CN211059137U - Connecting structure of FRP (fiber reinforced plastic) pipe - Google Patents
Connecting structure of FRP (fiber reinforced plastic) pipe Download PDFInfo
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- CN211059137U CN211059137U CN201921983540.0U CN201921983540U CN211059137U CN 211059137 U CN211059137 U CN 211059137U CN 201921983540 U CN201921983540 U CN 201921983540U CN 211059137 U CN211059137 U CN 211059137U
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Abstract
The utility model discloses a connecting structure of FRP pipe, which belongs to the technical field of composite material connection, and comprises an FRP pipe and a flange, wherein at least two drawing and exploding wedge blocks are arranged inside the end head of the FRP pipe, the outer surface of the drawing and exploding wedge blocks is matched with the shape of an inner hole of the FRP pipe, and the drawing and exploding screw rod comprises a conical section matched with the inner surface of the drawing and exploding wedge blocks and a thread section connected with the small end of the conical section; the flange comprises a flange body and a cylindrical part sleeved outside the FRP pipe, the end face of the FRP pipe abuts against the flange body, a first through hole for the threaded section of the explosion screw to penetrate out is formed in the middle of the flange body, and a nut is connected to the penetrating end of the threaded section. The utility model discloses simple structure connects reliably, has improved the bearing capacity of FRP pipe moreover.
Description
Technical Field
The utility model belongs to the technical field of the combined material is connected, especially, relate to a connection structure of FRP pipe.
Background
Fiber Reinforced composite (FRP) is a composite formed by winding, molding or pultrusion a reinforcing Fiber material, such as glass Fiber, carbon Fiber, aramid Fiber, etc., with 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.
At present, the FRP pipe is connected by bonding a metal joint at two ends of a pipe body and then connecting the metal joint with other FRP pipes or parts. However, the adhesive force between the FRP pipe and the metal joint is in direct proportion to the adhesive length within a certain range, and after the adhesive force exceeds the critical length, the adhesive force is not increased along with the increase of the adhesive length, so that the bearing capacity of the FRP pipe is limited, and the adhesive joint has obvious aging problems.
Therefore, in the composite material connection technology field, there is still a need for research and improvement on the connection structure of FRP pipes, which is also a research focus and emphasis in the composite material connection technology field at present, and more the starting point of the present invention is completed.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model discloses the technical problem that solve is: the connecting structure of the FRP pipe is simple in structure and reliable in connection, and bearing capacity of the FRP pipe can be improved.
In order to solve the technical problem, the technical scheme of the utility model is that: a connecting structure of an FRP pipe comprises an FRP pipe and a flange, wherein at least two bursting wedges are arranged inside the end head of the FRP pipe, the outer surfaces of the bursting wedges are matched with the shape of an inner hole of the FRP pipe, all the bursting wedges are enclosed to form an inner cavity for accommodating a bursting screw, and the bursting screw comprises a conical section matched with the inner surface of the bursting wedge and a thread section connected with the small end of the conical section; the flange comprises a flange body and a cylindrical part which is positioned on one side of the flange body and sleeved outside the FRP pipe, the end surface of the FRP pipe is abutted against the flange body, a first through hole for the threaded section of the explosion screw to penetrate out is formed in the middle of the flange body, and a nut is connected to the penetrating end of the threaded section.
As an improvement, a groove is formed in one side, away from the cylindrical portion, of the flange body, and the nut and the penetrating end of the threaded section are located in the groove.
As an improvement, a rubber mat is provided between the cylindrical portion and the FRP pipe.
As a further improvement, the rubber pad is bonded to the cylindrical portion.
As an improvement, a plurality of second through holes are formed in the edge position of the flange body.
As an improvement, the flange is a metal flange.
As an improvement, both ends of the FRP pipe are provided with flanges, and correspondingly, the number of the tension and explosion screw rods and the number of the nuts are two.
After the technical scheme is adopted, the beneficial effects of the utility model are that:
the utility model provides a connection structure of FRP pipe, owing to designed flange, draw and explode the voussoir, draw and explode screw rod and nut, when using like this, will draw and explode the screw rod and put into all draw and explode the voussoir and enclose the inner chamber that closes and form, then will draw and explode the screw rod and all draw and explode a voussoir and push into an end of FRP pipe together, then assemble the flange, make the cylinder portion of flange and the periphery of FRP pipe cooperate, the flange body leans on with the terminal surface of FRP pipe, and make the screw thread section of drawing and exploding the screw rod wear out the flange body, then screw the nut, in the process of screwing the nut, along with drawing and exploding the gradual taut of screw rod, two piece at least draw and explode the voussoir and move outwards gradually, the surface of drawing and exploding the voussoir compresses tightly the FRP pipe on the cylinder portion of flange, and produce sufficient packing force, compare with the, the pressing force is improved, so that the bearing capacity of the FRP pipe is improved; therefore, when two FRP pipes are connected, the end of each FRP pipe is connected with the upper flange, and then the flanges are connected together, so that the connection of the FRP pipes can be realized. The utility model provides a connection structure of FRP pipe can not destroy the FRP pipe, simple structure, connects reliably, has improved the bearing capacity of FRP pipe moreover.
Because the flange body is provided with the groove at one side far away from the cylindrical part, and the nut and the penetrating end of the threaded section are both positioned in the groove, the space occupied by the nut and the penetrating end of the threaded section can be avoided, the space is saved, and meanwhile, the connection of the FRP pipe is convenient.
Because the rubber mat is arranged between the cylindrical part and the FRP pipe, the FRP pipe can be protected through the rubber mat, the friction force between the FRP pipe and the cylindrical part can be increased, and the bearing capacity of the FRP pipe is further improved.
Since the rubber pad is bonded with the cylindrical part, the assembly is convenient.
Because the edge position of the flange body is provided with a plurality of second through holes, the connection between the flanges can be realized through fasteners such as bolts, nuts and the like.
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 schematic structural diagram of a connection structure of an FRP pipe according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is an enlarged view of a portion of FIG. 2 at B;
FIG. 4 is an exploded view of FIG. 1;
FIG. 5 is a perspective view of a pop wedge;
fig. 6 is a schematic structural diagram of a connection structure of an FRP pipe according to a second embodiment of the present invention;
FIG. 7 is a schematic structural view showing a state where two FRP pipes are connected;
in the figure: 1-FRP pipe, 2-flange, 21-flange body, 211-first through hole, 212-second through hole, 22-cylindrical part, 23-groove, 3-explosion wedge, 4-explosion screw, 41-conical section, 42-threaded section, 5-inner cavity, 6-nut, 7-bolt, 8-nut and 9-rubber cushion.
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.
Example one
As shown in fig. 1 to 5, a connection structure of an FRP pipe includes an FRP pipe 1 and a flange 2, in this embodiment, the flange 2 is a metal flange, for example, an aluminum alloy flange, which has a light weight, and the flange 2 may also be made of other materials. Four pieces of bursting wedges 3 are arranged inside the end head of the FRP pipe 1, and it should be noted that the number of the bursting wedges 3 can be selected by those skilled in the art according to actual conditions, and can be two, three, five or the like; the outer surface of the bursting wedge 3 is matched with the shape of an inner hole of the FRP pipe 1, all the bursting wedges 3 enclose to form an inner cavity 5 for accommodating a bursting screw 4, and the bursting screw 4 comprises a conical section 41 matched with the inner surface of the bursting wedge 3 and a thread section 42 connected with the small end of the conical section 41; the flange 2 comprises a flange body 21 and a cylindrical part 22 which is located on one side of the flange body 21 and sleeved outside the FRP pipe 1, the end face of the FRP pipe 1 is abutted against the flange body 21, a first through hole 211 for the threaded section 42 of the tension-explosion screw rod 4 to penetrate out is formed in the middle of the flange body 21, and the penetrating end of the threaded section 42 is connected with a nut 6.
In order to avoid the space occupation of the penetrating ends of the nut 6 and the threaded section 42, the groove 23 is formed in one side, away from the cylindrical part 22, of the flange body 2, and the penetrating ends of the nut 6 and the threaded section 42 are located in the groove 23, so that the space is saved, and the connection of the FRP pipe is facilitated.
Thus, when in use, the expansion screw rod 4 is put into an inner cavity 5 formed by enclosing all the expansion wedges 3, then the explosion screw 4 and all the explosion wedges 3 are pushed into one end part of the FRP pipe 1 together, then the flange 2 is assembled, the cylindrical part 22 of the flange 2 is matched with the periphery of the FRP pipe 1, the flange body 21 is abutted against the end surface of the FRP pipe 1, and the thread section 42 of the pop screw 4 is made to penetrate out of the flange body 21, then the nut 6 is screwed, during the process of screwing the nut 6, the four pieces of the bursting wedges 3 move outwards gradually along with the gradual tightening of the bursting screw 4, the outer surfaces of the bursting wedges 3 press the FRP pipe 1 on the cylindrical part 22 of the flange 2, and enough pressing force is generated, compared with the gluing in the prior art, the contact area between the pull-explosion wedge block 3 and the cylindrical part 22 and the FRP pipe 1 can be enlarged to improve the pressing force, so that the bearing capacity of the FRP pipe 1 is improved; thus, when two FRP pipes are connected, as shown in fig. 7, the end of each FRP pipe 1 is connected with the upper flange 2, and then the two corresponding flanges 2 are connected together, so that the FRP pipes can be connected.
In order to realize connection between the flange and the flange, as shown in fig. 4, six second through holes 212 are formed in the edge position of the flange body 21, it should be noted that the number of the second through holes 212 is not limited to six, and those skilled in the art can select the second through holes according to actual needs, and details are not described herein; as shown in fig. 7, the connection between the flanges can be achieved by fasteners such as bolts 7, nuts 8, etc. Of course, as an alternative, the second through hole may not be provided, and the flange may be connected to the flange by welding or the like.
According to the connection requirement, both ends of the FRP pipe 1 can be provided with flanges 2, and correspondingly, the number of the tension-explosion screw rods 4 and the number of the nuts 6 are two.
Example two
This embodiment is substantially the same as the first embodiment, except that, as shown in fig. 6, a rubber mat 9 is disposed between the cylindrical portion 22 and the FRP pipe 1, and the rubber mat 9 can not only protect the FRP pipe 1, but also increase the friction between the FRP pipe 1 and the cylindrical portion 22, thereby further improving the bearing capacity of the FRP pipe 1.
To facilitate assembly, the rubber pad 9 is bonded to the cylindrical portion 22.
The embodiment also discloses a method for connecting the FRP pipes, which adopts the connecting structure of the FRP pipes and comprises the following steps:
putting the explosion-proof screw rod 4 into an inner cavity 5 formed by enclosing all the explosion-proof wedges 3, then pushing the explosion-proof screw rod 4 and all the explosion-proof wedges 3 into one end part of the FRP pipe 1, further comprising the step of adhering the rubber mat 9 to the cylindrical part 22, then assembling the flange 2, enabling the cylindrical part 22 of the flange 2 to be matched with the periphery of the FRP pipe 1, enabling the flange body 21 to be abutted against the end surface of the FRP pipe 1, enabling the thread section 42 of the explosion-proof screw rod 4 to penetrate out of the flange body 21, and then screwing the nut 6.
To sum up, the utility model provides a connection structure of FRP pipe can not destroy the FRP pipe, simple structure connects reliably, has improved the bearing capacity of FRP pipe moreover.
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 (7)
1. A connecting structure of an FRP pipe comprises an FRP pipe and a flange, and is characterized in that at least two pull-explosion wedges are arranged inside the end head of the FRP pipe, the outer surfaces of the pull-explosion wedges are matched with the shape of an inner hole of the FRP pipe, all the pull-explosion wedges enclose to form an inner cavity for accommodating a pull-explosion screw, and the pull-explosion screw comprises a conical section matched with the inner surface of each pull-explosion wedge and a thread section connected with the small end of the conical section; the flange comprises a flange body and a cylindrical part which is positioned on one side of the flange body and sleeved outside the FRP pipe, the end surface of the FRP pipe is abutted against the flange body, a first through hole for the threaded section of the explosion screw to penetrate out is formed in the middle of the flange body, and a nut is connected to the penetrating end of the threaded section.
2. The FRP pipe connecting structure according to claim 1, wherein a groove is provided in a side of the flange body away from the cylindrical portion, and both the nut and the threaded section penetration end are located in the groove.
3. The FRP pipe connection structure according to claim 1 or 2, wherein a rubber mat is provided between the cylindrical portion and the FRP pipe.
4. The FRP pipe connecting structure according to claim 3, wherein the rubber mat is bonded to the cylindrical portion.
5. The FRP pipe connecting structure according to claim 1, wherein a plurality of second through holes are formed at an edge position of the flange body.
6. The FRP pipe connection structure according to claim 1, wherein the flange is a metal flange.
7. The FRP pipe connecting structure according to claim 1, wherein flanges are provided at both ends of the FRP pipe, and accordingly, there are two of the tension and explosion screw and the nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921983540.0U CN211059137U (en) | 2019-11-15 | 2019-11-15 | Connecting structure of FRP (fiber reinforced plastic) pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921983540.0U CN211059137U (en) | 2019-11-15 | 2019-11-15 | Connecting structure of FRP (fiber reinforced plastic) pipe |
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| Publication Number | Publication Date |
|---|---|
| CN211059137U true CN211059137U (en) | 2020-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921983540.0U Active CN211059137U (en) | 2019-11-15 | 2019-11-15 | Connecting structure of FRP (fiber reinforced plastic) pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714960A (en) * | 2019-11-15 | 2020-01-21 | 中国人民解放军陆军工程大学 | Connecting structure and connecting method of FRP (fiber reinforced plastic) pipe |
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2019
- 2019-11-15 CN CN201921983540.0U patent/CN211059137U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714960A (en) * | 2019-11-15 | 2020-01-21 | 中国人民解放军陆军工程大学 | Connecting structure and connecting method of FRP (fiber reinforced plastic) pipe |
| CN110714960B (en) * | 2019-11-15 | 2024-03-29 | 中国人民解放军陆军工程大学 | Connection structure and connection method of FRP (fiber reinforced Plastic) pipes |
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