CN211059597U - Buckling constraint device for composite material pipe - Google Patents
Buckling constraint device for composite material pipe Download PDFInfo
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- CN211059597U CN211059597U CN201921953132.0U CN201921953132U CN211059597U CN 211059597 U CN211059597 U CN 211059597U CN 201921953132 U CN201921953132 U CN 201921953132U CN 211059597 U CN211059597 U CN 211059597U
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- material pipe
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- 239000002131 composite material Substances 0.000 title claims abstract description 99
- 229910052751 metal Inorganic materials 0.000 claims abstract description 126
- 239000002184 metal Substances 0.000 claims abstract description 126
- 230000000452 restraining effect Effects 0.000 claims description 10
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 230000036316 preload Effects 0.000 claims 2
- 239000000463 material Substances 0.000 abstract description 19
- 230000006872 improvement Effects 0.000 description 9
- 238000004026 adhesive bonding Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- MXWJVTOOROXGIU-UHFFFAOYSA-N atrazine Chemical compound CCNC1=NC(Cl)=NC(NC(C)C)=N1 MXWJVTOOROXGIU-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model discloses a composite material pipe buckling restraint device, which belongs to the technical field of composite materials and comprises a composite material pipe and outer metal sleeves arranged outside two ends of the composite material pipe, wherein a metal sleeve ring is fixedly arranged outside each outer metal sleeve, an outer ring surface of one metal sleeve ring is provided with an external thread, and an outer ring surface of the other metal sleeve ring is a smooth surface; the composite material pipe is arranged between the two outer metal sleeves and is arranged inside the metal constraint sleeve, inner threads matched with the outer threads are arranged on the inner wall of the metal constraint sleeve, and the metal lantern ring with the outer ring surface being a smooth surface is abutted against the inner wall of the metal constraint sleeve. The utility model discloses effectively retrained the whole unstability of combined material pipe and warp, increased substantially combined material pipe axial atress bearing capacity and ductility, helped performance combined material pipe's intensity, improved its axial load-carrying capacity.
Description
Technical Field
The utility model belongs to the technical field of combined material, especially, relate to a combined material pipe bucking restraint device.
Background
The fiber reinforced composite material is formed by winding, molding or pultrusion molding processes of a reinforced fiber material, such as glass fiber, carbon fiber, aramid fiber and the like, and a matrix material. The composite material is gradually widely applied in the engineering field due to the advantages of light weight, high strength, corrosion resistance and the like.
With the development of composite material connecting technology, the realization of a large-span space structure by adopting a composite material pipe becomes possible. However, the overall instability of the composite material pipe is often the cause of structural damage, and in addition, the brittle failure characteristic of the composite material thin-wall pipe fitting makes the composite material pipe have insufficient loaded ductility, and failure has insufficient early warning.
Therefore, in the technical field of composite materials, there is still a need for research and improvement for improving the axial loading performance of the composite material pipe, which is also a research focus and emphasis in the technical field of composite materials at present, and more a starting point of the present invention.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model discloses the technical problem that solve is: the buckling constraint device for the composite material pipe can effectively constrain the overall buckling deformation of the composite material pipe, enables the overall buckling of the composite material pipe to be developed from a low order to a high order, greatly improves the axial stress bearing capacity and ductility of the composite material pipe, contributes to exerting the strength of the composite material pipe and improves the axial load bearing performance of the composite material pipe.
In order to solve the technical problem, the technical scheme of the utility model is that: a buckling constraint device for a composite material pipe comprises the composite material pipe and outer metal sleeves arranged at the outer parts of two ends of the composite material pipe, wherein metal lantern rings are fixedly arranged on the outer parts of the outer metal sleeves, an external thread is arranged on the outer ring surface of one metal lantern ring, and the outer ring surface of the other metal lantern ring is a smooth surface; the buckling constraint device further comprises a metal constraint sleeve, the composite material pipe between the two outer metal sleeves is arranged inside the metal constraint sleeve, an inner thread matched with the outer thread is arranged on the inner wall of the metal constraint sleeve, and the metal sleeve ring with the outer ring surface being a smooth surface abuts against the inner wall of the metal constraint sleeve.
As an improvement, a plurality of outer collars are arranged outside the composite pipe between the two outer metal sleeves, the outer collars are arranged inside the metal constraining sleeves at intervals, and the maximum outer diameter of each outer collar is smaller than the inner diameter of each metal constraining sleeve.
As a further improvement, the outer collar is glued to the outside of the composite pipe.
As an improvement, a first pre-tightening force tooth is arranged between the composite material pipe and the outer metal sleeve.
As an improvement, inner metal sleeves are further arranged inside two ends of the composite material pipe.
As a further improvement, a second pre-tightening tooth is arranged between the composite pipe and the inner metal sleeve.
As a refinement, the metal collar is welded to the outer metal sleeve.
As an improvement, the outer metal sleeve is an outer aluminum alloy sleeve; the metal constraint sleeve is an aluminum alloy constraint sleeve.
After the technical scheme is adopted, the beneficial effects of the utility model are that:
the buckling restraining device for the composite material pipe provided by the utility model is characterized in that the metal sleeve ring is designed outside the outer metal sleeve, the outer ring surface of one metal sleeve ring is provided with the external thread, the outer ring surface of the other metal sleeve ring is the smooth surface, the metal restraining sleeve is designed outside the composite material pipe between the two outer metal sleeves, and the inner thread is designed on the inner wall of one end of the metal restraining sleeve, so that the metal restraining sleeve can be installed outside the composite material pipe in a screwing mode, and the metal sleeve ring with the outer ring surface being the smooth surface can play a role in guiding the metal restraining sleeve in the screwing process, and meanwhile, the installation mode can effectively ensure the centering of the metal restraining sleeve and the composite material pipe, so that the metal restraining sleeve can be prevented from sharing axial force when the composite material pipe is axially stressed, the deformation of the composite pipe can be restrained by the metal restraining sleeve, so that the composite pipe is changed from the existing low-order instability to the high-order instability, the integral instability deformation of the composite pipe is effectively restrained, the axial stress bearing capacity and ductility of the composite pipe are greatly improved, and the axial load-carrying performance of the composite pipe is improved. The utility model provides a combined material pipe bucking restraint device retrains the whole unstability of combined material pipe effectively and warp to make the whole unstability of combined material pipe by the low order to the high-order development, increase substantially combined material tubular axial atress bearing capacity and ductility, help the intensity of performance combined material pipe, improved its axial loading performance.
Because the outer part of the composite material pipe between the two outer metal sleeves is provided with a plurality of outer collars which are distributed at intervals, and the outer collars are positioned in the metal constraint sleeve, the contact state of the composite material pipe and the metal constraint sleeve can be changed, and the constraint performance of the buckling constraint device can be controlled.
Because the outer sleeve ring is glued outside the composite material pipe, the outer sleeve ring is convenient to fix by adopting a gluing mode.
Because be provided with first pretightning force tooth between the combined material pipe with the outer metal sleeve promptly the outer metal sleeve inner wall has carried out the helical tooth processing and has made it have the internal tooth, set up in the periphery of combined material pipe with internal tooth matched with external tooth, when connecting, through exerting the pretightning force and improving the interlaminar shear strength of combined material tooth to make combined material can transmit great load in the junction, realized combined material pipe and outer metal sleeve's reliable connection.
Because the inside inner metal sleeve that still is provided with in the both ends of combined material pipe, further strengthen the tip of combined material pipe through inner metal sleeve.
Because the second pretightening force tooth is arranged between the composite material pipe and the inner metal sleeve, namely, the inner wall of the composite material pipe is processed to be provided with inner teeth through helical teeth, and the outer teeth matched with the inner teeth are arranged on the periphery of the inner metal sleeve, so that the composite material pipe is reliably connected with the inner metal sleeve.
Because the metal lantern ring is welded on the outer metal sleeve, the metal lantern ring is convenient to fix by adopting a welding mode.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the range which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is a perspective view of a composite material pipe buckling restraint apparatus provided in an embodiment of the present invention;
FIG. 2 is a perspective view of the metal constraining sheath of FIG. 1 with the metal constraint sheath removed;
fig. 3 is a schematic diagram of the relative positions of the composite tube, the outer metal sleeve and the inner metal sleeve according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a partial enlarged view of FIG. 4 at B;
in the figure: 1-composite material pipe, 2-outer metal sleeve, 3-metal lantern ring, 31-external thread, 4-metal constraint sleeve, 5-outer lantern ring and 6-inner metal sleeve.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the present specification, the terms "front", "rear", "left", "right", "inner", "outer" and "middle" are used for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes.
As shown in fig. 1 to 5, a buckling constraint device for a composite material pipe includes a composite material pipe 1 and outer metal sleeves 2 disposed outside two ends of the composite material pipe 1, where in order to reduce weight, the outer metal sleeves 2 are outer aluminum alloy sleeves, and certainly, the outer metal sleeves 2 may also be steel sleeves, and so on, which are not described herein again; the metal sleeve ring 3 is fixedly mounted outside each outer metal sleeve 2, and in order to facilitate fixing of the metal sleeve ring 3, preferably, the metal sleeve ring 3 is welded to the outer metal sleeve 2, and of course, other modes that can be realized by those skilled in the art can be adopted to mount the metal sleeve ring 3, for example, modes such as gluing, interference fit, and the like, which are not described herein again. The outer ring surface of one metal lantern ring 3 is provided with external threads 31, and the outer ring surface of the other metal lantern ring 3 is a smooth surface.
The buckling constraint device further comprises a metal constraint sleeve 4, in order to reduce weight, the metal constraint sleeve 4 is an aluminum alloy constraint sleeve, of course, the metal constraint sleeve 4 can also be a steel constraint sleeve, and the like, which is not described herein again; the composite material pipe 1 between the two outer metal sleeves 2 is arranged inside the metal constraint sleeve 4, the inner wall of the metal constraint sleeve 4 is provided with an internal thread (not shown in the figure) matched with the external thread 31, and the metal lantern ring 3 with the outer ring surface being a smooth surface is abutted against the inner wall of the metal constraint sleeve 4.
Like this, can install metal restraint sleeve pipe 4 in the outside of composite material pipe 1 through the mode of twisting soon, at the wrong in-process of twisting, the metal lantern ring 3 that the external anchor ring is the smooth surface can play the guide effect to metal restraint sleeve pipe 4, adopt this kind of mounting means simultaneously, can effectively guarantee the centering of metal restraint sleeve pipe 4 and composite material pipe 1, when composite material pipe 1 is atred in the axial, can avoid metal restraint sleeve pipe 4 to share the axial force, can restrain its deformation through metal restraint sleeve pipe 4, make composite material pipe 1 change from current low order unstability to high order unstability, effectively restrain composite material pipe 1 whole unstability deformation, compound material pipe 1 axial atress bearing capacity and ductility have been increased by a wide margin, help exerting the intensity of composite material pipe 1, the axial load-carrying capacity of the composite material pipe is improved.
In order to change the contact state between the composite material pipe 1 and the metal constraining sleeve 4, as shown in fig. 2, three outer collars 5 are disposed outside the composite material pipe 1 between two outer metal sleeves 2, and it should be noted that the number of the outer collars 5 is not limited to three, and those skilled in the art can select the outer collars according to actual needs, and details are not repeated herein; referring to fig. 1 and 2, the outer collar 5 is located inside the metal constraining sleeve 4, and the maximum outer diameter of the outer collar 5 is smaller than the inner diameter of the metal constraining sleeve 4, so as to control the constraining performance of the buckling constraint device. Preferably, the outer sleeve 5 is glued to the outside of the composite pipe 1, and the outer sleeve 5 is fixed conveniently by means of gluing. Of course, the connection of the outer collar 5 to the composite pipe 1 may also be achieved by means of an interference fit.
In order to realize reliable connection between the composite pipe 1 and the outer metal sleeve 2, it is preferable that a first pre-tightening tooth (not shown in the figure) is arranged between the composite pipe 1 and the outer metal sleeve 2, that is, the inner wall of the outer metal sleeve 2 is processed into a helical tooth to form an inner tooth, and the outer periphery of the composite pipe 1 is provided with an outer tooth matched with the inner tooth, so that when the composite pipe is connected, the interlayer shear strength of the composite pipe tooth is improved by applying the pre-tightening force, and the composite material can transmit a large load at the connection position. Of course, as an alternative, the composite pipe 1 and the outer metal sleeve 2 may be connected by gluing or the like. However, the mode of adopting the pre-tightening force tooth connection is obviously superior to the modes of gluing and the like.
In order to further strengthen the end of the composite pipe 1, in connection with fig. 3, 4 and 5, an inner metal sleeve 6 is also provided inside both ends of the composite pipe 1. In order to achieve reliable connection between the composite pipe 1 and the inner metal sleeve 6, preferably, a second pre-tightening tooth (not shown in the figure) is arranged between the composite pipe 1 and the inner metal sleeve 6, that is, the inner wall of the composite pipe 1 is processed into a helical tooth so as to have inner teeth, and the outer periphery of the inner metal sleeve 6 is provided with outer teeth matched with the inner teeth. Of course, as an alternative, the composite pipe 1 and the inner metal sleeve 6 may be connected by gluing or the like. However, the mode of adopting the pre-tightening force tooth connection is obviously superior to the modes of gluing and the like.
To sum up, the utility model provides a buckling restraint device for composite pipe combines the pretightning force tooth to connect and strengthens, adopts metal constraint sleeve pipe 4 to retrain 1 whole unstability of composite pipe and warp for composite pipe 1 changes from the low order unstability to the high order unstability, has increased substantially 1 axial atress bearing capacity and ductility of composite pipe, helps the intensity of performance composite pipe, has improved its axial load-carrying capacity.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (8)
1. The buckling restraint device for the composite material pipe comprises the composite material pipe and outer metal sleeves arranged at the outer parts of two ends of the composite material pipe, and is characterized in that metal lantern rings are fixedly arranged at the outer parts of the outer metal sleeves, an external thread is arranged on the outer ring surface of one metal lantern ring, and the outer ring surface of the other metal lantern ring is a smooth surface;
the buckling constraint device further comprises a metal constraint sleeve, the composite material pipe between the two outer metal sleeves is arranged inside the metal constraint sleeve, an inner thread matched with the outer thread is arranged on the inner wall of the metal constraint sleeve, and the metal sleeve ring with the outer ring surface being a smooth surface abuts against the inner wall of the metal constraint sleeve.
2. The composite tube buckling restraint apparatus of claim 1, wherein a plurality of spaced outer collars are disposed on the outside of the composite tube between the two outer metal sleeves, the outer collars are disposed inside the metal restraining sleeves, and the maximum outer diameter of the outer collars is smaller than the inner diameter of the metal restraining sleeves.
3. The composite tube buckling restraint apparatus of claim 2, wherein the outer collar is glued to an exterior of the composite tube.
4. A composite tube buckling restraint apparatus as claimed in claim 1, 2 or 3 wherein a first pre-load tooth is provided between the composite tube and the outer metal sleeve.
5. A composite tube buckling restraint according to claim 1, 2 or 3, wherein inner metal sleeves are further provided internally of both ends of the composite tube.
6. The composite tube buckling restraint apparatus of claim 5, wherein a second pre-load tooth is disposed between the composite tube and the inner metal sleeve.
7. The composite tube buckling restraint device of claim 1, wherein the metal collar is welded to the outer metal sleeve.
8. The composite tube buckling restraint apparatus of claim 1, wherein the outer metal sleeve is an outer aluminum alloy sleeve; the metal constraint sleeve is an aluminum alloy constraint sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921953132.0U CN211059597U (en) | 2019-11-13 | 2019-11-13 | Buckling constraint device for composite material pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921953132.0U CN211059597U (en) | 2019-11-13 | 2019-11-13 | Buckling constraint device for composite material pipe |
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| Publication Number | Publication Date |
|---|---|
| CN211059597U true CN211059597U (en) | 2020-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921953132.0U Active CN211059597U (en) | 2019-11-13 | 2019-11-13 | Buckling constraint device for composite material pipe |
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| CN (1) | CN211059597U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110701430A (en) * | 2019-11-13 | 2020-01-17 | 中国人民解放军陆军工程大学 | Buckling constraint device for composite material pipe |
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2019
- 2019-11-13 CN CN201921953132.0U patent/CN211059597U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110701430A (en) * | 2019-11-13 | 2020-01-17 | 中国人民解放军陆军工程大学 | Buckling constraint device for composite material pipe |
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