Breathing pipeline

Abstract

The utility model relates to a breathing pipeline which is applied to a breathing machine, and the breathing pipeline comprises an air guide pipe, an air inlet pipe, a gas outlet pipe, a gas outlet pipe and a gas outlet pipe, the air guide pipe is provided with an air guide cavity, and an opening capable of communicating with the outside is formed in the end of the air guide cavity; the connector is inserted into the air guide cavity from the opening, and the connector is in interference fit with the air guide cavity so as to seal the air guide cavity. The air guide pipe and the connector are fixedly connected in an interference fit mode, so that a glue joint layer can be omitted, and the air guide pipe and the connector are directly connected. On one hand, the glue joint layer is prevented from generating volatile substances harmful to the human body in the high-temperature and high-humidity environment, and therefore the use safety of the breathing pipeline is improved. And meanwhile, the influence on the connection strength between the air guide pipe and the joint due to the damage of the glue joint layer can be prevented, so that the connection strength between the air guide pipe and the joint is improved, and the air tightness of the air guide cavity is also improved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a breathing tubing. Background Technology

[0002] A ventilator is a medical device primarily used to assist or replace a patient's breathing, especially when the patient's ability to breathe spontaneously is impaired or lost. It maintains the patient's vital signs by delivering oxygen and / or a mixture of gases to the lungs. Breathing tubing is mainly used in ventilators and is used to deliver gas to the patient. Breathing tubing typically includes an airway and connectors, which are interconnected. However, in traditional breathing tubing, the airway and connectors are generally connected by an intermediate material. Given the high temperature and humidity environment inside the breathing tubing, this intermediate material can produce volatile substances harmful to the human body under such conditions, thus affecting the safety of the breathing tubing. Utility Model Content

[0003] One of the technical problems addressed by this application is how to improve the safety of breathing tubing use.

[0004] A breathing circuit for use in a ventilator, the breathing circuit comprising:

[0005] An air duct, the air duct having an air duct cavity, the end of the air duct cavity forming an opening capable of communicating with the outside; and

[0006] A connector is inserted into the air guide cavity from the opening, and the connector and the air guide cavity are interference-fitted to seal the air guide cavity.

[0007] In one embodiment, the air guide tube includes a corrugated section and a connecting section, the corrugated section and the connecting section are connected to each other and together form the air guide cavity, the outer surface of the corrugated section is uneven and corrugated, the outer surface of the connecting section is flat and straight, and the connector is connected to the connecting section.

[0008] In one embodiment, the wall thickness of the connecting pipe section is uniformly distributed along the axial direction of the air guide pipe.

[0009] In one embodiment, the wall thickness error of the connecting pipe section is less than 0.05 mm.

[0010] In one embodiment, the connector includes an abutment section and an insertion section. The cross-sectional dimension of the abutment section is larger than the diameter of the air guide cavity. The abutment section is connected to the insertion section and is located outside the air guide cavity and abuts against the end of the air guide tube. The insertion section is interference-fitted with the air guide cavity.

[0011] In one embodiment, the insertion segment includes a first segment and a second segment, the second segment being connected between the first segment and the abutment segment, extending from the first segment to the first segment along the axial direction of the insertion segment, the cross-sectional size of the first segment gradually decreasing, and the second segment being interference-fitted with the air guide cavity.

[0012] In one embodiment, the second segment includes a mating portion and a spacer portion. The mating portion is connected to the first segment and has an interference fit with the air guide cavity. The spacer portion is connected between the mating portion and the abutting segment. The cross-sectional dimension of the spacer portion is smaller than that of the mating portion. Along the axial direction perpendicular to the air guide cavity, the spacer portion is spaced apart from the air guide tube to form a gap space.

[0013] In one embodiment, the abutting section includes an abutting portion and a convex ring connected to each other, the abutting portion being connected to the insertion section and abutting against the air guide tube, and the convex ring being sleeved on the abutting portion.

[0014] In one embodiment, the air duct is formed using an extrusion process.

[0015] In one embodiment, the air duct comprises polypropylene and polyethylene materials.

[0016] One technical advantage of one embodiment of this application is that, since the airway tube and connector are fixedly connected by an interference fit, the adhesive layer can be eliminated, allowing the airway tube and connector to be directly connected. This avoids the adhesive layer from producing harmful volatile substances in high-temperature and high-humidity environments, thereby improving the safety of the breathing tubing. It also prevents damage to the adhesive layer from affecting the connection strength between the airway tube and connector, thus improving the connection strength and airtightness of the airway chamber. Furthermore, it saves on adhesive usage, reducing the manufacturing cost of the breathing tubing. Additionally, it eliminates the need for adhesive coating processes and complex processes to control adhesive usage, thereby improving the efficiency of breathing tubing processing and ultimately further reducing the manufacturing cost of the breathing tubing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the planar structure of a breathing tubing provided in one embodiment.

[0018] Figure 2 for Figure 1 The diagram shows a planar cross-sectional view of the breathing tubing in its assembled state.

[0019] Figure 3 for Figure 1 The diagram shows a planar cross-sectional view of the breathing tubing in a disassembled state.

[0020] Reference numerals: Breathing tubing 10: air delivery tube 100, air delivery chamber 130, corrugated tube section 110, connecting tube section 120, connector 200, abutting section 210, abutting part 211, protruding ring 212, insertion section 220, first section 221, second section 222, mating part 2221, spacer part 2222, spacer space 2223. Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0022] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not 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 of this application.

[0023] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," 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 or an electrical 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0027] See Figure 1 , Figure 2 and Figure 3 In one embodiment of this application, a breathing tubing 10 is provided for use in a ventilator. The breathing tubing 10 includes an air delivery tube 100 and a connector 200. The air delivery tube 100 has an air delivery cavity 130, and an opening is formed at the end of the air delivery cavity 130. When the air delivery tube 100 exists alone, this opening can directly communicate with the outside. The connector 200 can be inserted into the air delivery cavity 130 through this opening, and the connector 200 and the air delivery cavity 130 are interference-fitted. This achieves an interference-fit connection between the connector 200 and the air delivery cavity 130, that is, a fixed connection between the connector 200 and the air delivery tube 100 is achieved through an interference-fit connection. On the other hand, the connector 200 can provide a good seal for the air delivery cavity 130, improving the airtightness of the air delivery cavity 130.

[0028] If the airway tube 100 and connector 200 are fixedly connected by adhesive bonding, where the liquid adhesive cures into a solid adhesive layer, and the airway tube 100 and connector 200 are fixedly connected through this adhesive layer, then, firstly, the airway cavity 130 is a high-temperature and high-humidity environment, and the chemical composition of the adhesive layer is relatively complex, causing the adhesive layer to produce volatile substances harmful to the human body in this environment, thus affecting the safety of the breathing tubing 10. Simultaneously, as the adhesive layer continues to evaporate and deteriorate, it will also affect the connection strength between the airway tube 100 and connector 200, as well as the airtightness of the airway cavity 130. Secondly, the presence of the adhesive layer will increase the manufacturing cost of the breathing tubing 10. The adhesive application process will consume a long time, and special processes are needed to control the amount of adhesive used, which will also prolong the curing time of the adhesive layer and increase its manufacturing cost.

[0029] Regarding the breathing tubing 10 in the above embodiments, since the airway 100 and the connector 200 are fixedly connected by an interference fit, the adhesive layer can be eliminated, allowing the airway 100 and connector 200 to be directly connected. This avoids the adhesive layer from producing harmful volatile substances in high-temperature and high-humidity environments, thus improving the safety of the breathing tubing 10. It also prevents damage to the adhesive layer from affecting the connection strength between the airway 100 and connector 200, thereby improving the connection strength and the airtightness of the air delivery chamber 130. Furthermore, it saves on adhesive usage, reducing the manufacturing cost of the breathing tubing 10. Additionally, it eliminates the need for adhesive coating processes and complex processes to control the amount of adhesive used, improving the processing efficiency of the breathing tubing 10 and ultimately further reducing its manufacturing cost.

[0030] See Figure 1 , Figure 2 and Figure 3In some embodiments, the air guide tube 100 includes a corrugated section 110 and a connecting section 120, which are interconnected and together form an air guide cavity 130. The outer surface of the corrugated section 110 is corrugated with uneven surfaces, which gives it structural strength and makes it easy to deform for different applications. The outer surface of the connecting section 120 is flat and straight. The connector 200 is connected to the connecting section 120, which improves the connection strength between the connector 200 and the connecting section 120, allowing the connector 200 to be quickly inserted between the connecting sections 120. This improves the assembly accuracy and efficiency between the connector 200 and the air guide tube 100, and also reduces the manufacturing cost of the air guide tube 100 to some extent. There are two connecting pipe sections 120, which are set at opposite ends of the corrugated pipe section 110. There are also two connectors 200, which are inserted into different connecting pipe sections 120 respectively.

[0031] See Figure 1 , Figure 2 and Figure 3 In some embodiments, the wall thickness of the connecting pipe segment 120 is uniformly distributed along the axial direction of the air guide tube 100. This ensures a relatively uniform interference fit force between the connector 200 and the connecting pipe segment 120, guaranteeing a uniform wrapping force between the connecting pipe segment 120 and the connector 200, thereby improving the connection strength between them. Experimental data shows that when the wall thickness of the connecting pipe segment 120 is uniformly distributed, the wrapping force between the connecting pipe segment 120 and the connector 200 is not less than 45N. To ensure the uniformity of the wall thickness of the connecting pipe segment 120, the error in the wall thickness of the connecting pipe segment 120 is less than 0.05mm during manufacturing. This effectively guarantees the uniformity of the wall thickness of the connecting pipe segment 120, thus ensuring a high connection strength between the connector 200 and the connecting pipe segment 120.

[0032] See Figure 1 , Figure 2 and Figure 3In some embodiments, the connector 200 includes an abutment section 210 and an insertion section 220, which can be coaxially arranged and connected to each other. The cross-sectional dimension of the abutment section 210 is larger than the diameter of the air guide cavity 130, and the insertion section 220 is interference-fitted with the air guide cavity 130. When the connector 200 and the air guide tube 100 are assembled, the abutment section 210 cannot enter the air guide cavity 130 and remains outside the air guide cavity 130, allowing the abutment section 210 to abut against the end of the air guide tube 100. This achieves axial positioning of the abutment section 210 relative to the air guide tube 100, thereby improving the assembly accuracy and efficiency between the connector 200 and the air guide tube 100. Meanwhile, the insertion section 220 is inserted into the air guide cavity 130 formed by the connecting pipe section 120, and the insertion section 220 and the air guide cavity 130 are interference-fitted, thus realizing the interference connection relationship between the insertion section 220 and the connecting pipe section 120.

[0033] See Figure 1 , Figure 2 and Figure 3 In some embodiments, the insertion segment 220 includes a first segment 221 and a second segment 222, which can be coaxially arranged and connected to each other. The second segment 222 connects the first segment 221 and the abutment segment 210, such that the first segment 221 is further away from the abutment segment 210 relative to the second segment 222. Along the axial direction of the insertion segment 220 from the first segment 221 to the first segment 221, the cross-sectional size of the first segment 221 gradually decreases, thus making the first segment 221 approximately conical. The second segment 222 is interference-fitted with the air guide cavity 130. Given that the first segment 221 is roughly conical in shape, and along the axial direction perpendicular to the insertion segment 220 (which can also be understood as along the radial direction of the insertion segment 220), the first segment 221 is spaced apart from the connecting pipe segment 120, so that the first segment 221 does not contact the inner wall surface of the air guide cavity 130, while the second segment 222 contacts the inner wall surface of the air guide cavity 130, thereby ensuring an interference fit between the second segment 222 and the air guide cavity 130. By setting the insertion segment 220 with the first segment 221, the first segment 221 can play a good guiding role during the insertion of the insertion segment 220 into the air guide cavity 130, reducing the interference and frictional resistance generated during the insertion of the insertion segment 220 into the air guide cavity 130 to a certain extent, ensuring that the insertion segment 220 is smoothly inserted into the air guide cavity 130, thereby improving the assembly efficiency and assembly accuracy between the connector 200 and the air guide tube 100.

[0034] See Figure 1 , Figure 2 and Figure 3In some embodiments, the second segment 222 includes a mating portion 2221 and a spacer portion 2222. The mating portion 2221 is connected to the first segment 221, and the mating segment is press-fitted with the air guide cavity 130. The spacer portion 2222 is connected between the mating portion 2221 and the abutment portion 210, and the cross-sectional dimension of the spacer portion 2222 is smaller than the cross-sectional dimension of the mating portion 2221. Along the axial direction perpendicular to the air guide cavity 130, which can be understood as the radial direction of the air guide cavity 130, the spacer portion 2222 is spaced apart from the air guide tube 100 by a gap space 2223, that is, the spacer portion 2222 maintains a non-contact relationship with the inner wall surface of the air guide cavity 130. During the insertion of connector 200 into air guide cavity 130, while ensuring an interference fit between the mating section and air guide cavity 130 to achieve a reasonable connection strength between connector 200 and air guide tube 100, the frictional resistance of connector 200 during insertion can be reasonably reduced, thereby improving the assembly efficiency and accuracy between connector 200 and air guide tube 100. Alternatively, in other embodiments, a sealing ring can be provided within the interval space 2223, which can effectively seal the air guide cavity 130, thereby improving its airtightness.

[0035] See Figure 1 , Figure 2 and Figure 3 In some embodiments, the abutment section 210 includes an abutment portion 211 and a protruding ring 212, which are connected to each other, for example, the abutment portion 211 and the protruding ring 212 can be integrally formed. The abutment portion 211 is connected to the insertion section 220 and abuts against the air guide tube 100. The protruding ring 212 is sleeved on the outer circumferential surface of the abutment portion 211, so the protruding ring 212 protrudes a certain height relative to the abutment portion 211 along the radial direction of the air guide cavity 130. By providing the protruding ring 212, during the process of inserting the connector 200 into the air guide cavity 130, the protruding ring 212 can provide abutment force for the relevant tooling, ensuring that the connector 200 is smoothly inserted into the air guide cavity 130, thus improving the assembly efficiency and assembly accuracy between the connector 200 and the air guide tube 100.

[0036] In some embodiments, the air duct 100 is formed by extrusion, which can improve the uniformity of the wall thickness of the connecting pipe section 120, thereby ensuring a relatively uniform interference fit between the connector 200 and the connecting pipe section 120, ensuring that the connecting pipe section 120 forms a uniform wrapping force on the connector 200, and ultimately improving the connection strength between the connector 200 and the connecting pipe section 120.

[0037] In some embodiments, the air guide tube 100 comprises polypropylene and polyethylene materials, meaning the air guide tube 100 can be formed by copolymerizing polypropylene and polyethylene materials. For example, in the manufacturing process of the air guide tube 100, polypropylene accounts for two to four parts, and polyethylene accounts for six to eight parts. This can improve the wrapping force of the connecting pipe section 120 on the connector 200, and also reasonably increase the friction coefficient of the connecting pipe section 120, thereby increasing the static friction between the connecting pipe section 120 and the connector 200, effectively preventing the connector 200 from coming out of the connecting pipe section 120, and further improving the connection strength between the connector 200 and the connecting pipe section 120.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A breathing tubing for use in a ventilator, characterized in that, The breathing conduit comprises: an air guide tube having an air guide cavity, an end of the air guide cavity forming an opening capable of communicating with the outside; and a joint inserted into the air guide cavity from the opening, and the joint and the air guide cavity being in interference fit to seal the air guide cavity.

2. Breathing tube according to claim 1, characterized in that The air guide tube comprises a corrugated tube section and a connecting tube section, the corrugated tube section and the connecting tube section being connected to each other and collectively enclosing the air guide cavity, an outer surface of the corrugated tube section being in a concave-convex corrugated shape, an outer surface of the connecting tube section being in a flat and straight shape, and the joint being connected to the connecting tube section.

3. Breathing tube according to claim 2, characterized in that Along an axial direction of the air guide tube, the wall thickness of the connecting tube section is uniformly arranged.

4. Breathing tube according to claim 3, characterized in that An error of the wall thickness of the connecting tube section is less than 0.05 mm.

5. The breathing tube of claim 1, wherein, The joint comprises an abutting section and an inserted section, a cross-sectional dimension of the abutting section being greater than a caliber of the air guide cavity, the abutting section being connected to the inserted section and located outside the air guide cavity and abutting against an end of the air guide tube, and the inserted section being in interference fit with the air guide cavity.

6. Breathing tube according to claim 5, characterized in that The inserted section comprises a first section and a second section, the second section being connected between the first section and the abutting section and pointing from the first section to the first section along an axial direction of the inserted section, a cross-sectional dimension of the first section gradually decreasing, and the second section being in interference fit with the air guide cavity.

7. Breathing tube according to claim 6, characterized in that The second section comprises a fitting part and a spacing part, the fitting part being connected to the first section and in interference fit with the air guide cavity, the spacing part being connected between the fitting part and the abutting section, a cross-sectional dimension of the spacing part being less than a cross-sectional dimension of the fitting part, and along a direction perpendicular to an axial direction of the air guide cavity, the spacing part and the air guide tube are spaced apart to form a spacing space.

8. The breathing tube of claim 5, wherein, The abutting section comprises an abutting part and a protruding ring connected to each other, the abutting part being connected to the inserted section and abutting against the air guide tube, and the protruding ring being sleeved on the abutting part.

9. The breathing tube of claim 1, wherein, The air guide tube is formed by an extrusion process.

10. The breathing tube of claim 1, wherein, The air guide tube comprises a polypropylene material and a polyethylene material.

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