CN210600627U - Connecting structure of plastic corrugated pipe and plastic connector - Google Patents
Connecting structure of plastic corrugated pipe and plastic connector Download PDFInfo
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- CN210600627U CN210600627U CN201921510365.3U CN201921510365U CN210600627U CN 210600627 U CN210600627 U CN 210600627U CN 201921510365 U CN201921510365 U CN 201921510365U CN 210600627 U CN210600627 U CN 210600627U
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- plastic joint
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Abstract
The utility model discloses a connection structure of plastic bellow and plastic joint, by plastic bellow's one end is pegged graft in the plastic joint and is connected the formation through interference fit with the plastic joint, it is sealed fixed through the laser welding between plastic bellow's crest and the plastic joint. Implement the utility model discloses a connection structure between plastic corrugated pipe and the plastic joint, its performance can reach hookup location under 0.5MPa environment through sealed test and do not have the leakage, through the laser welding between plastic pipe spare and the plastic joint, has improved connection structure's pliability, can weld plastic corrugated pipe's a plurality of wave peak positions, and the leakproofness effectively promotes, and connection structure's intensity is higher than the intensity of body itself.
Description
Technical Field
The invention relates to the technical field of automobile pipeline connection, in particular to a connecting structure of a plastic corrugated pipe and a plastic joint.
Background
At present, the normal circulation of fluid is ensured at a plurality of positions of the whole vehicle through pipelines so as to meet the working requirement of a system. The traditional technical means is to adopt an EPDM rubber hose and connect the rubber hose by a worm wheel and a worm rod hoop. However, the rubber hose has a great difference from a plastic corrugated pipe in terms of high temperature resistance, aging resistance, environmental protection, weight reduction and smooth inner wall, so that the plastic corrugated pipe is gradually adopted to replace the rubber hose, as shown in fig. 1, the plastic corrugated pipe 1 needs to connect the joint 2 with the straight line section a of the corrugated pipe 1 through interference fit, so that the straight line sections a at two ends of the plastic corrugated pipe 1 need to be ensured during blanking, and the corrugated section needs to be removed, which causes great waste. In addition, the pipe section of the corrugated pipe can be formed by arranging and connecting the straight line section A and the corrugated section B according to a certain rule, however, the defect of the connection mode limits the designed length, and the length is the sum of the length of the corrugated section B and the length of one straight line section A. And because of the existence of the straight line segment A, the flexibility of the pipe body is poor, in order to meet the requirement of producing an assembly with any length, the pipe body needs to adopt a full-corrugated form, and the performance requirement of the full-plastic corrugated pipe and the plastic joint can not be met by the existing connection mode.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a connecting structure of a plastic corrugated pipe and a plastic joint.
The technical effect to be achieved by the invention is realized by the following scheme: a connecting structure of a plastic corrugated pipe and a plastic joint is formed by inserting one end of the plastic corrugated pipe into the plastic joint and connecting the plastic corrugated pipe and the plastic joint in an interference fit mode, and a wave crest of the plastic corrugated pipe and the plastic joint are hermetically fixed through laser welding.
Preferably, when the plastic corrugated pipe and the plastic joint are welded, a fixing clip is further arranged at a position where the plastic corrugated pipe and the plastic joint are connected, and the fixing clip is used for clamping and fixing the plastic corrugated pipe and the plastic joint.
Preferably, the plastic bellows is an all-plastic bellows assembly of any length.
Preferably, the wave crests of the plastic corrugated pipe are welded with the inner surface of the plastic joint, and the number of the wave crests is more than one.
Preferably, the material of the plastic corrugated pipe is a laser-proof material.
Preferably, the plastic joint is made of a laser-transparent material.
Preferably, the melting temperature of the material of the plastic bellows and the plastic joint is similar.
Preferably, the joint of the plastic corrugated pipe and the plastic joint is cylindrical and tubular.
The invention has the following advantages:
1. the performance of the connection structure between the plastic corrugated pipe and the plastic joint can reach no leakage at the connection position under the environment of 0.5MPa through a sealing test, and can pass a long-period aging-resistant test. The flexibility of the connecting structure is improved through laser welding between the plastic pipe fitting and the plastic joint, a plurality of wave crest positions of the plastic corrugated pipe can be welded, the sealing performance is effectively improved, the strength of the connecting structure is higher than that of the pipe body, and long-period aging tests, high-temperature blasting tests and the like can be met;
2. the plastic corrugated pipe can adopt an all-plastic corrugated pipe assembly with any length, a straight line segment is not needed at the connecting position of the pipe body, the flexibility is greatly improved, and the waste is greatly reduced. Compared with simple interference connection, the interference-type pipe joint completely solves the problem of low permeability of media caused by environmental temperature change, service time and vibration, and the strength of a welding position is higher than that of a pipe body through a sealing test and a blasting test.
Drawings
Fig. 1 is a schematic view of a connection structure of a plastic corrugated pipe and a plastic joint in the prior art;
FIG. 2 is a schematic view of a connection structure of a plastic corrugated pipe and a plastic joint according to the present invention;
fig. 3 is a schematic structural view of laser welding of the plastic corrugated pipe and the plastic joint according to the present invention.
Detailed Description
The invention is described in detail below with reference to the drawings, wherein examples of the embodiments are shown in the drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the interconnection of two elements or through the interaction of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 2 and 3, the embodiment of the invention provides a connection structure of a plastic corrugated pipe 10 and a plastic joint 20, which is formed by inserting one end of the plastic corrugated pipe 10 into the plastic joint 20 and connecting the plastic corrugated pipe with the plastic joint 20 through interference fit, and the wave crest of the plastic corrugated pipe 10 and the plastic joint 20 are hermetically fixed through laser welding.
Specifically, in the embodiment of the present invention, a plastic corrugated pipe 10 with any length is provided, one end of the plastic corrugated pipe 10 is inserted into the plastic joint 20, and the two are connected in an interference fit manner, preferably, a fixing clip is arranged at a position where the two are connected to clamp and fix the plastic corrugated pipe 10 and the plastic joint 20, the position of the fixing clip is arranged to avoid a welding position, and the fixing clip is removed after the welding is completed; and then fixing the spliced plastic corrugated pipe 10 and the plastic joint 20 on a laser welding machine, aligning the wave crest position of the plastic corrugated pipe 10 by a laser head to perform a full-circle 360-degree seamless welding (namely welding the wave crest of the plastic corrugated pipe and the inner surface of the plastic joint), wherein the number of the wave crest welding can be one or more, and after one wave crest is welded, the position of the laser head can be adjusted to perform the next wave crest position welding until all the wave crest welding work is finished, so that the plastic corrugated pipe 10 and the plastic joint 20 finally meet the requirements on sealing performance and strength.
The performance of the connection structure between the plastic corrugated pipe 10 and the plastic connector 20 of the embodiment of the invention can achieve no leakage at the connection position under the environment of 0.5MPa through a sealing test, and the bursting position is the pipe body of the plastic corrugated pipe 10, but not the connection structure part between the plastic corrugated pipe 10 and the plastic connector 20, which is obtained through a bursting test.
The welding principle of the embodiment of the invention is that when laser in a short wave infrared region is directed to the position of a wave crest to be bonded, a laser beam passes through an upper layer of light-transmitting material (namely the plastic joint 20) and then is absorbed by a lower layer of material (namely the wave crest of the plastic corrugated pipe 10), laser energy is converted into heat energy after being absorbed, and as the two layers of materials are pressed together, the heat energy is transmitted to the light-transmitting layer from the absorbing layer, so that the two layers of materials are melted and combined. Meanwhile, internal pressure is generated due to the thermal expansion and expansion of the material, and the internal pressure and the external pressure work together to ensure the firm welding of the two parts.
The laser welding apparatus of the present invention may be one known in the art, and as shown in fig. 2, includes a laser head 30, a moving mechanism 40 for moving the position of the laser head 30, a laser generator 50, and a control system for controlling the operation of the whole laser welding apparatus, and is not particularly limited. The plastic joint 20 may be welded to one end of the plastic corrugated pipe 10, or may be welded to both ends of the plastic corrugated pipe 10.
The plastic corrugated pipe 10 of the embodiment of the invention can adopt an all-plastic corrugated pipe 10 with a joint assembly of any length, the connection position of the pipe body does not need a straight line segment (namely is not limited by the circulation of the straight line segment), the flexibility is also greatly improved, compared with simple interference connection, the problem of low medium permeability caused by environmental temperature change, service time and vibration is completely solved, and the strength of the welding position is higher than that of the pipe body after a sealing test and a blasting test. Meanwhile, the problem that the bamboo joint is separated from the pipe at high temperature can be solved.
The embodiment of the invention realizes the laser welding between the plastic pipe fitting and the plastic joint 20, improves the flexibility of the connecting structure, can weld a plurality of wave crest positions of the plastic corrugated pipe 10, effectively improves the sealing performance, and has higher strength than the pipe body.
The plastic corrugated pipe 10 is made of a laser-impermeable material, the wave band of the laser-impermeable material is consistent with the range of the laser wave band, the laser-impermeable material is made of engineering plastics such as PA, PC, ABS, PP and the like, and is prepared by adding a light-absorbing agent (such as carbon black) through modification treatment in the conventional technology, the light absorption rate of the plastic corrugated pipe reaches 90% or more, and the laser energy loss can be ensured to be small. The plastic joint 20 is made of laser-permeable materials, the laser-permeable materials are engineering plastics such as PA, PC, ABS, PP and the like, and the light transmittance requirement of the plastic joint is up to 40% or more by adding a light-permeable agent through modification treatment in the conventional technology. The plastic joint 20 may be an elbow joint as shown in fig. 2 or a straight joint.
Preferably, the melting temperatures of the materials of the plastic corrugated pipe 10 and the plastic joint 20 should be similar or consistent, so that the performance of the plastic corrugated pipe 10 can be prevented from being affected by the excessively high melting temperature of the outer surface of the plastic joint 20, and the similar melting temperatures can make the two have better compatibility during laser welding, thereby improving the bonding quality and the connection performance.
Preferably, the joint of the plastic corrugated pipe 10 and the plastic joint 20 is cylindrical and tubular, which is beneficial to improving the welding precision.
In the embodiment of the invention, parameters such as laser type, wavelength, power and the like in the laser welding can be correspondingly adjusted and matched according to the materials and relevant physical parameters of the plastic corrugated pipe 10 and the plastic joint 20, and the number of turns and the distance of laser beams can be automatically calibrated according to the requirements of sealing and anti-deformation strength of products.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the embodiments of the present invention and not for limiting the same, and although the embodiments of the present invention are described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the embodiments of the present invention, and these modifications or equivalent substitutions cannot make the modified technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A connecting structure of a plastic corrugated pipe and a plastic joint is characterized in that one end of the plastic corrugated pipe is inserted into the plastic joint and connected with the plastic joint in an interference fit mode, and a wave crest of the plastic corrugated pipe is hermetically fixed with the plastic joint through laser welding.
2. A connecting structure of a plastic corrugated pipe and a plastic joint as claimed in claim 1, wherein a fixing clip is further provided at a position where the plastic corrugated pipe and the plastic joint are connected when they are welded, for fixing the plastic corrugated pipe and the plastic joint by clipping.
3. A coupling structure of a plastic bellows and a plastic joint as claimed in claim 1, wherein the plastic bellows is an all-plastic bellows assembly of any length.
4. A connecting structure of a plastic corrugated pipe and a plastic joint as claimed in claim 1, wherein the number of wave crests of the plastic corrugated pipe is one or more than one and is welded to the inner surface of the plastic joint.
5. A coupling structure of a plastic corrugated pipe and a plastic joint as claimed in claim 1, wherein the plastic corrugated pipe is made of a laser-opaque material.
6. A coupling structure of a plastic corrugated pipe and a plastic joint as claimed in claim 1, wherein the plastic joint is made of a laser-transparent material.
7. A coupling structure of a plastic corrugated pipe and a plastic joint as claimed in claim 1, wherein melting temperatures of materials of the plastic corrugated pipe and the plastic joint are uniform.
8. A connecting structure of a plastic corrugated pipe and a plastic joint as claimed in claim 1, wherein the joint of the plastic corrugated pipe and the plastic joint is a cylindrical pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921510365.3U CN210600627U (en) | 2019-09-11 | 2019-09-11 | Connecting structure of plastic corrugated pipe and plastic connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921510365.3U CN210600627U (en) | 2019-09-11 | 2019-09-11 | Connecting structure of plastic corrugated pipe and plastic connector |
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| Publication Number | Publication Date |
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| CN210600627U true CN210600627U (en) | 2020-05-22 |
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| CN201921510365.3U Active CN210600627U (en) | 2019-09-11 | 2019-09-11 | Connecting structure of plastic corrugated pipe and plastic connector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594516A (en) * | 2019-09-11 | 2019-12-20 | 长春亚大汽车零件制造有限公司 | Connecting structure of plastic corrugated pipe and plastic connector |
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2019
- 2019-09-11 CN CN201921510365.3U patent/CN210600627U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594516A (en) * | 2019-09-11 | 2019-12-20 | 长春亚大汽车零件制造有限公司 | Connecting structure of plastic corrugated pipe and plastic connector |
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