High-vacuum storage tank cover

Abstract

The utility model belongs to the technical field of vacuum storage tanks, and particularly relates to a high-vacuum storage tank cover which comprises a cover body, an air exhaust assembly and a pressure relief assembly are arranged on the cover body, the air exhaust assembly comprises an air sealing plug, a pressing seat and a V-shaped sealing ring, an installation groove used for containing the pressing seat is formed in the cover body, and the pressing seat is arranged in the installation groove in a vertically movable mode. The V-shaped sealing ring is installed on the periphery of the pressing base and makes contact with the inner wall of the installation groove, and a V opening of the V-shaped sealing ring faces upwards. The air exhaust hole is located at the bottom of the mounting groove, the air sealing plug is arranged in the air exhaust hole and can block the air exhaust hole, and the matching face of the air sealing plug and the air exhaust hole is an inverted conical face. In the downward pressing and rising process of the pressing seat, the edge of the V-shaped sealing ring generates different deformation tendencies through friction between the edge of the V-shaped sealing ring and the inner wall of the mounting groove, the design that the air sealing plug is matched with the inverted conical surface of the air pumping hole is matched, air in the tank can be repeatedly pumped out, and the higher vacuum degree in the storage tank is achieved and kept.

Description

Technical Field

[0001] The utility model relates to a high vacuum storage tank cover, belonging to the technical field of vacuum storage tanks. Background Art

[0002] Manually operated vacuum storage jars exist in the prior art, primarily used for preserving food and protecting items from moisture. These jars primarily consist of a body and a lid, which, when fastened together, form a sealed space. The lid is equipped with a manual pressure-release mechanism. After placing items in the jar and tightening the lid, the user manually presses the pressure point on the lid several times (similar to the reverse principle of pumping air). This gradually removes the air from the jar, achieving a near-vacuum seal.

[0003] The utility model patent with publication number CN213893628U discloses a sealing ring, a tank cover and a storage tank. However, due to the structural limitation of the tank cover, a high vacuum degree cannot be achieved and maintained for a long time in the storage tank.

[0004] 1. Inability to achieve a high vacuum level within the storage tank: When the handle 31 is pressed and rebounds, the sealing ring 314 blocks the gap between the inner handle 312 and the receiving groove 22, preventing outside air from entering the vacuum chamber. However, since the sealing ring 314 has a circular cross-section, after vacuuming to a certain degree, further vacuuming will fail to meet the required pressure, resulting in leakage. In other words, the greater the negative pressure, the worse the sealing performance, and therefore, a high vacuum level cannot be achieved.

[0005] 2. The storage tank cannot maintain a high vacuum for a long time: the sealing cap 33 is small in size and has a small contact surface with the exhaust port, resulting in poor sealing, making it impossible to maintain a high vacuum for a long time. In addition, the tank cover is snapped onto the tank body, and the vacuum generally fails in about two or three days, resulting in poor use effect. Utility Model Content

[0006] In view of the above deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a high vacuum storage tank cover with good use effect to solve the above problems.

[0007] The high-vacuum storage tank cover disclosed by the utility model, including cover body, the cover body is equipped with the air extraction hole and the pressure relief hole, the position of the air extraction hole and the pressure relief hole is correspondingly provided with the air extraction component and the pressure relief component, the air extraction component includes the air seal plug, the pressing seat and the V-shaped sealing ring, the cover body is equipped with the installation groove for arranging the pressing seat, the pressing seat can be movably arranged in the installation groove, the pressing seat is provided with the reset member which can make it return; the V-shaped sealing ring is installed on the outer periphery of the pressing seat and is in contact with the inner wall of the installation groove, so that a closed area is formed between the pressing seat and the installation groove, and the V-shaped sealing ring has a V-shaped opening facing upward; the air extraction hole is located at the bottom of the installation groove, and the air seal plug is arranged in the air extraction hole to block the air extraction hole; the matching surface of the air seal plug and the air extraction hole is an inverted conical surface, and the slope of the generatrix of the conical surface is greater than 1.

[0008] The vacuum extraction principle is that the pressing seat is pressed down, the volume of the installation groove is reduced, air is compressed, the air seal plug is pressed against the air extraction hole under the action of air pressure, and air cannot pass through the air extraction hole. During the pressing-down process of the pressing seat, the edge of the V-shaped sealing ring rubs against the inner wall of the installation groove, the edge of the V-shaped sealing ring has a tendency to shrink inward, the sealing performance is reduced, air can leak out from between the V-shaped sealing ring and the inner wall of the installation groove, and the air in the installation groove is reduced. During the return of the pressing seat, the edge of the V-shaped sealing ring rubs against the inner wall of the installation groove, the edge of the V-shaped sealing ring has a tendency to expand outward, the sealing performance is greatly improved, air cannot pass through between the V-shaped sealing ring and the inner wall of the installation groove, the volume of the installation groove is increased at this time, the air pressure is reduced, the air seal plug cannot press the air extraction hole again, and the air in the tank enters the installation groove from the air extraction hole. After several times, the tank is extracted into negative pressure, and a high vacuum degree is achieved. Under the action of the high vacuum degree in the tank, the air seal plug always presses the air extraction hole, so that air cannot enter the tank. The matching surface of the air seal plug and the air extraction hole is an inverted conical surface, the slope of the generatrix of the conical surface is greater than 1, that is, the air seal plug is a conical long cylinder, the higher the vacuum degree, the better the sealing performance, and the high vacuum degree in the tank can be maintained for a long time.

[0009] The pressure relief component includes a pressure relief plug, the pressure relief plug is arranged in the pressure relief hole to block the pressure relief hole, the matching surface of the pressure relief plug and the pressure relief hole is an inverted conical surface, and the slope of the generatrix of the conical surface is greater than 1. The pressure relief plug can be lifted to open the pressure relief hole, so that external air enters the tank.

[0010] Preferably, the reset member is a reset spring, and the reset spring is longitudinally arranged between the pressing seat and the bottom surface of the installation groove.

[0011] The air extraction component further includes an air seal spring, the air seal spring is located in the air extraction hole, and the air seal plug can be further pressed against the air extraction hole.

[0012] The pressure relief component further includes a pressure relief sealing spring, the pressure relief sealing spring is located in the pressure relief hole, and the pressure relief plug can be further pressed against the pressure relief hole.

[0013] Preferably, the cover body is provided with an internal thread, and the cover body is connected to the tank body through the thread to enhance the sealing performance of the connection.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. Achieve high vacuum: By installing a V-shaped sealing ring, the friction between the edge of the V-shaped sealing ring and the inner wall of the mounting groove during the downward and upward movement of the pressing seat causes the edge of the sealing ring to produce different deformation trends. When pressing down, the edge contracts, allowing gas to be discharged; when it rises, the edge expands, greatly improving the sealing performance. The greater the negative pressure, the better the sealing, effectively preventing gas from entering the mounting groove. Combined with the design of the inverted conical surface of the air seal plug and the exhaust hole, the gas in the tank can be repeatedly extracted, achieving a higher vacuum level in the storage tank. This solves the problem of achieving high vacuum levels in the existing technology due to the structural limitations of the sealing ring.

[0016] 2. Maintain high vacuum for a long time: The mating surface between the air seal plug and the air extraction hole adopts an inverted conical surface, and the slope of the generatrix of the conical surface is greater than 1, forming a conical long cylindrical structure. Under the action of high vacuum in the tank, the air seal plug always presses the air extraction hole tightly, and the higher the vacuum, the better the sealing, which effectively prevents air from entering the tank. At the same time, the pressure relief plug and the pressure relief hole also adopt a similar design to enhance the overall sealing performance. In addition, the cover body is connected to the tank body through an internal thread and a sealing ring is provided to further enhance the connection sealing. Compared with the clamping method in the prior art, it can maintain a high vacuum in the tank for a long time, solving the problem that the prior art cannot maintain a high vacuum for a long time, and greatly improving the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic cross-sectional structural diagram of the present utility model;

[0018] Figure 2 It is a three-dimensional diagram of the present invention from a top-down perspective;

[0019] Figure 3 It is a three-dimensional diagram of the present invention when viewed from above;

[0020] Figure 4 It is a schematic diagram of the cross-sectional structure of a V-shaped sealing ring.

[0021] In the figure: 1. Outer ring; 2. Cover plate; 3. Limit plate; 4. Air seal plug; 5. Press seat; 6. Return spring; 7. Pressure relief seal spring; 8. Pressure relief plug; 9. Pressure relief hole; 10. Mounting groove; 11. Exhaust hole; 12. Air seal spring; 13. V-shaped sealing ring; 14. Sealing ring. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to specific embodiments.

[0023] The description of the utility model is only the embodiment of structural and functional description, and the scope of the utility model is not limited by the embodiment described in the text.

[0024] As Figures 1 to 4 The utility model discloses a high vacuum storage tank cover, including cover body, the cover body includes outer ring 1 and cover plate 2, be equipped with internal thread on outer ring 1, and the cover body is connected with the tank body through thread, and the connecting place sets up sealing ring 14.

[0025] Cover plate 2 is equipped with suction hole 11 and pressure relief hole 9, and suction hole 11 and pressure relief hole 9 are correspondingly provided with suction assembly and pressure relief assembly, and suction assembly includes air seal plug 4, pressing seat 5 and V type sealing ring 13, cover plate 2 is equipped with installation groove 10 for placing pressing seat 5, and pressing seat 5 can be set up in installation groove 10 and move up and down, and pressing seat 5 is provided with reset spring 6 that can make it rise, and reset spring 6 is longitudinally placed between pressing seat 5 and the bottom surface of installation groove 10.

[0026] V type sealing ring 13 is installed in the outer periphery of pressing seat 5 and contacts with the inner wall of installation groove 10, so that a closed area is formed between pressing seat 5 and installation groove 10, and the V mouth of V type sealing ring 13 faces upwards.

[0027] Suction hole 11 is located at the bottom of installation groove 10, and air seal plug 4 is arranged in suction hole 11 to block suction hole 11, the matching surface of air seal plug 4 and suction hole 11 is an inverted conical surface, and the slope of the generatrix of the conical surface is greater than 1. The suction assembly further comprises an air seal spring 12, which is located in the suction hole 11 and can press the suction hole 11 tightly.

[0028] The pressure relief assembly comprises a pressure relief plug 8, which is arranged in the pressure relief hole 9 to block the pressure relief hole 9, and the matching surface of the pressure relief plug 8 and the pressure relief hole 9 is an inverted conical surface, and the slope of the generatrix of the conical surface is greater than 1. The pressure relief assembly further comprises a pressure relief sealing spring 7, which is located in the pressure relief hole 9 and can press the pressure relief hole 9 tightly.

[0029] The working principle of the present invention is as follows: when the pressing seat 5 is pressed, the volume inside the mounting groove 10 becomes smaller and the air is compressed. At this time, the air sealing plug 4 presses the exhaust hole 11 under the action of air pressure, and the air cannot pass through the exhaust hole 11. During the pressing process of the pressing seat 5, the edge of the V-shaped sealing ring 13 rubs against the inner wall of the mounting groove 10, and the edge of the V-shaped sealing ring 13 produces an inward contraction trend, which reduces the sealing performance. The gas can leak out from between the V-shaped sealing ring 13 and the inner wall of the mounting groove 10, and then be discharged outward through the gap between the limit plate 3 and the pressing seat 5, and the gas inside the mounting groove 10 is reduced. When the pressing seat 5 rises, the edge of the V-shaped sealing ring 13 rubs against the inner wall of the mounting groove 10, and the edge of the V-shaped sealing ring 13 produces an outward expansion trend, which greatly improves the sealing performance, and the gas cannot pass through between the V-shaped sealing ring 13 and the inner wall of the mounting groove 10. At this time, the volume inside the mounting groove 10 increases, the air pressure decreases, and the air sealing plug 4 can no longer press the exhaust hole 11. The gas inside the tank enters the mounting groove 10 from the exhaust hole 11. After repeated cycles, the tank is evacuated to a negative pressure, achieving a high vacuum. Under the high vacuum, the air seal plug 4 maintains constant pressure against the evacuation hole 11, preventing air from entering the tank. Furthermore, the mating surface between the air seal plug 4 and the evacuation hole 11 is an inverted conical surface, with a generatrical slope greater than 1. This means the air seal plug 4 is tapered and cylindrical. The higher the vacuum, the better the sealing performance, maintaining a high vacuum within the tank for extended periods.

[0030] Of course, the above content is only a preferred embodiment of the present invention and should not be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples. Equivalent changes and improvements made by ordinary technicians in this technical field within the essential scope of the present invention should all fall within the scope of the patent of the present invention.

Claims

1. A high vacuum storage tank cover, comprising a cover body, wherein the cover body is provided with an air extraction hole (11) and a pressure relief hole (9), wherein the positions of the air extraction hole (11) and the pressure relief hole (9) are respectively provided with an air extraction component and a pressure relief component, wherein the cover body is provided with an air extraction component and a pressure relief component, wherein the air extraction hole (11) and the pressure relief hole (9) are respectively provided with an air extraction component and a pressure relief component, The vacuum assembly comprises an air sealing plug (4), a pressing seat (5) and a V-shaped sealing ring (13); a mounting groove (10) for accommodating the pressing seat (5) is provided on the cover body; the pressing seat (5) is movably arranged in the mounting groove (10) up and down, and the pressing seat (5) is provided with a reset member capable of returning the pressing seat to its original position; the V-shaped sealing ring (13) is installed on the outer periphery of the pressing seat (5) and contacts the inner wall of the mounting groove (10), so that a closed area is formed between the pressing seat (5) and the mounting groove (10), and the V-mouth of the V-shaped sealing ring (13) faces upward; The air extraction hole (11) is located at the bottom of the mounting groove (10), and the air sealing plug (4) is arranged in the air extraction hole (11) to seal the air extraction hole (11). The mating surface between the air sealing plug (4) and the air extraction hole (11) is an inverted conical surface, and the slope of the generatrix of the conical surface is greater than 1.

2. The high vacuum storage tank cover according to claim 1, characterized in that: The pressure relief assembly includes a pressure relief plug (8), which is arranged in the pressure relief hole (9) and can block the pressure relief hole (9). The mating surface between the pressure relief plug (8) and the pressure relief hole (9) is an inverted conical surface, and the slope of the generatrix of the conical surface is greater than 1.

3. The high vacuum storage tank cover according to claim 1, characterized in that: The reset member is a reset spring (6), and the reset spring (6) is longitudinally arranged between the pressing seat (5) and the bottom surface of the installation groove (10).

4. The high vacuum storage tank cover according to claim 1, characterized in that: The air extraction component further comprises an air sealing spring (12), which is located in the air extraction hole (11) and can enable the air sealing plug (4) to press the air extraction hole (11).

5. The high vacuum storage tank cover according to claim 1, characterized in that: The pressure relief assembly further comprises a pressure relief sealing spring (7), which is located in the pressure relief hole (9) and can enable the pressure relief plug (8) to press the pressure relief hole (9).

6. The high vacuum storage tank cover according to claim 1, characterized in that: The cover body is provided with an internal thread, and the cover body is connected and matched with the tank body through the thread.

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