Air pressure inner expansion type coil pipe sealing structure and coil pipe

Abstract

This utility model belongs to the technical field of anesthesia equipment, specifically a pneumatically expanded coil sealing structure and a coil. The pneumatically expanded coil sealing structure includes an integrally formed sealing lip and a connecting portion connecting the sealing lip; the sealing lip includes a side sealing lip and a middle sealing lip; the side sealing lip includes a root portion, a side lip edge, and a middle lip edge; the side lip edge and the middle lip edge are disposed on the root portion and form a side lip opening that clamps the side wall of the coil; the middle sealing lip includes a middle root portion and two middle lip edges, the two middle lip edges being disposed on the middle root portion and forming a middle lip opening that clamps the middle side wall of the coil. This structure uses a lip-shaped structure to contact the side wall of the coil, relying on the gas pressure inside the coil to press the sealing ring lip edge against the side wall of the coil, thereby achieving a seal. It does not require a dense array of screws to ensure clamping force and is simple to install.

Description

Technical Field

[0001] This utility model belongs to the field of anesthesia equipment technology, specifically a pneumatic internal tension coil sealing structure and coil. Background Technology

[0002] The anesthesia machine coil adopts a coaxial layered structure to extend the airflow length as much as possible within a certain volume, so as to achieve precise control of anesthetic gas and driving gas. It can accurately control tidal volume and positive end-expiratory pressure. The tubing inside the coil is very long, generally 3-4 meters. Ensuring the airtightness of the layered structure over such a long distance is crucial.

[0003] Currently, there are generally two types of sealing structures used in anesthesia machine coils on the market: one is to design a groove on the coil and insert a sealing ring with a diamond-shaped or other irregular cross-section into the groove. The seal is achieved by the compression and rebound of the sealing ring. There is a risk of leakage when the clamping force is insufficient. During installation, the sealing ring needs to be carefully inserted into the groove manually, and glue needs to be applied to the joints, which is troublesome. The second type is to make the sealing ring into an irregular mesh structure with the ends connected. Similarly, the sealing ring needs to be inserted into the groove of the coil manually, which is also troublesome. There is also a certain risk of leakage when the clamping force is insufficient. Utility Model Content

[0004] The purpose of this invention is to overcome the defects of the prior art and propose a pneumatic internal expansion coil sealing structure. This structure uses a lip-shaped structure to contact the side wall of the coil. It relies on the gas pressure inside the coil to press the lip of the sealing ring against the side wall of the coil, thereby achieving a seal. It does not require a dense array of screws to ensure the clamping force and is easy to install.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pneumatic internally expanded coil sealing structure includes an integrally formed sealing lip and a connecting part that connects to the sealing lip.

[0007] The sealing lip includes a side sealing lip and a middle sealing lip;

[0008] The edge sealing lip includes an edge root, an edge lip, and a middle lip; the edge lip and the middle lip are disposed on the edge root and form an edge lip opening that clamps the side wall of the coil.

[0009] The central sealing lip includes a central root and two central lip edges, which are disposed on the central root and form a central lip opening that clamps the central sidewall of the coil.

[0010] Preferably, a pressure groove is provided at the connection between the connecting part and the edge lip or the middle lip.

[0011] Preferably, the pressure groove is a V-shaped pressure groove.

[0012] This utility model also provides a coil, which includes a coil body, a coil cover, and the above-mentioned pneumatic internal tension coil sealing structure.

[0013] The coil body is provided with a spiral annular air passage, and the air passage wall includes the side wall of the coil and the middle side wall of the coil.

[0014] The outermost sidewall of the coil is the outermost sidewall of the spiral annular air passage, and the middle sidewall of the coil is the middle sidewall of the spiral annular air passage.

[0015] The coil cover is provided with a groove for a spiral annular sealing lip that accommodates the internally tensioned coil sealing structure.

[0016] Compared with the prior art, the technical advantages of this utility model are as follows:

[0017] 1. The installation of the coil sealing structure of this utility model does not require attention to the direction of the sealing disc, and there is no problem with poor sealing caused by installation issues.

[0018] 2. This utility model adopts a double-lip structure, which relies on gas pressure for self-sealing and gas pressure to press and seal the end face, resulting in better sealing performance. It can also greatly reduce the need for screw tightening, reduce the number of screws, and improve assembly efficiency.

[0019] 3. This utility model can reduce the wall thickness of the coil, effectively reduce the product weight, and reduce costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the upper surface structure of the coil sealing structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the lower surface structure of the coil sealing structure of this utility model;

[0022] Figure 3 This is an assembly sectional view of the coil sealing structure of this utility model;

[0023] Figure 4 This is an exploded view of the coil of this utility model;

[0024] Figure label:

[0025] 1. Sealing lip; 2. Connecting part; 3. Side sealing lip; 4. Middle sealing lip; 5. Side root; 6. Side lip edge; 7. Middle lip edge; 8. Side lip opening; 9. Middle root; 10. Coil side wall; 11. Coil middle wall; 12. Middle lip opening; 13. Pressure groove; 14. Coil body; 15. Coil gland; 16. Spiral annular air passage; 17. Groove. Detailed Implementation

[0026] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0027] Example 1

[0028] like Figure 1-4 As shown, a pneumatic internally expanded coil sealing structure includes an integrally formed sealing lip 1 and a connecting part 2 connecting the sealing lip 1.

[0029] like Figure 1-2 As shown, the sealing lip 1 includes a side sealing lip 3 and a middle sealing lip 4;

[0030] like Figure 3 As shown, the edge sealing lip 3 includes an edge root portion 5, an edge lip 6, and a middle lip 7; the edge lip 6 and the middle lip 7 are disposed on the edge root portion 5 and form an edge lip opening 8 that clamps the side wall 10 of the coil.

[0031] The central sealing lip 4 includes a central root 9 and two central lip edges 7, which are disposed on the central root 9 and form a central lip opening 12 that clamps the central side wall 11 of the coil.

[0032] A pressure groove 13 is provided at the connection between the connecting part 2 and the side lip 6 or the middle lip 7.

[0033] The pressure groove 13 is a V-shaped pressure groove. When gas is introduced into the air passage, the pressure of the gas will press the lip tightly against the side wall.

[0034] like Figure 4 As shown, a coil includes a coil body 14, a coil cap 15, and the aforementioned pneumatic internal tension coil sealing structure.

[0035] The coil body 14 is provided with a spiral annular air passage 16, and the air passage wall includes the coil side wall 10 and the coil middle side wall 11.

[0036] The outermost sidewall 10 of the coil is the outermost sidewall of the spiral annular air passage 16, and the middle sidewall 11 of the coil is the middle sidewall of the spiral annular air passage.

[0037] The coil cap 15 is provided with a groove 17 to accommodate the spiral annular sealing lip 1 of the internally tensioned air coil sealing structure. During use, the coil cap 15 presses the coil sealing structure tightly through the groove 17 to prevent it from moving or coming off, and works in conjunction with the lip structure on the lower surface of the coil sealing structure to achieve a better sealing effect.

[0038] In this invention, the lower surface of the coil sealing structure is in contact with the protruding side wall of the spiral annular air passage 16 on the coil body 14, and the sealing lip 1 clamps the side wall of the coil. When air is introduced into the coil, the gas pressure will press the lip of the sealing lip 1 against the side wall of the coil, thereby achieving self-sealing. The coil cover 15 is pressed on the upper surface of the coil sealing structure and fixed with screws to prevent the sealing structure from falling out.

[0039] For any content not described in detail in this utility model, conventional technical knowledge in the field can be used.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solution of this utility model do not depart from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A gas pressure internal bellows coil seal, comprising: The pneumatic internal expansion coil sealing structure includes an integrally formed sealing lip and a connecting part that connects to the sealing lip. The sealing lip includes a side sealing lip and a middle sealing lip; The edge sealing lip includes an edge root, an edge lip, and a middle lip; the edge lip and the middle lip are disposed on the edge root and form an edge lip opening that clamps the side wall of the coil. The central sealing lip includes a central root and two central lip edges, which are disposed on the central root and form a central lip opening that clamps the central sidewall of the coil.

2. The pneumatic, inboard expanding coil seal structure of claim 1, wherein, A pressure groove is provided at the connection between the connecting part and the edge lip or the middle lip.

3. The pneumatic internal tension coil sealing structure according to claim 2, characterized in that, The pressure groove is a V-shaped pressure groove.

4. A coil, characterized by The coil includes a coil body, a coil cap, and the pneumatic internal tension coil sealing structure as described in any one of claims 1-3; The coil body is provided with a spiral annular air passage, and the air passage wall includes the side wall of the coil and the middle side wall of the coil. The outermost sidewall of the coil is the outermost sidewall of the spiral annular air passage, and the middle sidewall of the coil is the middle sidewall of the spiral annular air passage. The coil cover is provided with a groove for a spiral annular sealing lip that accommodates the internally tensioned coil sealing structure.

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