CN114542840B - Butt joint structural member used between ports of deformable plastic composite pressure-resistant pipe - Google Patents
Butt joint structural member used between ports of deformable plastic composite pressure-resistant pipe Download PDFInfo
- Publication number
- CN114542840B CN114542840B CN202210167557.9A CN202210167557A CN114542840B CN 114542840 B CN114542840 B CN 114542840B CN 202210167557 A CN202210167557 A CN 202210167557A CN 114542840 B CN114542840 B CN 114542840B
- Authority
- CN
- China
- Prior art keywords
- tightening
- pressure
- pipe
- butt joint
- resistant
- 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.)
- Active
Links
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
- 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
- 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
- F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
- F16L47/08—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket
- F16L47/10—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket the sealing rings being maintained in place by additional means
-
- 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
- F16L47/16—Screw-threaded 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Joints With Sleeves (AREA)
Abstract
The invention discloses a butt joint structural part used between ports of deformable plastic composite pressure-resistant pipes, which comprises an inner supporting connecting pipe sleeved with two groups of elastic sealing rings, a tightening disk with an annular structure and a taper on the inner wall, and tightening plates uniformly surrounding a plurality of blocks at the port parts of the two butt joint pipe, wherein the tightening plates are provided with wedge structures matched with the taper of the inner wall of the tightening disk; the two tightening discs are respectively sleeved at the left end and the right end of the tightening piece in a ring mode, when the two tightening discs move in opposite directions under the action of the axial force of the tightening piece, the tightening piece is used for uniformly extruding the radial shrinkage deformation of the pressure pipe, and then the elastic sealing ring sleeved on the inner supporting guide connecting pipe is extruded to deform, so that the butt joint of the ports of the pressure pipe is prevented from being pulled and sealed. The invention can realize more stable and convenient detachable butt joint, can enhance the drawing resistance and sealing performance of the butt joint port part of the pipeline, has the advantages of easy production and manufacture of all parts used by the structural member, controllable cost and wide market prospect and great economic value.
Description
Technical Field
The invention relates to a pipeline butt joint technology, in particular to a port butt joint technology of a plastic composite pressure-resistant pipe capable of deforming under the action of external pressure, and particularly relates to a butt joint structural member between ports of the pipeline.
Background
As a pressure-resistant pipe for transmitting high-pressure fluid (oil, gas, water, etc.), a plastic composite pressure-resistant pipe is a low-cost main pipe with corrosion resistance, and a plastic composite pipe is a pipe which is formed by compounding various materials capable of enhancing the strength of the pipe into plastic to enhance the pressure resistance of the pipe, wherein the composite pipe simultaneously has the radial deformation compression performance under the action of external pressure.
In the construction of the pipeline, the pipelines are required to be connected on site, namely the ports of the pipelines are in butt joint, and the quality of the butt joint directly influences the overall pressure resistance and durability of the pipeline; because the port of the plastic composite pressure-resistant pipe is exposed with an unprotected composite layer, if the port is contacted with high-pressure fluid, the pipe body structure is extremely easy to damage, the pressure-resistant and corrosion-resistant performance, the service life and the like of the pipe body are damaged, and the problems of leakage and the like of the pipe in actual application are also often caused at the butt joint part; in addition, the convenience and the detachability of the butt joint have direct key effects on the construction cost and the efficiency of the pipeline.
For a plastic composite pressure-resistant pipe, one of the traditional butt joint technologies is to seal the port of the composite pipe by using electric heating melting plastic on a construction site, then sleeve two pipe ports by using a plastic sleeve with an electric melting heating wire on the inner wall, and realize connection by electric welding the inner wall of the plastic sleeve and the outer walls of the two pipes by using the electric melting heating wire.
Therefore, there are also many techniques in the prior art for butting with a connector and a sealing ring, such as: the pipeline quick connecting device with the bulletin number of CN2502104Y, the multipurpose pressure pipeline connecting piece with the bulletin number of CN2475907Y, the plastic pipeline bidirectional socket connecting device with the bulletin number of CN2685691Y, the flexible coincidence connecting pipe fitting for the large-caliber plastic pipeline with the application publication number of CN102102787A, the novel connecting mode of the steel wire mesh skeleton plastic composite pipeline with the application publication number of CN102644823A and the like. However, these connection methods still fail to comprehensively and well solve the technical problems of uniform radial stress of the pipe, dispersing friction force generating drawing force, providing stronger tensile and sealing properties, lower production cost, being more convenient for construction and installation, and the like. The invention is based on the above, and provides a comprehensive and innovative docking scheme in a targeted manner so as to obtain a better docking effect.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a butt joint structural part for the ports of the deformable plastic composite pressure-resistant pipe, so as to realize more stable and convenient detachable butt joint and enhance the drawing resistance and sealing performance of the butt joint port part of the pipe.
In order to achieve the technical purpose, the scheme of the invention is as follows: a butt joint structural member for use between ports of a deformable plastic composite pressure-resistant pipe, the pressure-resistant pipe being usable for conveying high-pressure fluid and having a flat wall on an outer wall of the pipe at the port portion thereof, comprising: the inner supporting guide connecting pipe is a metal thin-wall special pipe, the maximum outer diameter of the left end and the right end of the inner supporting guide connecting pipe is matched with the inner diameter of the pressure-resistant pipe, and the inner supporting guide connecting pipe can be respectively plugged into two pressure-resistant pipe ports in butt joint for conducting connection between the pressure-resistant pipes and is used for fixing and supporting an elastic sealing ring; the two groups of elastic sealing rings are respectively sleeved at the left end and the right end of the inner supporting guide connecting pipe in a ring mode and used for preventing high-pressure fluid from flowing out from between the inner wall of the pressure-resistant pipe and the outer wall of the inner supporting guide connecting pipe; the two tightening discs are of annular structures, and the inner walls of the two tightening discs are provided with conicity; the outer surfaces of the left end and the right end of each tightening piece are respectively provided with a wedge-shaped structure matched with the taper of the inner wall of the tightening disk, the length of each tightening piece simultaneously covers all elastic sealing rings sleeved on the inner supporting guide connecting pipe, and the cross section of each tightening piece is in an arc shape; the tightening member is used for applying axial force to enable the two tightening discs to move towards each other; the plurality of tightening plates are used for uniformly surrounding and coating the outer walls of the port parts of the two butt-joint pressure-resistant pipes, the two tightening plates are respectively sleeved at the left end and the right end of the tightening plates in a ring mode, and when the two tightening plates move in opposite directions under the axial force action of the tightening members, the pressure-resistant pipes are uniformly extruded by the tightening plates to enable the pressure-resistant pipes to radially shrink and deform so as to extrude the elastic sealing rings to deform, so that the butt-joint drawing resistance and sealing between the ports of the pressure-resistant pipes are realized.
In order to ensure the sealing performance, the elastic sealing ring can obtain uniform and sufficient compression ratio, as a further improvement, the inner surface of the tightening piece is provided with a ring convex part corresponding to the installation part of the elastic sealing ring, a plurality of mutually parallel inward grooves are uniformly formed on the inner surface of the tightening piece along the axial direction, and outward grooves are formed in the middle part of the outer surface part of the tightening piece corresponding to the adjacent inward grooves, and the outward grooves and the inward grooves are mutually spaced and mutually parallel.
As a further improvement, the central part of the inner supporting guide connecting pipe is provided with an annular limiting convex part, the left end and the right end of the inner supporting guide connecting pipe are respectively provided with an inner concave ring groove used for sleeving an elastic sealing ring, and the maximum outer diameter formed by sleeving the elastic sealing ring on the inner concave ring grooves is smaller than the inner diameter of the pressure-resistant pipe; when the butt joint structural part is assembled, the inner concave ring groove, the elastic sealing ring and the ring convex part on the tightening piece which are mutually corresponding on the same side are positioned at the same cross section.
For the purpose of quick, efficient and accurate construction and installation, preferably, the outer surface of the tightening plate is also provided with a positioning long groove, the inner wall of the tightening plate is provided with a plurality of positioning convex blocks which are uniformly distributed in the radial direction, each positioning convex block is matched with the positioning long groove of the corresponding tightening plate, and the positioning convex blocks can axially move in the positioning long groove along with the axial tightening and displacement of the tightening plate.
In order to improve the pulling-out resistance effect, preferentially, the tightening piece compresses the inner surface of the deformable plastic composite pressure-resistant pipe and is also provided with a friction enhancing structure.
Preferably, the number of the tightening plates is six, each tightening plate is provided with three outward grooves and four inward grooves, one outward groove is arranged on the axial center line of the tightening plate and used as a positioning long groove, and six positioning convex blocks are correspondingly arranged on the tightening plate and respectively correspond to the six positioning long grooves.
In order to enhance the drawing resistance, as a further improvement, two sides of an inner concave ring groove which is arranged at the left end and the right end of the inner supporting guide connecting pipe and is used for sleeving the elastic sealing ring are provided with tensile enhancement inclined sinking surfaces, and the inner surface of the tightening piece is provided with a tensile enhancement inclined convex surface matched with the tensile enhancement inclined sinking surface at the position corresponding to the tensile enhancement inclined sinking surface.
For the quick fixed mounting position who confirms the tensioning sheet of the site operation of being convenient for, as the preferred, the internal surface middle part position of tensioning sheet constructs and is equipped with the installation location bulge loop, the axial cross-section width of bulge loop with the spacing outer convex axial cross-section width matches on the internal stay lead pipe, the tensioning sheet is bilateral symmetry structure with the installation location bulge loop as the center.
Preferably, the inner support guide connecting pipe is formed by water expansion of a stainless steel pipe, and is of a bilateral symmetry structure with the limit convex as the center.
Preferably, the tightening members are a plurality of tightening bolts, and the tightening discs are uniformly provided with axial bolt holes.
Preferably, the axial bolt holes on the tightening disk are round through holes and bolt countersunk holes which are distributed at intervals.
The beneficial effects of the invention are as follows:
firstly, radial shrinkage deformation of the uniformly extruded pipe can be ensured by uniformly distributing a plurality of tightening sheets, so that the elastic sealing ring can be uniformly compressed, the whole ring is ensured to have no sealing weak part, and stable pressure resistance of butt joint is realized; particularly, the inner surface and the outer surface of each tightening piece are uniformly provided with the axial inward grooves and the axial outward grooves, so that the cross section of the tightening piece is corrugated, the curvature of the tightening piece is changed along with radial shrinkage deformation of the pipe when the tightening piece is extruded, and the radial uniform stress of the pipe is effectively ensured;
the scheme can lead the two sections of pressure-resistant pipes to generate strong friction force on the inner wall and the outer wall of the pressure-resistant pipes and obtain the pulling-resistant effect according to the strong friction force, compared with the mode of connection only by the outer wall, the scheme not only greatly enhances the tensile resistance of the butt joint ports and improves the pressure-resistant performance, but also effectively distributes the surface friction force for providing the tensile resistance, thereby being beneficial to prolonging the service life of the ports of the pipes;
compared with the traditional bonding or welding butt joint technology, the scheme has detachability, is particularly convenient to maintain, and can improve the tightness by further compressing the elastic sealing ring only by fastening the axial bolts when leakage occurs at the butt joint;
the radial extrusion force generated by the axial movement of the tightening disk and the tightening sheet on the pressure-resistant pipe is only generated during the butt joint, so that the rotary shearing force relative to the pressure-resistant pipe is not generated, and the shearing damage to the pipeline is effectively avoided;
fifthly, the inner support guide connecting pipe enables the port of the pressure-resistant pipe to be completely isolated from high-pressure fluid transmitted in the pipe, so that the weakest part of the composite pipe is effectively protected, and the stable pressure resistance of butt joint is ensured;
in summary, the invention can realize more stable and convenient detachable butt joint between the ports of the deformable plastic composite pressure-resistant pipe, can enhance the drawing resistance and sealing performance of the butt joint port part of the pipeline, and has the advantages of easy production and manufacture of all parts used by structural members, controllable cost, wide market prospect and great economic value.
Drawings
FIG. 1 is an axial cross-sectional view of a preferred embodiment of the present invention after docking;
FIG. 2 is a perspective view of the preferred embodiment of the present invention after docking;
FIG. 3 is an exploded view in axial section of the preferred embodiment of the present invention after docking;
FIG. 4 is an enlarged cross-sectional view of the support catheter at location A of FIG. 3;
FIG. 5 is a perspective view of a support catheter in accordance with a preferred embodiment of the present invention;
FIG. 6 is a perspective view of the top surface of the cinch tab in a preferred embodiment of the present invention;
FIG. 7 is a cross-sectional view of a cinch tab in a preferred embodiment of the invention;
FIG. 8 is a longitudinal cross-sectional view of a cinch tab in a preferred embodiment of the invention;
FIG. 9 is a perspective view of the lower surface of the cinch tab in a preferred embodiment of the present invention;
FIG. 10 is a perspective view of the primary view of the take-up disc in the preferred embodiment of the present invention;
FIG. 11 is a perspective view from the viewing angle behind of the take-up disc in the preferred embodiment of the present invention;
FIG. 12 is a cross-sectional view of a take-up reel in a preferred embodiment of the present invention;
fig. 13 is a cross-sectional view taken along the K-K plane in fig. 12.
Wherein:
10 is a tightening sheet, 11 is an inward groove, 12 is an outward groove, 13 is a positioning long groove, 14 is a mounting positioning convex ring, 15 is a ring convex part, 16 is a tensile enhancement oblique convex surface, 17 is a friction enhancement structure, and 18 is a wedge structure;
20 is a supporting connecting pipe, 21 is an inner concave ring groove, 22 is a first tensile enhancement inclined sinking surface, 23 is a second tensile enhancement inclined sinking surface, and 24 is a limit convex;
30 is a pressure-resistant pipe;
40 is a tightening disc, 41 is a taper inner wall, 42 is a positioning lug, 43 is an axial bolt hole, 431 is a round through hole, 432 is a bolt countersink;
50 is an elastic sealing ring;
and 60 is a tension bolt.
Description of the embodiments
The invention is further illustrated in the following, in conjunction with the accompanying drawings and examples. In the following detailed description, certain exemplary preferred embodiments of the present invention are described by way of illustration only. It is needless to say that the person skilled in the art realizes that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive in scope.
The deformable plastic composite pressure-resistant pipe is mainly made of plastic, can be PE, PP, composite plastic and the like, and can be made of composite high-strength materials (such as steel wires, glass fibers and the like) under the condition that the pipe wall thickness of the plastic pipe is not required to be increased in order to enhance the mechanical strength of the plastic, so that the internal pressure resistance of the pipe is greatly improved, and the plastic pipe can be suitable for more Gao Naya corrosion-resistant application scenes; the outer wall of the port part of the pressure-resistant pipe is a flat wall, which means that the inner wall and the outer wall of a section of pipeline of the pressure-resistant pipe at least at the butt joint port of the pressure-resistant pipe are smooth flat walls and have no ripple; the pressure-resistant pipe can be used for conveying high-pressure fluid, can bear extremely high internal pressure, has extremely strong drawing resistance, and cannot cause axial drawing crack of the pipe body due to the internal pressure; deformable refers to the fact that the plastic composite pressure-resistant pipe has the performance of being capable of radially deforming and compressing under the action of external pressure, and has certain flexibility, but is not a rigid physical structure which cannot be contracted at all; the butt joint structural part of the invention is an innovative connection scheme based on the deformation characteristics of the pipes, in other words, the scheme is not suitable for rigid pipes which cannot be deformed radially.
As shown in fig. 1, 2 and 3, the butt-joint structural member for the ports of the deformable plastic composite pressure-resistant pipe of the present invention is used for connecting the port portions of two identical pressure-resistant pipes 30, and needs to ensure the pressure-resistant performance of the connection portions, has high pull-out resistance and can effectively prevent leakage, and the butt-joint structural member at least comprises the following components:
the butt joint structural part comprises an inner supporting connecting pipe 20 which is a metal thin-wall special pipe, the maximum outer diameters of the left end and the right end of the inner supporting connecting pipe 20 are matched with the inner diameters of the pressure-resistant pipes, and the inner supporting connecting pipe can be respectively plugged into the ports of the two pressure-resistant pipes 30 in butt joint for conducting connection between the pressure-resistant pipes, and high-pressure fluid completely passes through the inner supporting connecting pipe when flowing through the butt joint position, so that the butt joint ports of the pressure-resistant pipes 30 are completely isolated from the high-pressure fluid, and the weak part is effectively protected; moreover, the inner support guide tube 20 is also used to secure and support the elastic sealing ring 50; in a preferred embodiment, the inner support connecting tube 20 may be formed by water expansion of a stainless steel tube;
the butt joint structural part comprises two groups of elastic sealing rings 50 which are respectively sleeved at the left end and the right end of the inner support guide connecting pipe 20 and used for preventing high-pressure fluid from flowing out from between the inner wall of the pressure-resistant pipe and the outer wall of the inner support guide connecting pipe;
the butt joint structural part also comprises two tightening discs 40, as shown in fig. 10, 11, 12 and 13, wherein the tightening discs 40 are of annular structures, and the inner wall of each tightening disc is tapered (i.e. horn-shaped); in addition, the butt-joint structural part further comprises a tightening member, wherein the tightening member is used for applying axial force to the two tightening discs 40, so that the two tightening discs 40 can move towards each other to form extrusion force together with a tightening sheet 10 described below; the tightening member may be a hydraulic clamp or a clamping device, but preferably adopts a plurality (a plurality) of tightening bolts 60, and at this time, the tightening disc 40 is uniformly provided with axial bolt holes 43; the tension bolts 60 are matched with the axial bolt holes 43 to realize the opposite movement of the two tightening discs 40;
the butt joint structural part also comprises a plurality of (a plurality of) tightening plates 10 which are respectively and independently separated, wherein the outer surfaces of the left end and the right end of each tightening plate 10 are respectively provided with a wedge-shaped structure matched with the taper of the inner wall of the tightening plate, and the structure can convert axial force into radial force so that the action of tightening the tightening bolt 60 is converted into the extrusion action of the tightening plate on the tightening plate 10; in order to ensure that the compression of the tightening piece 10 is transferred to the elastic sealing ring 50 through the radial deformation of the pipe wall of the pressure-resistant pipe, the length of the tightening piece 10 simultaneously covers all the elastic sealing rings 50 sleeved on the inner support guide connecting pipe 20, so that the elastic sealing rings 50 can be fully compressed, and the sealing performance is improved along with the improvement of the compression ratio of the elastic sealing rings 50; in addition, in order to make the tightening tab 10 sufficiently and uniformly transmit the extrusion force to the pressure-resistant pipe, and also to increase the friction force between the pressure-resistant pipe wall and the tightening tab 10 (in order to increase the axial pulling force resistance), the cross section of the tightening tab 10 is curved, preferably matched with the curvature of the pressure-resistant pipe wall, so as to form a tight fit between the lower surface of the tightening tab and the pressure-resistant pipe wall;
during assembly, as shown in fig. 1, 2 and 3, two groups of elastic sealing rings 50 are sleeved at the left end and the right end of the inner support guide connecting pipe 20 respectively, and then the two ends of the inner support guide connecting pipe 20 are inserted into the ports of two pressure-resistant pipes to be butted respectively; further, the plurality of tightening tabs 10 are uniformly wrapped around the outer walls of the port parts of the two pairs of pressure-resistant pipes, and the ports are wrapped in a circular ring formed by the tightening tabs 10; simultaneously, the two tightening discs 40 are respectively sleeved at the left end and the right end of the tightening sheet 10 in a ring mode, the two tightening discs 40 move in opposite directions under the action of axial force generated by tightening of the tightening bolts 60, the axial force is converted into radial pressure under the action of the tapered inner wall of the tightening discs and the wedge-shaped structure of the tightening sheet, the radial pressure uniformly presses the wall of the pressure-resistant pipe through the tightening sheet 10, the pressure-resistant pipe is forced to radially shrink and deform at the position of the tightening sheet, and then the elastic sealing ring 50 is pressed to achieve a certain compression ratio so as to realize butt joint sealing between ports of the pressure-resistant pipe; simultaneously, because of the friction force between the tightening piece 10 and the outer wall of the pressure-resistant pipe 30 caused by extrusion and the friction force between the inner support guide connecting pipe 20 and the inner wall of the pressure-resistant pipe 30, the two pressure-resistant pipes are axially locked and have strong pull-out resistance.
The inventor finds that, in the long-term experimental test process, the elastic sealing ring 50 is used as a critical part of whether the sealing performance is stable or not, so that it is the most important factor to ensure that the elastic sealing ring 50 obtains a uniform and sufficient compression ratio, and if the compression ratio of the elastic sealing ring 50 on a certain arc section of the whole ring is insufficient due to uneven compression, the arc section is extremely easy to leak high-pressure fluid. Therefore, in order to ensure sealing performance, it is necessary to ensure that the elastic seal ring 50 can obtain a uniform and sufficient compression ratio, and therefore, the design of the tightening tab that provides a radial pressing force to the elastic seal ring 50 is very important. In order to secure a sufficient compression ratio, the inner surface of the tightening tab 10 has a ring protrusion 15 at a mounting portion corresponding to the elastic seal ring 50, and the deformation amount of the corresponding portion can be increased; in order to ensure more uniform extrusion, besides the arc-shaped cross section design of the tightening piece 10 which is separately and independently configured to be in line with the curvature of the wall of the pressure-resistant pipe, the curvature change of the pressure-resistant pipe which is generated when the pressure-resistant pipe is radially contracted and deformed is considered, therefore, the tightening piece 10 needs to be configured into a structure which can be radially changed along with the curvature without affecting the axial rigidity of the tightening piece, the invention provides a related structure, namely, a plurality of mutually parallel inward grooves 11 are uniformly configured on the inner surface of the tightening piece 10 along the axial direction, and outward grooves 12 are formed in the middle part of the outer surface part of the tightening piece 10 corresponding to the adjacent inward grooves, as shown in fig. 6, 7 and 9, the outward grooves 12 and the inward grooves 11 are mutually spaced and mutually parallel, so that the cross section of the tightening piece 10 is corrugated, and the curvature of the tightening piece 10 can be changed along with the radial contraction and deformation of the pressure-resistant pipe 30 when the tightening piece 10 is extruded by the tightening disk 40, thereby effectively ensuring uniform radial stress of the pipe. The advantage of this construction is that it ensures uniform radial contraction deformation of the extruded tube, enables the elastic sealing ring to be uniformly compressed, ensures no sealing weak portion of the whole ring of the elastic sealing ring 50, and realizes stable pressure resistance of butt joint.
In the preferred embodiment, in order to facilitate the worker to conveniently determine the depth of the inner support guide connecting tube 20 inserted into the pressure-resistant tube 30 during the butt joint construction, an annular limiting convex 24 is formed at the central part of the inner support guide connecting tube 20, the maximum outer diameter of the limiting convex is larger than the inner diameter of the butt joint port part of the pressure-resistant tube 30, and the worker only needs to insert any side of the inner support guide connecting tube 20 into the pressure-resistant tube port until the inner support guide connecting tube is propped by the limiting convex 24 during the operation, so that the positioning alignment during the construction is greatly facilitated.
The inner supporting guide connecting pipe 20 is located at two sides of the limiting outer protrusion 24 (namely, the left end and the right end of the inner supporting guide connecting pipe), the inner concave ring grooves 21 used for sleeving the elastic sealing rings 50 are respectively formed, as shown in fig. 4 and 5, the maximum outer diameter formed after the elastic sealing rings 50 are sleeved in the inner concave ring grooves 21 is smaller than the inner diameter of the pressure-resistant pipe 30, so that the sleeved elastic sealing rings 50 can be smoothly plugged into the pipe from the pressure-resistant pipe port, the elastic sealing rings 50 cannot be blocked from being plugged into or scratched by the pressure-resistant pipe port, the elastic sealing rings can be protected from being damaged, the pressed sealing of the elastic sealing rings is completed completely in the later pressed deformation. It is also based on this that the elastic sealing ring 50 needs to be compressed to achieve sealing by pressing, so that the inner concave ring groove 21, the elastic sealing ring 50 and the ring convex part 15 on the tightening piece corresponding to each other on the same side are located at the same cross section when the abutting structural member is assembled, that is, as shown in fig. 1, the ring convex part 15 presses the deformation inner convex part of the pressure-resistant pipe wall, and then presses the elastic sealing ring 50 located in the inner concave ring groove 21 to achieve a certain compression ratio, and in the best implementation case, the elastic sealing ring 50 should be compressed to 2/3 of the original thickness, and of course, the specific compression ratio is determined according to the high pressure of fluid actually required to be born by the pressure-resistant pipe, and the compression ratio of the elastic sealing ring 50 can be adjusted by tightening the bolt 60.
In addition, because the tightening tabs 10 are independent blocks, for quick, efficient and accurate surrounding assembly on the outer wall of the pressure pipe, as shown in fig. 6, 7, 10 and 11, preferably, a positioning long groove 13 is further configured on the outer surface of the tightening tab 10, and a plurality of positioning convex blocks 42 uniformly distributed in the radial direction are configured on the tightening disk 40, each positioning convex block 42 is matched with the positioning long groove 40 of the corresponding tightening tab, and the positioning convex blocks 42 can axially move in the positioning long groove 13. This structure can let construction worker can be very convenient accurate utilize tightening disk 40 to encircle the location to a plurality of tightener pieces, assemble fast. In a more preferred embodiment, in order to facilitate the positioning assembly of the tightening tab in the axial direction of the pipe wall, a mounting positioning convex ring 14 is configured in the middle of the inner surface of the tightening tab 10, as shown in fig. 8, the axial cross-sectional width of the mounting positioning convex ring 14 is matched with the axial cross-sectional width of the limiting convex 24 on the inner support guide pipe 20, and the tightening tab 10 has a bilateral symmetry structure with the mounting positioning convex ring 14 as the center. The structure can skillfully use a gap formed by the space between two pressure-resistant pipe ports (determined by the axial section width of the limiting convex 24), and is used as a positioning structure of the tightening piece 10 on the axial pipe wall of the pressure-resistant pipe, when in installation, a worker only needs to clamp the installation positioning convex ring 14 in the middle of the tightening piece 10 into an annular gap formed between the two pressure-resistant pipe ports, namely, the axial arrangement position of the tightening piece 10 is determined, and then the radial arrangement positions of the tightening pieces 10 are determined by the positioning convex blocks 42 on the tightening disk, so that the assembly of a plurality of tightening pieces 10 can be simply and accurately completed.
To increase the pull-out resistance of the pipe interface, it is necessary to increase the friction of the connection with the pipe contact, sufficient friction being able to prevent the two pipes being connected from being pulled apart by the high pressure fluid, so that in the preferred embodiment, as shown in fig. 7, 8 and 9, friction enhancing structures 19 are also provided on the inner surface of the tightening tab 10, which may be any known structures, such as teeth.
In order to further obtain a greater enhanced pulling-resistant force, as a further improvement, a first tensile-enhancing inclined-sinking surface 22 and a first tensile-enhancing inclined-sinking surface 23 are formed on both sides of the inner concave groove 21 of the inner supporting guide tube 20, as shown in fig. 4 and 5, and correspondingly, the inner surface of the tightening piece 10 has a matched tensile-enhancing inclined convex surface 16 at a position corresponding to the tensile-enhancing inclined-sinking surface, as shown in fig. 8. This design has the following beneficial effects: the two sides of the inner concave ring groove 21 are provided with the tensile enhancement inclined sinking surfaces 22 and 23, and the tensile enhancement inclined convex surfaces 16 of the tightening sheets are matched to squeeze the wall of the pressure-resistant pipe radially and tightly, so that the wall of the pressure-resistant pipe is uniformly protruded inwards, the formed concave-convex matching structure is beneficial to greatly improving the bonding strength between the inner wall of the pressure-resistant pipe and the inner supporting connecting pipe 20, and the tensile pulling resistance of the connection can be greatly improved; and two sides of the inner concave ring groove 21 are provided with tensile enhancement inclined sinking surfaces, so that the compression of the pressure-resistant pipe wall towards the elastic sealing ring 50 can apply force more uniformly and widely in the axial direction, the inner convex part of the pipe wall is beneficial to form a gentle but not sharp physical structure, the inner convex part of the pipe wall is easy to form optimal surface contact (but not point contact) with the elastic sealing ring, and a better sealing effect is achieved.
As a preferred embodiment, the tightening tabs 10 are provided in six, each tightening tab is provided with three outward slots 12 and four inward slots 11, one outward slot 12 is configured at the axial center line of the tightening tab and is used as the positioning slot 13, and the corresponding six positioning protrusions 42 on the tightening disk 40 are respectively corresponding to the six positioning slots of the six tightening tabs. Of course, when the scheme of the invention is applied, the quantity can be adjusted and optimized according to specific situations.
In order to facilitate the screwing of the tension bolt 60 and the uniform force application at the two ends, the axial bolt holes on the tightening disk 40 are designed as round through holes 431 and bolt countersunk holes 432 which are distributed at intervals, as shown in fig. 11 and 12.
The foregoing has shown and described the basic principles, main features and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A butt joint structural member for use between ports of a deformable plastic composite pressure-resistant pipe, said pressure-resistant pipe being usable for conveying high-pressure fluid and having a flat wall on an outer wall of the pipe at the port portion thereof, comprising:
the inner supporting guide connecting pipe is a metal thin-wall special pipe, the maximum outer diameter of the left end and the right end of the inner supporting guide connecting pipe is matched with the inner diameter of the pressure-resistant pipe, and the inner supporting guide connecting pipe can be respectively plugged into two pressure-resistant pipe ports in butt joint for conducting connection between the pressure-resistant pipes and is used for fixing and supporting an elastic sealing ring;
the two groups of elastic sealing rings are respectively sleeved at the left end and the right end of the inner supporting guide connecting pipe in a ring mode and used for preventing high-pressure fluid from flowing out from between the inner wall of the pressure-resistant pipe and the outer wall of the inner supporting guide connecting pipe;
the two tightening discs are of annular structures, and the inner walls of the two tightening discs are provided with conicity;
the outer surfaces of the left end and the right end of each tightening piece are respectively provided with a wedge-shaped structure matched with the taper of the inner wall of the tightening disk, the length of each tightening piece simultaneously covers all elastic sealing rings sleeved on the inner supporting guide connecting pipe, and the cross section of each tightening piece is in an arc shape; the inner surface of the tightening piece is provided with a ring convex part corresponding to the installation part of the elastic sealing ring on the inner supporting guide pipe, a plurality of mutually parallel inward grooves are uniformly formed in the inner surface of the tightening piece along the axial direction, outward grooves are formed in the middle part of the outer surface part of the tightening piece corresponding to the adjacent inward grooves, and the outward grooves and the inward grooves are mutually spaced and mutually parallel;
the tightening member is used for applying axial force to enable the two tightening discs to move towards each other;
the plurality of tightening plates are used for uniformly encircling and wrapping the outer walls of the port parts of the two butt-joint pressure-resistant pipes, the two tightening plates are respectively sleeved at the left end and the right end of the tightening plates in a ring mode, when the two tightening plates move in opposite directions under the action of the axial force of the tightening members, the pressure-resistant pipes are uniformly extruded by the tightening plates to enable the pressure-resistant pipes to radially shrink and deform, and then elastic sealing rings sleeved on the inner supporting connecting pipes are extruded and deformed, so that the butt-joint drawing resistance and sealing between the ports of the pressure-resistant pipes are realized.
2. The butt joint structural part according to claim 1, wherein the central part of the inner supporting guide connecting pipe is provided with an annular limiting convex, the left end and the right end of the inner supporting guide connecting pipe are respectively provided with an inner concave ring groove used for sleeving an elastic sealing ring, and the maximum outer diameter formed by sleeving the elastic sealing ring on the inner concave ring grooves is smaller than the inner diameter of the pressure-resistant pipe; when the butt joint structural part is assembled, the inner concave ring groove, the elastic sealing ring and the ring convex part on the tightening piece which are mutually corresponding on the same side are positioned at the same cross section.
3. The abutting structural member according to claim 1, wherein the outer surface of the tightening piece is further provided with a positioning elongated slot, the inner wall of the tightening piece is provided with a plurality of positioning convex blocks which are uniformly distributed in the radial direction, each positioning convex block is matched with the positioning elongated slot of the corresponding tightening piece, and the positioning convex blocks can axially move in the positioning elongated slot along with the axial tightening and displacement of the tightening piece.
4. The interfacing structure of claim 1, wherein the tightening tab compresses the inner surface of the deformable plastic composite pressure tube with a friction enhancing structure.
5. The butt-joint structural part according to claim 4, wherein the number of the tightening plates is six, three outward grooves and four inward grooves are formed in each tightening plate, one outward groove is formed in the axial center line position of the tightening plate and serves as a positioning long groove, and six positioning convex blocks are correspondingly arranged on the tightening plate and respectively correspond to the six positioning long grooves.
6. A butt-joint structural member according to claim 2, wherein the inner concave groove has a tensile-reinforcing inclined plane on both sides thereof, and the inner surface of the tightening tab has a tensile-reinforcing inclined convex surface matching the tensile-reinforcing inclined plane at a position corresponding to the tensile-reinforcing inclined plane.
7. The butt joint structural part according to claim 2, wherein the middle position of the inner surface of the tightening piece is provided with a mounting and positioning convex ring, the axial section width of the convex ring is matched with the axial section width of the upper limit convex part of the inner support guide connecting pipe, and the tightening piece takes the mounting and positioning convex ring as a center to form a bilateral symmetry structure.
8. The butt joint structural part according to any one of claims 2 to 7, wherein the inner supporting connecting pipe is formed by water expansion of a stainless steel pipe, and has a bilateral symmetry structure with a limit outer protrusion as a center.
9. A docking structure according to any one of claims 1 to 7 wherein the tightening member is a plurality of tightening bolts, and the tightening discs are provided with axial bolt holes.
10. The abutting structural member of claim 9, wherein the axial bolt holes in the tightening disk are spaced apart circular through holes and bolt countersinks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210167557.9A CN114542840B (en) | 2022-02-23 | 2022-02-23 | Butt joint structural member used between ports of deformable plastic composite pressure-resistant pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210167557.9A CN114542840B (en) | 2022-02-23 | 2022-02-23 | Butt joint structural member used between ports of deformable plastic composite pressure-resistant pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114542840A CN114542840A (en) | 2022-05-27 |
| CN114542840B true CN114542840B (en) | 2023-06-02 |
Family
ID=81676998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210167557.9A Active CN114542840B (en) | 2022-02-23 | 2022-02-23 | Butt joint structural member used between ports of deformable plastic composite pressure-resistant pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114542840B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB738934A (en) * | 1953-10-12 | 1955-10-19 | Lewis Mervyn Cecil Seamark | Improvements relating to pipe couplings |
| DE1915754U (en) * | 1965-02-12 | 1965-05-13 | Alfred Hild | PIPE WITH COUPLING OR TANK CONNECTING SLEEVE, IN PARTICULAR FOR HEATING TANK SYSTEMS. |
| GB1268039A (en) * | 1969-11-05 | 1972-03-22 | Mueller Co | Joint for plastics pipe |
| GB1520390A (en) * | 1976-07-08 | 1978-08-09 | Centaurus Ag | Pipe connections |
| US4702498A (en) * | 1985-10-31 | 1987-10-27 | Georg Fischer Aktiengesellschaft | Flange connection for fiber-reinforced plastic pipe pieces |
| GB9126672D0 (en) * | 1990-12-22 | 1992-02-12 | Peart E & Co Ltd | A pipe coupling |
| CN205226691U (en) * | 2015-11-03 | 2016-05-11 | 四川鑫元通钢塑管业有限公司 | On --spot flange joint lining plastic steel pipe's of engineering plastics bush structure |
| CN106461132A (en) * | 2014-04-08 | 2017-02-22 | 奥丁连接股份公司 | Method for connecting a coupling device to respective ends of two pipes, and structure of said coupling device |
| CN106439355A (en) * | 2016-12-07 | 2017-02-22 | 辽宁工程技术大学 | Device used for connecting large pipe diameter ultra-high molecular weight polyethylene pipes for coal mine ventilation |
| CN107631118A (en) * | 2017-10-30 | 2018-01-26 | 中国石油天然气集团公司管材研究所 | A kind of thermoplastic composite plastic tube and preparation method of band sealing buckle press joint |
| CN207514474U (en) * | 2017-12-01 | 2018-06-19 | 天津中瑞邦络克管道联接技术有限公司 | A kind of joint for plastic pipe |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3021026B1 (en) * | 2014-11-12 | 2018-07-11 | Pipelife Nederland B.V. | High pressure pipe coupling construction |
-
2022
- 2022-02-23 CN CN202210167557.9A patent/CN114542840B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB738934A (en) * | 1953-10-12 | 1955-10-19 | Lewis Mervyn Cecil Seamark | Improvements relating to pipe couplings |
| DE1915754U (en) * | 1965-02-12 | 1965-05-13 | Alfred Hild | PIPE WITH COUPLING OR TANK CONNECTING SLEEVE, IN PARTICULAR FOR HEATING TANK SYSTEMS. |
| GB1268039A (en) * | 1969-11-05 | 1972-03-22 | Mueller Co | Joint for plastics pipe |
| GB1520390A (en) * | 1976-07-08 | 1978-08-09 | Centaurus Ag | Pipe connections |
| US4702498A (en) * | 1985-10-31 | 1987-10-27 | Georg Fischer Aktiengesellschaft | Flange connection for fiber-reinforced plastic pipe pieces |
| IE914483A1 (en) * | 1990-12-22 | 1992-07-01 | Peart And Company Ltd E | A pipe coupling |
| GB9126672D0 (en) * | 1990-12-22 | 1992-02-12 | Peart E & Co Ltd | A pipe coupling |
| EP0492921A2 (en) * | 1990-12-22 | 1992-07-01 | E. PEART & COMPANY LIMITED | A pipe coupling |
| CN106461132A (en) * | 2014-04-08 | 2017-02-22 | 奥丁连接股份公司 | Method for connecting a coupling device to respective ends of two pipes, and structure of said coupling device |
| CN205226691U (en) * | 2015-11-03 | 2016-05-11 | 四川鑫元通钢塑管业有限公司 | On --spot flange joint lining plastic steel pipe's of engineering plastics bush structure |
| CN106439355A (en) * | 2016-12-07 | 2017-02-22 | 辽宁工程技术大学 | Device used for connecting large pipe diameter ultra-high molecular weight polyethylene pipes for coal mine ventilation |
| CN107631118A (en) * | 2017-10-30 | 2018-01-26 | 中国石油天然气集团公司管材研究所 | A kind of thermoplastic composite plastic tube and preparation method of band sealing buckle press joint |
| CN207514474U (en) * | 2017-12-01 | 2018-06-19 | 天津中瑞邦络克管道联接技术有限公司 | A kind of joint for plastic pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114542840A (en) | 2022-05-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US12129941B2 (en) | Coupling having arcuate stiffness ribs | |
| EP0449928A1 (en) | Pipe coupling. | |
| JP2013518231A (en) | A coupler having a key surface oriented at an angle | |
| US20150061283A1 (en) | Tube coupling device | |
| US11193611B2 (en) | Pipe coupling apparatus | |
| JP3228089U (en) | Piping connection structure | |
| CN111188955B (en) | Pipe clamp capable of realizing quick connection and pipe clamp assembly | |
| CN114542840B (en) | Butt joint structural member used between ports of deformable plastic composite pressure-resistant pipe | |
| CN217108728U (en) | Butt joint component for deformable plastic composite pipe port and flange port | |
| KR101021968B1 (en) | Non-welded pipe joint with divided flanges | |
| CN219242950U (en) | Connection structure of deformable plastic composite pipe port and adapter | |
| CN210687342U (en) | Metal joint of glass fiber tape winding composite pipe | |
| CN209892894U (en) | Metal buckling and pressing type connecting assembly for pipe body connection | |
| CN217683739U (en) | Composite pipe connector | |
| CN210687423U (en) | Composite pipe metal joint | |
| JPH0341286A (en) | Pipe joint sealing device | |
| CN210687389U (en) | Internal support device of pipeline crimping connector | |
| KR101995528B1 (en) | Rigid polyvinyl chloride tubing with clamping for expansion and contraction | |
| CN219734489U (en) | Steel band reinforcing helical bellows | |
| US9657877B2 (en) | Tube coupling device | |
| CN208417854U (en) | A kind of pipeline sealing vacuum part | |
| CN214999953U (en) | Corrugated pipe joint | |
| KR19980072685A (en) | Sealed connection device of metal pipe | |
| CN212960335U (en) | Lock catch type connecting flange | |
| US20240142025A1 (en) | Pipe fittings and assemblies |
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 |