Y-shaped medical gas flow dividing pipe

Abstract

The application relates to the technical field of medical devices, and discloses a Y-shaped medical gas shunt pipe which comprises a main pipe, a Y-shaped three-way pipe body, two flexible connecting branch pipes and two roller type adjusting mechanisms, the Y-shaped three-way pipe body has one gas inlet end and two gas outlet ends, the gas inlet end is connected with the main pipe, the two flexible connecting branch pipes are respectively connected with the two gas outlet ends, and the two roller type adjusting mechanisms are respectively installed on the two flexible connecting branch pipes; the roller type adjusting mechanism is configured to adjust the gas flow gap in the flexible connecting branch pipe by changing the radial compression amount of the flexible connecting branch pipe. In this way, the radial compression degree of the corresponding flexible connecting branch pipe can be independently changed by each roller adjusting mechanism, the internal gas flow gap of the flexible connecting branch pipe is continuously adjusted, the output gas of each path can be adjusted at any opening degree from full closing to full opening, and in addition, the complicated connecting pieces and sealing structures required by multiple independent valves (such as needle valves and ball valves) are not needed.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a Y-shaped medical gas shunt tube. Background Technology

[0002] In the field of medical fluid control, especially in intravenous infusion therapy, the Robert Clamp, as a classic mechanical flow regulating device, has been widely used for a long time. Its basic working principle is based on the continuous variation of the gap between the roller and the fixed base as a roller rolls within an inclined groove, thereby applying progressive pressure to the tubing passing through it and achieving stepless flow regulation. This device is compact, intuitive to operate, and offers high control precision, meeting the clinical needs for fine-tuning of fluid infusion rates, and has therefore become a standard component in disposable infusion sets.

[0003] However, the current applications of Robert clamps are mainly limited to single infusion lines, and they usually exist as independent accessories. There is no precedent for integrating their adjustment principle with a multi-way splitting structure (such as a Y-connector). In medical gas therapy, such as oxygen inhalation, nebulization therapy, or anesthetic gas delivery, it is often necessary to split one gas source into two outputs to simultaneously meet the needs of different treatment terminals or patients. Currently, there are two main methods for achieving gas splitting in clinical practice: one is to use complex gas circuit components composed of multiple independent valves, which can be precisely controlled but are costly, cumbersome to operate, and not easy to carry; the other is to use simple T-joints or Y-connectors, which can only achieve a fixed ratio of splitting and cannot independently and continuously adjust the flow rate of each gas line, let alone achieve dynamic adjustment without stopping the system. Summary of the Invention

[0004] The main objective of this invention is to provide a Y-type medical gas shunt tube, which aims to improve upon the shortcomings of the prior art and solve the problem that the Y-type medical gas shunt tube is difficult to independently and continuously adjust the flow rate of each gas stream.

[0005] To achieve the above objectives, the present invention provides a Y-type medical gas shunt tube, comprising: The main pipe is used to connect to the medical gas supply terminal; The Y-shaped three-way pipe body has one air inlet end and two air outlet ends, and the air inlet end is connected to the main pipe; Two flexible connecting branch pipes are respectively connected to the two air outlets; Two roller-type adjustment mechanisms are respectively installed on the two flexible connecting branch pipes. The roller-type adjustment mechanisms are configured to adjust the gas flow gap inside the flexible connecting branch pipe by changing the radial pressure of the flexible connecting branch pipe.

[0006] Optionally, the roller-type adjustment mechanism includes: A clamp is connected to the flexible connecting branch pipe. The clamp is provided with a receiving groove and a guide groove. The guide groove is located on both side walls of the clamp and is connected to the receiving groove. The extension direction of the guide groove is set at an angle of 15° to 30° with the axis of the flexible connecting branch pipe. An adjusting roller is installed in the receiving groove, and the adjusting roller can roll in the receiving groove along the extension direction of the guide groove; The bottom of the clamp has a pressure bearing surface opposite to the outer peripheral surface of the adjusting roller, and a pressure gap is formed between the pressure bearing surface and the adjusting roller for the flexible connecting branch pipe to pass through.

[0007] Optionally, the angle between the extension direction of the guide groove and the axis of the flexible connecting branch pipe is 20°, the diameter of the adjusting roller is 8mm~12mm, and when the adjusting roller moves along the extension direction of the guide groove from one end of the guide groove away from the pressure bearing surface to one end of the guide groove close to the pressure bearing surface, the gap width of the pressure gap continuously decreases from 3mm to 0mm.

[0008] Optionally, the clamp and the flexible connecting branch pipe are made into an integral component by an integral molding process. The clamp extends outward from the outer wall of the flexible connecting branch pipe, and one end of the flexible connecting branch pipe is fixedly bonded to the Y-shaped tee pipe body by hot melt adhesive.

[0009] Optionally, the clamp and the flexible connecting branch pipe are separate structures. The clamp is provided with an elastic fastener, and the outer wall of the flexible connecting branch pipe is provided with an annular groove. At least a portion of the elastic fastener is embedded in the annular groove.

[0010] Optionally, the outer circumferential surface of the adjusting roller is provided with multiple anti-slip teeth, and the cross-section of the anti-slip teeth is triangular or trapezoidal.

[0011] Optionally, limiting protrusions are provided at both ends of the guide groove, and the height of the limiting protrusions is less than or equal to half the depth of the guide groove.

[0012] Optionally, the pressure bearing surface is an arc-shaped concave surface, and the radius of curvature of the arc-shaped concave surface is greater than or equal to the radius of the flexible connecting branch pipe.

[0013] Optionally, the outer surface of the Y-shaped three-way pipe is provided with a gas flow direction arrow mark, the arrows of the gas flow direction arrow mark pointing to the two gas outlet ends respectively, and the outer side wall of the clamp is provided with a flow opening scale line, the flow opening scale line being arranged along the extension direction of the guide groove. The flow rate scale line includes a first scale mark corresponding to the fully open position, a second scale mark corresponding to the fully closed position, and several intermediate scale lines located between the first scale mark and the second scale mark.

[0014] Optionally, the included angle between the two flexible connecting branches is 45° to 90°.

[0015] Beneficial effects: The Y-type medical gas shunt tube proposed in this invention includes a main tube, a Y-type tee tube body, two flexible connecting branch tubes, and two roller-type adjustment mechanisms. The main tube is used to connect to a medical gas source terminal; the Y-type tee tube body has one inlet end and two outlet ends, with the inlet end connected to the main tube; the two flexible connecting branch tubes are respectively connected to the two outlet ends; the two roller-type adjustment mechanisms are respectively installed on the two flexible connecting branch tubes, and the roller-type adjustment mechanisms are configured to adjust the gas flow gap inside the flexible connecting branch tube by changing the radial pressure of the flexible connecting branch tube. With this design, each roller adjustment mechanism can independently change the radial compression degree of the corresponding flexible connecting branch pipe, thereby continuously adjusting the internal gas flow gap. Compared with the simple Y-type connector that can only achieve a fixed proportion of flow splitting, the Y-type medical gas shunt tube provided in this application allows for arbitrary opening degree adjustment of each output gas from fully closed to fully open. In addition, it eliminates the need for complex connecting parts and sealing structures required by multiple independent valves (such as needle valves and ball valves), making the overall size of the Y-type medical gas shunt tube small and lightweight, and easy to store and carry. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a front view of the Y-shaped medical gas shunt disclosed in this application; Figure 2 This is a three-dimensional structural diagram of the Y-shaped medical gas shunt tube disclosed in this application; Figure 3 This is one of the three-dimensional structural schematic diagrams of the roller-type adjustment mechanism disclosed in this application; Figure 4 This is the second three-dimensional structural schematic diagram of the roller-type adjustment mechanism disclosed in this application.

[0018] Explanation of icon numbers: 1. Main pipe; 2. Y-type tee pipe body; 3. Flexible connection branch pipe; 4. Roller-type adjustment mechanism; 41. Clamp; 411. Receiving groove; 412. Guide groove; 413. Pressure bearing surface; 414. Elastic fastener; 415. Limiting protrusion; 42. Adjusting roller; 421. Anti-slip serration; 5. Gas flow direction arrow mark; 6. Flow opening scale line; 61. First scale mark; 62. Second scale mark; 63. Middle scale line.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0022] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean 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 according to the specific circumstances.

[0023] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0024] In the field of medical fluid control, especially in intravenous infusion therapy, the Robert Clamp, as a classic mechanical flow regulating device, has been widely used for a long time. Its basic working principle is based on the continuous variation of the gap between the roller and the fixed base as a roller rolls within an inclined groove, thereby applying progressive pressure to the tubing passing through it and achieving stepless flow regulation. This device is compact, intuitive to operate, and offers high control precision, meeting the clinical needs for fine-tuning of fluid infusion rates, and has therefore become a standard component in disposable infusion sets.

[0025] However, the current applications of Robert clamps are mainly limited to single infusion lines, and they usually exist as independent accessories. There is no precedent for integrating their adjustment principle with a multi-way splitting structure (such as a Y-connector). In medical gas therapy, such as oxygen inhalation, nebulization therapy, or anesthetic gas delivery, it is often necessary to split one gas source into two outputs to simultaneously meet the needs of different treatment terminals or patients. Currently, there are two main methods for achieving gas splitting in clinical practice: one is to use complex gas circuit components composed of multiple independent valves, which can be precisely controlled but are costly, cumbersome to operate, and not easy to carry; the other is to use simple T-joints or Y-connectors, which can only achieve a fixed ratio of splitting and cannot independently and continuously adjust the flow rate of each gas line, let alone achieve dynamic adjustment without stopping the system.

[0026] See Figures 1-2 As shown, this embodiment provides a Y-type medical gas shunt tube, including a main tube 1, a Y-type tee tube body 2, two flexible connecting branch tubes 3, and two roller-type adjustment mechanisms 4.

[0027] In this embodiment, the main pipe 1 serves as the gas input end of the Y-type medical gas distribution pipe, and its port structure matches the interface of the medical gas source terminal. The main pipe 1 is used for detachable connection with the medical gas source terminal. The medical gas source terminal is typically installed on the walls of wards, in pendants, or on mobile gas supply equipment in medical institutions. The medical gases transported inside include, but are not limited to, medical oxygen, medical compressed air, or medical carbon dioxide.

[0028] The Y-type three-way tube 2 has one inlet end and two outlet ends. The inlet end is fixedly connected to the main tube 1, and the two outlet ends are respectively connected to two flexible connecting branch tubes 3. After the high-pressure or normal-pressure medical gas input from the main tube 1 enters the Y-type three-way tube 2, it is divided into two airflows in the inner cavity of the Y-type three-way tube 2, which flow to the two outlet ends and then into the two flexible connecting branch tubes 3.

[0029] Two roller-type adjustment mechanisms 4 are respectively installed on two flexible connecting branch pipes 3. Each roller-type adjustment mechanism 4 is configured to continuously adjust the gas flow gap inside the flexible connecting branch pipe 3 by changing the radial pressure of its corresponding flexible connecting branch pipe 3.

[0030] With the above structure, each roller-type regulating mechanism 4 can independently change the radial compression degree of its corresponding flexible connecting branch pipe 3, thereby achieving continuous adjustment of the gas flow gap for that path. Compared with the simple Y-type connector that can only achieve a fixed proportion of flow splitting, the Y-type medical gas shunt tube provided in this application allows medical staff to adjust the opening degree of each output gas from fully closed to fully open according to actual clinical needs. For example, when a higher flow rate of oxygen is needed for one patient while another patient only needs a lower flow rate, the two roller-type regulating mechanisms 4 can be adjusted independently to meet different needs. Secondly, this design eliminates the need for complex connecting parts and sealing structures required by multiple independent valves. For example, traditional needle valves or ball valves often require special valve seats, sealing rings, valve stems, and threaded connection structures. However, this application uses the roller-type regulating mechanism 4 in conjunction with the flexible connecting branch pipe 3 to achieve flow regulation through radial compression, greatly simplifying the overall structure. This reduces the overall size of the Y-type medical gas shunt tube, making it easier for clinical medical staff to store and carry, while also reducing manufacturing costs.

[0031] In this embodiment, the main pipe 1 is injection molded from medical-grade polymer material, which includes, but is not limited to, medical-grade polyvinyl chloride, medical-grade polypropylene, or medical-grade acrylonitrile-butadiene-styrene copolymer. The main pipe 1 has a hollow cylindrical structure, and its inner diameter matches the outer diameter of the outlet of a standard medical gas source terminal.

[0032] In this embodiment, the Y-shaped tee pipe body 2 is manufactured using a one-piece injection molding process. Its overall structure is Y-shaped, including one inlet end and two outlet ends. The inlet end is connected to the main pipe 1, and the two outlet ends are respectively connected to two flexible connecting branch pipes 3. The inner cavity of the Y-shaped tee pipe body 2 forms a gas diversion channel. The gas flowing in from the inlet end is divided into two paths in the inner cavity, flowing to the two outlet ends respectively. The one-piece molding structure avoids the leakage risk caused by the assembly gap between multiple parts, and also helps to reduce the overall size of the diversion pipe.

[0033] In a preferred embodiment of this invention, see [link to previous text]. Figure 1 As shown, the included angle between the two flexible connecting branch pipes 3 is within the range of 45° to 90°. Since the flexible connecting branch pipe 3 is connected to the air outlet end, the included angle between the two air outlet ends is basically the same as the included angle between the two flexible connecting branch pipes 3. This design can reduce the risk of the two flexible connecting branch pipes 3 becoming entangled during use. In clinical use scenarios, the two flexible connecting branch pipes 3 are connected to the patient end located in different directions. If the included angle between the two air outlet ends is too small, the two flexible connecting branch pipes 3 are prone to crossing and entanglement, affecting the smoothness of airflow. Secondly, this design also allows medical staff to have sufficient operating space between their hands when operating the two roller-type adjustment mechanisms 4 simultaneously, without affecting the adjustment accuracy due to hand interference.

[0034] Furthermore, in some preferred embodiments, the included angle between the two flexible connecting branches 3 is 60°. While satisfying the aforementioned beneficial effects, the 60° included angle also provides good processability. In injection mold design, the parting surface design for a 60° included angle is relatively simple, demolding is smoother, and this is beneficial for improving production efficiency and product yield.

[0035] In this embodiment, the outer surface of the Y-shaped tee tube 2 is provided with gas flow direction arrow markings 5. These arrow markings 5 ​​are directly injection molded onto the outer surface of the Y-shaped tee tube 2 using a molding process, or formed using post-processing techniques such as laser marking or screen printing. The arrows of the gas flow direction arrow markings 5 ​​point to the two gas outlets. This design helps medical personnel quickly identify the gas flow direction in emergency situations, avoiding incorrect connections due to misjudgment of the flow direction.

[0036] In this embodiment, the flexible connecting branch pipe 3 is made of medical-grade soft polymer material, which includes, but is not limited to, medical-grade polyvinyl chloride, medical-grade thermoplastic polyurethane elastomer, or medical-grade silicone rubber. These materials have appropriate flexibility and elastic recovery ability, and can deform under radial pressure to reduce the internal flow cross section, and recover their original shape and flow capacity by their own elasticity after the pressure is removed.

[0037] In a preferred embodiment, the inner diameter of the flexible connecting branch pipe 3 is in the range of 3 mm to 6 mm.

[0038] Specifically, taking medical oxygen as an example, the oxygen flow rate required for routine adult oxygen therapy is typically between 1 and 5 liters per minute, while the flow rate required for children is even lower. The flexible connecting branch tube 3 has an inner diameter ranging from 3 mm to 6 mm. This design allows the internal flow cross-section to meet the gas flow requirements for routine adult oxygen therapy when the flexible connecting branch tube 3 is in a completely unpressurized, natural state. When the flexible connecting branch tube 3 is subjected to varying degrees of pressure from the roller-type adjustment mechanism 4, its internal flow cross-section can continuously decrease until it is completely closed, thus achieving full-range adjustment from maximum flow rate to zero flow rate to meet the needs of both adults and children.

[0039] Considering that excessive wall thickness would make it difficult for the roller-type adjustment mechanism 4 to effectively compress the flexible connecting branch pipe 3, the adjusting roller 42 would require a large force to roll, affecting the ease of operation; conversely, insufficient wall thickness would result in insufficient compressive strength of the flexible connecting branch pipe 3, and it might deform due to accidental compression in areas not compressed by the roller, affecting the stability of the gas flow. Taking all these factors into account, the wall thickness of the flexible connecting branch pipe 3 in this embodiment is in the range of 0.5 mm to 1.2 mm. This design ensures that the flexible connecting branch pipe 3 has sufficient structural strength to resist unexpected external interference, while also ensuring that the roller-type adjustment mechanism 4 can continuously adjust the internal flow cross section of the flexible connecting branch pipe 3 with a moderate operating force.

[0040] It should be noted that the connection method between the flexible connecting branch pipe 3 and the Y-shaped tee pipe body 2 is one aspect of this embodiment that can have various variations. Depending on different production processes and usage requirements, the flexible connecting branch pipe 3 and the Y-shaped tee pipe body 2 can be connected in two different ways: integral molding or separate assembly.

[0041] In the one-piece molding connection method, the flexible connecting branch pipe 3 and the Y-shaped tee pipe body 2 are formed into a complete integral component through multi-color injection molding or insert injection molding processes. Specifically, firstly, the Y-shaped tee pipe body 2 and the main pipe 1 are injection molded using a relatively rigid material. Then, the pre-formed part of the flexible connecting branch pipe 3 is placed in the corresponding position of the mold, and the flexible connecting branch pipe 3 and the Y-shaped tee pipe body 2 are fused together at the molecular level through secondary injection molding. The connection formed in this way has high reliability and airtightness, and is suitable for application scenarios with high airtightness requirements. However, the one-piece molding process has high requirements for mold design and injection molding equipment, and the production cost is also relatively high.

[0042] In the modular assembly method, the flexible connecting branch tube 3 and the Y-shaped tee tube 2 are manufactured independently and then assembled. In a preferred embodiment, one end of the flexible connecting branch tube 3 is fixedly bonded to the gas outlet end of the Y-shaped tee tube 2 using medical-grade hot melt adhesive. The hot melt adhesive, after being heated to a molten state, is evenly applied to the inner or outer wall of the end of the flexible connecting branch tube 3. The flexible connecting branch tube 3 is then fitted onto the gas outlet end of the Y-shaped tee tube 2, and a strong bond is formed after the hot melt adhesive cools and solidifies. Medical-grade hot melt adhesive has good biocompatibility and chemical stability, is unlikely to contaminate the transported medical gas, and is unlikely to react adversely with moisture or drug components in the gas.

[0043] In a preferred embodiment, the flexible connecting branch pipe 3 and the Y-shaped tee pipe body 2 are connected by a mechanical snap-fit ​​method. This method avoids the use of adhesives, which is not only environmentally friendly but also facilitates disassembly and replacement. Specifically, the clamp 41 is provided with an elastic snap-fit ​​element 414, and the outer wall of the flexible connecting branch pipe 3 is provided with an annular groove. At least a portion of the elastic snap-fit ​​element 414 is embedded in the annular groove to achieve axial positioning.

[0044] See Figures 3-4 As shown, the roller-type adjustment mechanism 4 includes a clamp 41 and an adjustment roller 42.

[0045] The clamp 41 is connected to the flexible connecting branch pipe 3. The clamp 41 is provided with a receiving groove 411 and a guide groove 412. The guide groove 412 is located on both sides of the clamp 41. The extension direction of the guide groove 412 is set at an angle of 15° to 30° with the axis of the flexible connecting branch pipe 3. The adjusting roller 42 is installed in the receiving groove 411. The adjusting roller 42 can roll in the receiving groove 411 along the extension direction of the guide groove 412.

[0046] The guide groove 412 is connected to the receiving groove 411, so that the main body of the adjusting roller 42 can be accommodated in the receiving groove 411, while the axles on both sides of the adjusting roller 42 extend into the guide groove 412 and roll in a specific direction under the constraint of the guide groove 412. The bottom of the clamp 41 has a pressure bearing surface 413 opposite to the outer peripheral surface of the adjusting roller 42, and a pressure gap is formed between the pressure bearing surface 413 and the adjusting roller 42 for the flexible connecting branch pipe 3 to pass through.

[0047] Specifically, the guide groove 412 is inclined relative to the axis of the flexible connecting branch pipe 3, causing the distance between the outer circumferential surface of the adjusting roller 42 and the pressure bearing surface 413 at the bottom of the clamp 41 to change continuously as the adjusting roller 42 rolls along the guide groove 412. When the adjusting roller 42 is located at the end of the guide groove 412 away from the pressure bearing surface 413, the gap between the outer circumferential surface of the adjusting roller 42 and the pressure bearing surface 413 is at its maximum. At this time, the flexible connecting branch pipe 3 is basically not compressed, and its internal gas flow gap is close to its maximum value under natural conditions. As the adjusting roller 42 rolls along the guide groove 412 towards the pressure bearing surface 413, the gap between the outer circumferential surface of the adjusting roller 42 and the pressure bearing surface 413 gradually decreases, and the flexible connecting branch pipe 3 is gradually compressed and radially contracts, and its internal gas flow gap decreases accordingly. When the adjusting roller 42 reaches the end of the guide groove 412 closest to the pressure bearing surface 413, the gap width between the outer peripheral surface of the adjusting roller 42 and the pressure bearing surface 413 reaches the minimum value. At this time, the flexible connecting branch pipe 3 is completely flattened, the internal gas flow gap is reduced to zero or close to zero, and the gas flow is blocked.

[0048] In this embodiment, the extension direction of the guide groove 412 and the axis of the flexible connecting branch pipe 3 are set at an angle of 15° to 30°.

[0049] If the tilt angle of the guide groove 412 is too small, the change in the pressure gap is small as the adjusting roller 42 rolls from one end to the other. Even if the adjusting roller 42 rolls a long distance, the change in the radial pressure of the flexible connecting branch pipe 3 is relatively limited. Although this design can achieve more precise adjustment, it requires a longer guide groove 412 to achieve the complete adjustment range from fully open to fully closed, which in turn increases the overall size of the clamp 41, making it difficult to achieve miniaturization and weight reduction. Conversely, if the tilt angle is too large, for example, greater than 30°, the rate of change of the pressure gap with the rolling distance of the adjusting roller 42 is large, resulting in overly sensitive flow adjustment. Even a slight movement of the adjusting roller 42 by the operator can easily cause drastic changes in the gas flow, making it difficult to achieve fine adjustment. Especially in scenarios requiring a small flow output, excessive sensitivity makes it difficult for the operator to stabilize the flow near the desired value.

[0050] Therefore, in this embodiment, the angle between the extension direction of the guide groove 412 and the axis of the flexible connecting branch pipe 3 is limited to the range of 15° to 30°. This range achieves a better balance between adjustment sensitivity and adjustment stroke.

[0051] In a preferred embodiment, the angle between the extending direction of the guide groove 412 and the axis of the flexible connecting branch pipe 3 is 20°. At this angle, sin20° is approximately equal to 0.342, and the ratio of the movement distance of the roller center to the change in the pressure gap is approximately 1 / sin20° ≈ 2.92. When the adjusting roller 42 rolls from the fully open position to the fully closed position, the movement distance of the roller center is approximately 2.92 times the change in the pressure gap. This ratio allows medical personnel to comfortably push the adjusting roller 42 with their thumb to complete the entire adjustment process, while also enabling flow control through minute changes in the roller position.

[0052] In this embodiment, the diameter of the adjusting roller 42 is 8mm to 12mm. When the adjusting roller 42 moves along the extension direction of the guide groove 412 from one end of the guide groove 412 away from the pressure bearing surface 413 to one end of the guide groove 412 close to the pressure bearing surface 413, the gap width of the pressure gap decreases continuously from 3mm to 0mm.

[0053] In a preferred embodiment, the bottom of the clamp 41 has a pressure bearing surface 413 opposite to the outer peripheral surface of the adjusting roller 42. The pressure bearing surface 413 is an arc-shaped concave surface, and the radius of curvature of the arc-shaped concave surface is greater than or equal to the radius of the flexible connecting branch pipe 3. This design allows the arc-shaped concave surface to form a wrapping support on the lower side of the flexible connecting branch pipe 3 when it is pressed between the adjusting roller 42 and the pressure bearing surface 413, thus positioning the flexible connecting branch pipe 3 and preventing lateral displacement during the pressing process.

[0054] In this embodiment, in order to improve the operational reliability of the adjusting roller 42, a plurality of anti-slip teeth 421 are provided on the outer peripheral surface of the adjusting roller 42. The anti-slip teeth 421 are evenly distributed along the circumference of the adjusting roller 42, and the cross-sectional shape of the anti-slip teeth 421 can be triangular or trapezoidal.

[0055] The inventors considered that excessively high tooth height in the anti-slip serration 421 would cause a noticeable gritty feeling when pressing with the fingers, affecting operational comfort; conversely, insufficient tooth height would result in inadequate anti-slip performance, especially when medical personnel are wearing latex gloves, as the low coefficient of friction between the smooth latex surface and the smooth roller surface makes slippage more likely. Therefore, in this embodiment, the tooth height of the anti-slip serration 421 is 0.2mm~0.5mm, and the tooth pitch is 0.5mm~1.2mm. This parameter range ensures that the anti-slip serration 421 provides sufficient friction while improving operational comfort.

[0056] In this embodiment, limiting protrusions 415 are respectively provided at both ends of the guide groove 412. The limiting protrusions 415 are local structures that protrude from the bottom of the guide groove 412, and their height is less than or equal to half the depth of the guide groove 412. This design can physically limit the rolling stroke of the adjusting roller 42 and prevent the adjusting roller 42 from dislodging from the guide groove 412. When the axle of the adjusting roller 42 rolls to the end of the guide groove 412, the limiting protrusions 415 block the axle in the further movement path, forming a mechanical stop.

[0057] To facilitate adjustment of gas output flow by medical personnel, this embodiment provides a flow rate scale line 6 on the outer wall of the clamp 41. The flow rate scale line 6 is arranged along the extension direction of the guide groove 412 and corresponds to the rolling path of the adjusting roller 42. Specifically, the extension direction of the flow rate scale line 6 is parallel to the extension direction of the guide groove 412, and different points on the scale line correspond to different positions of the adjusting roller 42 in the guide groove 412.

[0058] The flow rate scale line 6 includes a first scale mark 61 corresponding to the fully open position, a second scale mark 62 corresponding to the fully closed position, and several intermediate scale lines 63 located between the first scale mark 61 and the second scale mark 62.

[0059] The flow opening scale line 6 can be formed using methods such as in-mold labeling, two-color injection molding, or laser marking. In-mold labeling produces the best wear resistance for the scale markings, making it suitable for distributors that require repeated use and cleaning. Laser marking is less expensive and suitable for single-use or limited-use products. Regardless of the process used, the contrast and clarity of the flow opening scale line 6 must ensure it is legible under illumination.

[0060] In summary, the Y-type medical gas shunt tube proposed in this invention includes a main pipe 1, a Y-type tee body 2, two flexible connecting branch pipes 3, and two roller-type adjustment mechanisms 4. The main pipe 1 is used to connect to a medical gas source terminal; the Y-type tee body 2 has one inlet end and two outlet ends, with the inlet end connected to the main pipe 1; the two flexible connecting branch pipes 3 are respectively connected to the two outlet ends; the two roller-type adjustment mechanisms 4 are respectively installed on the two flexible connecting branch pipes 3, and the roller-type adjustment mechanisms 4 are configured to adjust the gas flow gap inside the flexible connecting branch pipe 3 by changing the radial pressure of the flexible connecting branch pipe 3. With this design, each roller adjustment mechanism can independently change the radial compression degree of the corresponding flexible connecting branch pipe 3, thereby continuously adjusting the internal gas flow gap. Compared with the simple Y-type connector that can only achieve a fixed proportion of flow splitting, the Y-type medical gas shunt tube provided in this application allows for arbitrary opening degree adjustment of each output gas from fully closed to fully open. In addition, it eliminates the need for complex connecting parts and sealing structures required by multiple independent valves (such as needle valves and ball valves), making the overall size of the Y-type medical gas shunt tube small and the weight light, making it easy to store and carry.

[0061] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A Y-shaped medical gas shunt tube, characterized in that, include: The main pipe is used to connect to the medical gas supply terminal; The Y-shaped three-way pipe body has one air inlet end and two air outlet ends, and the air inlet end is connected to the main pipe; Two flexible connecting branch pipes are respectively connected to the two air outlets; Two roller-type adjustment mechanisms are respectively installed on the two flexible connecting branch pipes. The roller-type adjustment mechanisms are configured to adjust the gas flow gap inside the flexible connecting branch pipe by changing the radial pressure of the flexible connecting branch pipe.

2. The Y-type medical gas shunt tube according to claim 1, characterized in that, The roller-type adjustment mechanism includes: A clamp is connected to the flexible connecting branch pipe. The clamp is provided with a receiving groove and a guide groove. The guide groove is located on both side walls of the clamp and is connected to the receiving groove. The extension direction of the guide groove is set at an angle of 15° to 30° with the axis of the flexible connecting branch pipe. An adjusting roller is installed in the receiving groove, and the adjusting roller can roll in the receiving groove along the extension direction of the guide groove; The bottom of the clamp has a pressure bearing surface opposite to the outer peripheral surface of the adjusting roller, and a pressure gap is formed between the pressure bearing surface and the adjusting roller for the flexible connecting branch pipe to pass through.

3. The Y-type medical gas shunt tube according to claim 2, characterized in that, The angle between the extension direction of the guide groove and the axis of the flexible connecting branch pipe is 20°. The diameter of the adjusting roller is 8mm~12mm. When the adjusting roller moves along the extension direction of the guide groove from one end of the guide groove away from the pressure bearing surface to one end of the guide groove close to the pressure bearing surface, the gap width of the pressure gap continuously decreases from 3mm to 0mm.

4. The Y-type medical gas shunt tube according to claim 3, characterized in that, The clamp and the flexible connecting branch pipe are made into an integral component by an integral molding process. The clamp extends outward from the outer wall of the flexible connecting branch pipe, and one end of the flexible connecting branch pipe is fixedly bonded to the Y-shaped tee pipe body by hot melt adhesive.

5. The Y-type medical gas shunt tube according to claim 4, characterized in that, The clamp and the flexible connecting branch pipe are separate structures. The clamp is provided with an elastic fastener, and the outer wall of the flexible connecting branch pipe is provided with an annular groove. At least a portion of the elastic fastener is embedded in the annular groove.

6. The Y-type medical gas shunt tube according to claim 5, characterized in that, The outer circumferential surface of the adjusting roller is provided with multiple anti-slip teeth, and the cross-section of the anti-slip teeth is triangular or trapezoidal.

7. The Y-type medical gas shunt tube according to claim 6, characterized in that, Limiting protrusions are provided at both ends of the guide groove, and the height of the limiting protrusions is less than or equal to half the depth of the guide groove.

8. The Y-type medical gas shunt tube according to claim 7, characterized in that, The pressure bearing surface is an arc-shaped concave surface, and the radius of curvature of the arc-shaped concave surface is greater than or equal to the radius of the flexible connecting branch pipe.

9. The Y-type medical gas shunt tube according to claim 8, characterized in that, The outer surface of the Y-shaped three-way pipe is provided with a gas flow direction arrow mark, the arrows of the gas flow direction arrow mark point to the two gas outlet ends respectively, and the outer side wall of the clamp is provided with a flow opening scale line, the flow opening scale line is arranged along the extension direction of the guide groove. The flow rate scale line includes a first scale mark corresponding to the fully open position, a second scale mark corresponding to the fully closed position, and several intermediate scale lines located between the first scale mark and the second scale mark.

10. The Y-type medical gas shunt tube according to claim 9, characterized in that, The included angle between the two flexible connecting branches is 45°~90°.

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