CN110762312B - Connection structure and connection method of pultruded reinforced FRP pipe - Google Patents
Connection structure and connection method of pultruded reinforced FRP pipe Download PDFInfo
- Publication number
- CN110762312B CN110762312B CN201911117589.2A CN201911117589A CN110762312B CN 110762312 B CN110762312 B CN 110762312B CN 201911117589 A CN201911117589 A CN 201911117589A CN 110762312 B CN110762312 B CN 110762312B
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- frp pipe
- reinforced
- cylindrical
- flange
- pultruded
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000002787 reinforcement Effects 0.000 claims abstract description 33
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 230000004323 axial length Effects 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 abstract description 6
- 230000003014 reinforcing effect Effects 0.000 description 14
- 239000000463 material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 2
- 239000011151 fibre-reinforced plastic Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000004873 anchoring Methods 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
- 238000004519 manufacturing process Methods 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
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/14—Flanged joints
-
- 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
- F16B7/04—Clamping or clipping connections
- F16B7/0406—Clamping or clipping connections for rods or tubes being coaxial
-
- 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
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/12—Rigid pipes of plastics with or without reinforcement
- F16L9/127—Rigid pipes of plastics with or without reinforcement the walls consisting of a single layer
- F16L9/128—Reinforced pipes
-
- 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
- F16S—CONSTRUCTIONAL ELEMENTS IN GENERAL; STRUCTURES BUILT-UP FROM SUCH ELEMENTS, IN GENERAL
- F16S3/00—Elongated members, e.g. profiled members; Assemblies thereof; Gratings or grilles
-
- 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
- F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
- F16B2200/40—Clamping arrangements where clamping parts are received in recesses of elements to be connected
- F16B2200/406—Clamping parts being collars, bushings or wedges
-
- 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
- F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
- F16B2200/50—Flanged connections
- F16B2200/506—Flanged connections bolted or riveted
Abstract
The invention discloses a connection structure and a connection method of a pultruded reinforced FRP pipe, which belong to the technical field of composite material connection, wherein the connection structure of the pultruded reinforced FRP pipe comprises an FRP pipe and a flange plate, at least two reinforced bars are arranged on the inner wall of the FRP pipe, each reinforced bar comprises a cylindrical reinforced part and a supporting part, and at least one end of the cylindrical reinforced part is provided with a connection section extending out of the supporting part; the flange plate comprises a cylinder part, a flange part and a connecting part, wherein a first through hole is formed in the connecting part; the connecting portion of the flange plate abuts against the end face of the supporting portion of the reinforcement, each connecting section of the cylindrical reinforcement portion penetrates through the corresponding first through hole, and locking pieces are arranged at the penetrating-out ends of the connecting sections. The connection method of the pultruded reinforced FRP pipe adopts the connection structure of the pultruded reinforced 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 a pultruded reinforced FRP pipe.
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 connecting structure of the pultruded reinforced 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: a method for connecting a pultruded reinforced FRP pipe is provided.
In order to solve the first technical problem, the technical scheme of the invention is as follows: the connecting structure of the pultruded reinforced FRP pipe comprises an FRP pipe and a flange, wherein at least two reinforced ribs are arranged on the inner wall of the FRP pipe, each reinforced rib comprises a cylindrical reinforced rib part and a supporting part arranged between the inner wall of the FRP pipe and the cylindrical reinforced rib part, the axial length of the cylindrical reinforced rib part is greater than that of the supporting part, and at least one end of the cylindrical reinforced rib part is provided with a connecting section extending out of the supporting part;
the flange plate comprises a cylindrical part matched with an inner hole at the end part of the FRP pipe, a flange part which is positioned at one end of the cylindrical part and outwards extends, and a connecting part which is positioned in the other end of the cylindrical part, wherein a first through hole corresponding to the cylindrical reinforcement part is formed in the connecting part;
the connecting portion of the flange plate abuts against the end face of the supporting portion of the reinforcement, each connecting section of the cylindrical reinforcement portion penetrates through the corresponding first through hole, and locking pieces are arranged at the penetrating-out ends of the connecting sections.
As an improvement, the flange plate further comprises an annular part which is positioned outside the cylindrical part and is arranged concentrically with the cylindrical part, and the annular part is matched with the periphery of the end part of the FRP pipe.
As an improvement, the locking piece comprises an anchor ring and at least two clamping pieces, wherein the anchor ring is provided with a conical inner hole, the outer surfaces of the clamping pieces are matched with the shape of the inner hole of the anchor ring, and all the clamping pieces are enclosed to form an inner cavity matched with the connecting section of the cylindrical reinforcement part.
As an improvement, the reinforcement and the FRP pipe are integrally formed by a pultrusion process.
As an improvement, a plurality of second through holes are formed in the flange portion of the flange plate.
As an improvement, the flange plate is a metal flange.
As an improvement, both ends of the cylindrical reinforcement part are provided with the connecting sections extending out of the supporting part; the flange plates are arranged at two ends of the FRP pipe.
As an improvement, the middle part of the connecting part is provided with a lightening hole.
In order to solve the second technical problem, the technical scheme of the invention is as follows: the connection method of the pultruded reinforced FRP pipe adopts the connection structure of the pultruded reinforced FRP pipe, and comprises the following steps:
integrally forming the FRP pipe and the reinforcement by a pultrusion process, and cutting off at least one end of the reinforcement positioned on the supporting part, so that at least one end of the cylindrical reinforcement part is provided with a connecting section extending out of the supporting part;
the flange plate is assembled, the cylindrical part of the flange plate is matched with an inner hole at the end part of the FRP pipe, the connecting part of the flange plate abuts against the end face of the supporting part of the reinforced bar, the connecting section of each cylindrical reinforced bar part penetrates through the corresponding first through hole, and then the locking piece is arranged at the penetrating end of the connecting section.
After the technical scheme is adopted, the invention has the beneficial effects that:
according to the connecting structure and the connecting method of the pultruded reinforced FRP pipe, the reinforced rib is designed in the FRP pipe, and the flange plate and the locking piece are designed, so that when the connecting structure is used, the flange plate is assembled at the end part of the FRP pipe, the cylindrical part of the flange plate is matched with the inner hole at the end part of the FRP pipe, the connecting part of the flange plate abuts against the end surface of the supporting part of the reinforced rib, the connecting section of each cylindrical reinforced rib part penetrates through the corresponding first through hole, and then the locking piece is arranged at the penetrating end of the connecting section, so that the FRP pipe and the flange plate are connected together, and when two FRP pipes are connected, the flange plate is connected at the end part of each FRP pipe, and then the two flange plates are connected together, so that the connection of the FRP pipes can be realized; the flange plate has the function of bearing the pressure of the two FRP pipes after being connected, and the locking piece fixes the reinforcement of the FRP pipes on the flange plate, so that the tension can be borne. Compared with the cementing in the prior art, the number of the reinforcing bars and the locking pieces can be calculated by mechanics according to the requirement, so that the bearing capacity of the FRP pipe is improved. 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 plate also comprises an annular part positioned outside the cylindrical part, the annular part is matched with the periphery of the end part of the FRP pipe, and thus, the annular part and the cylindrical part can form an annular groove, and the end part of the FRP pipe is positioned in the annular groove, thereby playing a role in protecting the FRP pipe.
Because the retaining member includes anchor ring and two piece at least clamping pieces, the anchor ring has the toper hole, the surface of clamping piece with anchor ring hole shape looks adaptation, all the clamping piece enclose to close and form be used for with the linkage segment matched with of cylinder reinforcement portion inner chamber, can first put in the anchor ring on the wearing out end of linkage segment, then pack into between the wearing out end of anchor ring and linkage segment with all clamping pieces, along with the wedging of clamping piece, the inner chamber of clamping piece holds tightly the wearing out end of linkage segment, realizes with the reinforcement anchor of FRP pipe on the ring flange, easy operation, the anchor is reliable.
Because a plurality of second through holes are formed in the flange part of the flange plate, connection between the flange plates can be achieved through fasteners such as bolts and nuts.
The middle part of the connecting part is provided with a lightening hole, so that the weight of the flange plate can be lightened.
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 structural view of a connection structure of a pultruded reinforced FRP pipe provided by an embodiment of the present invention;
FIG. 2 is a perspective view of FIG. 1;
FIG. 3 is a partial enlarged sectional view of A-A of FIG. 1;
FIG. 4 is an exploded view of FIG. 1;
FIG. 5a is a schematic structural view of a pultruded reinforced FRP pipe;
FIG. 5B is a B-B cross-sectional view of FIG. 5 a;
FIG. 5c is a perspective view of FIG. 5 a;
FIG. 6a is a schematic structural view of a flange;
FIG. 6b is a C-C cross-sectional view of FIG. 6 a;
FIG. 6c is a perspective view of FIG. 6 a;
FIG. 6d is a perspective view of the other view of FIG. 6 a;
FIG. 7a is a schematic view of the structure of an anchor ring;
FIG. 7b is a D-D cross-sectional view of FIG. 7 a;
FIG. 8 is a perspective view of the clip;
FIG. 9 is a schematic structural view of a connection state of two pultruded reinforced FRP pipes;
in the figure: 1-FRP pipe, 11-reinforcing, 111-cylindrical reinforcing part, 1111-connecting section, 112-supporting part, 2-flange, 21-cylindrical part, 22-flange, 221-second through hole, 23-connecting part, 231-first through hole, 232-lightening hole, 24-annular part, 3-locking piece, 31-anchor ring, 32-clamping piece, 4-bolt, 5-nut.
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.
As shown in fig. 1 to 4 together, a connection structure of a pultruded reinforced FRP pipe includes an FRP pipe 1 and a flange 2, where the flange 2 is a metal flange, for example, may be an aluminum alloy flange, and the aluminum alloy has a lighter weight, and of course, the flange 2 may also be made of other materials.
As shown in fig. 5 a-5 c together, three reinforcing ribs 11 are arranged on the inner wall of the FRP pipe 1, and the reinforcing ribs 11 and the FRP pipe 1 are integrally formed through a pultrusion process, so that the production efficiency is high. It should be noted that, the number of the reinforcing bars 11 can be selected by those skilled in the art according to actual needs through mechanical calculation, and may be two, four, five, etc. Each reinforcement 11 includes a cylindrical reinforcement portion 111 and a support portion 112 disposed between the inner wall of the FRP pipe 1 and the cylindrical reinforcement portion 111, the axial length of the cylindrical reinforcement portion 111 is greater than that of the support portion 112, and one end of the cylindrical reinforcement portion 111 has a connection section 1111 extending from the support portion 112, which may, of course, be provided with connection sections extending from the support portion 112 at both ends of the cylindrical reinforcement portion 111 according to connection requirements, and at this time, both ends of the FRP pipe 1 may be provided with flanges 2. In the present embodiment, the support portion 112 is a plate-like structure.
As shown in fig. 3 and fig. 6 a-6 d together, the flange 2 includes a cylinder portion 21 matching with the inner hole of the end portion of the FRP pipe 1, a flange portion 22 located at one end of the cylinder portion 21 and protruding outwards, and a connecting portion 23 located in the other end of the cylinder portion 21, where the flange portion 22 has a circular ring structure, and of course, as an alternative, the flange portion 22 may have other structures such as square, and will not be described herein; the connection portion 23 is provided with a first through hole 231 corresponding to the cylindrical reinforcement portion 111; the flange 2 further includes an annular portion 24 located outside the cylindrical portion 21 and concentrically arranged with the cylindrical portion 21, the annular portion 24 being fitted to the outer periphery of the end portion of the FRP pipe 1, so that the annular portion 24 and the cylindrical portion 21 can form an annular groove so that the end portion of the FRP pipe 1 is located in the annular groove, thereby functioning to protect the FRP pipe 1. Preferably, in order to further protect the end of the FRP pipe 1, a rubber pad (not shown) may be further provided on the inner wall of the annular groove. In order to reduce the weight of the flange 2, the middle of the connection portion 23 is provided with a weight reducing hole 232. Of course, the connection portion 23 may not be provided with the weight reducing hole 232.
As shown in fig. 3, the connecting portion 23 of the flange 2 abuts against the end face of the supporting portion 112 of the reinforcement 11, and the connecting section 1111 of each cylindrical reinforcement portion 111 passes through the corresponding first through hole, and the locking member 3 is disposed on the penetrating end of the connecting section 1111.
In this embodiment, as shown in fig. 3, fig. 4, fig. 7a, fig. 7b, and fig. 8 together, the locking member 3 includes an anchor ring 31 and three clips 32, and the number of the clips 32 can be selected by those skilled in the art according to practical situations, and can be two, four, five, etc.; the anchor ring 31 has a tapered inner bore, the outer surfaces of the clips 32 are adapted to the shape of the inner bore of the anchor ring 31, and all clips 32 enclose an inner cavity for cooperation with the connecting section 1111 of the cylindrical reinforcement 111. Of course, as an alternative, threads may be provided on the connection section 1111 of the cylindrical reinforcement portion 111, and the locking member may be a nut, which will not be described herein.
When the FRP pipe is used, the flange plate 2 is assembled at the end part of the FRP pipe 1, the cylinder part 21 of the flange plate 2 is matched with the inner hole at the end part of the FRP pipe 1, the annular part 24 is matched with the periphery of the end part of the FRP pipe 1, the connecting part 23 of the flange plate 2 is propped against the end surface of the supporting part 112 of the reinforcing bar 11, the connecting section 1111 of each cylindrical reinforcing bar 111 penetrates through the corresponding first through hole 231, then the penetrating end of the connecting section 1111 is sleeved with the anchor ring 31, all clamping pieces 32 are plugged between the anchor ring 31 and the penetrating end of the connecting section 1111, the inner cavity of the clamping piece 32 is tightly held at the penetrating end of the connecting section 1111 along with the wedging of the clamping pieces 32, the reinforced bar 11 of the FRP pipe 1 is anchored on the flange plate 2, the operation is simple, the anchoring is reliable, and when the two FRP pipes 2 are connected, as shown in fig. 9, the end part of each FRP pipe 1 is connected with the flange plate 2, and then the corresponding two flange plates are connected together, so that the FRP pipe can be connected; the flange plate 2 has the function of bearing the pressure of the two FRP pipes 1 after being connected, and the locking piece 3 fixes the reinforcement 11 of the FRP pipe 1 on the flange plate 2, so that the tension can be borne. Compared with the cementing in the prior art, the number of the reinforcing bars 11 and the locking pieces 3 can be calculated by mechanics according to the requirement, so that the bearing capacity of the FRP pipe 1 is improved.
In order to realize connection between the flanges, as shown in fig. 6c, six second through holes 221 are formed on the flange portion 22 of the flange 2, it should be noted that the number of the second through holes 221 is not limited to six, and those skilled in the art can select according to actual needs, which is not repeated here; as shown in fig. 9, the connection between the flanges can thus be achieved by means of fasteners such as bolts 4, nuts 5, etc. Of course, as an alternative, the second through hole may not be provided, and the connection between the flange plates may be achieved by welding or the like.
The embodiment of the invention also discloses a connection method of the pultruded reinforced FRP pipe, which adopts the connection structure of the pultruded reinforced FRP pipe and comprises the following steps:
the FRP pipe 1 and the reinforcing bars 11 are integrally formed through a pultrusion process, then one end of the reinforcing bars 11, which is positioned at the supporting part 112, is cut off, so that one end of the cylindrical reinforcing bar 111 is provided with a connecting section 1111 extending out of the supporting part 112, and naturally, both ends of the reinforcing bars 11, which are positioned at the supporting part 112, can be cut off; the flange plate 2 is assembled so that the cylindrical portion 21 of the flange plate 2 is fitted with the inner hole of the end portion of the FRP pipe 1, the connecting portion 23 of the flange plate 2 abuts against the end face of the supporting portion 112 of the reinforcing bar 11, and the connecting section 1111 of each cylindrical reinforcing bar portion 111 is passed through the corresponding first through hole 231, and then the locking member 3 is provided on the passing-out end of the connecting section 1111.
In summary, the connection structure and the connection method of the FRP pipe provided by the embodiment of 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 (9)
1. The connecting structure of the pultruded reinforced FRP pipe comprises an FRP pipe and a flange plate and is characterized in that at least two reinforced ribs are arranged on the inner wall of the FRP pipe, each reinforced rib comprises a cylindrical reinforced rib part and a supporting part arranged between the inner wall of the FRP pipe and the cylindrical reinforced rib part, the axial length of the cylindrical reinforced rib part is greater than that of the supporting part, and at least one end of the cylindrical reinforced rib part is provided with a connecting section extending out of the supporting part;
the flange plate comprises a cylindrical part matched with an inner hole at the end part of the FRP pipe, a flange part which is positioned at one end of the cylindrical part and outwards extends, and a connecting part which is positioned in the other end of the cylindrical part, wherein a first through hole corresponding to the cylindrical reinforcement part is formed in the connecting part;
the connecting portion of the flange plate abuts against the end face of the supporting portion of the reinforcement, each connecting section of the cylindrical reinforcement portion penetrates through the corresponding first through hole, and locking pieces are arranged at the penetrating-out ends of the connecting sections.
2. The connection structure of a pultruded reinforced FRP pipe according to claim 1, characterized in that the flange further includes an annular portion located outside the cylindrical portion and disposed concentrically with the cylindrical portion, the annular portion being fitted with the outer periphery of the FRP pipe end portion.
3. The connection structure of a pultruded reinforced FRP pipe according to claim 1, characterized in that the locking member includes an anchor ring and at least two clips, the anchor ring has a tapered inner hole, the outer surface of the clip is adapted to the shape of the inner hole of the anchor ring, and all the clips enclose an inner cavity for cooperation with the connection section of the cylindrical reinforced portion.
4. A connection structure of a pultruded reinforced FRP pipe according to claim 1, 2 or 3, characterized in that the reinforcement is integrally formed with the FRP pipe by a pultrusion process.
5. The connection structure of a pultruded reinforced FRP pipe according to claim 1, characterized in that a plurality of second through holes are opened on the flange portion of the flange plate.
6. The connection structure of a pultruded reinforced FRP pipe of claim 1 characterized in that the flange is a metal flange.
7. The connection structure of a pultruded reinforced FRP pipe according to claim 1, characterized in that both ends of the cylindrical reinforced portion have the connection sections extending out of the supporting portion; the flange plates are arranged at two ends of the FRP pipe.
8. The connection structure of a pultruded reinforced FRP pipe according to claim 1, characterized in that a lightening hole is provided in the middle of the connection portion.
9. A connection method of pultruded reinforced FRP pipes, characterized in that a connection structure of a pultruded reinforced FRP pipe according to any one of claims 1 to 8 is adopted, comprising the steps of:
integrally forming the FRP pipe and the reinforcement by a pultrusion process, and cutting off at least one end of the reinforcement positioned on the supporting part, so that at least one end of the cylindrical reinforcement part is provided with a connecting section extending out of the supporting part;
the flange plate is assembled, the cylindrical part of the flange plate is matched with an inner hole at the end part of the FRP pipe, the connecting part of the flange plate abuts against the end face of the supporting part of the reinforced bar, the connecting section of each cylindrical reinforced bar part penetrates through the corresponding first through hole, and then the locking piece is arranged at the penetrating end of the connecting section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911117589.2A CN110762312B (en) | 2019-11-15 | 2019-11-15 | Connection structure and connection method of pultruded reinforced FRP pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911117589.2A CN110762312B (en) | 2019-11-15 | 2019-11-15 | Connection structure and connection method of pultruded reinforced FRP pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110762312A CN110762312A (en) | 2020-02-07 |
| CN110762312B true CN110762312B (en) | 2024-03-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911117589.2A Active CN110762312B (en) | 2019-11-15 | 2019-11-15 | Connection structure and connection method of pultruded reinforced FRP pipe |
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| KR20090010241U (en) * | 2008-04-04 | 2009-10-08 | 임병구 | connecting structure for duct |
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| KR20130037383A (en) * | 2011-10-06 | 2013-04-16 | 한국건설기술연구원 | Fiber reinforced plastic suction foundation and construction method |
| KR101324938B1 (en) * | 2013-01-04 | 2013-11-01 | 신이피엔씨 주식회사 | Non-welded pipe joint with flanges |
| KR101716675B1 (en) * | 2016-06-01 | 2017-03-15 | 빌드윈 주식회사 | Connecting Structure of Steel Pipe with the Reinforced Joint and Bridge with the Same |
| CN211059581U (en) * | 2019-11-15 | 2020-07-21 | 中国人民解放军陆军工程大学 | Connecting structure of pultrusion reinforced FRP (fiber reinforced plastic) pipe |
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| JPH11329121A (en) * | 1998-05-19 | 1999-11-30 | Ngk Insulators Ltd | Flange metal fitting structure of polymer insulator tube |
| KR20090010241U (en) * | 2008-04-04 | 2009-10-08 | 임병구 | connecting structure for duct |
| CN102313109A (en) * | 2010-06-30 | 2012-01-11 | 李志雄 | Enhanced thermoplastic composite pipe buckling and pressing joint and buckling and pressing connection method |
| KR20130037383A (en) * | 2011-10-06 | 2013-04-16 | 한국건설기술연구원 | Fiber reinforced plastic suction foundation and construction method |
| KR101324938B1 (en) * | 2013-01-04 | 2013-11-01 | 신이피엔씨 주식회사 | Non-welded pipe joint with flanges |
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| CN110762312A (en) | 2020-02-07 |
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