CN106402524B - Steel-plastic composite pipe connector - Google Patents
Steel-plastic composite pipe connector Download PDFInfo
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- CN106402524B CN106402524B CN201611090605.XA CN201611090605A CN106402524B CN 106402524 B CN106402524 B CN 106402524B CN 201611090605 A CN201611090605 A CN 201611090605A CN 106402524 B CN106402524 B CN 106402524B
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- socket groove
- diameter
- connecting piece
- pipe
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- 229920003023 plastic Polymers 0.000 title claims abstract description 101
- 239000004033 plastic Substances 0.000 title claims abstract description 101
- 239000002131 composite material Substances 0.000 title claims abstract description 57
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005674 electromagnetic induction Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000012768 molten material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection 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
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 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, and is characterized in that 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; and a heating ring is embedded in the connecting piece body corresponding to the outer wall of the socket groove. The steel-plastic composite pipe connecting piece provided by the embodiment of the invention can enable the pipe fitting matched with the steel-plastic composite pipe connecting piece to be easily inserted into the socket groove of the steel-plastic composite pipe connecting piece, and can be simultaneously welded with the pipe fitting, so that the pipe fitting is welded with the pipe fitting consistently.
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 new type pipe material whose inner side and outer side of metal pipe are coated with plastic layer, and can be extensively used in circulating system of water and gas in urban residential building. In practical application, the electromagnetic hot melting welding of the steel-plastic composite pipe (hereinafter referred to as pipe) and the steel-plastic composite pipe connecting piece is mainly adopted.
Referring to fig. 1, the conventional steel-plastic composite pipe connector includes a connector body 1 and pipe socket grooves 2 formed at both ends of the connector body 1. This socket and spigot recess 2 includes: inner wall 3 and 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 the outside plastic layer promptly. Before welding, the pipe is inserted into the connecting piece body 1 through the pipe socket groove 2. When the pipe and the steel-plastic composite 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 steel-plastic composite pipe connecting piece is fulfilled.
However, the diameter of the opening part of the inner wall 3 of the pipe socket groove 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. And, the thickness of the inboard plastic layer of tubular product is less than the thickness of the plastic layer in the tubular product outside, and the thickness of the inboard plastic layer of socket joint recess 2 is less than the thickness of outside plastic layer, consequently, inwards at the tubular product metal level, under the same thermal condition of outside conduction, because the outside plastic layer of tubular product outside plastic layer is thicker and socket joint recess 2 is thicker, the outside plastic layer that leads to tubular product and socket joint recess 2 absorbs heat for a long time, it is slower to melt, and then the inboard plastic layer that leads to socket joint recess 2 melts earlier than the outside plastic layer. For example, when the inner plastic layer of the pipe and the inner plastic layer of the socket groove 2 are melted and welded with each other, the outer plastic layer of the socket groove 2 is not completely melted; and when the outside plastic layer of socket joint recess 2 and tubular product outside plastic layer melt when welding each other, the inboard plastic layer of socket joint recess 2 is but because absorb too much heat and take place deformation, even degradation, influences the performance and the life cycle of pipe connection department. I.e. there is a problem that the pipe connection cannot be welded to the pipe at the same time.
Therefore, the existing steel-plastic composite pipe connecting piece has the problems of difficult socket joint with the pipe and incapability of being simultaneously welded with the pipe.
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 is easily inserted into a socket groove of the steel-plastic composite pipe connecting piece and is consistent with the pipe material in welding. The specific technical scheme is as follows:
a 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 bottom diameter of the inner wall of each socket groove is smaller than the inner diameter of a pipe matched with the connecting piece body, the diameter of the opening part of the inner wall of each socket groove is smaller than the inner diameter of the pipe, and the diameter of the opening 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;
and a heating ring is embedded in the connecting piece body corresponding to the outer wall of the socket groove.
Optionally, the heating ring comprises a metal wire and a plastic layer wrapping the metal wire, and the heating ring is in a spiral shape.
Optionally, the length of the heating ring is the same as that of the inner wall of the socket groove, and the inner diameter of the heating ring is greater than or equal to the diameter of the outer wall of the socket groove.
Optionally, the metal wire is specifically an iron wire, and the diameter of the iron wire is 0.3-1mm, and the thickness of the plastic layer is 0.2-2 mm.
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, the outer wall of the connecting piece body is provided with two observation holes corresponding to the socket grooves at the two ends of the connecting piece body, respectively, and the observation holes penetrate through the outer wall of the connecting piece body.
Optionally, the central lines of the two observation holes are perpendicular to the central line of the connector body, and the distance from the central line of each observation hole to the bottom of the socket groove corresponding to the observation hole is the radius 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.
Optionally, both ends of the inner wall of the connector body are provided with stainless steel support sleeves for preventing deformation of the inner wall of the socket groove.
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.
The steel-plastic composite pipe connecting piece provided by the embodiment of the invention can enable the pipe fitting matched with the steel-plastic composite pipe connecting piece to be easily inserted into the socket groove of the steel-plastic composite pipe connecting piece, and can be simultaneously welded with the pipe fitting, so that the pipe fitting is welded with the pipe fitting consistently.
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, a heating ring 5, an observation hole 6, a positioning groove 7, a stainless steel support sleeve 8, a connecting piece body inner wall 9, a connecting piece body outer wall 10, an electromagnetic induction ring 11, a pipe 12, a rib plate 13, a mark 14 and a cooling protrusion 15.
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 12 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 12, 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. Namely, the diameter of the inner wall 3 of the socket groove is less than or equal to the inner diameter of the pipe 12, and the diameter of the opening part of the inner wall 3 of the socket groove is less than the diameter of the bottom part of the inner wall 3 of the socket groove; and a heating ring 5 is embedded in the connecting piece body corresponding to the socket groove outer wall 4.
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.
Specifically, the heating ring 5 and the connector body 1 are injection molded integrally by adopting an injection molding method, and the heating ring 5 is coaxially embedded with the connector body 1. The injection molding method used is a method commonly used by those skilled in the art, and the present embodiment will not be described.
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 12, so that the friction resistance borne by the pipe 12 when the pipe 12 is inserted into the socket groove 2 is reduced, and the pipe 12 can be easily inserted into the socket groove 2 of the steel-plastic composite pipe connecting piece. The heating ring 5 embedded in the connecting piece body corresponding to the socket groove outer wall 4 can accelerate the heat absorption speed of the socket groove outer wall 4, so that the melting time of the socket groove outer wall 4 is reduced, and the problem that the steel-plastic composite pipe connecting piece cannot be welded with a pipe simultaneously due to the fact that the thickness of the inner side plastic layer of the socket groove 4 is smaller than that of the outer side plastic layer is solved.
Further, the heating ring 5 may include a metal wire and a plastic layer wrapping the metal wire, and the heating ring 5 formed of the metal wire wrapped by the plastic layer has a spiral shape.
Specifically, in practical application, the plastic layer can be wrapped outside the iron wire, then the iron wire wrapped around the plastic layer is made into the spiral heating ring 5, and finally the spiral heating ring 5 is embedded into the connecting piece body 1. Optionally, in order to enable the socket-and-spigot groove inner wall 3 to be within the heating range of the electromagnetic induction coil 11, the length of the socket-and-spigot groove inner wall 3 may be the same as the length of the electromagnetic induction coil 11 used for welding, in order to avoid waste caused by the overlong length of the heating ring 5, the length of the heating ring 5 is the same as the length of the socket-and-spigot groove inner wall 3, and the inner diameter of the heating ring 5 is greater than or equal to the diameter of the socket-and-spigot groove outer wall 4. It will be appreciated that the inner diameter of the helically shaped heating ring 5 is the smallest diameter of the helix. On the basis that the heating ring 5 can be in contact with the outer surface of the pipe 12, the inner diameter of the heating ring 5 can be larger than the diameter of the outer wall of the socket groove.
Optionally, the metal wire may be specifically an iron wire, and the diameter of the iron wire is 0.3-1mm, and the thickness of the plastic layer wrapping the iron wire is 0.2-2 mm.
As an alternative to this embodiment, the diameter of the bottom of the outer wall 4 of the socket groove may be the same as the diameter of the mouth 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 12.
That is, the diameter of the outer wall 4 of the socket groove is equal to the outer diameter of the pipe 12, the diameter of the inner wall 3 of the socket groove is smaller than or equal to the inner diameter of the pipe 12, 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 12, and a certain gap exists between the socket-and-spigot groove inner wall 3 and the inner wall of the pipe 12.
Because the diameter of the inner wall 3 of the socket groove is smaller than the inner diameter of the pipe 12, and the diameter of the opening part of the inner wall 3 of the socket groove is smaller than the diameter of the bottom part, when the pipe 12 is inserted into the socket groove 2, the air in the socket groove 2 can be discharged, so that the pipe 12 can be inserted into the socket groove 2 more easily. And, because certain clearance has existed with tubular product 12 inner wall in socket joint recess inner wall 3, can increase the plastic layer of tubular product 12 inboard and the heat absorption time of socket joint recess inner wall 3, further make the melting time of the outside plastic layer of socket joint recess 2 unanimous with the melting time of inboard plastic layer, better solution tubular product 12 can not be with the problem of the compound union coupling butt fusion of steel plastics simultaneously.
It will be appreciated that the inner diameter of the tubing 12 is the diameter of the inner wall of the tubing 12 and the outer diameter of the tubing 12 is the diameter of the outer wall of the tubing 12.
As another optional way of this embodiment, the diameter of the bottom of the outer wall 4 of the socket groove may be larger than the outer diameter of the pipe 12, the diameter of the mouth of the outer wall 4 of the socket groove is larger than the outer diameter of the pipe 12, 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; the clearance between the inner wall 3 of the socket groove and the inner wall of the pipe 12 is larger than the clearance between the outer wall 4 of the socket groove and the outer wall of the pipe 12.
That is, the diameter of the outer wall 4 of the socket groove is larger than the outer diameter of the pipe 12, 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 12 is larger than the clearance between the outer wall 4 of the socket groove and the outer wall of the pipe 12.
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 12, 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 12, 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 0.3-0.7mm smaller than the inner diameter of the pipe 12, the diameter of the opening of the inner wall 3 of the socket groove can be 0.4-0.8mm smaller than the inner diameter of the pipe 12, 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 12 is larger than the clearance between the outer wall 4 of the socket groove and the outer wall of the pipe 12.
Because the diameter of the inner wall 3 of the socket groove is smaller than the inner diameter of the pipe 12, the diameter of the opening part of the inner wall 3 of the socket groove is smaller than the diameter of the bottom part, the diameter of the outer wall 4 of the socket groove is larger than the outer diameter of 12, and the diameter of the opening part of the outer wall 4 of the socket groove is larger than the diameter of the bottom part of the outer wall 4 of the socket groove, when the pipe 12 is inserted into the socket groove 2, the air in the socket groove 2 can be discharged, and the pipe 12 can be easily inserted into the socket groove 2 of the steel-plastic composite pipe connecting piece. In addition, because the clearance between the inner diameter of the pipe 12 and the inner wall 3 of the socket groove is larger than the clearance between the outer diameter of the pipe 12 and the outer wall 4 of the socket groove, the heat absorption time of the plastic layer on the inner side of the pipe 12 and the inner wall 3 of the socket groove can be increased, the melting time of the outer plastic layer of the socket groove 2 is further consistent with that of the inner plastic layer, and the problem that the pipe 12 cannot be welded with the steel-plastic composite pipe connecting piece at the same time is better solved.
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 welding, avoids 4 mouth parts of socket and spigot groove outer wall thermal expansion grow, can be better fix a position tubular product 12.
Furthermore, two observation holes 6 corresponding to the socket grooves 2 at the two ends of the connecting piece body 1 are arranged on the outer wall 10 of the connecting piece body, and each observation hole 6 penetrates through the outer wall 10 of the connecting piece body. For viewing the socket 2.
Specifically, the center lines of the two observation holes 6 may be perpendicular to the center line of the connector body 1, and the distance from the center line of each observation hole 6 to the bottom of its corresponding socket groove 2 is the radius of the observation hole 6. That is, one observation hole 6 observes the socket groove 2 of one end of the connector body 1, and the other observation hole 6 observes the socket groove 2 of the other end of the connector body 1. By disposing the sight glass 6 at the bottom position of the socket groove 2, it can be observed whether the pipe 12 is inserted into the bottom of the socket groove 2. And, when the pipe 12 is inserted into the socket groove 2, air in the socket groove 2 can be discharged, so that the pipe 12 is inserted into the socket groove 2 more easily. During welding, molten materials after the steel-plastic composite pipe connecting piece and the pipe 12 are welded overflow from the observation hole 6, and the welding quality can be judged through the overflowing molten materials.
Further, the outer wall 10 of the connecting piece body is provided with a positioning groove 7. Used for positioning the electromagnetic heating clamp.
Specifically, the positioning groove 7 may be provided on the connector body outer wall 10 along the circumferential direction of the connector body 1. The positioning groove 7 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 6, and does not intersect with the observation holes 6. 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 11.
Further, both ends of the inner wall 9 of the connector body may be provided with stainless steel support sleeves 8. The stainless steel support sleeve 8 is embedded in the inner wall 9 of the connector body. Through stainless steel support sleeve 8, 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 8 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 12 can be welded at the same time, and the welding quality is guaranteed.
Specifically, the stainless steel support sleeve 8 may be a C-shaped circular stainless steel support sleeve embedded at both ends of the inner wall 9 of the connector body.
Preferably, a rib plate 13 for increasing the strength of the steel-plastic composite pipe connector is arranged on the outer wall 10 of the connector body, and the rib plate 13 is arranged along the axial direction of the connector body 1. Alternatively, the number of the ribs 13 may be four. The four rib plates 13 are arranged in parallel and evenly, namely, two rib plates 13 are arranged oppositely, every two rib plates 13 are spaced by 90 degrees, and each rib plate 13 is arranged along the axial direction of the connector body 1. The four ribs 13 arranged uniformly can also be used as angle positioning lines when the pipe 12 is inserted into the socket groove 2.
Optionally, two circles of identification protrusions 14 are arranged on the outer wall 10 of the connector body along the circumferential direction of the connector body 1, one circle of identification protrusions 14 is located between the bottom of the socket groove 2 at one end of the connector body 1 and the trapezoidal positioning groove 7, and the other circle of identification protrusions 14 is located between the bottom of the socket groove 2 at the other end of the connector body 1 and the trapezoidal positioning groove 7. The identification protrusion 14 may serve as an indication line for a reserved length of the pipe 12 when the pipe 12 is inserted into the socket 2.
Further, two circles of cooling protrusions 15 are arranged on the outer wall 10 of the connector body along the circumferential direction of the connector body 1, one circle of cooling protrusion 15 is located between the opening of the socket groove inner wall 3 at one end of the connector body 1 and the opening of the socket groove outer wall 4, and the other circle of cooling protrusion 15 is located between the opening of the socket groove inner wall 3 at the other end of the connector body 1 and the opening of the socket groove outer wall 4.
Specifically, the cooling protrusion 15 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 15, 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 12 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 12, 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 12 can be easily inserted into the socket groove 2 of the steel-plastic composite pipe connector. After the pipe 12 is inserted into the socket groove 2, the gap between the inner diameter of the pipe 12 and the inner wall 3 of the socket groove (see fig. 4) is larger than the gap between the outer diameter of the pipe 12 and the outer wall 4 of the socket groove (see fig. 5), the heat absorption time of the inner side plastic layer of the socket groove 2 can be increased, the heat absorption time of the outer side plastic layer of the socket groove 2 can be reduced by the heating ring 5, and the problem that the pipe 12 plastic layer cannot be welded with the steel-plastic composite pipe connecting piece simultaneously due to the inconsistent thickness of the inner side plastic layer and the outer side plastic layer of the socket groove 2 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 (13)
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 (12) 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 (12), 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);
a heating ring (5) is embedded in the connecting piece body corresponding to the outer wall (4) of the socket groove; the length of the heating ring (5) is the same as that of the socket groove inner wall (3), and the inner diameter of the heating ring (5) is larger than or equal to the diameter of the socket groove outer wall (4);
the heating ring (5) comprises a metal wire and a plastic layer wrapping the metal wire, and the heating ring (5) is in a spiral shape;
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 (12) is larger than the clearance between the outer wall (4) of the socket groove and the outer wall of the pipe (12).
2. The steel-plastic composite pipe connecting member as claimed in claim 1, wherein the metal wire is an iron wire, and the iron wire has a diameter of 0.3-1mm and the plastic layer has a thickness of 0.2-2 mm.
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 identical to 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 (12).
4. The steel-plastic composite pipe connection according to claim 1, wherein the bottom diameter of the socket groove outer wall (4) is larger than the outer diameter of the pipe (12), the mouth diameter of the socket groove outer wall (4) is larger than the outer diameter of the pipe (12), and the mouth diameter of the socket groove outer wall (4) is larger than the bottom diameter of the socket groove outer wall (4).
5. The steel-plastic composite pipe connecting piece according to claim 4, 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 (12), 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 (12);
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 (12), 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 (12).
6. 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.
7. The steel-plastic composite pipe connecting piece according to claim 1, wherein two observation holes (6) corresponding to the socket grooves (2) at the two ends of the connecting piece body (1) are formed in the outer wall (10) of the connecting piece body, and the observation holes (6) penetrate through the outer wall (10) of the connecting piece body.
8. The steel-plastic composite pipe connecting piece according to claim 7, wherein the center lines of the two observation holes (6) are perpendicular to the center line of the connecting piece body (1), and the distance from the center line of each observation hole (6) to the bottom of the corresponding socket groove (2) is the radius of the observation hole (6).
9. The steel-plastic composite pipe connecting piece according to claim 8, wherein a circle of trapezoidal positioning grooves (7) are arranged on the outer wall (10) of the connecting piece body along the circumferential direction of the connecting piece body (1).
10. The steel-plastic composite pipe coupling according to claim 9, wherein the coupling body inner wall (9) is provided at both ends with stainless steel support sleeves (8) for preventing deformation of the socket groove inner wall (3).
11. The steel-plastic composite pipe connector as claimed in claim 10, wherein the connector body outer wall (10) is provided with a rib plate (13) for increasing the strength of the steel-plastic composite pipe connector, and the rib plate (13) is provided along the axial direction of the connector body (1).
12. The steel-plastic composite pipe connecting piece according to claim 11, wherein two circles of identification protrusions (14) are provided on the outer wall (10) of the connecting piece body along the circumferential direction of the connecting piece body (1), one circle of identification protrusions (14) is located between the bottom of the socket groove (2) at one end of the connecting piece body (1) and the trapezoidal positioning groove (7), and the other circle of identification protrusions (14) 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 (7).
13. The steel-plastic composite pipe connecting piece according to claim 12, wherein the outer wall (10) of the connecting piece body is provided with two circles of cooling protrusions (15) along the circumferential direction of the connecting piece body (1), one circle of cooling protrusions (15) 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 (15) 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.
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| CN201611090605.XA CN106402524B (en) | 2016-11-30 | 2016-11-30 | Steel-plastic composite pipe connector |
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| CN201611090605.XA CN106402524B (en) | 2016-11-30 | 2016-11-30 | Steel-plastic composite pipe connector |
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| CN106402524B true CN106402524B (en) | 2020-11-06 |
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| CN107575575A (en) * | 2017-07-25 | 2018-01-12 | 盐城美希密封件有限公司 | A kind of sleeve type seal piece |
| CN107289207A (en) * | 2017-08-23 | 2017-10-24 | 湖北大洋塑胶有限公司 | A kind of steel-plastics composite pipe Electromagnetic Heating welding connector |
| CN113864559B (en) * | 2021-09-28 | 2023-05-12 | 临海伟星新型建材有限公司 | Electric smelting pipe fitting with barrier function and manufacturing method thereof |
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| JP2670745B2 (en) * | 1994-02-07 | 1997-10-29 | 東亜高級継手バルブ製造株式会社 | Thermoplastic pipe joint fusing device |
| 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 |
| CN202546053U (en) * | 2012-04-20 | 2012-11-21 | 杨蒙 | Fastening type connecting pipe fitting of electro-magnetic induction welded steel-plastic complex 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 |
| CN206206835U (en) * | 2016-11-30 | 2017-05-31 | 罗贤想 | A kind of steel plastic compount pipe connections |
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Effective date of registration: 20200515 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 |
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