An air extraction device

Abstract

The utility model discloses an air extractor, including the elastic plugging mechanism for communicating with the first air outlet of main body, the air extraction mechanism of elastic plugging mechanism intercommunication, elastic plugging mechanism includes the first sleeve of lower end and first air outlet intercommunication, the plugging piece and elastic piece of being located in the first sleeve, the air extraction mechanism includes the second sleeve of lower end and first sleeve upper end intercommunication, the second air outlet of being arranged in the second sleeve side portion, the lift of being located in the length direction of second sleeve of top rod, elastic piece is used for tightly up the plugging piece in the upper end opening place of first sleeve to make it be in the sealed position, and top rod is used for the plugging piece from the upper end opening place of first sleeve and down to open to make it be in the opening position. The utility model discloses air extractor, simple structure can avoid the vacuum destruction problem and the safety problem of the misoperation.

Description

Technical Field

[0001] This utility model relates to an air extraction device. Background Technology

[0002] In existing technologies, a manual valve connected to the evacuation port is typically installed on the main body requiring vacuuming. During vacuuming, the manual valve is first connected to a vacuum pump, then opened to perform the vacuuming operation. After vacuuming is complete, the manual valve is closed, and then the vacuum pump is removed. The disadvantage of this structure is that accidental opening of the manual valve during normal operation or vacuuming can not only disrupt the vacuum but also pose certain safety hazards. Utility Model Content

[0003] The purpose of this invention is to provide a vacuum pumping device with a simple structure that can avoid vacuum disruption and safety issues caused by misoperation.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A vacuuming device is used to cooperate with a body having a hollow cavity for vacuuming. The body is provided with a first vacuum port. The vacuuming device includes an elastic sealing mechanism for communicating with the first vacuum port and a vacuuming mechanism for communicating with the elastic sealing mechanism.

[0006] The elastic sealing mechanism includes a first sleeve whose lower end is connected to the first air extraction port, a sealing member disposed in the first sleeve, and an elastic member disposed in the first sleeve for pressing upward against the sealing member;

[0007] The air extraction mechanism includes a second sleeve whose lower end is connected to the upper end of the first sleeve, a second air extraction port opened on the side of the second sleeve, and a top rod that can be raised and lowered in the second sleeve along the length direction of the second sleeve.

[0008] The sealing element has a sealed position and an open position, and the sealing element is used to switch the on / off state of the first air extraction port and the second air extraction port by switching its position:

[0009] The elastic element is used to press the sealing element upward against the upper opening of the first sleeve so that it is in the sealed position, and the push rod is used to push the sealing element downward from the upper opening of the first sleeve so that it is in the open position.

[0010] Preferably, the inner diameter of the first sleeve is larger than the diameter of the sealing member, the inner diameter of the upper opening of the first sleeve is smaller than the diameter of the sealing member, and the inner diameter of the upper opening of the first sleeve is larger than the diameter of the downward pushing portion of the push rod.

[0011] Preferably, the first sleeve is provided with a limiting member for limiting the lower end of the elastic member.

[0012] More preferably, the limiting member is an annular portion that is circumferentially connected to the inner periphery of the first sleeve, and the inner diameter of the annular portion is smaller than the diameter of the elastic member.

[0013] Preferably, the elastic sealing mechanism further includes a first sealing element disposed between the first sleeve and the first air extraction port.

[0014] Preferably, the push rod includes a threaded section and a guide section connected sequentially from top to bottom, and the air extraction mechanism further includes a threaded sleeve coaxially connected to the second sleeve. The push rod is threadedly connected to the threaded sleeve through the threaded section, and the diameter of the guide section is smaller than the inner diameter of the second sleeve.

[0015] More preferably, the air extraction mechanism further includes a limiting sleeve disposed in the second sleeve and fitted on the guide section, wherein the inner diameter of the limiting sleeve is equal to or slightly larger than the outer diameter of the guide section.

[0016] More preferably, the air extraction mechanism further includes a second sealing element disposed between the second sleeve and the guide section, the second sealing element being located above the second air extraction port.

[0017] More preferably, the threaded sleeve is connected above the second sleeve, the threaded section extends upward from the threaded sleeve, and the push rod further includes a rotating handle connected to the top of the threaded section.

[0018] Preferably, the second sleeve includes a connecting portion located at its lower end, the inner diameter of the connecting portion being equal to or slightly larger than the outer diameter of the first sleeve, and a third sealing element is provided between the connecting portion and the first sleeve.

[0019] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: The air extraction device of this utility model is equipped with a first sleeve and a second sleeve that can be installed together. The first sleeve is installed on the first air extraction port of the main body. By driving the push rod to move up and down, and cooperating with the elastic element, the sealing element can freely switch between the sealed position and the open position, thereby switching the on / off state between the first air extraction port and the second air extraction port. This air extraction device has a simple structure, is easy to operate, and can avoid vacuum damage and safety problems caused by misoperation. Attached Figure Description

[0020] Appendix Figure 1 This is a front view structural diagram of the air extraction device according to a specific embodiment of the present utility model;

[0021] Appendix Figure 2 For the appendix Figure 1Schematic diagram of the cross-sectional structure along line AA;

[0022] Appendix Figure 3 For the appendix Figure 1 A schematic diagram of the flexible sealing mechanism installed on the main body;

[0023] Appendix Figure 4 For the appendix Figure 1 A schematic diagram of the central air extraction mechanism.

[0024] Among them: 1. Main body; 11. First air extraction port;

[0025] 2. Elastic sealing mechanism; 21. First sleeve; 22. Sealing component; 23. Elastic component; 24. Limiting component; 25. First sealing component;

[0026] 3. Air extraction mechanism; 31. Second sleeve; 311. Connecting part; 32. Second air extraction port; 33. Push rod; 331. Threaded section; 332. Guide section; 333. Rotating handle; 34. Threaded sleeve; 35. Limiting sleeve; 36. Second sealing element;

[0027] 4. Third sealing element. Detailed Implementation

[0028] The technical solution of this utility model will be further described below with reference to specific embodiments and accompanying drawings.

[0029] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0030] In the description of the embodiments of this utility model, it should be understood that the terms "length", "inner", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0033] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0035] See Figure 1-4 As shown, this embodiment provides a vacuuming device for use in conjunction with a main body 1 having a hollow cavity to perform vacuuming. The main body 1 has a first vacuum port 11 at its top. The vacuuming device includes an elastic sealing mechanism 2 for communicating with the first vacuum port 11 and a vacuuming mechanism 3 for communicating with the elastic sealing mechanism 2.

[0036] The elastic sealing mechanism 2 includes a first sleeve 21 whose lower end is connected to the first air extraction port 11, a sealing element 22 disposed in the first sleeve 21, and an elastic element 23 disposed in the first sleeve 21 for pressing the sealing element 22 upward.

[0037] In this embodiment, the inner diameter of the first sleeve 21 is larger than the diameter of the sealing member 22, and the inner diameter of the upper opening of the first sleeve 21 is smaller than the diameter of the sealing member 22. With this arrangement, when the sealing member 22 presses upward against the upper opening of the first sleeve 21 under the action of the elastic member 23, it forms a seal on the first air extraction port 11; when the sealing member 22 compresses the elastic member 23 downward under the action of external force, the first air extraction port 11 communicates with the outside through this opening.

[0038] The first sleeve 21 is provided with a limiting member 24 for limiting the lower end of the elastic member 23. In this embodiment, the limiting member 24 is an annular portion circumferentially connected to the inner periphery of the first sleeve 21, and the inner diameter of the annular portion is smaller than the diameter of the elastic member 23. By limiting the elastic member 23 through the annular portion, it can be compressed into the first sleeve 21 when subjected to the downward force of the sealing member 22.

[0039] To improve the sealing effect, the above-mentioned elastic sealing mechanism 2 also includes a first sealing element 25 disposed between the first sleeve 21 and the first air extraction port 11.

[0040] The suction mechanism 3 includes a second sleeve 31 whose lower end is connected to the upper end of the first sleeve 21, a second suction port 32 opened on the side of the second sleeve 31, and a push rod 33 that can be raised and lowered in the second sleeve 31 along its length. The inner diameter of the opening at the upper end of the first sleeve 21 is larger than the diameter of the downward-push-in portion of the push rod 33. With this arrangement, when the push rod 33 is pushed downward into the first sleeve 21, the first sleeve 21 and the second sleeve 31 are connected to each other.

[0041] The sealing member 22 has a sealed position and an open position, and the sealing member 22 is used to switch the on / off state between the first air extraction port 11 and the second air extraction port 32 by switching its position.

[0042] When the push rod 33 moves downward and pushes the sealing member 22 out of the upper opening of the first sleeve 21, the sealing member 22 is in the open position. At this time, the elastic member 23 is compressed, the first sleeve 21 and the second sleeve 31 are connected to each other, and the second air extraction port 32 is connected to the first air extraction port 11.

[0043] When the push rod 33 moves upward, the elastic element 23 presses the sealing element 22 against the upper opening of the first sleeve 21. At this time, the sealing element 22 is in the sealed position. The first sleeve 21 and the second sleeve 31 are separated from each other, and the second air extraction port 32 is separated from the first air extraction port 11.

[0044] See Figure 2As shown, the push rod 33 includes a threaded section 331 and a guide section 332 connected sequentially from top to bottom. The air extraction mechanism 3 also includes a threaded sleeve 34 coaxially connected to the second sleeve 31. The push rod 33 is threadedly connected to the threaded sleeve 34 through the threaded section 331. The diameter of the guide section 332 is smaller than the inner diameter of the second sleeve 31.

[0045] In this embodiment, the air extraction mechanism 3 further includes a limiting sleeve 35 disposed in the second sleeve 31 and fitted onto the guide section 332. The inner diameter of the limiting sleeve 35 is equal to or slightly larger than the outer diameter of the guide section 332. By setting the limiting sleeve 35, it is ensured that the push rod 33 moves linearly in the vertical direction, avoiding the problem of tilting and air leakage.

[0046] In this embodiment, the air extraction mechanism 3 further includes a second sealing element 36 disposed between the second sleeve 31 and the guide section 332, the second sealing element 36 being located above the second air extraction port 32. There are two second sealing elements 36, respectively disposed at the upper and lower ends of the limiting sleeve 35, to improve the sealing effect.

[0047] In this embodiment, the threaded sleeve 34 is connected above the second sleeve 31, the threaded section 331 extends upward from the threaded sleeve, and the push rod 33 also includes a rotating handle 333 connected to the top of the threaded section 331. By rotating the rotating handle 333, the push rod 33 can be driven to move up and down, thereby conveniently switching the on and off states of the first sleeve 21 and the second sleeve 31, making the operation simple.

[0048] See Figure 2 As shown, the second sleeve 31 includes a connecting part 311 located at its lower end. The inner diameter of the connecting part 311 is equal to or slightly larger than the outer diameter of the first sleeve 21. The second sleeve 31 is sleeved on the top end of the first sleeve 21 through the connecting part 311. A third sealing element 4 is provided between the connecting part 311 and the first sleeve 21.

[0049] The working process of this embodiment is described in detail below:

[0050] First, install the elastic sealing mechanism 2 and the air extraction mechanism 3 together, and then install the elastic sealing mechanism 2 on the first air extraction port 11 of the main body 1.

[0051] When it is necessary to evacuate the main body 1, rotate the handle 333 in the forward direction to move the top rod 33 downward until it pushes the sealing part 22 downward. At this time, the elastic part 23 is compressed, and the first air extraction port 11 and the second air extraction port 32 are connected. The vacuum pump connected to the second air extraction port 32 is used to evacuate the main body 1.

[0052] After the vacuuming of the main body 1 is completed, the handle 333 is rotated in the opposite direction to move the top rod 33 upward and reset it. Under the action of the elastic element 23, the sealing element 22 seals the upper opening of the first sleeve 21 upward.

[0053] Remove the air extraction mechanism 3.

[0054] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A vacuum pumping device for use in conjunction with a main body having a hollow cavity for vacuuming, wherein the main body is provided with a first vacuum port, characterized in that: The air extraction device includes an elastic sealing mechanism for communicating with the first air extraction port and an air extraction mechanism for communicating with the elastic sealing mechanism. The elastic sealing mechanism includes a first sleeve whose lower end is connected to the first air extraction port, a sealing member disposed in the first sleeve, and an elastic member disposed in the first sleeve for pressing upward against the sealing member; The air extraction mechanism includes a second sleeve whose lower end is connected to the upper end of the first sleeve, a second air extraction port opened on the side of the second sleeve, and a top rod that can be raised and lowered in the second sleeve along the length direction of the second sleeve. The sealing element has a sealed position and an open position, and the sealing element is used to switch the on / off state of the first air extraction port and the second air extraction port by switching its position: The elastic element is used to press the sealing element upward against the upper opening of the first sleeve so that it is in the sealed position, and the push rod is used to push the sealing element downward from the upper opening of the first sleeve so that it is in the open position.

2. The air extraction device according to claim 1, characterized in that: The inner diameter of the first sleeve is larger than the diameter of the sealing member, the inner diameter of the opening at the upper end of the first sleeve is smaller than the diameter of the sealing member, and the inner diameter of the opening at the upper end of the first sleeve is larger than the diameter of the downward pushing part of the push rod.

3. The air extraction device according to claim 1, characterized in that: The first sleeve is provided with a limiting member for limiting the lower end of the elastic element.

4. The air extraction device according to claim 3, characterized in that: The limiting member is an annular portion that is circumferentially connected to the inner periphery of the first sleeve, and the inner diameter of the annular portion is smaller than the diameter of the elastic member.

5. The air extraction device according to claim 1, characterized in that: The elastic sealing mechanism further includes a first sealing element disposed between the first sleeve and the first air extraction port.

6. The air extraction device according to claim 1, characterized in that: The push rod includes a threaded section and a guide section connected sequentially from top to bottom. The air extraction mechanism also includes a threaded sleeve coaxially connected to the second sleeve. The push rod is threadedly connected to the threaded sleeve through the threaded section. The diameter of the guide section is smaller than the inner diameter of the second sleeve.

7. The air extraction device according to claim 6, characterized in that: The air extraction mechanism further includes a limiting sleeve disposed in the second sleeve and fitted on the guide section, wherein the inner diameter of the limiting sleeve is equal to or slightly larger than the outer diameter of the guide section.

8. The air extraction device according to claim 6, characterized in that: The air extraction mechanism further includes a second sealing element disposed between the second sleeve and the guide section, the second sealing element being located above the second air extraction port.

9. The air extraction device according to claim 6, characterized in that: The threaded sleeve is connected above the second sleeve, the threaded section extends upward from the threaded sleeve, and the push rod also includes a rotating handle connected to the top of the threaded section.

10. The air extraction device according to claim 1, characterized in that: The second sleeve includes a connecting portion located at its lower end, the inner diameter of the connecting portion being equal to or slightly larger than the outer diameter of the first sleeve, and a third sealing element being provided between the connecting portion and the first sleeve.

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