CN110714960A - Connecting structure and connecting method of FRP (fiber reinforced plastic) pipe - Google Patents
Connecting structure and connecting method of FRP (fiber reinforced plastic) pipe Download PDFInfo
- Publication number
- CN110714960A CN110714960A CN201911117737.0A CN201911117737A CN110714960A CN 110714960 A CN110714960 A CN 110714960A CN 201911117737 A CN201911117737 A CN 201911117737A CN 110714960 A CN110714960 A CN 110714960A
- Authority
- CN
- China
- Prior art keywords
- frp pipe
- explosion
- frp
- flange
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 229920002430 Fibre-reinforced plastic Polymers 0.000 title abstract description 88
- 239000011151 fibre-reinforced plastic Substances 0.000 title abstract description 88
- 238000004880 explosion Methods 0.000 claims abstract description 22
- 230000000149 penetrating effect Effects 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 230000035515 penetration Effects 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract description 6
- 230000009172 bursting Effects 0.000 description 16
- 238000005422 blasting Methods 0.000 description 11
- 230000006872 improvement Effects 0.000 description 10
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 238000004026 adhesive bonding Methods 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
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000003292 glue 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
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
Abstract
The invention discloses a connecting structure and a connecting method of an FRP (fiber reinforced plastic) pipe, belonging to the technical field of composite material connection, wherein the connecting structure of the FRP pipe comprises an FRP pipe and a flange, 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, and each 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 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 FRP pipe connecting method adopts the connecting structure of the FRP pipes. 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
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 technical field of composite material connection, 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 technical field of composite material connection at present and is the 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 FRP pipe is simple in structure and reliable in connection, and bearing capacity of the FRP pipe can be improved.
As a technical concept, the second technical problem to be solved by the present invention is: provided is a method for connecting FRP pipes.
In order to solve the first technical problem, the technical scheme of the invention is as follows: 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.
In order to solve the second technical problem, the technical solution of the present invention is: a connecting method of FRP pipes adopts the connecting structure of the FRP pipes, and comprises the following steps:
and placing the explosion-proof screw rod into the inner cavity formed by enclosing all the explosion-proof wedges, then pushing the explosion-proof screw rod and all the explosion-proof wedges into one end part of the FRP pipe, assembling the flange, enabling the cylindrical part of the flange to be matched with the periphery of the FRP pipe, enabling the flange body to abut against the end surface of the FRP pipe, enabling the thread section of the explosion-proof screw rod to penetrate out of the flange body, and screwing a nut.
As an improvement, 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:
the invention provides a connecting structure and a connecting method of FRP pipes, because of designing a flange, a blasting wedge block, a blasting screw rod and a nut, when in use, the blasting screw rod is placed in an inner cavity formed by enclosing all the blasting wedge blocks, then the blasting screw rod and all the blasting 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 is abutted against the end surface of the FRP pipe, the thread section of the blasting screw rod penetrates out of the flange body, then the nut is screwed, in the process of screwing the nut, along with the gradual tightening of the blasting screw rod, at least two blasting wedges gradually move outwards, the outer surface of the blasting wedge block presses the FRP pipe on the cylindrical part of the flange, and generates enough pressing force, compared with the glue joint in the prior art, the contact area between the blasting wedge block and the cylindrical part and the FRP pipe can be enlarged, 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 connecting structure and the connecting method of the FRP pipe provided by the invention have the advantages that the FRP pipe cannot be damaged, the structure is simple, the connection is reliable, and the bearing capacity of the FRP pipe is improved.
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 structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope covered by the contents disclosed in the present invention.
Fig. 1 is a schematic structural diagram 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 pop wedge;
fig. 6 is a schematic structural view of a connection structure of FRP pipes 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 particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present specification, the terms "front", "rear", "left", "right", "inner", "outer" and "middle" are used for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship between the terms and the corresponding parts are also regarded as the scope of the present invention without substantial changes in the technical contents.
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.
In conclusion, the connection structure and the connection method of the FRP pipes provided by the invention have the advantages that the FRP pipes cannot be damaged, the structure is simple, the connection is reliable, and the bearing capacity of the FRP pipes is improved.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (9)
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.
8. A method for connecting FRP pipes, characterized by adopting the connecting structure of FRP pipes as claimed in any one of claims 1 to 7, comprising the steps of:
and placing the explosion-proof screw rod into the inner cavity formed by enclosing all the explosion-proof wedges, then pushing the explosion-proof screw rod and all the explosion-proof wedges into one end part of the FRP pipe, assembling the flange, enabling the cylindrical part of the flange to be matched with the periphery of the FRP pipe, enabling the flange body to abut against the end surface of the FRP pipe, enabling the thread section of the explosion-proof screw rod to penetrate out of the flange body, and screwing a nut.
9. The method for connecting FRP pipes as claimed in claim 8, further comprising a step of sticking a rubber mat to the cylindrical part before assembling the flanges.
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 true CN110714960A (en) | 2020-01-21 |
| CN110714960B CN110714960B (en) | 2024-03-29 |
Family
ID=69216073
Family Applications (1)
| 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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110714960B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111864630A (en) * | 2020-08-11 | 2020-10-30 | 国网青海省电力公司海西供电公司 | Telescopic insulating operating rod |
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 |
| CN102953862A (en) * | 2011-08-29 | 2013-03-06 | 广西玉柴机器股份有限公司 | Sealing method and sealing device of circular hole of engine |
| CN104141848A (en) * | 2014-07-21 | 2014-11-12 | 张治国 | Hose flange joint method |
| 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 |
| CN102953862A (en) * | 2011-08-29 | 2013-03-06 | 广西玉柴机器股份有限公司 | Sealing method and sealing device of circular hole of engine |
| CN104141848A (en) * | 2014-07-21 | 2014-11-12 | 张治国 | Hose flange joint method |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111864630A (en) * | 2020-08-11 | 2020-10-30 | 国网青海省电力公司海西供电公司 | Telescopic insulating operating rod |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110714960B (en) | 2024-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5543204A (en) | Bi-directionally corrugated sandwich construction | |
| US6743504B1 (en) | Co-cured composite structures and method of making them | |
| US9919489B2 (en) | Open cellular sandwich structure including embedded fasteners | |
| US3638979A (en) | Force-transmitting systems | |
| JPS6054730B2 (en) | Synthetic resin insulator | |
| CN110714960A (en) | Connecting structure and connecting method of FRP (fiber reinforced plastic) pipe | |
| US5786107A (en) | Battery system with a high-thermal-conductivity integral structural support | |
| CN109016697B (en) | Foam-ripple composite lattice metal sandwich conical shell and preparation method thereof | |
| CN211059137U (en) | Connecting structure of FRP (fiber reinforced plastic) pipe | |
| US3881973A (en) | Joint construction and method of fabrication | |
| CN211828886U (en) | Weldless lightweight battery box body | |
| CN111261818A (en) | Weldless lightweight battery box body and manufacturing process thereof | |
| US3725981A (en) | Joint construction and method of fabrication | |
| CN113067084A (en) | Carbon fiber composite material battery shell | |
| CN210216906U (en) | Bending-resistant integrated wallboard | |
| JP7221674B2 (en) | Vibration damping member and method for manufacturing vibration damping member | |
| CN211059136U (en) | Prestressed FRP pipe | |
| CN211059581U (en) | Connecting structure of pultrusion reinforced FRP (fiber reinforced plastic) pipe | |
| CN108194560A (en) | It is oriented to tube-expanding type honeycomb and its manufacturing method | |
| CN210238835U (en) | Integrated wallboard | |
| CN109367042B (en) | Connecting structure of plastic part and metal part and manufacturing method thereof | |
| CN110762312B (en) | Connection structure and connection method of pultruded reinforced FRP pipe | |
| CN110714961A (en) | Prestressed FRP pipe and connecting method | |
| CN219453291U (en) | Carbon fiber tube | |
| CN216553059U (en) | Peripheral fixing device of cylindrical template |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |