CN106439279B - Steel-plastic composite pipe connector - Google Patents
Steel-plastic composite pipe connector Download PDFInfo
- Publication number
- CN106439279B CN106439279B CN201611090855.3A CN201611090855A CN106439279B CN 106439279 B CN106439279 B CN 106439279B CN 201611090855 A CN201611090855 A CN 201611090855A CN 106439279 B CN106439279 B CN 106439279B
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- socket groove
- diameter
- connecting piece
- pipe
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- 239000002131 composite material Substances 0.000 title claims abstract description 54
- 238000001816 cooling Methods 0.000 claims description 14
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000012768 molten material Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/02—Welded joints
- F16L13/0218—Welded joints having an inner or outer ring
Abstract
The embodiment of the invention provides a steel-plastic composite pipe connecting piece which comprises a connecting piece body and socket grooves arranged at two ends of the connecting piece body, wherein the diameter of the bottom of the inner wall of each socket groove is smaller than the inner diameter of a pipe matched with the inner wall of the socket groove, the diameter of a mouth part of the inner wall of each socket groove is smaller than the inner diameter of the pipe, and the diameter of the mouth part of the inner wall of each socket groove is smaller than the diameter of the bottom of the inner wall of each socket groove. By applying the steel-plastic composite pipe connecting piece provided by the embodiment of the invention, the diameter of the opening part of the inner wall of the socket groove is smaller than the diameter of the bottom part inside the socket groove, and the diameter of the inner wall of the socket groove is smaller than the inner diameter of the pipe matched with the socket groove, so that the friction resistance applied to the pipe when the pipe is inserted into the socket groove is reduced, and the pipe can be easily inserted into the socket groove of the steel-plastic composite pipe connecting piece.
Description
Technical Field
The invention relates to the technical field of steel-plastic composite pipe connection, in particular to a steel-plastic composite pipe connecting piece.
Background
The steel-plastic composite pipe is a novel pipe with plastic layers coated on the inner side and the outer side of a metal pipe, and the thickness of the plastic layer on the outer side of the pipe is larger than that of the plastic layer on the inner side of the pipe; the steel-plastic composite pipe has the high strength of metal pipe and the corrosion resistance of plastic pipe, so that it is used widely in water and gas circulating system in city building. In practical application, electromagnetic hot-melt welding is mainly adopted for welding a steel-plastic composite pipe (hereinafter referred to as a pipe) and a steel-plastic composite pipe connector (hereinafter referred to as a pipe connector).
Referring to fig. 1, the conventional pipe coupling includes a coupling body 1 and socket grooves 2 provided at both ends of the coupling body 1. This socket and spigot recess 2 includes: socket joint recess inner wall 3 and socket joint recess outer wall 4, and the thickness of the plastic layer of the one side that inner wall 3 corresponds is less than the thickness of the plastic layer of the one side that outer wall 4 corresponds, and the thickness of the inboard plastic layer of socket joint recess is less than the thickness of outside plastic layer promptly. Before welding, the pipe is inserted into the connector body 1 through the socket groove 2. When the pipe and the pipe connecting piece are welded by electromagnetic hot melting, the metal layer of the pipe generates heat under the action of a high-frequency magnetic field generated by the welding fixture, so that the plastic layers on the inner side and the outer side of the pipe are melted, and the aim of mutually welding the pipe and the pipe connecting piece is fulfilled.
However, the diameter of the opening part of the inner wall 3 of the socket groove of the pipe connecting piece is consistent with the diameter of the bottom, the diameter of the inner wall 3 is the same as the inner diameter of the pipe matched with the inner wall, the diameter of the opening part of the outer wall 4 is consistent with the diameter of the bottom, and the diameter of the outer wall 4 is the same as the outer diameter of the pipe matched with the outer wall, so that the pipe is difficult to insert into the pipe socket groove 2.
Disclosure of Invention
The embodiment of the invention aims to provide a steel-plastic composite pipe connecting piece, so that a pipe material matched with the steel-plastic composite pipe connecting piece can be easily inserted into a socket groove of the steel-plastic composite pipe connecting piece. The specific technical scheme is as follows:
the steel-plastic composite pipe connecting piece comprises a connecting piece body and socket grooves arranged at two ends of the connecting piece body, wherein the diameter of the bottom of the inner wall of each socket groove is smaller than the inner diameter of a pipe matched with the inner wall of the socket groove, the diameter of the opening of the inner wall of each socket groove is smaller than the inner diameter of the pipe, and the diameter of the opening of the inner wall of each socket groove is smaller than the diameter of the bottom of the inner wall of each socket groove.
Optionally, the diameter of the bottom of the outer wall of the socket groove is consistent with the diameter of the opening of the outer wall of the socket groove, and the diameter of the outer wall of the socket groove is equal to the outer diameter of the pipe.
Optionally, the diameter of the bottom of the outer wall of the socket groove is larger than the outer diameter of the pipe, the diameter of the opening of the outer wall of the socket groove is larger than the outer diameter of the pipe, and the diameter of the opening of the outer wall of the socket groove is larger than the diameter of the bottom of the outer wall of the socket groove;
the clearance between the inner wall of the socket groove and the inner wall of the pipe is larger than the clearance between the outer wall of the socket groove and the outer wall of the pipe.
Optionally, the diameter of the bottom of the outer wall of the socket groove is 0.1-0.2mm larger than the outer diameter of the pipe, and the diameter of the opening of the outer wall of the socket groove is 0.2-0.6mm larger than the outer diameter of the pipe;
the diameter of the bottom of the inner wall of the socket groove is 0.3-0.7mm smaller than the inner diameter of the pipe, and the diameter of the opening of the inner wall of the socket groove is 0.4-0.8mm smaller than the inner diameter of the pipe.
Optionally, the distance from the mouth to the bottom of the outer wall of the socket groove is greater than the distance from the mouth to the bottom of the inner wall of the socket groove.
Optionally, the distance from the mouth part of the outer wall of the socket groove to the bottom is 7-20mm greater than the distance from the mouth part of the inner wall of the socket groove to the bottom.
Optionally, an observation hole is formed in the outer wall of the connecting piece body and used for observing the socket and spigot groove
Optionally, a central line of the observation hole is perpendicular to a central line of the connector body, and a distance from the central line of the observation hole to the bottom of the socket groove is a radius value of the observation hole.
Optionally, a circle of trapezoidal positioning grooves are formed in the outer wall of the connecting piece body along the circumferential direction of the connecting piece body and used for positioning the electromagnetic heating clamp.
Optionally, both ends of the inner wall of the connector body are provided with stainless steel support sleeves.
Optionally, a rib plate for increasing the strength of the steel-plastic composite pipe connector is arranged on the outer wall of the connector body, and the rib plate is arranged along the axial direction of the connector body.
Optionally, two circles of identification bulges are arranged on the outer wall of the connecting piece body along the circumferential direction of the connecting piece body, one circle of identification bulges is located between the bottom of the socket groove at one end of the connecting piece body and the trapezoidal positioning groove, and the other circle of identification bulges is located between the bottom of the socket groove at the other end of the connecting piece body and the trapezoidal positioning groove.
Optionally, two circles of cooling protrusions are arranged on the outer wall of the connector body along the circumferential direction of the connector body, one circle of cooling protrusion is located between the opening of the inner wall of the socket groove at one end of the connector body and the opening of the outer wall of the socket groove, and the other circle of cooling protrusion is located between the opening of the inner wall of the socket groove at the other end of the connector body and the opening of the outer wall of the socket groove. By applying the steel-plastic composite pipe connecting piece, the diameter of the opening part of the inner wall of the socket groove is smaller than the diameter of the bottom part inside the socket groove, and the diameter of the inner wall of the socket groove is smaller than the inner diameter of the pipe matched with the socket groove, so that the friction resistance of the pipe when the pipe is inserted into the socket groove is reduced, and the pipe can be easily inserted into the socket groove of the steel-plastic composite pipe connecting piece.
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 is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a conventional steel-plastic composite pipe connector;
FIG. 2 is a schematic cross-sectional view of a steel-plastic composite pipe coupling according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a pipe inserted into a steel-plastic composite pipe connector according to an embodiment of the present invention;
FIG. 4 is an enlarged view of a portion A of FIG. 3;
FIG. 5 is an enlarged view of a portion B of FIG. 3;
fig. 6 is a schematic perspective view of a steel-plastic composite pipe connector according to an embodiment of the present invention.
Wherein, the corresponding relationship between each component name and the corresponding reference numeral in fig. 1 is:
1, a connector body, 2, 3, 4 and an inner wall of the socket groove;
the correspondence between the names of the components and the corresponding reference numerals in fig. 2 to 6 is:
the connecting piece comprises a connecting piece body 1, a socket groove 2, a socket groove inner wall 3, a socket groove outer wall 4, an observation hole 5, a positioning groove 6, a stainless steel support sleeve 7, a connecting piece body inner wall 8, a connecting piece body outer wall 9, an electromagnetic induction coil 10, a pipe 11, a rib plate 12, a mark bulge 13 and a cooling bulge 14.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 2 to 6, fig. 2 is a schematic cross-sectional structure view of a steel-plastic composite pipe connector according to an embodiment of the present invention; FIG. 3 is a schematic structural diagram of a pipe inserted into a steel-plastic composite pipe connector according to an embodiment of the present invention; FIG. 4 is an enlarged view of a portion A of FIG. 3; FIG. 5 is an enlarged view of a portion B of FIG. 3; fig. 6 is a schematic perspective view of a steel-plastic composite pipe connector according to an embodiment of the present invention.
With reference to fig. 2 to 6, the steel-plastic composite pipe connecting piece provided in this embodiment includes a connecting piece body 1 and socket grooves 2 disposed at two ends of the connecting piece body 1, wherein a bottom diameter of the inner wall 3 of the socket groove is smaller than or equal to an inner diameter of a pipe 11 adapted to the steel-plastic composite pipe connecting piece, a mouth diameter of the inner wall 3 of the socket groove is smaller than the inner diameter of the pipe 11, and the mouth diameter of the inner wall 3 of the socket groove is smaller than the bottom diameter of the inner wall 3 of the socket groove. That is, the diameter of the socket inner wall 3 is smaller than or equal to the inner diameter of the pipe 11, and the diameter of the mouth of the socket inner wall 3 is smaller than the diameter of the bottom of the socket inner wall 3.
It will be appreciated that the connector body 1 has two female recesses 2. The diameter of the bottom of the socket groove inner wall 3 is the diameter of the inner wall at the bottom position of the socket groove 2, and the diameter of the opening part of the socket groove inner wall 3 is the diameter of the inner wall at the opening part position of the socket groove 2. Correspondingly, the diameter of the bottom of the outer wall 4 of the socket groove is the diameter of the outer wall at the bottom position of the socket groove 2, and the diameter of the opening of the outer wall 4 of the socket groove is the diameter of the inner wall at the opening position of the socket groove 2. The bottom of the socket groove is positioned inside the connector body 1, and the opening of the socket groove 2 is positioned at the port of the connector body 1.
By applying the steel-plastic composite pipe connecting piece, the diameter of the opening part of the inner wall 3 of the socket groove is smaller than the diameter of the bottom part of the inner wall 3 of the socket groove, and the diameter of the inner wall 3 of the socket groove is smaller than the inner diameter of the pipe 11, so that the friction resistance received when the pipe 11 is inserted into the socket groove 2 is reduced, and the pipe 11 is easily inserted into the socket groove 2 of the steel-plastic composite pipe connecting piece.
In the prior art, the thickness of the plastic layer on the inner side of the socket groove is smaller than that of the plastic layer on the outer side, and the thickness of the plastic layer on the inner side of the pipe is smaller than that of the plastic layer on the outer side of the pipe, so that the plastic layer on the inner side of the socket groove melts before the plastic layer on the outer side of the socket groove under the condition that the metal layer of the pipe conducts the same heat to the inner side and the outer side. For example, the socket groove outside plastic layer has not completely melted when the socket groove inside plastic layer welds each other with tubular product, and tubular product inside plastic layer and socket groove inside plastic layer but take place deformation owing to absorb too much heat when the socket groove outside plastic layer welds each other with tubular product, degrade even, influence the performance and the life expectancy of pipe junction. Namely, the problem that the steel-plastic composite pipe connecting piece can not be welded with the pipe simultaneously exists.
For solving the problem that the steel-plastic composite pipe connecting piece can not be welded with the pipe simultaneously, as an optional mode of the embodiment, the diameter of the bottom of the outer wall 4 of the socket groove can be consistent with the diameter of the opening of the outer wall 4 of the socket groove, and the diameter of the outer wall 4 of the socket groove is equal to the outer diameter of the pipe 11.
That is, the diameter of the outer wall 4 of the socket groove is equal to the outer diameter of the pipe 11, the diameter of the inner wall 3 of the socket groove is smaller than the inner diameter of the pipe 11, and the diameter of the mouth of the inner wall 3 of the socket groove is smaller than the diameter of the bottom of the inner wall 3 of the socket groove. Because the diameter of the opening part of the socket-and-spigot groove inner wall 3 is smaller than the diameter of the bottom part of the socket-and-spigot groove inner wall 3, namely, no gap exists between the socket-and-spigot groove outer wall 4 and the outer wall of the pipe 11, and a certain gap exists between the socket-and-spigot groove inner wall 3 and the inner wall of the pipe 11.
Because socket joint recess inner wall 3 has certain clearance with tubular product 11 inner wall, can increase the plastic layer of tubular product 11 inboard and the heat absorption time of socket joint recess inner wall 3, and then solved because tubular product 11 inboard plastic layer and outside plastic layer thickness inconsistent and the tubular product 11 that leads to can not be with the welded problem of steel-plastic composite pipe connecting piece simultaneously. In addition, because the diameter of the inner wall 3 of the socket groove is smaller than the inner diameter of the pipe 11, and the diameter of the opening of the inner wall 3 of the socket groove is smaller than the diameter of the bottom, when the pipe 11 is inserted into the socket groove 2, the air in the socket groove 2 can be discharged, so that the pipe 11 is inserted into the socket groove 2 more easily.
It will be understood that the inner diameter of the tube 11 is the diameter of the inner wall of the tube 11 and the outer diameter of the tube 11 is the diameter of the outer wall of the tube 11.
In order to solve the problem that the steel-plastic composite pipe connecting piece cannot be welded with the pipe at the same time, as another optional mode of the embodiment, the diameter of the bottom of the outer wall 4 of the socket groove can be larger than the outer diameter of the pipe 11, the diameter of the opening of the outer wall 4 of the socket groove is larger than the outer diameter of the pipe 11, and the diameter of the opening of the outer wall 4 of the socket groove is larger than the diameter of the bottom of the outer wall 4 of the socket groove; the clearance between the inner wall 3 of the socket groove and the inner wall of the pipe 11 is larger than the clearance between the outer wall 4 of the socket groove and the outer wall of the pipe 11.
That is, the diameter of the outer wall 4 of the socket groove is larger than the outer diameter of the pipe 11, and the diameter of the mouth of the outer wall 4 of the socket groove is larger than the diameter of the bottom of the outer wall 4 of the socket groove. And the clearance between the inner wall 3 of the socket groove and the inner wall of the pipe 11 is larger than the clearance between the outer wall 4 of the socket groove and the outer wall of the pipe 11.
Specifically, the diameter of the bottom of the outer wall 4 of the socket groove can be 0.1-0.2mm larger than the outer diameter of the pipe 11, the diameter of the opening of the outer wall 4 of the socket groove can be 0.2-0.6mm larger than the outer diameter of the pipe 11, and the diameter of the opening of the outer wall 4 of the socket groove is larger than the diameter of the bottom of the outer wall 4 of the socket groove; the diameter of the bottom of the inner wall 3 of the socket groove can be smaller than the inner diameter of the pipe 11 by 0.3-0.7mm, the diameter of the opening of the inner wall 3 of the socket groove can be smaller than the inner diameter of the pipe 11 by 0.4-0.8mm, and the diameter of the opening of the inner wall 3 of the socket groove is smaller than the diameter of the bottom of the inner wall 3 of the socket groove. And the clearance between the inner wall 3 of the socket groove and the inner wall of the pipe 11 is larger than the clearance between the outer wall 4 of the socket groove and the outer wall of the pipe 11.
Because the clearance between the inner diameter of the pipe 11 and the inner wall 3 of the socket groove is larger than the clearance between the outer diameter of the pipe 11 and the outer wall 4 of the socket groove, the heat absorption time of the plastic layer at the inner side of the pipe 11 and the inner wall 3 of the socket groove can be prolonged, and the problem that the pipe 11 cannot be welded with the steel-plastic composite pipe connecting piece simultaneously due to the fact that the thicknesses of the plastic layer at the inner side of the socket groove 2 and the plastic layer at the outer side are different is solved. Moreover, because the diameter of the inner wall 3 of the socket groove is smaller than the inner diameter of the pipe 11, the diameter of the opening of the inner wall 3 of the socket groove is smaller than the diameter of the bottom, the diameter of the outer wall 4 of the socket groove is larger than the outer diameter of 11, and the diameter of the opening of the outer wall 4 of the socket groove is larger than the diameter of the bottom of the outer wall 4 of the socket groove, when the pipe 11 is inserted into the socket groove 2, the air in the socket groove 2 can be discharged, and the pipe 11 can be easily inserted into the socket groove 2 of the steel-plastic composite pipe connecting piece.
Further, the distance from the mouth to the bottom of the outer wall 4 of the socket groove is larger than the distance from the mouth to the bottom of the inner wall 3 of the socket groove. It can be understood that the distance from the mouth of the outer wall 4 of the socket groove to the bottom is the length of the outer wall 4 of the socket groove, and the distance from the mouth of the inner wall 3 of the socket groove to the bottom is the length of the inner wall 3 of the socket groove.
Specifically, the distance from the mouth to the bottom of the outer wall 4 of the socket groove may be greater than the distance from the mouth to the bottom of the inner wall 3 of the socket groove by 7-20 mm. The distance from the mouth to the bottom of the inner wall 3 of the female groove may be 20-60 mm. The thickness of the inner wall 3 of the socket groove can be 2.6-10mm, and the thickness of the outer wall 4 of the socket groove is 0.8-1.5mm larger than that of the inner wall 3 of the socket groove. Such socket and spigot groove can make the mouth part of socket and spigot groove outer wall 4 form the cooling hole when the welding, avoids 4 mouth parts of socket and spigot groove outer wall thermal expansion grow, can be better fix a position tubular product 11.
Further, an observation hole 5 is formed in the outer wall 9 of the connecting piece body and used for observing the socket and spigot groove 2.
It can be understood that the number of the observation holes 5 is two, one observation hole 5 observes the socket groove 2 at one end of the connector body 1, and the other observation hole 5 observes the socket groove 2 at the other end of the connector body 1. Alternatively, the center line of the sight hole 5 may be perpendicular to the center line of the coupler body 1, and the distance from the center line of the sight hole 5 to the bottom of the socket 2 is equal to the radius value of the sight hole 5. Whether the pipe 11 is inserted into the bottom of the socket groove 2 or not can be observed by arranging the observation hole 5 at the bottom of the socket groove 2. And, when inserting the pipe 11 into the socket groove 2, the air in the socket groove 2 can be discharged, so that the pipe 11 can be inserted into the socket groove 2 more easily. During welding, molten materials after the steel-plastic composite pipe connecting piece and the pipe 11 are welded overflow from the observation hole 5, and the welding quality can be judged through the overflowing molten materials.
Further, a positioning groove 6 is arranged on the outer wall 9 of the connecting piece body. Used for positioning the electromagnetic heating clamp.
Specifically, the positioning groove 6 may be provided on the connector body outer wall 9 along the circumferential direction of the connector body 1. The positioning groove 6 can be a trapezoidal groove, and the width of the opening part of the trapezoidal groove is larger than the width of the bottom part of the trapezoidal groove. The trapezoid-shaped groove is positioned in the middle of the central lines of the two observation holes 5, and does not intersect with the observation holes 5. By adopting the trapezoidal groove positioning electromagnetic heating clamp, the inner wall 3 of the socket groove can be completely positioned in the heating range of the electromagnetic induction coil 10.
Further, both ends of the inner wall 8 of the connector body may be provided with stainless steel support sleeves 7. The stainless steel support sleeve 7 is embedded in the inner wall 8 of the connector body. Through stainless steel support sleeve 7, can increase the intensity of socket joint recess inner wall 3, stabilize the size of socket joint recess inner wall 3 under different temperatures for compound union coupling spare connecting piece can not soften the deformation. Meanwhile, the stainless steel support sleeve 7 does not have magnetic induction and generates heat, so that the heat absorption time of the inner wall 3 of the socket groove can be prolonged, the melting time of the inner wall 3 of the socket groove is consistent with that of the outer wall 4 of the socket groove, the steel-plastic composite pipe connecting piece and the pipe 11 can be welded at the same time, and the welding quality is guaranteed.
Specifically, the stainless steel support sleeve 7 may be a C-shaped circular stainless steel support sleeve embedded at both ends of the inner wall 8 of the connector body.
Preferably, a rib plate 12 for increasing the strength of the steel-plastic composite pipe connector is arranged on the outer wall 9 of the connector body, and the rib plate 12 is arranged along the axial direction of the connector body 1. Alternatively, the number of ribs 12 may be four. The four rib plates 12 are arranged in parallel and evenly, namely, two rib plates 12 are arranged oppositely, the interval between every two rib plates 12 is 90 degrees, and each rib plate 12 is arranged along the axial direction of the connector body 1. The four ribs 12 arranged uniformly can also be used as angle positioning lines when the pipe 11 is inserted into the socket groove 2.
Optionally, two circles of identification protrusions 13 are arranged on the outer wall 9 of the connecting piece body along the circumferential direction of the connecting piece body 1, one circle of identification protrusion 13 is located between the bottom of the socket groove 2 at one end of the connecting piece body 1 and the trapezoidal positioning groove 6, and the other circle of identification protrusion 13 is located between the bottom of the socket groove 2 at the other end of the connecting piece body 1 and the trapezoidal positioning groove 6. When the pipe 11 is inserted into the socket groove 2, the marking protrusion 13 can be used as a marking line of the reserved length of the pipe 11. In practical application, the reserved length of the pipe 11 inserted into the socket groove 2 can be determined according to the distance between the identification bulge 13 and the port of the connecting piece body 1.
Furthermore, two circles of cooling protrusions 14 are arranged on the outer wall 9 of the connecting piece body along the circumferential direction of the connecting piece body 1, one circle of cooling protrusions 14 is located between the opening of the socket groove inner wall 3 at one end of the connecting piece body 1 and the opening of the socket groove outer wall 4, and the other circle of cooling protrusions 14 is located between the opening of the socket groove inner wall 3 at the other end of the connecting piece body 1 and the opening of the socket groove outer wall 4. In particular, the cooling protrusion 14 may be located at the mouth of the socket groove outer wall 4 at a predetermined distance from the port of the connector body 1. During welding, because the thickness of the mouth part of the outer wall 4 of the socket groove is increased by the cooling bulge 14, the time for absorbing heat at the mouth part of the outer wall 4 of the socket groove is further increased, the mouth part of the outer wall 4 of the socket groove can form a cooling port, the mouth part of the outer wall 4 of the socket groove is prevented from expanding due to thermal expansion, and the pipe 11 can be better positioned.
Please refer to fig. 3, which is a schematic structural diagram of a pipe inserted into the steel-plastic composite pipe connector according to the embodiment of the present invention.
As can be seen from FIG. 3, since the diameter of the inner wall 3 of the socket groove is smaller than the inner diameter of the pipe 11, and the diameter of the mouth of the inner wall 3 of the socket groove is smaller than the diameter of the bottom, the pipe 11 can be easily inserted into the socket groove 2 of the steel-plastic composite pipe connecting piece. After the pipe 11 is inserted into the socket groove 2, the gap between the inner diameter of the pipe 11 and the inner wall 3 of the socket groove (see fig. 4) is larger than the gap between the outer diameter of the pipe 11 and the outer wall 4 of the socket groove (see fig. 5), so that the heat absorption time of the plastic layer on the inner side of the pipe 11 and the inner wall 3 of the socket groove can be prolonged, and the problem that the pipe 11 cannot be welded with the steel-plastic composite pipe connecting piece simultaneously due to the inconsistent thickness of the inner plastic layer and the outer plastic layer of the pipe 11 is solved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (12)
1. A steel-plastic composite pipe connecting piece comprises a connecting piece body (1) and socket grooves (2) arranged at two ends of the connecting piece body (1), and is characterized in that the diameter of the bottom of a socket groove inner wall (3) is smaller than or equal to the inner diameter of a pipe matched with the socket groove inner wall, the diameter of a mouth part of the socket groove inner wall (3) is smaller than the inner diameter of the pipe, and the diameter of the mouth part of the socket groove inner wall (3) is smaller than the diameter of the bottom of the socket groove inner wall (3);
the distance from the mouth part of the outer wall (4) of the socket groove to the bottom is greater than the distance from the mouth part of the inner wall (3) of the socket groove to the bottom;
the clearance between the inner wall (3) of the socket groove and the inner wall of the pipe is larger than the clearance between the outer wall (4) of the socket groove and the outer wall of the pipe.
2. The steel-plastic composite pipe connection according to claim 1, wherein the diameter of the bottom of the socket groove outer wall (4) is the same as the diameter of the mouth of the socket groove outer wall (4), and the diameter of the socket groove outer wall (4) is equal to the outer diameter of the pipe.
3. The steel-plastic composite pipe connection according to claim 1, wherein the diameter of the bottom of the socket groove outer wall (4) is greater than the outer diameter of the pipe, the diameter of the mouth of the socket groove outer wall (4) is greater than the outer diameter of the pipe, and the diameter of the mouth of the socket groove outer wall (4) is greater than the diameter of the bottom of the socket groove outer wall (4).
4. The steel-plastic composite pipe connecting piece according to claim 3, wherein the diameter of the bottom of the outer wall (4) of the socket groove is 0.1-0.2mm larger than the outer diameter of the pipe, and the diameter of the mouth of the outer wall (4) of the socket groove is 0.2-0.6mm larger than the outer diameter of the pipe;
the diameter of the bottom of the socket groove inner wall (3) is 0.3-0.7mm smaller than the inner diameter of the pipe, and the diameter of the opening of the socket groove inner wall (3) is 0.4-0.8mm smaller than the inner diameter of the pipe.
5. The steel-plastic composite pipe connection according to claim 1, wherein the distance from the mouth to the bottom of the outer wall (4) of the socket groove is greater than the distance from the mouth to the bottom of the inner wall (3) of the socket groove by 7-20 mm.
6. The steel-plastic composite pipe connecting piece according to claim 1, wherein the outer wall (9) of the connecting piece body is provided with an observation hole (5) for observing the socket groove.
7. The steel-plastic composite pipe connecting piece according to claim 6, wherein the centerline of the sight hole (5) is perpendicular to the centerline of the connecting piece body (1), and the distance from the centerline of the sight hole (5) to the bottom of the socket groove (2) is the radius value of the sight hole (5).
8. The steel-plastic composite pipe connecting piece according to claim 7, wherein a circle of trapezoidal positioning grooves (6) are arranged on the outer wall (9) of the connecting piece body along the circumferential direction of the connecting piece body (1) and used for positioning the electromagnetic heating clamp.
9. The steel-plastic composite pipe connecting piece according to claim 8, wherein the stainless steel support sleeves (7) are provided at both ends of the inner wall (8) of the connecting piece body.
10. The steel-plastic composite pipe connector as claimed in claim 9, wherein the connector body outer wall (9) is provided with a rib plate (12) for increasing the strength of the steel-plastic composite pipe connector, the rib plate (12) being provided along the axial direction of the connector body (1).
11. The steel-plastic composite pipe connecting piece according to claim 10, wherein two circles of identification protrusions (13) are provided on the outer wall (9) of the connecting piece body along the circumferential direction of the connecting piece body (1), one circle of identification protrusions (13) is located between the bottom of the socket groove (2) at one end of the connecting piece body (1) and the trapezoidal positioning groove (6), and the other circle of identification protrusions (13) is located between the bottom of the socket groove (2) at the other end of the connecting piece body (1) and the trapezoidal positioning groove (6).
12. The steel-plastic composite pipe connecting piece according to claim 11, wherein the outer wall (9) of the connecting piece body is provided with two circles of cooling protrusions (14) along the circumferential direction of the connecting piece body (1), one circle of cooling protrusions (14) is located between the mouth of the inner wall (3) of the socket groove at one end of the connecting piece body (1) and the mouth of the outer wall (4) of the socket groove, and the other circle of cooling protrusions (14) is located between the mouth of the inner wall (3) of the socket groove at the other end of the connecting piece body (1) and the mouth of the outer wall (4) of the socket groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611090855.3A CN106439279B (en) | 2016-11-30 | 2016-11-30 | Steel-plastic composite pipe connector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611090855.3A CN106439279B (en) | 2016-11-30 | 2016-11-30 | Steel-plastic composite pipe connector |
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| CN106439279A CN106439279A (en) | 2017-02-22 |
| CN106439279B true CN106439279B (en) | 2020-11-06 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101852323A (en) * | 2010-06-01 | 2010-10-06 | 中科华飞管业(东莞)有限公司 | Electromagnetic inductive welding method of steel-plastic compound pipe |
| CN202992439U (en) * | 2013-01-11 | 2013-06-12 | 王占奎 | Electromagnetism melting spigot and faucet pipe fitting and steel-plastic complex pipe electromagnetism melting spigot and faucet structure |
| EP2801743B1 (en) * | 2013-05-07 | 2017-07-12 | TI Automotive (Fuldabrück) GmbH | Method for connecting a conduit connector with a fluid-conducting motor vehicle line |
| CN204512704U (en) * | 2015-04-02 | 2015-07-29 | 青岛茂洋新高科技有限公司 | Electromagnetic induction heating type aluminium-plastic pipe pipe fitting |
| CN204692788U (en) * | 2015-06-08 | 2015-10-07 | 浙江楠丰管道工业有限公司 | Direct-type embedded electromagnetic welding double tube structure and embedded direct-type joint thereof |
| CN206234505U (en) * | 2016-11-30 | 2017-06-09 | 罗贤想 | A kind of steel plastic compount pipe connections |
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Effective date of registration: 20200520 Address after: 432721 Guangshui Development Zone, Hubei Province, along the River Road, No. 3, No. Applicant after: HUBEI DAYANG PLASTIC Co.,Ltd. Address before: 432721 Guangshui Development Zone, Hubei Province, along the River Road, No. 3, No. Applicant before: Luo Xianxiang Applicant before: Yang Linfeng |
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Denomination of invention: A steel plastic composite pipe connector Effective date of registration: 20231211 Granted publication date: 20201106 Pledgee: China Construction Bank Guangshui Branch Pledgor: HUBEI DAYANG PLASTIC Co.,Ltd. Registration number: Y2023980070660 |