Patent ID: 12187499

DETAILED DESCRIPTION OF THE INVENTION

FIG.1toFIG.7disclose a preferred embodiment of the self-adaptive air bag blocking device of the invention, which comprises an air bag10, a first gas conveying pipe20, a second gas conveying pipe30and a press plate40. The air bag10is made of an elastic material, and the inside of the air bag10is formed with an air chamber11. The air bag10has a first end12and a second end13. The first end12and the second end13are opposite each other along the axial direction of the air bag10. The peripheral side of the air bag10is formed with a ring-shaped abutting surface14. The abutting surface14is located between the first end12and the second end13, and the abutting surface14encloses the air chamber11. The outer diameter of the abutting surface14reduces gradually along the direction from the first end12to the second end13, so that the abutting surface14abuts against the mouth92of a container90. The abutting surface14is a conical surface. Optionally, the abutting surface14can be a spherical cambered surface or in other shapes.

The first gas conveying pipe20is configured on the air bag10. The first gas conveying pipe20is communicated with the air chamber11and the outside of the air bag10, so that air is imported into the air chamber11to inflate the air bag10. The abutting surface14is elastically deformed and abuts against the inner wall94of the container90to form air-tight connection. The first gas conveying pipe20is sleeved on the press plate40, and the press plate40is pressed against the first end12, so as to form a support to the first end12, and to enhance the air-tightness when the inflated air bag10blocks the mouth92.

The second gas conveying pipe30is configured on the air bag10. The abutting surface14encloses the second gas conveying pipe30. The second gas conveying pipe30goes through the first end12and the second end13and is extended out of the air bag10, so that air can go through the second gas conveying pipe30into the container90, to discharge the working liquid (not shown in the figure).

Referring toFIG.6, the air bag10abuts against the container90, the abutting surface14abuts against the mouth92, and the portion of the abutting surface14close to the second end13enters the container90, and is opposite to the inner wall94in the lateral direction. Referring toFIG.7, air can be imported into the air chamber11through the first gas conveying pipe20. The air will inflate the air bag10and cause deformation. Now, the abutting surface14is deformed and abuts tightly against the inner wall94. The press plate40forms a support to the first end12, to prevent the air going into the air chamber11to press the first end12to deform toward the upper side of the figure. The air entering the air chamber11can effectively cause the abutting surface14to deform and abut tightly against the inner wall94, so as to enhance the air-tightness when the air bag10blocks the mouth92. After the air bag10blocks the mouth92, air can be imported into the container90through the second gas conveying pipe30, so that the air can press the working liquid and force the working liquid to be discharged to the outside.

Based on the structures of the air chamber11and the first gas conveying pipe20, and the outer diameter of the abutting surface14reducing gradually from the first end12to the second end13, the air bag10can be used to block mouths92of different sizes, and thus can be applied to a plurality of containers90of different specifications. When the air chamber11is inflated, the abutting surface14will be deformed and be tightly pressed against the inner wall94. The surface contact between the abutting surface14and the inner wall94can form effective blocking with high blocking reliability. When it is needed to remove the air bag10from the mouth92and release the blocking, the operator just need to discharge the air inside the air chamber11. The elasticity of the material of the air bag10will recover the abutting surface14to its original state, and the air bag10can be easily removed from the container90. The operations of blocking and unblocking are very easy. Moreover, as the friction between the air bag10and the container90is minimal, the air bag10will not be worn out easily, nor will contraction occur. Therefore, the air bag10will have a longer service life.

As long as the air bag10is partly extended into the container90, when air is imported into the air chamber11to inflate the air chamber11, the abutting surface14will be tightly pressed against the inner wall94to form an effective blocking. Therefore, the air bag10can be applied to containers90with a narrow inner space, and it is suitable for a large range of sizes.

The preferred embodiment further comprises a fastener50. The fastener50abuts against the side of the press plate40away from the first end12. When the press plate40forms a support to the first end12, the fastener50abuts against the press plate40, further enhancing the effectiveness of the support by the press plate40to the first end12.

The first gas conveying pipe20is in threaded connection with the fastener50. Alternatively, other means can be used to connect the fastener50to the first gas conveying pipe20.

Based on the connection between the first gas conveying pipe20and the fastener50, the fastener50is formed with an indentation52on the side facing the press plate40. The first end12is extended with a tube portion15. The tube portion15goes through the press plate40and into the indentation52.

The preferred embodiment further comprises a restriction structure60, wherein the restriction structure60is connected to the first gas conveying pipe20. The restriction structure60is used to restrict the container90. When the air bag10is fitted on the container90, the restriction structure60forms a restriction to the container90, the restriction structure60also forms a restriction to the air bag10. When the air bag10is inflated and deformed, the air entering the air chamber11will form a pressure against the air bag10, preventing the air bag10from falling apart from the mouth92. Thus, the air bag10can provide good air-tightness. The abutting surface14will expand toward the inside of the container90and be tightly pressed against the inner wall94to form air-tight blocking. The restriction structure60is a prior art known by those skilled in the art and its structure is not detailed herein.

The second gas conveying pipe30is axially connected on the first gas conveying pipe20. The second gas conveying pipe30has two air-tight connecting portions31. Each air-tight connecting portion31is configured along the axial direction of the second gas conveying pipe30. Each air-tight connecting portion31is respectively connected with the first gas conveying pipe20in an air-tight manner. An air passage70is formed inside the first gas conveying pipe20, and the air passage70is located between the air-tight connecting portions31. The air passage70encloses the peripheral side of the second gas conveying pipe30to form a ring shape. The first gas conveying pipe20is formed with a first air conveying port21and a second air conveying port22. The first air conveying port21is communicated with the air passage70and the outside environment. The second air conveying port22is communicated with the air passage70and the air chamber11. Thus, air can go through the first air conveying port21, the second air conveying port22and the air passage70into or away from the air chamber11.

Each air-tight connecting portion31is respectively sleeved with a first O-ring32. Each first O-ring32is respectively pressed tightly against the first gas conveying pipe20, so that each air-tight connecting portion31is respectively connected with the first gas conveying pipe20in an air-tight manner, to prevent air from going through the gap between the first gas conveying pipe20and the second gas conveying pipe30and leaking outward.

The second gas conveying pipe30is provided with a stopping piece33, the second gas conveying pipe30is formed with a ring-shaped limiting surface34, the stopping piece33and the limiting surface34relatively limit the first gas conveying pipe20, so as to relatively position the first gas conveying pipe20and the second gas conveying pipe30; the stopping piece33optionally abuts against the second end13, so as to relatively position the air bag10and the second gas conveying pipe30; the stopping piece33is in threaded connection with the second gas conveying pipe30.

The preferred embodiment further comprises a connecting pipe80, wherein the connecting pipe80is configured on the first gas conveying pipe20, and the connecting pipe80is communicated with the first gas conveying pipe20, so that an external pipe (not shown in the figure) can be connected to the connecting pipe80, to guide air into or away from the air chamber11; the first gas conveying pipe20is optionally sleeved with a plurality of second O-rings23, each second O-ring23is respectively pressed tightly against the connecting pipe80, so that the first gas conveying pipe20and the connecting pipe80are connected in an air-tight manner.