding the handle. When using a vacuum pump to evacuate the air, turn on the vacuum pump of the vacuum pump, and first evacuate the air between the vacuum pump and the lid. Then, a pressure difference is formed between the space inside the tank and the space inside the recess, causing the sealing soft film to turn upwards and separate from the upper surface of the lid, and the air inside the tank can be evacuated. When the vacuum degree inside the tank reaches the requirement, the vacuum pump stops, and then the pressure relief valve on the vacuum pump can be opened, or the vacuum pump can be directly removed to make the space inside the recess in pressure balance with the external space. During this process, a pressure difference is formed again between the space inside the tank and the space inside the recess, and this pressure difference will cause the sealing soft film to turn downwards and press tightly on the upper surface of the lid, closing the upper port of the air extraction channel, so that the inside of the tank can maintain a vacuum environment. Compared with the prior art, the handle in the present invention has the functions of both an air extraction one-way valve and a tank lid handle, with diverse functions, which is conducive to streamlining the structure of the tank lid and reducing production costs.

[0020] 2. A vertical blind hole is provided on the handle. When the inside of the tank is in a vacuum state, the user can relieve the pressure inside the tank by squeezing the handle part with the hand, allowing external air to enter the tank. After the air pressure inside and outside the tank is balanced, the lid can be opened by lifting the handle.

[0021] 3. The auxiliary lifting plate installed inside the lifting convex block can increase the stiffness of the lower end of the handle, preventing the handle from being pulled out of the air extraction hole when opening the tank lid. Description of the Drawings

[0022] Figure 1 is a cross-sectional view of the vacuum tank;

[0023] Figure 2 is Figure 1 a schematic diagram of Embodiment 1 of Part A in

[0024] Figure 3 a perspective view of the lid;

[0025] Figure 4 a perspective view of Embodiment 1 of the handle;

[0026] Figure 5 is a cross-sectional view when using a vacuum pump to evacuate the vacuum tank;

[0027] Figure 6 is Figure 1 a schematic diagram of Embodiment 2 of Part A in Detailed Embodiment

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will change accordingly. In addition, the descriptions involving "preferred", "sub-preferred", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "preferred" or "sub-preferred" may explicitly or implicitly include at least one such feature.

[0030] Referring to Figures 1 to 6 , an embodiment of the present invention provides a lid structure for a vacuum tank, which includes a lid body 1 and a handle 2. An air extraction hole 11 penetrating up and down is provided on the lid body 1. The handle 2 penetrates through the air extraction hole 11, and an air extraction channel 3 is left between the handle 2 and the inner side wall of the air extraction hole 11. A hand-held part 21 is provided at the upper part of the handle 2, a lifting lug 22 for lifting the lid body 1 is provided at the lower part of the handle 2, and a sealing soft film 23 capable of pressing against the upper surface of the lid body 1 to close the upper port of the air extraction channel 3 is provided on the handle 2. The air extraction channel 3 can be the gap between the handle 2 and the inner side wall of the air extraction hole 11, can also be a vertical groove provided on the handle 2, or can be a vertical groove provided on the inner side wall of the air extraction hole 11.

[0031] In a specific solution of the present invention, a concave position 14 is provided in the middle of the lid body 1, the air extraction hole 11 is provided at the bottom of the concave position 14, and both the hand-held part 21 and the sealing soft film 23 are received in the concave position 14. An annular installation groove 15 surrounding the concave position 14 is provided on the upper surface of the lid body 1, and a first sealing ring 6 is provided at the edge of the lid body 1.

[0032] For a vacuum tank with the above-described tank lid structure, the lid body 1 and the tank body 5 are sealed by a first sealing ring 6. When the air pressure inside the tank body 5 is balanced with the external air pressure, the user can hold the handle 2 and open the lid body 1. When using a vacuum pump 7 to evacuate the air, the vacuum pump 7 is installed in the above-mentioned annular installation groove 15, and a seal is formed between the vacuum pump 7 and the lid body 1 through a second sealing ring 71 at the bottom of the vacuum pump 7. Then, turn on the vacuum pump of the vacuum pump 7 to first evacuate the air between the vacuum pump 7 and the lid body 1. Then, a pressure difference is formed between the space inside the tank body 5 and the space inside the recess 14, causing the sealing soft film 23 to turn upward and separate from the upper surface of the lid body 1, and then the air inside the tank body 5 can be evacuated. When the degree of vacuum inside the tank body 5 meets the requirements, the vacuum pump stops, and then open the pressure relief valve on the vacuum pump 7 to make the space inside the recess 14 reach air pressure balance with the external space. During this process, a pressure difference is formed again between the space inside the tank body 5 and the space inside the recess 14. This pressure difference will cause the sealing soft film 23 to turn downward and press tightly on the upper surface of the lid body 1, closing the upper port of the air extraction channel 3, and thus the inside of the tank body 5 can maintain a vacuum environment.

[0033] In the above solution, the handle 2 on the lid body 1 has the functions of both an air extraction one-way valve and a tank lid handle 2, with diverse functions, which is beneficial to streamlining the structure of the tank lid and reducing production costs.

[0034] In a preferred embodiment of the present invention, the lifting convex block 22 is in the shape of a round cake and shields the lower port of the air extraction channel 3. A guide air channel 4 communicating with the air extraction channel 3 is provided between the lifting convex block 22 and the lower surface of the lid body 1. Preferably, the lower surface of the lid body 1 is provided with a plurality of support blocks 13 that can abut against the lifting convex block 22, and the space between different support blocks 13 forms the guide air channel 4. With such a design, it can ensure that there is sufficient contact area between the lifting convex block 22 and the lid body 1, and at the same time, it can ensure the smoothness of the air extraction channel 3.

[0035] In some preferred embodiments of the present invention, the lifting convex block 22 can also be designed in a shape that does not completely shield the lower port of the air extraction channel 3. For example, the air extraction hole 11 is designed as a round hole, the upper surface of the lifting convex block 22 is square, the side length of the square is less than the diameter of the air extraction hole 11, and the length of the diagonal of the square is greater than the diameter of the air extraction hole 11.

[0036] In a preferred embodiment of the present invention, the hand-held portion 21, the lifting convex block 22, and the sealing soft film 23 are of an integrated soft rubber structure and are formed by one-piece silicone injection molding.

[0037] In a further embodiment of the present invention, the handle 2 is provided with a vertical blind hole 20 so that when the two sides of the handle portion 21 are squeezed, the sealing soft plastic sheet 23 can be driven away from the upper surface of the cover body 1. With such a design, when the tank body 5 is in a vacuum state, the user can release the pressure in the tank body 5 by pinching the handle portion 21 to allow external air to enter the tank body 5. After the air pressure inside the tank body 5 is balanced with that outside, the handle 2 can be lifted to open the cover body.

[0038] In a further improvement of the above scheme, a hard auxiliary lifting plate 24 is detachably installed inside the lifting protrusion 22. The auxiliary lifting plate 24 can increase the rigidity of the lower end of the handle 2 to prevent the handle 2 from being pulled out of the air extraction hole 11 when the can lid is opened. Preferably, the air extraction hole 11 is a circular hole, the auxiliary lifting plate 24 is a circular plate, and the diameter of the auxiliary lifting plate 24 is greater than the diameter of the air extraction hole 11.

[0039] In a further improvement of the above scheme, the vertical blind hole 20 includes a first blind hole 201 with an opening facing downward, a slot 221 is provided on the inner side wall of the first blind hole 201, and the auxiliary lifting plate 24 is clamped in the slot 221. The auxiliary lifting plate 24 divides the first blind hole 201 into an upper hole section and a lower hole section, and a through hole connecting the upper hole section and the lower hole section is provided on the auxiliary lifting plate 24. With such a design, when the user pinches the handle 21 to release pressure, part of the air in the upper hole section can be squeezed out, so that the handle 2 is squeezed and deformed.

[0040] Specifically, the vertical blind hole 20 further includes a second blind hole 202 with an opening facing upward, and the handle 2 is provided with a partition 25 separating the first blind hole 201 and the second blind hole 202 .

[0041] In order to improve the sealing effect of the sealing soft film 23, the following two solutions can be adopted.

[0042] The first option is Figure 2 and Figure 4 As shown, the lower surface of the sealing soft film 23 is provided with a plurality of annular convex ribs 231 which abut against the upper surface of the cover body 1. The number of the annular convex ribs 231 is preferably 2-3, and all the annular convex ribs 231 are arranged around the axis of the handle 2.

[0043] The second option is Figure 6 As shown, the upper surface of the cover body 1 has an annular rib 12 which is arranged around the air extraction hole 11 and abuts against the lower surface of the sealing soft plastic film 23 .

[0044] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A lid structure for a vacuum tank, comprising a lid body (1) and a handle (2). An air extraction hole (11) is provided on the lid body (1). Characterized in that, The handle (2) passes through the air extraction hole (11), and an air extraction channel (3) is left between the handle (2) and the inner side wall of the air extraction hole (11). A hand-held part (21) is provided at the upper part of the handle (2), and a lifting lug (22) for lifting the lid body (1) is provided at the lower part of the handle (2). A sealing soft rubber sheet (23) capable of pressing against the upper surface of the lid body (1) to close the upper port of the air extraction channel (3) is provided on the handle (2); the lifting lug (22) shields the lower port of the air extraction channel (3), and an air guide channel (4) communicating with the air extraction channel (3) is provided between the lifting lug (22) and the lower surface of the lid body (1); A plurality of support blocks (13) capable of abutting against the lifting lug (22) are provided on the lower surface of the lid body (1), and the space between different support blocks (13) forms the air guide channel (4); the hand-held part (21), the lifting lug (22), and the sealing soft rubber sheet (23) are of an integral soft rubber structure. A vertical blind hole (20) is provided on the handle (2) so that when both sides of the hand-held part (21) are squeezed, the sealing soft rubber sheet (23) can be driven to separate from the upper surface of the lid body (1); A hard auxiliary lifting plate (24) is detachably installed inside the lifting lug (22); the vertical blind hole (20) includes a first blind hole (201) with an opening facing downwards. The auxiliary lifting plate (24) divides the first blind hole (201) into an upper hole section and a lower hole section, and a through hole (241) for communicating the upper hole section and the lower hole section is provided on the auxiliary lifting plate (24).

2. A lid structure for a vacuum tank according to claim 1, Characterized in that, The air extraction hole (11) is a round hole, the auxiliary lifting plate (24) is a round plate, and the diameter of the auxiliary lifting plate (24) is larger than the diameter of the air extraction hole (11).

3. A lid structure for a vacuum tank according to claim 1, Characterized in that, A clamping groove (221) is provided on the inner side wall of the first blind hole (201), and the auxiliary lifting plate (24) is clamped in the clamping groove (221).

4. A lid structure for a vacuum tank according to claim 1, Characterized in that, A plurality of annular ribs (231) abutting against the upper surface of the lid body (1) are provided on the lower surface of the sealing soft rubber sheet (23).

5. A lid structure for a vacuum tank according to claim 1, Characterized in that, An annular rib (12) surrounding the air extraction hole (11) and abutting against the lower surface of the sealing soft rubber sheet (23) is provided on the upper surface of the lid body (1).

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