CN110714960B - Connection structure and connection method of FRP (fiber reinforced Plastic) pipes - Google Patents
Connection structure and connection method of FRP (fiber reinforced Plastic) pipes Download PDFInfo
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- CN110714960B CN110714960B CN201911117737.0A CN201911117737A CN110714960B CN 110714960 B CN110714960 B CN 110714960B CN 201911117737 A CN201911117737 A CN 201911117737A CN 110714960 B CN110714960 B CN 110714960B
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- Prior art keywords
- explosion
- frp pipe
- flange
- pulling
- frp
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 229920002430 Fibre-reinforced plastic Polymers 0.000 title description 82
- 239000011151 fibre-reinforced plastic Substances 0.000 title description 82
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000002131 composite material Substances 0.000 abstract description 6
- 230000000149 penetrating effect Effects 0.000 abstract description 6
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 239000003365 glass fiber 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
- 238000000465 moulding Methods 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
- F16B7/02—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections with conical parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
- F16B7/18—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements
- F16B7/182—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements for coaxial connections of two rods or tubes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The invention discloses a connection structure and a connection method of an FRP pipe, belonging to the technical field of composite material connection, wherein the connection structure of the FRP pipe comprises an FRP pipe and a flange, at least two explosion-pulling wedges are arranged inside the end head of the FRP pipe, the outer surface of each explosion-pulling wedge is matched with the shape of an inner hole of the FRP pipe, and each explosion-pulling screw comprises a conical section matched with the inner surface of each explosion-pulling wedge and a thread section connected with the small end of each conical section; the flange comprises a flange body and a cylindrical part sleeved outside the FRP pipe, the end face of the FRP pipe is propped against the flange body, a first through hole for the threaded section of the explosion-pulling 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 connection method of the FRP pipe adopts the connection structure of the FRP pipe. The invention has simple structure and reliable connection, and improves the bearing capacity of the FRP pipe.
Description
Technical Field
The invention belongs to the technical field of composite material connection, and particularly relates to a connection structure and a connection method of FRP pipes.
Background
The fiber reinforced composite material (Fiber Reinforced Polymer, fiber Reinforced Plastic, or FRP for short) is a composite material formed by winding, molding or pultrusion a reinforcing fiber material such as glass fiber, carbon fiber, aramid fiber, or the like with a matrix material. The composite material is gradually and widely applied in the engineering field due to the advantages of light weight, high strength, corrosion resistance and the like.
At present, the connection of the FRP pipe adopts bonding a metal joint at two ends of the pipe body, and then the connection is carried out with other FRP pipes or parts through the metal joint. However, the bonding force of the FRP pipe and the metal joint is proportional to the bonding length within a certain range, the bonding force is not increased with the increase of the bonding length after the critical length is exceeded, the phenomenon limits the bearing capacity of the FRP pipe, and the bonding has obvious aging problem.
Therefore, in the technical field of composite material connection, there is still a need for research and improvement on the connection structure of the FRP pipe, which is also a research hotspot and an important point in the technical field of composite material connection at present, and is more a starting point for the completion of the present invention.
Disclosure of Invention
Therefore, the first technical problem to be solved by the invention is as follows: the connection structure of the FRP pipe is simple in structure and reliable in connection, and the bearing capacity of the FRP pipe can be improved.
As the same technical concept, the second technical problem to be solved by the invention is as follows: provided is a connection method of FRP pipes.
In order to solve the first technical problem, the technical scheme of the invention is as follows: the connection structure of the FRP pipe comprises the FRP pipe and a flange, wherein at least two explosion-pulling wedges are arranged inside the end head of the FRP pipe, the outer surface of each explosion-pulling wedge is matched with the shape of an inner hole of the FRP pipe, all the explosion-pulling wedges are enclosed to form an inner cavity for accommodating an explosion-pulling screw, and each explosion-pulling screw comprises a conical section matched with the inner surface of each explosion-pulling wedge and a threaded section connected with the small end of each conical section; the flange comprises a flange body and a cylinder part which is positioned on one side of the flange body and sleeved outside the FRP pipe, the end face of the FRP pipe is propped against the flange body, a first through hole for the thread section of the explosion-pulling screw to penetrate out is formed in the middle of the flange body, and a nut is connected to the penetrating end of the thread section.
As an improvement, a groove is arranged on one side of the flange body away from the cylinder part, and the threaded nut and the penetrating end of the threaded section are both positioned in the groove.
As an improvement, a rubber pad is provided between the cylindrical portion and the FRP pipe.
As a further improvement, the rubber pad is bonded with 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, flanges are arranged at two ends of the FRP pipe, and correspondingly, the explosion-pulling screw rod and the nut are two.
In order to solve the second technical problem, the technical scheme of the invention is as follows: the connection method of the FRP pipe adopts the connection structure of the FRP pipe and comprises the following steps:
putting the explosion-pulling screw into the inner cavity formed by enclosing all the explosion-pulling wedges, pushing the explosion-pulling screw and all the explosion-pulling wedges into one end part of the FRP pipe together, assembling the flange to enable the cylindrical part of the flange to be matched with the periphery of the FRP pipe, abutting the flange body against the end surface of the FRP pipe, enabling the thread section of the explosion-pulling screw to penetrate out of the flange body, and screwing the nut.
As a modification, before assembling the flange, a step of adhering a rubber pad to the cylindrical portion is further included.
After the technical scheme is adopted, the invention has the beneficial effects that:
according to the FRP pipe connecting structure and the FRP pipe connecting method, the flange, the explosion-pulling wedge blocks, the explosion-pulling screw rods and the nuts are designed, so that when the FRP pipe connecting structure is used, the explosion-pulling screw rods are placed into the inner cavities formed by encircling all the explosion-pulling wedge blocks, then the explosion-pulling screw rods and all the explosion-pulling wedge blocks are pushed into one end part of the FRP pipe together, then the flange is assembled, the cylindrical part of the flange is matched with the periphery of the FRP pipe, the flange body abuts against the end surface of the FRP pipe, the thread sections of the explosion-pulling screw rods penetrate out of the flange body, then the nuts are screwed, at least two explosion-pulling wedge blocks move outwards gradually along with gradual tightening of the explosion-pulling screw rods in the screwing process of the nuts, the FRP pipe is pressed on the cylindrical part of the flange by the outer surfaces of the explosion-pulling wedge blocks, and enough pressing force is generated, and compared with the cementing method in the prior art, the pressing force can be improved by enlarging the contact area of the explosion-pulling wedge blocks and the FRP pipe, and the bearing capacity of the FRP pipe is improved; when two FRP pipes are connected, a flange is connected to the end of each FRP pipe, and then the flanges are connected together, so that the connection of the FRP pipes can be realized. The connection structure and the connection method of the FRP pipe provided by the invention can not damage the FRP pipe, have simple structure and reliable connection, and improve the bearing capacity of the FRP pipe.
Because the flange body is provided with the recess far away from one side of drum portion, the nut with the end of wearing out of screw thread section all is located in the recess, can avoid the end occupation space of wearing out of nut and screw thread section like this, save space, make things convenient for the connection of FRP pipe simultaneously.
Due to the rubber cushion arranged between the cylinder part and the FRP pipe, the FRP pipe can be protected through the rubber cushion, and the friction force between the FRP pipe and the cylinder part can be increased, so that the bearing capacity of the FRP pipe is further improved.
The rubber pad and the cylinder part are adhered together, so that the assembly is convenient.
Because a plurality of second through holes are formed in the edge position of the flange body, connection between the flanges can be achieved through bolts, nuts and other fasteners.
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 will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the scope of the invention.
FIG. 1 is a schematic view of a connection structure of FRP pipes 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 pull-burst wedge;
FIG. 6 is a schematic structural view of a connection structure of FRP pipes according to the second embodiment of the present invention;
FIG. 7 is a schematic view of the structure of a connection state of two FRP pipes;
in the figure: the steel pipe comprises a 1-FRP pipe, a 2-flange, a 21-flange body, a 211-first through hole, a 212-second through hole, a 22-cylinder part, a 23-groove, a 3-explosion wedge block, a 4-explosion screw, a 41-conical section, a 42-threaded section, a 5-inner cavity, a 6-nut, a 7-bolt, an 8-nut and a 9-rubber pad.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms such as "front", "rear", "left", "right", "inner", "outer", "middle" and the like in the present specification are also used for descriptive purposes only and are not intended to limit the scope of the invention in which the invention may be practiced, but rather the relative relationship of the terms may be altered or modified without materially altering the technical context.
Example 1
As shown in fig. 1 to 5 together, 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, may be an aluminum alloy flange, and the aluminum alloy has a relatively light weight, and of course, the flange 2 may be made of other materials. Four explosion-pulling wedges 3 are arranged in the end head of the FRP pipe 1, and the number of the explosion-pulling wedges 3 can be selected by a person skilled in the art according to actual conditions, and can be two, three, five and the like; the outer surface of the explosion-pulling wedge block 3 is matched with the shape of an inner hole of the FRP pipe 1, all the explosion-pulling wedge blocks 3 are enclosed to form an inner cavity 5 for accommodating an explosion-pulling screw 4, and the explosion-pulling screw 4 comprises a conical section 41 matched with the inner surface of the explosion-pulling wedge block 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 cylinder part 22 which is arranged on one side of the flange body 21 and sleeved outside the FRP pipe 1, the end face of the FRP pipe 1 is propped against the flange body 21, a first through hole 211 for the thread section 42 of the explosion-pulling screw 4 to penetrate is formed in the middle of the flange body 21, and a nut 6 is connected to the penetrating end of the thread section 42.
In order to avoid the occupation of the space at the penetrating ends of the nut 6 and the thread section 42, a groove 23 is arranged on one side of the flange body 2 away from the cylinder part 22, and the penetrating ends of the nut 6 and the thread section 42 are positioned in the groove 23, so that the space is saved, and meanwhile, the connection of the FRP pipe is facilitated.
When the FRP pipe is used, the explosion-pulling screw 4 is placed into an inner cavity 5 formed by encircling all the explosion-pulling wedges 3, then the explosion-pulling screw 4 and all the explosion-pulling 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 abuts against the end face of the FRP pipe 1, the thread section 42 of the explosion-pulling screw 4 penetrates out of the flange body 21, then the nut 6 is screwed, in the process of screwing the nut 6, the four explosion-pulling wedges 3 move outwards gradually along with gradual tightening of the explosion-pulling screw 4, the outer surface of the explosion-pulling wedges 3 tightly presses the FRP pipe 1 on the cylindrical part 22 of the flange 2, and enough compaction force is generated, and compared with the cementing in the prior art, the compaction force can be improved by enlarging the contact area of the explosion-pulling wedges 3 and the cylindrical part 22 and the FRP pipe 1, so that the bearing capacity of the FRP pipe 1 is improved; when two FRP pipes are connected, as shown in fig. 7, the flange 2 is connected to the end of each FRP pipe 1, and then the two corresponding flanges 2 are connected together, so that the connection of the FRP pipes can be realized.
In order to realize connection between the flanges, as shown in fig. 4, six second through holes 212 are provided at the edge of the flange body 21, and 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 according to actual needs, which is not described herein again; as shown in fig. 7, the connection between the flanges can thus be achieved by means of fasteners such as bolts 7, nuts 8, etc. Of course, as an alternative, the second through hole may not be provided, and the connection between the flanges may be achieved by welding or the like.
According to the connection requirement, the two ends of the FRP pipe 1 can be provided with flanges 2, and correspondingly, the two explosion-pulling screws 4 and the two nuts 6 are respectively arranged.
Example two
The present embodiment is basically the same as the first embodiment, except that, as shown in fig. 6, a rubber pad 9 is provided between the cylindrical portion 22 and the FRP pipe 1, and by the rubber pad 9, not only the FRP pipe 1 can be protected, but also the friction force between the FRP pipe 1 and the cylindrical portion 22 can be increased, further improving the carrying capacity of the FRP pipe 1.
For ease of assembly, the rubber pad 9 is bonded to the cylindrical portion 22.
The embodiment also discloses a connection method of the FRP pipe, which adopts the connection structure of the FRP pipe and comprises the following steps:
the explosion-pulling screw 4 is placed into an inner cavity 5 formed by enclosing all the explosion-pulling wedges 3, then the explosion-pulling screw 4 and all the explosion-pulling wedges 3 are pushed into one end part of the FRP pipe 1 together, the steps of adhering the rubber pad 9 to the cylindrical part 22 are further included, 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 abuts against the end face of the FRP pipe 1, the thread section 42 of the explosion-pulling screw 4 penetrates out of the flange body 21, and then the nut 6 is screwed.
In conclusion, the connection structure and the connection method of the FRP pipe provided by the invention can not damage the FRP pipe, have simple structure and reliable connection, and improve the bearing capacity of the FRP pipe.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (2)
1. The connection method of the FRP pipe is characterized in that the connection structure of the FRP pipe comprises the FRP pipe and a flange, at least two explosion-pulling wedges are arranged inside the end head of the FRP pipe, the outer surfaces of the explosion-pulling wedges are matched with the shape of an inner hole of the FRP pipe, all the explosion-pulling wedges are enclosed to form an inner cavity for accommodating an explosion-pulling screw rod, and the explosion-pulling screw rod comprises a conical section matched with the inner surface of the explosion-pulling wedge and a thread section connected with the small end of the conical section; the flange includes the flange body and is located flange body one side and cover establish the drum portion outside the FRP pipe, the terminal surface of FRP pipe support lean on in the flange body, the first through-hole that supplies the screw thread section of the explosion-proof screw rod was worn out is seted up at the middle part of flange body, be connected with the nut on the wearing out end of screw thread section, the flange body is kept away from one side of drum portion is provided with the recess, the nut with the wearing out end of screw thread section all is located in the recess, drum portion with be provided with the cushion between the FRP pipe, the cushion with drum portion bonds together, a plurality of second through-hole has been seted up to the border position of flange body, the flange is metal flange, the both ends of FRP pipe all are provided with the flange, corresponding, the explosion-proof screw rod with the nut all has two, includes the following steps:
putting the explosion-pulling screw into the inner cavity formed by enclosing all the explosion-pulling wedges, pushing the explosion-pulling screw and all the explosion-pulling wedges into one end part of the FRP pipe together, assembling the flange to enable the cylindrical part of the flange to be matched with the periphery of the FRP pipe, abutting the flange body against the end surface of the FRP pipe, enabling the thread section of the explosion-pulling screw to penetrate out of the flange body, and screwing the nut.
2. The connection method of FRP pipes according to claim 1, further comprising a step of adhering a rubber pad to the cylindrical portion before assembling the flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911117737.0A CN110714960B (en) | 2019-11-15 | 2019-11-15 | Connection structure and connection method of FRP (fiber reinforced Plastic) pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911117737.0A CN110714960B (en) | 2019-11-15 | 2019-11-15 | Connection structure and connection method of FRP (fiber reinforced Plastic) pipes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110714960A CN110714960A (en) | 2020-01-21 |
| CN110714960B true CN110714960B (en) | 2024-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911117737.0A Active CN110714960B (en) | 2019-11-15 | 2019-11-15 | Connection structure and connection method of FRP (fiber reinforced Plastic) pipes |
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| Country | Link |
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| CN (1) | CN110714960B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111864630B (en) * | 2020-08-11 | 2022-08-23 | 国网青海省电力公司海西供电公司 | Telescopic insulating operating rod |
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| CN211059137U (en) * | 2019-11-15 | 2020-07-21 | 中国人民解放军陆军工程大学 | Connecting structure of FRP (fiber reinforced plastic) pipe |
-
2019
- 2019-11-15 CN CN201911117737.0A patent/CN110714960B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2866928Y (en) * | 2005-12-03 | 2007-02-07 | 李福德 | Assembling shelf tube fittings interconnecting unit |
| CN101324247A (en) * | 2007-06-12 | 2008-12-17 | 埃里度·S.公司 | Device for connection of a tube to a structure |
| CN201351789Y (en) * | 2008-12-25 | 2009-11-25 | 中国北车集团大连机车车辆有限公司 | Sealing plug capable of expanding at pipe opening |
| CN201636150U (en) * | 2010-01-28 | 2010-11-17 | 河南农业大学 | Expansion fixing connection structure |
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| CN110714960A (en) | 2020-01-21 |
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