CN212510007U - Pipe fitting and composite pipe fitting - Google Patents

Pipe fitting and composite pipe fitting Download PDF

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Publication number
CN212510007U
CN212510007U CN202021038924.8U CN202021038924U CN212510007U CN 212510007 U CN212510007 U CN 212510007U CN 202021038924 U CN202021038924 U CN 202021038924U CN 212510007 U CN212510007 U CN 212510007U
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CN
China
Prior art keywords
pipe fitting
gasket
threaded insert
internal
pipe
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Active
Application number
CN202021038924.8U
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Chinese (zh)
Inventor
郑宇�
阮成福
项宁
曾勇
罗建平
陈飞
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Shanghai Tianli Industrial Group Co ltd
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Shanghai Tianli Industrial Group Co ltd
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Priority to CN202021038924.8U priority Critical patent/CN212510007U/en
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Abstract

The application provides a pipe fitting and composite pipe fitting, including pipe fitting body and screw thread inserts, the at least one end of pipe fitting body is inlayed and is had screw thread inserts, screw thread inserts has first internal face, the pipe fitting body has second internal face and the face of bonding, wherein, first internal face bond the face and the second internal face connects gradually, just first internal face is located the radial outside of second internal face, fixedly connected with packing ring on the face of bonding, the interior anchor ring of packing ring and the interior runner of first internal face formation pipe fitting. Compared with the prior art, can directly use when using, do not need installer extra installation packing ring, simplify the installation, and the installation of packing ring is more firm.

Description

Pipe fitting and composite pipe fitting
Technical Field
The application belongs to the technical field of pipeline connection, and more specifically relates to a pipe fitting and a composite pipe fitting.
Background
The pipe fitting embedded with the threaded insert is a pipe fitting which is connected with a common plastic pipeline through threads, the threaded insert is generally made of metal, and is embedded in a plastic material through injection molding, and the pipe fitting embedded with the threaded insert comprises an external threaded insert and an internal threaded insert. In the prior art, when two plastic pipelines are installed and connected, gaskets are often added to the inner threads and the outer threads of the connecting pipe fitting to seal the end parts, so that the installation process is inconvenient.
Disclosure of Invention
An object of the embodiment of the application is to provide a pipe fitting and a composite pipe fitting for embedding a threaded insert, so as to solve the technical problem that the pipe fitting for embedding the threaded insert in the prior art is not convenient to install.
For realizing above-mentioned purpose, the pipe fitting that this application embodiment provided, including pipe fitting body and screw thread inserts, the at least one end of pipe fitting body is inlayed and is had screw thread inserts, screw thread inserts has first internal face, the pipe fitting body has second internal face and the face of bonding, wherein, first internal face the face of bonding and the second internal face connects gradually, just first internal face is located the radial outside of second internal face, fixedly connected with packing ring on the face of bonding, the interior anchor ring of packing ring with first internal face forms the inner flow way of pipe fitting.
Optionally, an outer annular surface of the gasket is connected to the first inner wall surface.
Optionally, the gasket and the pipe fitting body are made of the same material, and/or the cross section of the gasket along the axial direction of the gasket is rectangular.
Optionally, the threaded insert is an internal threaded insert, a smooth section and a threaded section are formed on a first inner wall surface of the internal threaded insert, the smooth section is connected with the bonding surface, and an outer ring surface of the gasket is connected with the smooth section in a sealing manner.
Optionally, the threaded insert is an external threaded insert, a counter bore is formed at a port of the external threaded insert, and a bore wall of the counter bore forms a first inner wall surface of the external threaded insert.
Optionally, an end surface of the gasket facing away from the bonding surface is flush with an end surface of the counterbore.
Optionally, an inner diameter of the gasket is comparable to an inner diameter of the inner bore corresponding to the second inner wall surface.
Optionally, the gasket is thermally fused to the adhesive surface.
This application on the other hand provides a compound pipe fitting, including a plurality of the above-mentioned pipe fitting, the thread insert of first pipe fitting in a plurality of pipe fittings is the internal thread inserts, it is a plurality of the thread insert of the second pipe fitting in the pipe fitting be with the external thread inserts of internal thread inserts adaptation, the packing ring of first pipe fitting is first packing ring, the packing ring of second pipe fitting is the second packing ring, first pipe fitting with the second pipe fitting passes through when the thread section of internal thread inserts with the external thread inserts meshes, first packing ring with the pressfitting of second packing ring is connected, first pipe fitting the interior runner with the second pipe fitting the interior runner intercommunication forms to be sealed first pipe fitting first internal face with the second pipe fitting the compound interior runner of first internal face.
The application provides a check device beneficial effect lies in:
the mode that the packing ring adopted fixed connection with the bonding portion of pipe fitting body in this application constitutes a whole with pipe fitting body, screw thread inserts, can directly use when using, does not need the extra installation packing ring of installer for the installation becomes more convenient, and the installation of packing ring is more firm. Meanwhile, the integrated gasket is adopted, so that the condition that the gasket is lost does not exist during disassembly.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a pipe fitting with an internal threaded insert according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a pipe fitting with an externally threaded insert according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a composite pipe provided in an embodiment of the present application.
Wherein, in the figures, the respective reference numerals:
1-a pipe fitting; 11-a tube body; 12-a threaded insert; 13-embedding holes; 14-an adhesive portion; 15-a gasket; 2-composite pipe fitting; 21-a first tubular member; 22-a second tubular; and 3, a mold core.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 and 2, a pipe fitting 1 provided in an embodiment of the present application includes a pipe fitting body 11 and a threaded insert 12, the threaded insert 12 is embedded in at least one end of the pipe fitting body 11, the threaded insert 12 has a first inner wall surface, the pipe fitting body 11 has a second inner wall surface and a bonding surface, the first inner wall surface, the bonding surface, and the second inner wall surface are sequentially connected, the first inner wall surface is located on a radial outer side of the second inner wall surface, a gasket 15 is fixedly connected to the bonding surface, and an inner annular surface of the gasket 15 and the first inner wall surface form an inner flow channel of the pipe fitting 1.
Referring to fig. 1 and 2, at least one end of the pipe fitting body 11 is formed with an insertion hole 13 for inserting the threaded insert 12, one end of the insertion hole 13 is a closed end, and the other end is an open end, and the insertion hole 13 wraps part of the threaded insert 12, so that the inner wall of the threaded insert 12 is exposed outside the insertion hole 13 to form the first inner wall surface. The pipe fitting body 11 has a through hole for the fluid medium to flow through, and the inner wall of the through hole is a second inner wall surface. It will be appreciated that the inlay holes 13 are annular.
Wherein the threaded insert 12 is embedded in at least one end of the pipe body. For example, threaded inserts 12 are embedded at both ends of the pipe body.
The bonding surface extends along the axial direction of the pipe 1 to form a bonding part 14 with a certain thickness, the bonding surface of the bonding part 14 is perpendicular to the axis of the pipe body 11, and the end surface of the bonding part 14 is far away from the closed end of the embedding hole 13.
In this embodiment, the gasket 15 and the bonding portion 14 of the pipe 1 are fixedly connected to form a whole with the pipe body 11 and the threaded insert 12, and the whole can be directly used during use without requiring an installer to additionally install the gasket 15, so that the installation process is more convenient and the installation of the gasket 15 is more reliable. Meanwhile, with the integrated gasket 15, there is no loss of the gasket 15 during disassembly.
In this embodiment, the tube is a plastic tube, and the bonding surface and the gasket 15 are thermally fused to form a whole. The pipe may be a metal pipe, a ceramic pipe, or the like, and the bonding surface may be fixedly connected to the gasket 15 by gluing, welding, or the like, which also falls within the scope of the present application.
Further, the outer annular surface of the washer 15 is connected to the first inner wall surface of the threaded insert 12. When the threaded insert 12 is an internal threaded insert, a smooth section and a threaded section are formed on a first inner wall surface of the internal threaded insert, the smooth section is connected with the bonding surface, and an outer ring surface of the gasket is connected with the smooth section in a sealing mode. At this time, the diameter d of the outer annular surface of the washer 15 corresponds to the diameter of the smooth section of the bottom hole of the internally threaded insert.
When the threaded insert 12 is an external threaded insert, a counter bore is formed at the end port of the external threaded insert, the hole wall of the counter bore is a first inner wall surface, and the counter bore is arranged to be beneficial to forming a bonding surface with a certain area. At this time, the outer annular surface diameter d of the washer 15 corresponds to the port counterbore inner diameter of the pin insert.
The end face of the gasket, which deviates from the bonding face, is flush with the end face of the counter bore, so that the problem that the gasket is easily damaged when the end face of the gasket is higher than the end face of the counter bore can be effectively avoided, and the axial positioning during processing is facilitated.
In this case, a plastic-coated sealing connection can be achieved during the injection molding process for the first inner wall surface of the threaded insert 12 by means of the gasket 15.
When the threaded insert 12 is an internal threaded insert, the first inner wall surface of the internal threaded insert includes a threaded section and the smooth section, the smooth section is connected to the bonding surface of the bonding portion 14, and preferably, the end surface of the gasket 15 is flush with the connection interface between the threaded section and the smooth section of the internal threaded insert. When the threaded insert 12 is a male threaded insert, the first inner wall surface of the male threaded insert is a smooth section, preferably, the end surface of the smooth section of the male threaded insert is flush with the end surface of the washer 15. The connection length of the pipe fitting 1 embedded with the external thread insert and the pipe fitting 1 embedded with the internal thread insert is maximized, and the connection stability is ensured.
In the injection molding process, the gasket 15 is sleeved at the step of the mold core 3, and the first inner wall surface of the threaded insert 12 is tightly sleeved on the outer ring surface of the gasket 15, so that the injection molding tail end is sealed, molten plastic is prevented from overflowing, and the requirement that the plastic coverage of the first inner wall surface is stable and reliable is met.
In this embodiment, through the first internal face sealing connection of packing ring 15 with thread insert 12, when the pipe fitting 1 of inlaying the internal thread insert is connected with the pipe fitting 1 of inlaying the external thread insert, the first internal face of internal thread insert, the first internal face of external thread insert all realizes keeping apart with the circulation medium in the pipe fitting 1 through packing ring 15, the first internal face of thread insert 12 all not with intraductal circulation medium direct contact promptly, the contact of flowing medium and thread insert 12 in the pipeline has been sealed, the corruption and the harmful substance of thread insert 12 material have been avoided and have been precipitated. Therefore, through the pipe fitting 1 provided by the embodiment of the application, the surface protection treatment is not required to be implemented on the first inner avoiding part of the threaded insert 12, the manufacturing cost of the pipe fitting is reduced, and the environmental protection pressure is reduced.
Preferably, the section of the gasket 15 along the axial direction is rectangular, which is beneficial to better realize the end sealing in the injection molding process through the matching of the gasket 15 and the threaded insert 12, and is convenient for the full and controllable hot melt connection in the injection molding process.
Preferably, the gasket 15 is made of the same material as the pipe body 11. It should be emphasized that, when the gasket 15 is made of the same material as the pipe 1, the first inner wall surface of the pipe 1 has the same sanitary performance as that of the pipe 1, and the new first inner wall surface formed by the pipe body 11 and the gasket 15 also has the same sanitary performance and corrosion resistance as those of the pipe body 11, which meet the requirement of the sanitary performance and corrosion resistance of the pipe body in contact with drinking water, thereby being beneficial to reducing the environmental protection pressure.
In a preferred embodiment, the inner diameter of the gasket 15 is equal to the inner diameter of the inner hole corresponding to the second inner wall surface, which is beneficial to preventing the flowing medium in the pipe body from washing the gasket 15 and the part of the bonding part 14, and reducing the probability of damage to the pipe body.
Preferably, the height a of the gasket 15 is not less than 2mm and not more than 6mm, for example 3mm, 4mm, 5 mm.
Preferably, the length B of the bonding part 14 along the axial direction of the pipe fitting 1 is not less than 0.5mm, so that the injection molding and the hot melt bonding are favorably realized, and the bonding is effective.
Preferably, the width of the gasket 15 is the same as the width of the adhesive portion 14, which is advantageous in maintaining the adhesive effect. Wherein the width of the washer 15 refers to the width in radial cross-section. Similarly, the width of the bonding portion 14 refers to the width in the radial cross section.
The embodiment of the present application provides a method for processing the above pipe fitting 1, where the pipe fitting 1 is a plastic pipe fitting, and the method includes:
sequentially arranging a gasket 15 and a threaded insert 12 on a mold core 3 in a mold cavity of an injection mold, wherein the mold core 3 is provided with a step surface, the step surface is flush with a port of the inner flow passage, the gasket 15 is sleeved on a small shaft section of the mold core 3 and is abutted against the step surface, the small shaft section of the mold core 3 extends into the injection mold, and an injection molding gap at least exists between the outer diameter of the small shaft section of the mold core 3 and the inner wall of the threaded insert 12;
injecting molten plastic;
and maintaining the pressure.
The mold core 3 has a large shaft section and a small shaft section, and the diameter of the large shaft section is larger than that of the small shaft section. The step surface is formed at the joint of the large shaft section and the small shaft section, the step surface is flush with the port of the inner flow passage, the gasket 15 is sleeved on the small shaft section, and the end surface of the gasket 15, which is far away from the bonding part 14, is abutted against the step surface. It will be appreciated that the end face of the gasket 15 facing away from the bonding portion 14 is now flush with the port of the inner flow passage.
Wherein the port of the inner flow channel is flush with the end surface of the gasket 15 facing away from the bonding surface.
The diameter of the small shaft section of the mold core 3 is the same as the drift diameter D of the inner flow channel, and the minimum distance between the wall surface of the small shaft section of the mold core 3 and the inner wall of the inner hole of the threaded insert 12 is not less than 0.2mm, so that the injection molding gap at least not less than 0.2mm is ensured, and the injection molding flow is stable and reliable.
During installation, the gasket 15 is sleeved on the step surface of the mold core 3, and radial positioning is realized through the mold core 3. The outer circumferential surface of the washer 15 cooperates with the inner bore of the threaded insert 12 to effect axial positioning of the washer 15 so that an injection molding end seal is possible with the washer 15 to prevent molten plastic from escaping.
After the injection mold is prepared, the injection molding machine is started to start injecting the molten plastic. The plastic is PP-R plastic, and when the plastic is subjected to injection molding processing, the temperature of the molten PP-R plastic is as high as more than 200 ℃ and exceeds the melting point (less than or equal to 148 ℃) of the PP-R plastic, and during the pressure maintaining period (generally more than 10 seconds) after the injection molding and shaping, the gasket 15 can be thermally welded with the bonding part 14 of the pipe fitting body 11, so that plastic coating isolation is realized. The gasket 15 may be made of an environment-friendly plastic having a melting point lower than the melting temperature.
When the threaded insert 12 is an internal threaded insert, the starting surface of the threaded segment of the internal threaded insert is flush with the step surface, i.e., the connection interface between the smooth segment and the threaded segment is flush with the step surface. When the threaded insert 12 is a male threaded insert, the end face of the male threaded insert is flush with the step face.
It will be appreciated that the above processing method also includes stripping and post-treatment after dwell.
In the embodiment, the hot melting connection of the bonding part 14 and the gasket 15 is completed simultaneously in the plastic coating and injection molding process of the threaded insert 12, so that the processing procedure of the pipe fitting 1 is simplified.
Referring to fig. 3, an embodiment of the present application further provides a composite pipe fitting 2, including a plurality of pipe fittings 1 as described above, an internal thread insert is embedded in a first pipe fitting 21 of the plurality of pipe fittings 1, an external thread insert is embedded in a second pipe fitting 22, the thread insert 12 of the second pipe fitting 22 is an external thread insert adapted to the internal thread insert, the gasket 15 of the first pipe fitting 21 is a first gasket, the gasket 15 of the second pipe fitting 22 is a second gasket, when the first pipe fitting 21 and the second pipe fitting 22 are connected by the internal thread insert and the thread section of the external thread insert, the first gasket and the second gasket are press-fit and connected, an internal flow channel of the first pipe fitting 21 is communicated with an internal flow channel of the second pipe fitting 22 to form a composite internal flow channel that seals a first inner wall surface of the first pipe fitting 21 and a first inner wall surface of the second pipe. The first gasket and the second gasket are pressed together, so that the flowing medium in the pipeline cannot contact the first inner wall surface of the threaded insert 12, the pollution of the first inner wall surface material of the threaded insert 12 to the flowing medium is avoided, and the environmental protection pressure is reduced. Since the composite pipe 2 is formed by the pipe 1, all the advantages of the pipe 1 are achieved, which is not described herein.
It is understood that the composite pipe 2 further comprises a third pipe, a fourth pipe, etc., and the first pipe 21, the second pipe 22, the third pipe, and the fourth pipe are connected end to end in sequence by means of the threaded insert fittings.
Alternatively, the end faces of the gasket 15 of the first pipe member 21 and the end face of the gasket 15 of the second pipe member 22 are pressed together.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims (10)

1. The utility model provides a pipe fitting, its characterized in that, includes pipe fitting body and screw thread inserts, at least one end of pipe fitting body is inlayed and is had the screw thread inserts, the screw thread inserts has first internal face, the pipe fitting body has second internal face and bonding face, wherein, first internal face the bonding face and the second internal face connects gradually, just first internal face is located the radial outside of second internal face, fixedly connected with packing ring on the bonding face, the interior anchor ring of packing ring with first internal face forms the inner flow way of pipe fitting.
2. A fitting according to claim 1, wherein an outer annular surface of said gasket is connected to said first inner wall surface.
3. A pipe according to claim 1, wherein said gasket is of the same material as said pipe body, and/or wherein said gasket has a rectangular cross-section in the axial direction of said gasket.
4. The fitting according to claim 3, wherein the threaded insert is an internally threaded insert having a smooth section and a threaded section formed on a first inner wall surface, the smooth section being coupled to the bonding surface, and an outer annular surface of the gasket being sealingly coupled to the smooth section.
5. The fitting according to claim 3, wherein the threaded insert is a male threaded insert, a port of the male threaded insert being formed with a counterbore, a bore wall of the counterbore forming a first inner wall surface of the male threaded insert.
6. A tube according to claim 5, wherein the end face of the washer facing away from the bonding face is flush with the end face of the counterbore.
7. A tube according to any one of claims 1-6, characterized in that the inner diameter of the washer corresponds to the inner diameter of the inner bore of the second inner wall surface.
8. A tube according to any one of claims 1 to 6, wherein said gasket is heat fused to said bonding surface.
9. The fitting according to claim 8, wherein the fitting body is formed from PP-R plastic and the gasket is formed from PP-R plastic.
10. A composite pipe fitting comprising a plurality of pipe fittings according to claim 1, wherein the threaded insert of a first pipe fitting of the plurality of pipe fittings is an internally threaded insert, the threaded insert of a second pipe fitting of the plurality of pipe fittings is an externally threaded insert adapted to the internally threaded insert, the gasket of the first pipe fitting is a first gasket, the gasket of the second pipe fitting is a second gasket, the first gasket and the second gasket are in press fit connection when the first pipe fitting and the second pipe fitting are engaged by the internally threaded insert and the threaded section of the externally threaded insert, and the inner flow passage of the first pipe fitting is communicated with the inner flow passage of the second pipe fitting to form a composite inner flow passage for closing the first inner wall surface of the first pipe fitting and the first inner wall surface of the second pipe fitting.
CN202021038924.8U 2020-06-08 2020-06-08 Pipe fitting and composite pipe fitting Active CN212510007U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021038924.8U CN212510007U (en) 2020-06-08 2020-06-08 Pipe fitting and composite pipe fitting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021038924.8U CN212510007U (en) 2020-06-08 2020-06-08 Pipe fitting and composite pipe fitting

Publications (1)

Publication Number Publication Date
CN212510007U true CN212510007U (en) 2021-02-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021038924.8U Active CN212510007U (en) 2020-06-08 2020-06-08 Pipe fitting and composite pipe fitting

Country Status (1)

Country Link
CN (1) CN212510007U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111677969A (en) * 2020-06-08 2020-09-18 上海天力实业(集团)有限公司 Composite pipe fitting and processing method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111677969A (en) * 2020-06-08 2020-09-18 上海天力实业(集团)有限公司 Composite pipe fitting and processing method thereof
CN111677969B (en) * 2020-06-08 2022-02-11 上海天力实业(集团)有限公司 Composite pipe fitting and processing method thereof

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