CN213656014U - Anti-shearing steel-plastic conversion pipe fitting - Google Patents
Anti-shearing steel-plastic conversion pipe fitting Download PDFInfo
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- CN213656014U CN213656014U CN202022399457.8U CN202022399457U CN213656014U CN 213656014 U CN213656014 U CN 213656014U CN 202022399457 U CN202022399457 U CN 202022399457U CN 213656014 U CN213656014 U CN 213656014U
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Abstract
The utility model provides an anti-shearing steel-plastic conversion pipe fitting, which comprises a steel pipe, a PE pipe fitting, an elastic washer and a lock hoop; the steel pipe is connected with the PE pipe fitting, and a lock hoop is arranged at the joint of the steel pipe and the PE pipe fitting; the lock hoop is provided with two fastening structural forms of an outer lock hoop and an inner lock hoop; the inner lock hoop is arranged in an inner hole of the PE pipe fitting at the joint of the PE pipe fitting and the steel pipe and forms interference fit with the inner hole of the PE pipe fitting to form an inner lock structure; the outer circle surface of the inner lock hoop is provided with a positioning spigot, a positioning groove and a wall-penetrating air-elimination hole; the outer lock hoop is arranged on the outer circle of the joint of the PE pipe fitting and the steel pipe and forms interference fit with the outer circle of the PE pipe fitting, and the outer lock hoop is of an outer lock structure; the length of the steel pipe inserted into the PE pipe fitting is greater than the length of the outer lock hoop installed on the outer wall of the PE pipe fitting. The utility model discloses a with lock hoop, PE pipe fitting and steel pipe handing-over interface not at same interface that connects, can make holistic steel mould change conversion pipe fitting atress even and improve PE pipe fitting intensity, will subside stress and disperse, let the pipe fitting body reduce mechanical stress influence.
Description
Technical Field
The utility model belongs to natural gas pipe network or other fluid transport pipe network fields. Relates to a connecting pipe fitting of a buried PE pipe and a ground steel pipe and a connecting technology of the steel pipe and a plastic pipe, in particular to an anti-shearing steel-plastic conversion pipe fitting.
Background
The steel-plastic conversion pipe fitting is commonly used for natural gas courtyard pipe networks and is a device for connecting a buried PE pipe with an outer wall steel pipe input into a building. After the gas pipe network is installed, the yard backfill ground often sinks to a certain degree along with the time. The steel-plastic conversion pipe fitting mainly adopts PE pipe cutting to make a plastic end, is extruded and thinned by the locking hoop and the steel pipe wall in the process of assembling with the steel end, has strength weaker than that of a connected PE pipe, and a steel-plastic connection interface becomes the weakest part of the whole pipe fitting and a connected pipeline. In this time, the stress of the ground subsidence will act on the pipe, causing the pipe to be damaged or even broken, and causing the damage to the pipe network.
Disclosure of Invention
To the weak point among the prior art, the utility model provides a conversion pipe fitting is moulded to anti-shear steel. The utility model has the characteristics of installation convenient to use, joint strength is high and the seal is good.
In order to achieve the above purpose, the utility model discloses technical scheme as follows:
a shear-resistant steel-plastic conversion pipe fitting comprises a steel pipe, a PE pipe fitting, an elastic washer and a lock hoop; the steel pipe is connected with the PE pipe fitting, the steel pipe is provided with a steel pipe joint which has two connection modes of external locking connection and internal locking connection, the steel pipe is provided with a steel pipe joint which is provided with a plurality of ring groove structures,
the PE pipe fitting is provided with a PE pipe fitting inner hole, and a stress ring structure is arranged at the overlapped part of the PE pipe fitting inner hole or the PE pipe fitting excircle and the steel pipe and is matched with the steel pipe joint ring groove; a lock hoop is arranged at the joint of the steel pipe and the PE pipe fitting; the lock hoop is provided with an outer lock hoop and an inner lock hoop which are respectively applied to corresponding inner lock and outer lock connecting structures; the PE pipe fitting, the steel pipe wall and the lock hoop wall mutually generate extrusion stress under the action of the stress ring structure to achieve a fastening effect, so that the connection strength and the tightness are ensured; the extrusion stress is concentrated on the stress ring structure arranged on the PE pipe fitting, so that the influence of mechanical force on the pipe fitting body is dispersed, and the strength of the steel-plastic connecting part is not less than that of the connected PE pipeline;
when the PE pipe fitting adopts an inner lock hoop to realize inner lock connection, the ring groove structure is arranged in an inner hole of the steel pipe; the inner lock hoop is arranged at the inner hole of the PE pipe fitting at the joint of the PE pipe fitting and the steel pipe and forms interference fit to form an inner lock structure; the length of the inner lock hoop at the end of the PE pipe fitting exceeds the length of the overlapped interface of the steel pipe and the PE pipe fitting, the inner lock hoop is inserted into the steel pipe, and the inner lock hoop is limited by a positioning spigot on the outer circular surface of the inner lock hoop; the outer circle surface of the inner lock hoop is also provided with a positioning groove and a wall-penetrating air-eliminating hole; axially extending the plastic end of the inner lock hoop to exceed the section of the steel end, and inserting the plastic end of the inner lock hoop into an inner hole of the steel end to form a stressed support;
when the PE pipe fitting adopts an external lock hoop to realize external lock connection, the ring groove structure is arranged on the outer circle of the steel pipe; the outer lock hoop is arranged on the outer circle of the joint of the PE pipe fitting and the steel pipe and forms interference fit with the outer circle of the PE pipe fitting to form an outer lock structure; the length of the steel pipe inserted into the PE pipe fitting exceeds the overlapped interface of the outer locking hoop and the PE pipe fitting; the radial interfaces of the steel pipe, the PE pipe fitting and the outer lock hoop are prevented from being overlapped, so that the PE pipe fitting, the steel pipe and the lock hoop are not in the same interface, and stress concentration is avoided; the inner wall of the outer lock hoop is provided with a positioning groove.
Furthermore, the PE pipe fitting is a special PE pipe fitting for injection molding processing and serves as a plastic end; the pipe wall thickness of the PE pipe fitting is increased at the overlapped part where the PE pipe fitting is connected with the steel pipe, namely the pipe wall thickness of the overlapped part of the PE pipe fitting and the steel pipe is larger than that of the connected part of the PE pipe fitting and the pipeline, the stress ring structure is arranged, and the wall thickness of the connected part of the PE pipe fitting and the pipeline is equal to that of the connected pipeline.
Furthermore, the steel pipe connected with the external locking structure and the internal locking structure and the sealed end face of the PE pipe fitting are provided with elastic gaskets.
Further, the steel pipe is a straight pipe type or a bent pipe type.
Has the advantages that: the utility model provides an anti-shearing steel-plastic conversion pipe fitting, which is characterized in that a PE pipe fitting, a steel pipe and a lock hoop are installed and connected, the inner lock hoop is lengthened to exceed the two end interfaces combined by the steel pipe and the PE pipe fitting and is inserted into the steel pipe to realize the support of the inner wall of the steel pipe; the length of inserting the PE pipe fitting into the steel pipe end of the outer lock hoop exceeds the overlapped surface of the outer lock hoop and the PE pipe fitting, so that the radial interfaces of the steel pipe, the PE pipe fitting and the lock hoop are prevented from being overlapped, the stress of the steel-plastic conversion pipe fitting is enhanced, the shearing strength can be resisted, and the conversion pipe fitting is not easily damaged.
Drawings
FIG. 1 is a schematic view of the three-dimensional exploded structure of the inner lock structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the inner lock structure of the present invention;
FIG. 3 is a schematic sectional view of the external lock structure of the present invention;
fig. 4 is a schematic perspective view of the elbow pipe of the present invention;
FIG. 5 is a schematic diagram of the application environment of the straight pipe of the present invention;
fig. 6 is a schematic view of an application environment of the elbow pipe according to the present invention.
In the figure, 1-steel pipe, 2-elastic washer, 3-air vent, 4-inner locking hoop, 5-PE pipe fitting, 6-outer locking hoop, 7-positioning spigot, 8-ground, 9-pipe network, 10-steel-plastic joint, 11-stress ring structure, 12-positioning groove and 13-air vent.
Detailed Description
The present invention is described below with reference to specific examples. It will be understood by those skilled in the art that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention in any way.
A shear-resistant steel-plastic conversion pipe fitting, as shown in fig. 1 to 6, comprising a steel pipe 1, a PE pipe fitting 5, an elastic washer 2, and a locking hoop;
as shown in fig. 1 to 4, a steel pipe 1 is connected with a PE pipe fitting 5, the steel pipe 1 is provided with a steel pipe joint having two connection forms of an external lock connection and an internal lock connection, the steel pipe is provided with a steel pipe joint, the steel pipe joint is provided with a plurality of ring groove structures,
the PE pipe fitting is provided with a PE pipe fitting inner hole, and a stress ring structure 11 matched with a ring groove at the joint of the PE pipe fitting inner hole or the outer circle of the PE pipe fitting and the steel pipe is arranged at the overlapping part; a lock hoop is arranged at the joint of the steel pipe 1 and the PE pipe fitting 5; the lock hoop is provided with an outer lock hoop 6 and an inner lock hoop 4 which are respectively applied to corresponding inner lock and outer lock connecting structures; the PE pipe fitting 5, the steel pipe wall and the lock hoop wall mutually generate extrusion stress under the action of the stress ring structure 11 to achieve a fastening effect, so that the connection strength and the tightness are ensured; the extrusion stress is concentrated on the stress ring structure 11 arranged on the PE pipe fitting 5, so that the influence of mechanical force on the pipe fitting body is dispersed, and the strength of the steel-plastic connecting part is not less than that of the connected PE pipeline;
when the PE pipe fitting 5 adopts the inner lock hoop to realize the inner lock connection, the ring groove structure is arranged in the inner hole of the steel pipe; the inner lock hoop 4 is arranged at the inner hole of the PE pipe fitting at the joint of the PE pipe fitting 5 and the steel pipe and forms interference fit to form an inner lock structure; the length of the inner lock hoop 4 at the end of the PE pipe fitting 5 exceeds the length of the overlapped interface of the steel pipe 1 and the PE pipe fitting 5, the inner lock hoop is inserted into the steel pipe 1 for enough length, and the position is limited by a positioning spigot 7 on the outer circular surface of the inner lock hoop; the outer circle surface of the inner lock hoop 4 is also provided with a positioning groove 12 and a wall-penetrating air-eliminating hole 13; axially extending the plastic end of the inner lock hoop 4 to exceed the section of the steel end, and inserting the plastic end into an inner hole of the steel end to form a stressed support;
when the PE pipe fitting 5 adopts the outer lock hoop 6 to realize the outer lock connection, the ring groove structure is arranged on the outer circle of the steel pipe; the outer lock hoop 6 is arranged on the outer circle of the joint of the PE pipe fitting 5 and the steel pipe and forms interference fit with the outer circle of the PE pipe fitting 5 to form an outer lock structure; the length of the steel pipe 1 inserted into the PE pipe fitting 5 exceeds the overlapped interface of the outer lock hoop 6 and the PE pipe fitting; the radial interfaces of the steel pipe 1, the PE pipe fitting 5 and the outer lock hoop 6 are prevented from being overlapped, so that the PE pipe fitting, the steel pipe and the lock hoop are not in the same interface, and stress concentration is avoided; the inner wall of the outer lock hoop 6 is provided with a positioning groove.
Further, the PE pipe fitting 5 adopts a special PE pipe fitting 5 for injection molding processing as a plastic end; the pipe wall thickness of the PE pipe fitting 5 is increased at the overlapped part where the PE pipe fitting 5 is connected with the steel pipe 1, namely, the pipe wall thickness of the overlapped part of the PE pipe fitting 5 and the steel pipe is larger than that of the connected part of the PE pipe fitting 5 and the pipeline, and the stress ring structure 11 is arranged, and the wall thickness of the connected part of the PE pipe fitting 5 and the pipeline is equal to that of the connected pipeline.
Furthermore, the steel pipe connected with the external locking structure and the internal locking structure and the sealed end surface of the PE pipe fitting 5 are provided with elastic gaskets 2.
Further, the steel pipe 1 is a straight pipe type or a bent pipe type.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
As shown in fig. 5 and 6, the application scenarios of the straight tube type steel pipe and the bent tube type steel pipe are schematically illustrated; wherein, the steel-plastic joints 10 of the straight tube type steel tubes and the bent tube type steel tubes are all arranged below the ground 8; the outer ends of the PE pipe fittings 5 are connected with a pipe network 9; the outer ends of the steel pipes 1 are respectively connected with outer wall steel pipes.
Claims (4)
1. The utility model provides a switching tube spare is moulded to anti-shear steel which characterized in that: the pipe fitting comprises a steel pipe, a PE pipe fitting, an elastic washer and a lock hoop; the steel pipe is connected with the PE pipe fitting and has two connection forms of external locking connection and internal locking connection, the steel pipe is provided with a steel pipe joint, the steel pipe joint is provided with a plurality of ring groove structures,
the PE pipe fitting is provided with a PE pipe fitting inner hole, and a stress ring structure is arranged at the overlapped part of the PE pipe fitting inner hole or the PE pipe fitting excircle and the steel pipe and is matched with the steel pipe joint ring groove; a lock hoop is arranged at the joint of the steel pipe and the PE pipe fitting; the lock hoop is provided with an outer lock hoop and an inner lock hoop; the PE pipe fitting, the steel pipe wall and the lock hoop wall mutually generate extrusion stress under the action of the stress ring structure to achieve a fastening effect, so that the connection strength and the tightness are ensured;
when the PE pipe fitting adopts an inner lock hoop to realize inner lock connection, the ring groove structure is arranged in an inner hole of the steel pipe; the inner lock hoop is arranged at the inner hole of the PE pipe fitting at the joint of the PE pipe fitting and the steel pipe and forms interference fit to form an inner lock structure; the length of the inner lock hoop at the end of the PE pipe fitting exceeds the length of the overlapped interface of the steel pipe and the PE pipe fitting, the inner lock hoop is inserted into the steel pipe, and the inner lock hoop is limited by a positioning spigot on the outer circular surface of the inner lock hoop; the outer circle surface of the inner lock hoop is also provided with a positioning groove and a wall-penetrating air-eliminating hole;
when the PE pipe fitting adopts an external lock hoop to realize external lock connection, the ring groove structure is arranged on the outer circle of the steel pipe; the outer lock hoop is arranged on the outer circle of the joint of the PE pipe fitting and the steel pipe and forms interference fit with the outer circle of the PE pipe fitting to form an outer lock structure; the length of the steel pipe inserted into the PE pipe fitting exceeds the overlapped interface of the outer locking hoop and the PE pipe fitting; the inner wall of the outer lock hoop is provided with a positioning groove.
2. The shear resistant steel-plastic conversion pipe fitting according to claim 1, wherein the PE pipe fitting is a PE pipe fitting dedicated for injection molding as a plastic end; the pipe wall thickness of the PE pipe fitting is increased at the overlapped part where the PE pipe fitting is connected with the steel pipe, namely the pipe wall thickness of the overlapped part of the PE pipe fitting and the steel pipe is larger than that of the connected part of the PE pipe fitting and the pipeline, the stress ring structure is arranged, and the wall thickness of the connected part of the PE pipe fitting and the pipeline is equal to that of the connected pipeline.
3. The shear-resistant steel-plastic conversion pipe fitting according to claim 1, wherein the steel pipe connected with the external locking structure and the internal locking structure and the sealed end surface of the PE pipe fitting are provided with elastic gaskets.
4. The shear resistant steel-plastic conversion pipe fitting according to claim 1, wherein the steel pipe is a straight pipe type or a bent pipe type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022399457.8U CN213656014U (en) | 2020-10-26 | 2020-10-26 | Anti-shearing steel-plastic conversion pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022399457.8U CN213656014U (en) | 2020-10-26 | 2020-10-26 | Anti-shearing steel-plastic conversion pipe fitting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213656014U true CN213656014U (en) | 2021-07-09 |
Family
ID=76703283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022399457.8U Active CN213656014U (en) | 2020-10-26 | 2020-10-26 | Anti-shearing steel-plastic conversion pipe fitting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213656014U (en) |
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2020
- 2020-10-26 CN CN202022399457.8U patent/CN213656014U/en active Active
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