A method for limiting the number of cavities in a minimal pipeline and a cavity-splitting component using this method

Abstract

This invention discloses a method for extreme cavity connection of extremely small pipelines and a cavity-splitting component using this method. The specific steps include: opening multiple holes in a multi-cavity pipe, wherein the multi-cavity pipe has multiple holes equidistant along the axial direction and rotated radially, and the holes are connected to branch channels within the multi-cavity pipe; sealing the end faces of the multi-cavity pipe, sealing the end faces of the branch pipes connected to each of the holes; isolating adjacent holes from step S1; after completing step S3, inserting an outer pipe into the multi-cavity pipe and inserting a liner rod inside the multi-cavity pipe, sealing the end faces of the outer pipe and the multi-cavity pipe, removing the liner rod after sealing; and isolating and sealing. This invention, through the assembly and cooperation of multiple parts, can achieve extreme cavity splitting in extremely small dimensions, while having low manufacturing difficulty, low cost, and guaranteed quality, making it suitable for mass production and application, thus solving the problem of existing technologies being unable to perform cavity splitting on extremely small main pipes.

Description

Technical Field

[0001] This invention relates to the technical field of medical devices, and in particular to a method for connecting extremely small tubing with limited cavity division and a cavity division component using this method. Background Technology

[0002] In the field of medical devices, the use of integrated, compartmentalized components and adhesive bonding for sealing allows for compartmentalized connections, enabling isolation of each tubing and supporting multi-tubing applications. This allows for time-based and volume-controlled dispensing of different tubing lines to address drug compatibility issues. However, existing tubing connection methods, such as single-channel multi-channel or parallel multi-channel systems, are relatively easy to implement when the tubing diameter is large. But when the tubing size is small, regardless of the material, engineering implementation becomes challenging, hindering efficient automated production, resulting in high costs and limiting mass production and widespread adoption.

[0003] When using a one-piece molding method, the mold process dimensions may exceed the structural limits of engineering applications such as injection molds due to the extremely small diameter of the pipes and the large number of cavities. This can easily lead to injection defects, low yield, short mold life, and high manufacturing costs. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a method for connecting extremely small pipelines with limited cavity division and a cavity division component using this method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a method for connecting extremely small pipelines with limited cavity division, the specific steps of which include: S1, Multi-cavity tube opening, the multi-cavity tube is provided with multiple openings at equal intervals along the axial direction and rotating in the radial direction, the openings are connected to the branch channels inside the multi-cavity tube; S2, Multi-cavity pipe end face sealing, sealing the end face of each branch pipe connected to the opening; S3, disconnect the adjacent openings in step S1; S4, after completing step S3, insert the outer tube into the multi-cavity tube and insert a liner rod into the multi-cavity tube to seal the end face of the outer tube and the multi-cavity tube. After sealing, remove the liner rod. S5, partition seal.

[0006] As a further description of the above technical solution, in step S1, the openings are spirally distributed along the outer surface of the multi-cavity tube, and the axial spacing between adjacent openings is equal.

[0007] As a further description of the above technical solution, the size of the opening is 0.5mm-3mm, and the axial spacing of the opening is 2mm-5mm.

[0008] As a further description of the above technical solution, in step S3, a first partition liner and a second partition liner with openings are arranged at equal intervals in sequence, wherein the opening of the second partition liner is aligned with the opening on the multi-cavity tube, and the first partition liner is arranged between adjacent openings.

[0009] As a further description of the above technical solution, the cross-sections of the first partition liner and the second partition liner are circular, and the lengths of the second partition liner and the first partition liner are 3mm-6mm.

[0010] As a further description of the above technical solution, the first partition liner and the second partition liner are formed by extrusion molding followed by cutting or by injection molding.

[0011] As a further description of the above technical solution, in step S4, the outer tube includes a main channel, and multiple sub-channels are opened on the main channel.

[0012] As a further description of the above technical solution, the angle between the sub-channel outlet axis and the main channel axis is within ±45°.

[0013] As a further description of the above technical solution, an injection port is provided between adjacent sub-channels. The injection port is oblong in shape and has a width of 0.5mm-2mm.

[0014] A cavity-splitting component using the above-described limit cavity connection method includes: A multi-cavity tube, wherein the outer surface of the multi-cavity tube is provided with a plurality of openings, each of the openings being connected to a corresponding flow channel within the sub-cavity tube; The first partition liner and the second partition liner are alternately arranged on the outside of the multi-cavity tube, and the second partition liner has an opening that matches the opening on the multi-cavity tube. An outer tube is disposed outside the first partition liner and the second partition liner, and the outer tube has multiple sub-channels corresponding to the openings.

[0015] The present invention has the following beneficial effects: 1. This invention achieves extreme pipe division in extremely small sizes through the assembly and cooperation of multiple parts. At the same time, it is easy to manufacture, low in cost, and can guarantee quality, making it suitable for mass production and application, thus solving the problem that existing technologies cannot perform chamber division on extremely small main pipes. Attached Figure Description

[0016] Figure 1 This is a flowchart of the method for limiting cavity division in minimal pipelines proposed in this invention; Figure 2This is a flowchart of the limit cavity splitting method in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram showing that the surface of the multi-lumen tube proposed in this invention has openings; Figure 4 This is a schematic diagram illustrating the sealing of the end face of a multi-cavity tube as proposed in this invention; Figure 5 This is a schematic diagram of the first partition liner proposed in this invention; Figure 6 This is a schematic diagram of various second partition liner tubes proposed in this invention; Figure 7 This is a schematic diagram of the cooperation between the multi-lumen tube and the partition liner proposed in this invention; Figure 8 This is a schematic diagram illustrating the sealing of the multi-lumen tube and the outer tube proposed in this invention; Figure 9 This is a schematic diagram of the outer tube proposed in this invention; Figure 10 This is a cross-sectional view of the outer tube proposed in this invention; Figure 11 This is a schematic diagram of the partition after sealing proposed in this invention; Figure 12 This is a schematic diagram of a cavity component manufactured using the limit cavity method of the present invention.

[0017] Legend: 1. Multi-cavity tube; 2. Diversion channel; 3. Opening; 4. First partition liner; 5. Second partition liner; 6. Outer tube; 7. Injection port; 8. Liner rod. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] This application provides a method for connecting extremely small pipelines with limited cavities, solving the problem that conventional methods in the prior art, when the diameter of a single pipeline is less than 1 mm or smaller, or when the maximum diameter of the main pipe is less than 2 mm but the number of pipelines is more than 3, face challenges in terms of equipment size and operational methods, making engineering implementation difficult and hindering efficient production. The technical concept of this application involves opening holes 3 in a multi-cavity pipe 1, with each opening 3 only connected to a corresponding cavity of the multi-cavity pipe 1. The end face of each cavity is then sealed. A partition liner is used to separate the multi-cavity pipe 1 according to the opening 3. The partition liner at the position corresponding to the opening 3 also has an opening 3, aligned with the opening 3 on the corresponding cavity pipe, so that the position of the opening 3 can serve as a branch channel 2. After sealing with the partition liner, an outer pipe 6 is installed on the outside of the finished product. Then, glue is injected to seal between each branch channel, followed by a sealing test to check for leaks. Based on the above technical concept, lumens can be created on micro-catheters by assembling multiple parts, which is low-cost and ensures quality.

[0020] For details, please refer to Figure 1-12 This invention provides an embodiment of a method for connecting extremely small pipelines with multiple cavities. In this embodiment, the diameter of the multi-cavity pipe 1 is 1 mm, and a total of 10 cavities are provided inside the multi-cavity pipe 1. Specific steps include: S1, the multi-lumen tube 1 has openings 3. The multi-lumen tube 1 has openings 3 spaced equidistantly along the axial direction and rotates radially, with the openings shifting axially. Preferably, the openings 3 can be spirally distributed on the circumferential surface of the multi-lumen tube 1, as shown in the reference. Figure 3 This ensures that each cavity is connected to only one opening 3. Furthermore, the shape of the opening 3 can be a closed curve shape with a certain cross-sectional area, such as a circle, ellipse, rectangle, waist shape, or polygon.

[0021] As for the size of the opening 3, the size of the opening 3 is preferably 0.5mm to 3mm, and the axial spacing of the opening 3 is preferably 2mm-5mm. The appropriate size can be selected according to the length of the overall structure and the processing technology of each component.

[0022] S2, sealing the end face of the multi-cavity tube 1: Use UV adhesive or other methods to seal the end face of the cavity channel corresponding to the opening 3 in step S1. (Refer to...) Figure 4 The sealing depth is 0.5mm-5mm. A longer sealing depth can be used as needed, as long as the sealing depth does not exceed the first partition section, to avoid preventing the cavity from being unable to flow outward.

[0023] S3, refer to Figure 7In step S1, adjacent openings 3 are separated. In this embodiment, the separation method preferably involves sequentially assembling a first separation liner 4 and a second separation liner 5 with openings 3 at equal intervals. When installing the second separation liner 5, the openings 3 of the second separation liner 5 need to correspond to the openings 3 on the multi-cavity tube 1, and a separation seal is performed. This separation seal can be achieved by directly separating and sealing with a low-flow adhesive. In this step, the shapes of the first partition liner 4 and the second partition liner 5 can be referred to Figure 5 and Figure 6 The cross-sectional shape of the first partition liner 4 and the second partition liner 5 is preferably annular. In other preferred embodiments, they can also be rectangular or elliptical, etc., as long as they match the shape of the multi-cavity tube 1. The opening 3 on the second partition liner 5 can be circular, elliptical, waist-shaped, rectangular, rectangular with rounded corners, or parallel through-holes. The parallel through-hole shape is preferred. The size of the opening 3 matches the size of the opening 3 on the multi-cavity tube 1, and preferably is larger than the size of the opening 3 on the outside of the multi-cavity tube 1. The length of the first partition liner 4 and the second partition liner 5 matches the spacing of the openings 3 on the multi-cavity tube 1, preferably 3mm-6mm.

[0024] Regarding the manufacturing and forming of the first partition liner 4 and the second partition liner 5, the first partition liner 4 can be formed by cutting an extruder or by directly injecting glue to form a partition shape. The second partition liner 5 can be formed by cutting an extruder and then opening a hole 3. If glue is injected directly into the glue injection port 7 of the outer tube 6 for partitioning, the second partition liner 5 will be a cavity.

[0025] S4, Reference Figure 8 Install the outer tube 6 and seal its end face. Insert the finished product from step S3 into the outer tube 6, and insert a liner rod into the center of the multi-cavity tube 1 to prevent blockage of the central tube of the multi-cavity tube 1. Seal the tube with glue through the glue injection port 7 to seal the end face of the outer tube 6 to the multi-cavity tube 1. After sealing, remove the liner rod to keep the central tube unobstructed.

[0026] For the shape of outer tube 6, please refer to Figures 9-10 The outer tube 6 comprises a main channel and multiple sub-channels, determined by the number of cavities. The main channel and sub-channels preferably have a circular cross-sectional shape, but can also be rectangular, elliptical, oblong, polygonal, or other closed cross-sectional shapes. The angle between the outlet axis of the sub-channel and the axis of the main channel is preferably within ±45 degrees. The multiple evenly distributed injection ports 7 on the outer tube 6 are preferably oblong, with a width of 0.5mm to 2mm, and their maximum length should be greater than the diameter of the partition liner. Their cross-sectional shape can be rectangular, elliptical, or other closed polygons.

[0027] The outer tube 6 is preferably made of polycarbonate (PC) or polymethyl methacrylate (PMMA), with high transparency. PS, PET, PETG, transparent ABS, and transparent PP can also be used to facilitate quick sealing and fixation with UV adhesive. Other non-transparent polymer materials can also be selected and sealed with epoxy resin.

[0028] S5, Reference 11, Partition sealing, glue is injected into the outer tube 6 through multiple glue injection ports 7 to seal the partition. Preferably, UV glue can be used for sealing. S6, conduct a sealing test.

[0029] The above method can be used to obtain the following: Figure 12 Products.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for connecting the limit of a micro-pipeline with a micro-chamber, characterized in that, The specific steps include: S1, Multi-cavity tube opening, the multi-cavity tube is provided with multiple openings at equal intervals along the axial direction and rotating in the radial direction, the openings are connected to the branch channels inside the multi-cavity tube; S2, Multi-cavity pipe end face sealing, sealing the end face of each branch pipe connected to the opening; S3, the adjacent openings in step S1 are separated; a first partition liner and a second partition liner with openings are arranged at equal intervals in sequence, wherein the opening of the second partition liner is aligned with the opening on the multi-cavity tube, and the first partition liner is arranged between adjacent openings. S4, after completing step S3, insert the outer tube into the multi-cavity tube and insert a liner rod into the multi-cavity tube to seal the end face of the outer tube and the multi-cavity tube. After sealing, remove the liner rod. S5, partition seal.

2. The method of claim 1, wherein, In step S1, the openings are spirally distributed along the outer surface of the multi-cavity tube, and the axial spacing between adjacent openings is equal.

3. The method of claim 1, wherein the method is a method of connecting a limit chamber of a pipe having a small diameter. The size of the opening is 0.5mm-3mm, and the axial spacing of the opening is 2mm-5mm.

4. The method of claim 1, wherein, The cross-sections of the first partition liner and the second partition liner are circular, and the lengths of the second partition liner and the first partition liner are 3mm-6mm.

5. The method of claim 1, wherein, The first partition liner and the second partition liner are formed by extrusion molding followed by cutting or by injection molding.

6. The method of claim 1, wherein, In step S4, the outer tube includes a main channel, and multiple sub-channels are provided on the main channel.

7. The method of claim 6, wherein the method is a method of connecting a limit chamber of a pipe having a small diameter. The angle between the outlet axis of the sub-channel and the axis of the main channel is within ±45°.

8. The method of claim 6, wherein the method is a method of connecting a limit chamber of a pipe, and the method comprises: An injection port is provided between adjacent channels. The injection port is oblong in shape and has a width of 0.5mm-2mm.

9. A cavity-splitting component employing the limit cavity-splitting connection method as described in any one of claims 1-8, characterized in that, include: A multi-cavity tube, wherein a plurality of openings are formed on the outer surface of the multi-cavity tube, and each opening is connected to a corresponding flow channel inside the multi-cavity tube; The first partition liner and the second partition liner are alternately arranged on the outside of the multi-cavity tube, and the second partition liner has an opening that matches the opening on the multi-cavity tube. An outer tube is disposed outside the first partition liner and the second partition liner, and the outer tube has multiple sub-channels corresponding to the openings.

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