Laser-welded medical transmission pipelines without adhesives or solvents

Abstract

To provide a laser-welded medical transmission pipeline that does not require adhesives or solvents, which eliminates the need for drying and hardening time, shortens product manufacturing time, improves product production capacity, reduces manual operations, enables automated production, has the advantages of increased strength at the welded joint, is aesthetically pleasing, and has the advantages of being sealed, airtight, and watertight, and further strengthens the bond between the two, meeting the sealing and tensile strength requirements of the transmission pipeline and fittings. [Solution] A laser-welded medical transmission pipeline that does not use adhesives or solvents includes a fitting (10) and a transmission pipe (20). The fitting includes a fixedly connected fitting body (11) and fitting connection portion (12). An engaging portion (13) is provided on the outer wall of the fitting connection portion near one end of the fitting body. The transmission pipe includes a fixedly connected transmission pipe body (21) and transmission pipe connection portion (22). An engaging device (23) is provided on the inner wall of the transmission pipe connection portion away from the one end of the transmission pipe body. The transmission pipe connection portion is fitted onto the outside of the fitting connection portion, and the engaging device and the engaging portion are engaged and connected, so that the inner wall of the transmission pipe connection portion and the outer wall of the fitting connection portion are in close contact with each other, achieving a sealed assembly through laser welding.

Description

[Technical Field]

[0001] FIELD OF THE INVENTION The present invention relates to the medical device arts, and more particularly to adhesive- and solvent-free laser-welded medical transmission lines. [Background technology]

[0002] Transmission pipe joint assemblies are used to connect with medical equipment. In the traditional assembly process of medical transmission pipes and joints, adhesives (such as UV adhesives and quick-drying adhesives) are generally used to connect them. However, the adhesive curing process used still leaves VOCs volatilizing after assembly, posing a risk to safety. At the same time, the adhesive curing process requires a certain amount of time for drying and curing, which is unfavorable for rapid production. Summary of the Invention

[0003] The purpose of the present invention is to provide a laser-welded medical transmission pipeline that does not use adhesives or solvents, which solves the technical problems of the long drying time and volatilization of VOC substances that occur when medical transmission pipelines and fittings in the prior art use adhesives.

[0004] To achieve the above objectives, the present invention adopts the following technical solutions:

[0005] The present invention provides adhesive- and solvent-free laser-welded medical transmission pipelines, a joint including a joint body and a joint connection portion that are fixedly connected, and an engaging portion provided on an outer wall of the joint connection portion near one end of the joint body; a transmission pipe including a transmission pipe body and a transmission pipe connection part fixedly connected to each other, and an engaging device provided on an inner wall of the transmission pipe connection part away from one end of the transmission pipe body; The transmission pipe connection portion is fitted onto the outside of the joint connection portion, and the engaging member and the engaging portion are engaged and connected, and the inner wall of the transmission pipe connection portion and the outer wall of the joint connection portion are in close contact with each other, achieving a sealed assembly through laser welding.

[0006] In the above-mentioned adhesive- and solvent-free laser-welded medical transmission pipeline, the engagement portion is a groove portion provided in an annular shape on the outer wall of the joint connection portion, The engaging device is an annular protrusion formed by bending the transmission pipe connecting portion inward, and corresponding to this, the outer wall of the transmission pipe connecting portion forms a corresponding recess, and the cross section of the annular protrusion is wedge-shaped.

[0007] According to the above-mentioned adhesive- and solvent-free laser-welded medical transmission pipeline, the end of the transmission pipe connecting portion remote from one end of the transmission pipe body and the engaging member are both provided within the engaging portion.

[0008] According to the above-described adhesive- and solvent-free laser-welded medical transmission pipeline, a guide portion is provided at one end of the joint connection portion remote from the joint body.

[0009] According to the above adhesive- and solvent-free laser-welded medical transmission pipeline, a plurality of anti-slip strips are provided on the outer wall of the joint body.

[0010] According to the adhesive and solvent free laser welded medical transmission line described above, the transmission line connection is a transparent or translucent plastic part.

[0011] According to the above adhesive and solvent free laser welded medical transmission pipeline, the fitting connection is a translucent or opaque plastic part.

[0012] According to the adhesive-free and solvent-free laser-welded medical transmission pipeline, the wall thickness of the transmission pipe joint is 4 mm or less.

[0013] According to the above-mentioned adhesive- and solvent-free laser-welded medical transmission pipeline, the wavelength of the laser light source for the laser welding is 800 nm to 1000 nm.

[0014] According to the above adhesive and solvent free laser welding medical transmission pipeline, the laser welding adopts a 808nm laser light source, or the laser welding adopts a 980nm laser light source.

[0015] The adhesive-free and solvent-free laser-welded medical transmission lines provided by the present invention have at least the following beneficial effects:

[0016] The adhesive- and solvent-free laser-welded medical transmission pipeline provided by this invention employs a combination of connectors and connectors. By using laser welding, it replaces the traditional adhesive curing process, avoids the volatilization of VOC substances caused by the adhesive, and improves the safety of medical devices. Laser welding eliminates the need for drying and hardening time, shortens product manufacturing time, improves product production capacity, reduces manual operation, and enables automated production. Laser welding has the advantages of increased strength at the weld, making it aesthetically pleasing, and providing sealing, no air leaks, and no water leaks. It also strengthens the connection between the two, meeting the sealing and tensile strength requirements of the transmission pipeline and connector. [Brief explanation of the drawings]

[0017] In order to more clearly explain the technical solutions in the embodiments of the present invention, the following will briefly describe the accompanying drawings that need to be used in the description of the embodiments or prior art. Obviously, the accompanying drawings described below are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these accompanying drawings without any creative work. [Figure 1] 1 is a schematic diagram of the three-dimensional structure of a laser-welded medical transmission pipeline provided by the present invention, which does not use adhesives or solvents. [Figure 2] 1 is an exploded partial structural schematic diagram of the adhesive- and solvent-free laser-welded medical transmission pipeline provided by the present invention; [Figure 3] 1 is a schematic cross-sectional view of the partial structure of a laser-welded medical transmission pipeline provided by the present invention, which does not use adhesives or solvents. DETAILED DESCRIPTION OF THE INVENTION

[0018] In order to make the technical problems, technical solutions and beneficial effects of the present invention clearer, the present invention will be described in more detail below with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are only used to interpret the present invention and are not intended to limit the present invention.

[0019] When an element is "fixed" or "mounted" on another element, it may be located directly or indirectly on the other element. When an element is "connected" to another element, it may be connected directly or indirectly to the other element. The orientations or positions indicated by terms such as "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are based on the accompanying drawings and are used for illustrative purposes only and are not intended to limit the technical solution. The terms "first" and "second" are used for illustrative purposes only and do not indicate or imply the relative importance or number of technical features. The term "plurality" means two or more than two, unless otherwise specified.

[0020] Referring to FIG. 1, this embodiment provides a laser-welded medical transmission pipeline 100 that does not use adhesives or solvents and is used for connection to medical equipment. The pipeline includes a coupling 10 and a transmission pipe 20. Referring to FIGS. 2 and 3, the coupling 10 includes a fixedly connected coupling body 11 and a coupling connection portion 12. The coupling connection portion 12 has an engaging portion 13 on an outer wall thereof near one end of the coupling body 11. The transmission pipe 20 includes a fixedly connected transmission pipe body 21 and a transmission pipe connection portion 22. The engaging portion 23 is on an inner wall thereof away from the one end of the transmission pipe body 21. The transmission pipe connection portion 22 is fitted onto the outside of the coupling connection portion 12, and the engaging portion 13 engages with the engaging portion 13 to connect the inner wall of the transmission pipe connection portion 22 and the outer wall of the coupling connection portion 12, resulting in close contact between the inner wall of the transmission pipe connection portion 22 and the outer wall of the coupling connection portion 12, achieving a sealed assembly through laser welding. Optionally, the laser welding can be a full-circle welding. Optionally, the laser welding can be at least a two-circumference weld, including at least a first weld 30a and a second weld 30b, which can make the hermetic connection more reliable.

[0021] The transmission pipe connection part 22 is fitted onto the outside of the joint connection part 12, and the engaging part 23 and the engaging part 13 combine to provide a fastening force that prevents the two from loosening, thereby meeting the tensile strength requirements of the transmission pipe 20 and the joint 10. Then, a laser is used to perform laser welding on the close contact areas of the inner wall of the transmission pipe connection part 22 and the outer wall of the joint connection part 12, so that the inner wall of the transmission pipe connection part 22 and the outer wall of the joint connection part 12 are in close contact with each other, thereby effectively ensuring energy transmission between the components. In this embodiment, the combination of the engaging element 23 and the engaging part 13 is adopted, and laser welding is used to replace the traditional adhesive curing process, avoiding the volatilization of VOC substances caused by the adhesive and improving the safety of medical equipment use. Laser welding eliminates the need for drying and hardening time, shortening the manufacturing time, improving product production capacity, reducing manual operation and enabling automated production. Laser welding has the advantages of increased strength at the weld, a beautiful appearance, and sealing, no air leakage and no water leakage, strengthening the connection between the two and meeting the sealing and tensile strength requirements of the transmission pipe 20 and the coupling 10.

[0022] 2 and 3, in one embodiment, the engaging portion 13 is a groove formed in an annular shape on the outer wall of the coupling connection portion 12, and the engaging device 23 is an annular protrusion formed by bending the transmission pipe connection portion 22 inward. Correspondingly, the outer wall of the transmission pipe connection portion 22 forms a corresponding recess 24, which simplifies the manufacturing process of the engaging device 23, and the cross section of the annular protrusion is wedge-shaped, which makes it easy to quickly install the engaging device 23 into the engaging portion 13 and also makes disassembly very easy and labor-saving.

[0023] In one embodiment, referring to Figures 2 and 3, the end of the transmission pipe connecting portion 22 remote from one end of the transmission pipe main body 21 and the engaging member 23 are both provided within the engaging portion 13, and after the engaging member 23 and the engaging portion 13 are engaged and connected, the structure of the connection between the transmission pipe connecting portion 22 and the coupling connecting portion 12 is complete and aesthetically pleasing.

[0024] In one embodiment, a guide portion 14 is provided at one end of the fitting connection portion 12 remote from the fitting body 11. The provision of the guide portion 14 facilitates quick and accurate insertion of the fitting connection portion 12 into the transmission pipe connection portion 22.

[0025] In one embodiment, the pipe wall thickness of the transmission pipe connection part 22 is 4 mm or less, and the pipe wall thickness of the fitting connection part 12 is not limited.

[0026] Alternatively, the pipe wall thickness of the transmission pipe connection portion 22 is 4 mm. Alternatively, the pipe wall thickness of the transmission pipe connection portion 22 is 3 mm. Alternatively, the pipe wall thickness of the transmission pipe connection portion 22 is 2 mm. It should be understood that the pipe wall thickness of the transmission pipe connection portion 22 is not limited to the above cases and may be other cases, and is not limited here.

[0027] 2, in one embodiment, a plurality of anti-slip strips 15 are provided on the outer wall of the joint body 11. The provision of the anti-slip strips 15 increases the frictional force when gripping the joint 10, further improving the gripping stability of the joint 10.

[0028] In one embodiment, the laser welding has a laser light source wavelength of 800 nm to 1000 nm, an output of 100 W, and time is instantaneous. Optionally, the laser welding uses an 808 nm laser light source. Optionally, the laser welding uses a 980 nm laser light source.

[0029] In one embodiment, the transmission pipe connection 22 is a transparent or translucent plastic part, and the fitting connection 12 is a translucent or opaque plastic part.

[0030] Since the transmission pipe connection part 22 is fitted onto the outside of the joint connection part 12, the transmission pipe connection part 22 is located on the surface layer, and by making the surface transmission pipe connection part 22 a transparent or semi-transparent plastic part, the laser beam can easily penetrate to the welded layer. Correspondingly, the joint connection part 12 is located inside the transmission pipe connection part 22, i.e., the joint connection part 12 is located on the inner layer, and the inner layer joint connection part 12 is made of a semi-transparent or opaque plastic part, which absorbs the laser energy and then converts it into heat energy, making it easier to melt the molded parts and bond them together.

[0031] The laser penetrates the transparent or translucent outer layer transmission pipe connection part 22 and reaches the weld layer between the transmission pipe connection part 22 and the joint connection part 12. The inner layer translucent or opaque joint connection part 12 absorbs the energy and then converts it into thermal energy, which plasticizes the polymer through the component through sufficient volume absorption heating, welding and bonding the outer wall of the joint connection part 12 and the inner wall of the transmission pipe connection part 22, which are in close contact with each other, and welding the outer wall of the joint connection part 12 and the inner wall of the transmission pipe connection part 22 all around, thereby completing a sealed assembly.

[0032] Optionally, the material of the transmission pipe connection 22 is the same as the material of the fitting connection 12. Optionally, the material of the transmission pipe connection 22 is different from the material of the fitting connection 12, and when the materials are different, the superimposed melting temperatures of the two materials must be taken into consideration.

[0033] Optionally, the material of the fitting connection part 12 is PC or PE or ABS or PPUS or PET or PMMA or PCTG or POM or PA6 or PA66 or PA or PP or Silicon or PVC or PS or HDPE or LDPE or K-Resin or PETG or TPE or LLDPE or HIPS or PBT or PA+GF30% or PP+GF30% or POM+GF30% or ABS+GF30% or PC+GF30%.

[0034] The above are only preferred embodiments of the present invention, and do not limit the present invention. Any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and principles of the present invention shall all fall within the protection scope of the present invention. [Explanation of symbols]

[0035] 100 Laser-welded medical transmission pipelines without adhesives or solvents 10 Joints 11 Joint body 12 Fitting connection 13 Engagement portion 14 Information Department 15 Anti-slip strips 20 Transmission Pipe 21 Transmission pipe body 22 Transmission pipe connection 23 Engagement tool 24 recess 30a First weld 30b Second weld

Claims

1. 1. An adhesive and solvent free laser welded medical transmission pipeline comprising: a joint including a joint body and a joint connection portion that are fixedly connected, and an engagement portion provided on an outer wall of the joint connection portion near one end of the joint body; a transmission pipe including a transmission pipe body and a transmission pipe connection part fixedly connected to each other, and an engaging device provided on an inner wall of the transmission pipe connection part away from one end of the transmission pipe body, The transmission pipe connecting portion is fitted onto the outside of the joint connecting portion, and the engaging member and the engaging portion are engaged and connected, and the inner wall of the transmission pipe connecting portion and the outer wall of the joint connecting portion are in close contact with each other, thereby achieving a sealed assembly through laser welding.

2. the engaging portion is a groove portion provided in an annular shape on an outer wall of the joint connection portion, 2. The laser-welded medical transmission pipeline according to claim 1, wherein the engaging member is an annular protrusion formed by bending the transmission pipe connection portion inward, and the outer wall of the transmission pipe connection portion forms a corresponding recess, and the cross section of the annular protrusion is wedge-shaped.

3. 2. The adhesive- and solvent-free laser-welded medical transmission pipeline of claim 1, wherein the end of the transmission tube connection portion remote from one end of the transmission tube body and the engaging device are both provided within the engaging portion.

4. 2. The adhesive- and solvent-free laser-welded medical transmission pipeline of claim 1, wherein a guide portion is provided at one end of the fitting connection portion remote from the fitting body.

5. 10. The adhesive- and solvent-free laser-welded medical transmission pipeline of claim 1, wherein the outer wall of the coupling body is provided with a plurality of anti-slip strips.

6. 10. The adhesive-free and solvent-free laser-welded medical transmission line of claim 1, wherein the transmission line connection is a transparent or translucent plastic part.

7. 7. The adhesive and solvent free laser welded medical transmission pipeline of claim 6, wherein the fitting connection is a translucent or opaque plastic part.

8. 2. The adhesive- and solvent-free laser-welded medical transmission pipeline of claim 1, wherein the wall thickness of the transmission pipeline connection is 4 mm or less.

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