Vacuum tank cover structure

Abstract

The utility model discloses a vacuum tank cover structure which comprises a tank cover and a vacuumizing assembly, an exhaust containing cavity with an opening in the upper end is formed in the tank cover, an exhaust channel used for exhausting is arranged on the bottom face of the exhaust containing cavity, a first one-way valve is installed on the exhaust channel, and the vacuumizing assembly is arranged in the exhaust containing cavity in an up-down moving mode. An exhaust flow channel is integrated in the vacuumizing assembly, the input end of the exhaust flow channel is communicated with the exhaust containing cavity, a second one-way valve is arranged in the exhaust flow channel, an exhaust port communicated with the exhaust flow channel is formed in the vacuumizing assembly, and a sealing ring tightly attached to the inner side wall of the exhaust containing cavity is fixedly arranged on the vacuumizing assembly. Through the arrangement of the double one-way valves, the problem that in the prior art, exhaust is unstable due to the fact that exhaust is conducted through a movable sealing ring can be solved.

Description

Technical Field

[0001] The utility model relates to a vacuum tank cover structure. Background Art

[0002] Prior art, such as Chinese invention patent document, publication number CN107031976A, discloses a vacuum bottle cap for a storage tank with a simple structure, which can instantly evacuate or relieve pressure on a wide-mouth storage tank.

[0003] In this prior art, it is disclosed that when the vacuum pressing block is pressed, the second sealing ring is located in the positioning groove and close to the upper edge of the positioning groove, and at this time, the air in the vacuum chamber is discharged from the exhaust port;

[0004] When the vacuum pressing block is released, the first return spring pushes the vacuum pressing block to move upward, the second sealing ring is located in the positioning groove and close to the lower edge of the positioning groove, the exhaust duct is closed, and the one-way valve is opened at this time, and the air in the storage tank is sucked into the vacuum chamber.

[0005] Based on the above, in the prior art, in the exhaust state, the second sealing ring is located in the positioning groove and close to the upper edge of the positioning groove. In the vacuum state, the second sealing ring is located in the positioning groove and close to the lower edge of the positioning groove. The switching between vacuum and exhaust is achieved by moving the second sealing ring. Although this structure can omit parts as much as possible, this structure requires very precise assembly accuracy and production processing accuracy of the second sealing ring and the size of the outer handle and inner handle that constitute the vacuum pressing block. When the second sealing ring and the vacuum pressing block have matching problems due to the assembly process or the production process, the second sealing ring will not move smoothly up and down and cannot move, resulting in an inability to switch between the exhaust and vacuum states. The stability and reliability are poor and need to be further improved. Utility Model Content

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a vacuum can cover structure with a second one-way valve to improve product stability and reliability.

[0007] A vacuum tank cover structure designed for this purpose comprises a tank cover and a vacuum pumping assembly, wherein the tank cover is provided with an exhaust cavity with an upper end opening, an exhaust channel for exhausting is provided on the bottom surface of the exhaust cavity, a first non-return valve is installed in the exhaust channel, the vacuum pumping assembly is arranged in the exhaust cavity for upward and downward movement, an exhaust flow channel is integrated in the vacuum pumping assembly, an input end of the exhaust flow channel is communicated with the exhaust cavity, a second non-return valve is provided in the exhaust flow channel, an exhaust port communicated with the exhaust flow channel is provided on the vacuum pumping assembly, and a sealing ring is fixedly provided on the vacuum pumping assembly and is in close contact with the inner side wall of the exhaust cavity.

[0008] Preferably, the vacuum assembly comprises an upper cover and a lower cover assembled with each other, an exhaust cavity is formed between the upper cover and the lower cover, and an outlet flow channel is provided on the lower cover; one end of the outlet flow channel is connected to the exhaust cavity, and the other end is connected to the exhaust volume chamber, and the exhaust port is connected to the exhaust cavity.

[0009] Preferably, the second one-way valve is arranged in the outlet flow channel.

[0010] Preferably, a cavity shell is connected below the tank cover, the exhaust cavity is arranged in the cavity shell, the exhaust channel is arranged on the cavity shell, an opening is arranged on the tank cover above the cavity shell, the vacuum pumping component is movably arranged in the exhaust cavity through the opening, a limiting flange is arranged on the vacuum pumping component, and the upper end surface of the limiting flange can be fitted with the lower end surface of the tank cover to form a limiting fit.

[0011] Preferably, an annular mounting groove is provided on the outer wall surface of the vacuum pumping component, and the sealing ring is arranged in the annular mounting groove.

[0012] Preferably, the sealing ring consists of a fixed portion and a sealing extension portion, the fixed portion is fixedly arranged on the vacuum pumping assembly, and the sealing extension portion extends outward to closely fit with the inner wall of the exhaust chamber.

[0013] Preferably, an elastic element for applying an upward force to the vacuum pumping component is provided in the exhaust chamber.

[0014] Preferably, a pressure relief port is provided on the tank cover, and a pressure relief element is provided in the pressure relief port.

[0015] Compared with the prior art, the utility model has an exhaust channel integrated in the vacuum pumping component, the input end of the exhaust channel is interconnected with the exhaust chamber, a second one-way valve is arranged in the exhaust channel, the vacuum pumping component is provided with an exhaust port interconnected with the exhaust channel, and the vacuum pumping component is fixedly provided with a sealing ring that is tightly fitted with the inner side wall of the exhaust chamber. The exhaust channel arranged in the utility model cooperates with the second one-way valve, and the exhaust is controlled by the second one-way valve. When the vacuum pumping component is pressed down, the second one-way valve is opened, and the cavity in the exhaust chamber is output from the exhaust port to the outside through the second one-way valve and the exhaust channel. When the vacuum pumping component moves upward to reset, the air under the tank cover enters the exhaust chamber through the first one-way valve. The double one-way valve arrangement of the utility model can solve the instability problem of the prior art that relies on the movable sealing ring for exhaust. The fixed sealing ring of the utility model only needs its sealing function, and the fixed sealing ring can reduce the requirements for assembly and processing accuracy, better ensure the sealing, thereby improving the stability and reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 This is one of the cross-sectional structural schematic diagrams of the utility model;

[0018] Figure 3 This is the second schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the exploded cross-sectional structure of the utility model;

[0020] Figure 5 This is the third schematic diagram of the cross-sectional structure of the present utility model. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] See also Figure 1-Figure 5A vacuum tank cover structure comprises a tank cover 10 and a vacuum pumping assembly 20, wherein the tank cover 10 is provided with an exhaust cavity 130 with an upper end opening, an exhaust channel 140 for exhausting is provided on the bottom surface of the exhaust cavity 130, a first non-return valve 50 is installed on the exhaust channel 140, the vacuum pumping assembly 20 is arranged in the exhaust cavity 130 for vertical movement, an exhaust channel 200 is integrated in the vacuum pumping assembly 20, an input end of the exhaust channel 200 is communicated with the exhaust cavity 130, a second non-return valve 230 is provided in the exhaust channel 200, an exhaust port 240 communicated with the exhaust channel 200 is provided on the vacuum pumping assembly 20, and a sealing ring 40 is fixedly arranged on the vacuum pumping assembly 20 and tightly fitted with the inner wall of the exhaust cavity 130.

[0023] The function of the first one-way valve 50 is to prevent air from flowing from the outside into the exhaust chamber 130 through the exhaust passage 140 .

[0024] The function of the second one-way valve 230 is to allow air to flow from the exhaust chamber 130 to the exhaust port 240 through the exhaust passage 200 .

[0025] The exhaust channel provided in the utility model cooperates with the second one-way valve, and the exhaust is controlled by the second one-way valve. When the vacuum pumping component is pressed down, the second one-way valve opens, and the cavity in the exhaust chamber is output from the exhaust port to the outside through the second one-way valve and the exhaust channel. When the vacuum pumping component moves upward and resets, a negative pressure is formed in the exhaust chamber, and the air under the tank cover enters the exhaust chamber through the first one-way valve. The double one-way valve setting of the utility model can solve the instability problem of the prior art that relies on a movable sealing ring for exhaust. The fixed sealing ring of the utility model only needs its sealing function. The fixed sealing ring can reduce the requirements for assembly and processing accuracy, better ensure the sealing, and thus improve the stability and reliability of the product.

[0026] See also Figure 2 The vacuum assembly 20 includes an upper cover 210 and a lower cover 220 assembled with each other, an exhaust cavity 202 is formed between the upper cover 210 and the lower cover 220, and an outlet flow channel 201 is provided on the lower cover 220; one end of the outlet flow channel 201 is connected to the exhaust cavity 202, and the other end is connected to the exhaust volume chamber 130, and the exhaust port 240 is connected to the exhaust cavity 202.

[0027] See also Figure 2 , the second one-way valve 230 is arranged in the outlet flow channel 201.

[0028] Furthermore, the upper cover 210 and the lower cover 220 are fixedly connected by means of snap fastening or ultrasonic welding.

[0029] See also Figure 2 A cavity shell 120 is connected to the lower part of the tank cover 10, the exhaust cavity 130 is arranged in the cavity shell 120, the exhaust channel 140 is arranged on the cavity shell 120, an opening 100 is arranged on the tank cover 10 above the cavity shell 120, the vacuum assembly 20 is movably arranged in the exhaust cavity 130 through the opening 100, and a limiting flange 250 is arranged on the vacuum assembly 20, and the upper end surface of the limiting flange 250 can be fitted with the lower end surface of the tank cover 10 to form a limiting fit.

[0030] See also Figure 3 The outer wall surface of the vacuum assembly 20 is provided with an annular mounting groove 260, and the sealing ring 40 is arranged in the annular mounting groove 260. During assembly, the sealing ring 40 is placed on the upper end surface of the lower cover 220, and then the upper cover 210 and the lower cover 220 are assembled. Thus, the sealing ring 40 can be quickly fixed.

[0031] See also Figure 3 The sealing ring 40 is composed of a fixed portion 410 and a sealing extension portion 420 . The fixed portion 410 is fixedly disposed on the vacuum pumping assembly 20 , and the sealing extension portion 420 extends outward to closely fit with the inner wall of the exhaust chamber 130 .

[0032] The fixing portion 410 has a fixing connection function, and the sealing extension portion 420 has a sealing function for fitting with the exhaust cavity 130 .

[0033] See also Figure 5 The exhaust chamber 130 is provided with an elastic element 60 for applying an upward force to the vacuum assembly 20 .

[0034] See also Figure 2 The can cover 10 is provided with a pressure relief port 110, and a pressure relief element 30 is provided in the pressure relief port 110. The pressure relief element 30 is used to open the pressure relief port 110 to contact the vacuum state, so as to facilitate the removal of the can cover 10. The pressure relief element 30 can adopt a structure consistent with the prior art, and will not be described in detail here.

[0035] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0037] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and the description are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A vacuum can cover structure, comprising a can cover (10) and a vacuum pumping assembly (20), wherein the can cover (10) is provided with an exhaust cavity (130) with an upper end opening, an exhaust channel (140) for exhausting is provided on the bottom surface of the exhaust cavity (130), a first one-way valve (50) is installed in the exhaust channel (140), and the vacuum pumping assembly (20) is arranged in the exhaust cavity (130) to move up and down, characterized in that: The vacuum pumping component (20) is integrated with an exhaust channel (200), the input end of the exhaust channel (200) is interconnected with the exhaust chamber (130), a second one-way valve (230) is arranged in the exhaust channel (200), the vacuum pumping component (20) is provided with an exhaust port (240) which is interconnected with the exhaust channel (200), and the vacuum pumping component (20) is fixed with a sealing ring (40) which is tightly fitted with the inner wall of the exhaust chamber (130).

2. A vacuum tank cover structure according to claim 1, characterized in that: The vacuum assembly (20) comprises an upper cover (210) and a lower cover (220) which are assembled with each other, an exhaust cavity (202) is formed between the upper cover (210) and the lower cover (220), and an outlet flow channel (201) is provided on the lower cover (220); one end of the outlet flow channel (201) is connected to the exhaust cavity (202), and the other end is connected to the exhaust volume chamber (130), and the exhaust port (240) is connected to the exhaust cavity (202).

3. A vacuum tank cover structure according to claim 2, characterized in that: The second one-way valve (230) is arranged in the outlet flow channel (201).

4. The vacuum tank cover structure according to claim 1, characterized in that: A cavity shell (120) is connected to the lower side of the tank cover (10); the exhaust cavity (130) is arranged in the cavity shell (120); the exhaust passage (140) is arranged on the cavity shell (120); an opening (100) is arranged on the tank cover (10) above the cavity shell (120); the vacuum pumping component (20) is movably arranged in the exhaust cavity (130) through the opening (100); a limiting flange (250) is arranged on the vacuum pumping component (20); and the upper end surface of the limiting flange (250) can be fitted with the lower end surface of the tank cover (10) to form a limiting fit.

5. The vacuum tank cover structure according to claim 1, characterized in that: An annular mounting groove (260) is provided on the outer wall surface of the vacuum pumping component (20), and the sealing ring (40) is arranged in the annular mounting groove (260).

6. A vacuum can cover structure according to claim 1 or 5, characterized in that: The sealing ring (40) is composed of a fixed portion (410) and a sealing extension portion (420), wherein the fixed portion (410) is fixedly disposed on the vacuum pumping assembly (20), and the sealing extension portion (420) extends outward to closely fit the inner wall of the exhaust chamber (130).

7. The vacuum tank cover structure according to claim 1, characterized in that: An elastic element (60) for applying an upward force to the vacuum pumping component (20) is arranged in the exhaust chamber (130).

8. The vacuum tank cover structure according to claim 1, characterized in that: The tank cover (10) is provided with a pressure relief port (110), and a pressure relief element (30) is provided in the pressure relief port (110).

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