CN215335120U

CN215335120U - Anti-shearing 3PE (polyethylene) anticorrosive steel-plastic adapter

Info

Publication number: CN215335120U
Application number: CN202120443922.5U
Authority: CN
Inventors: 吴志峰; 姜锐涛; 左添源; 潘浩; 杨丽慧
Original assignee: Shanghai George Fischer Chinaust Plastics Fittings Corp ltd
Current assignee: Shanghai George Fischer Chinaust Plastics Fittings Corp ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2021-12-28
Anticipated expiration: 2031-03-01

Abstract

The application discloses crossover sub is moulded to anticorrosive steel of 3PE of anti-shear relates to and buries ground plastic conduit field. The heat-shrinkable sleeve comprises a steel pipe fitting, a PE (polyethylene) fitting, a clamping ring, a 3PE heat-shrinkable sleeve and a PE shear-resistant sleeve. The PE part is provided with a first end and a second end which are different in diameter size and are in transition through a conical surface, and reinforcing ribs are arranged at the joint of the first end and the conical surface. The PE anti-shearing sleeve is sleeved at the position, corresponding to the joint of the PE and the steel pipe, in the 3PE heat-shrinkable sleeve, and a gap is reserved between the PE anti-shearing sleeve and the 3PE heat-shrinkable sleeve. The reinforcing rib is arranged at the joint of the first end of the PE part and the conical surface, so that the problems of stress concentration and weak points at the transition position are solved. The PE anti-shearing sleeve pipe avoids the problem of PE part fracture caused by impact or scratch of a PE part at the steel-plastic transition part, reduces the later maintenance cost of a gas pipe network and reduces potential safety hazards.

Description

Anti-shearing 3PE (polyethylene) anticorrosive steel-plastic adapter

Technical Field

The application relates to the field of buried plastic pipelines, in particular to a shear-resistant 3PE anti-corrosion steel-plastic adapter.

Background

At present, in the field of fluid conveying pipelines such as gas pipelines, common pipelines are steel metal pipelines and plastic pipelines made of Polyethylene (PE). Among them, metal pipes are generally used for medium and high pressure fluid transportation systems, and plastic pipes are generally used for low pressure fluid transportation. The state-related engineering code states that plastic pipes are not allowed to enter directly into the user's room. Therefore, when a high-pressure pipeline is transited to a low-pressure pipeline, and when a plastic pipeline enters a house from a garden pipe, a steel-plastic conversion joint is generally required.

In recent years, 3PE steel-plastic crossover joints have been used in large quantities in the fields of gas transportation and thermal power supply water pipelines. The 3PE steel-plastic conversion joint is formed by adding a PEX heat-shrinkable sleeve on the outer surface of a steel pipe section of a common steel-plastic conversion joint. The ordinary steel-plastic adapter comprises: the steel end, the PE plastic end and the metal clamping ring are connected together.

Limited by the structure, the PE plastic end at the steel-plastic conversion part of the 3PE steel-plastic conversion joint is the weak point of stress concentration, and is easy to damage in the transportation, construction and use processes, thereby causing certain influence on the operation safety of a pipe network.

SUMMERY OF THE UTILITY MODEL

It is an object of the present application to overcome the above problems or to at least partially solve or mitigate the above problems.

The application provides a crossover sub is moulded to anticorrosive steel of 3PE of anti-shear includes:

the steel pipe fitting is provided with an inner wall and an outer wall, the outer wall is divided into a steel-plastic connecting part and a steel end connecting part, a pull-out preventing structure is arranged at the steel-plastic connecting part, and the steel end connecting part is used for connecting a metal pipeline;

the PE part is provided with a first end and a second end which are different in diameter size, the first end and the second end are in transition through a conical surface, the first end is used for being connected with a plastic pipeline, the second end is used for being sleeved at the connecting part of the steel end, and a reinforcing rib is arranged at the connecting part of the first end and the conical surface;

the clamping ring is sleeved at the second end of the PE part;

the 3PE heat-shrinkable sleeve is at least arranged along part of the outer surface of the first end of the PE piece, the outer surface of the clamping ring and the outer surface of the steel end connecting part; and

and the PE anti-shearing sleeve is sleeved at the position, corresponding to the joint part of the PE piece and the steel pipe piece, in the 3PE heat-shrinkable sleeve, and a gap is reserved between the PE anti-shearing sleeve and the 3PE heat-shrinkable sleeve.

Optionally, the PE shear sleeve is lathed from SDR11 or SDR9 series PE tubing.

Optionally, the number of the reinforcing ribs is multiple and is uniformly distributed along the circumferential direction of the first end.

Optionally, the mouth of the second end of the PE member forms an oblique angle, the end of the oblique angle forms a boss, the clamping ring abuts against the boss, and the 3PE heat shrinkable sleeve is further disposed along the outer surface of the oblique angle.

Optionally, the bevel is biased from the outer wall to the inner wall of the PE piece.

Optionally, the height of the boss is consistent with the outer diameter of the clamping ring.

Optionally, the anti-pulling-out structure is an annular barb arranged on the steel-plastic connecting part.

Optionally, the 3PE anticorrosive steel-plastic crossover sub further comprises a sealing structure disposed at the steel-plastic connection portion for sealing the connection portion of the steel pipe fitting and the PE fitting.

Optionally, the sealing structure comprises:

the groove is formed at the front end of the steel-plastic connecting part and is provided with an annular groove along the circumferential direction; and

and the O-shaped sealing ring is arranged in the groove.

The utility model provides a crossover sub is moulded to anticorrosive steel of 3PE of anti-shear, including steel pipe fitting, PE spare, clamping ring, 3PE thermal shrinkable sleeve and the anti-shear sleeve pipe of PE. The reinforcing rib is arranged at the joint of the first end of the PE part and the conical surface, so that the problems of stress concentration and weak points at the transition position are solved. The PE anti-shearing sleeve pipe avoids the problem of PE part fracture caused by impact or scratch of a PE part at the steel-plastic transition part, reduces the later maintenance cost of a gas pipe network and reduces potential safety hazards.

The above and other objects, advantages and features of the present application will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the present application will be described in detail hereinafter by way of illustration and not limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

FIG. 1 is a schematic cross-sectional view of a shear resistant 3PE corrosion resistant steel-plastic crossover joint according to one embodiment of the present application;

fig. 2 is a schematic cross-sectional view taken along a sectional line a-a in fig. 1.

The symbols in the drawings represent the following meanings:

100 anti-shearing 3PE anti-corrosion steel-plastic conversion joint,

PE part, 11 first end, 12 second end, 13 conical surface, 14 reinforcing ribs, 15 bevel angles, 16 boss,

2. a steel pipe, a 21 steel-plastic connecting part, a 22 steel end connecting part, a 23 anti-pulling-out structure, a 24 sealing structure,

3. the clamping ring is provided with a clamping ring,

4.3 the thermal shrinkage sleeve of PE,

PE shear-resistant sleeves.

Detailed Description

Fig. 1 is a schematic cross-sectional view of a shear resistant 3PE corrosion resistant steel-plastic crossover joint according to one embodiment of the present application. Fig. 2 is a schematic cross-sectional view taken along a sectional line a-a in fig. 1. Referring also to fig. 2, as shown in fig. 1, the present embodiment provides a shear-resistant 3PE corrosion-resistant steel-plastic crossover joint 100, which may generally include a steel pipe 2, a PE member 1, a clamping ring 3, a 3PE heat-shrinkable sleeve 4 and a PE shear-resistant sleeve 5. The steel pipe 2 has an inner wall and an outer wall. The outer wall is divided into a steel-plastic connecting part 21 and a steel end connecting part 22. The steel-plastic connecting part 21 is provided with an anti-pull-out structure 23. The steel end connection 22 is used for connecting metal pipes. The PE member 1 has a first end 11 and a second end 12 of non-uniform diameter dimensions. The first end 11 and the second end 12 transition by a tapered surface 13. The first end 11 is for connection to a plastic pipe. The second end 12 is adapted to be fitted around the steel end connection 22. A rib 14 is provided at the first end 11 at the junction with the tapered surface 13. The clamping ring 3 is fitted around the second end 12 of the PE part 1. The 3PE heat shrinkable sleeve 4 is arranged along at least part of the outer surface of the first end 11 of the PE member 1, the outer surface of the clamping ring 3 and the outer surface of the steel end connecting part 22. The PE anti-shearing sleeve 5 is sleeved at the position, corresponding to the joint of the PE part 1 and the steel pipe part 2, in the 3PE heat-shrinkable sleeve 4, and a gap is reserved between the PE anti-shearing sleeve and the 3PE heat-shrinkable sleeve 4.

According to the anti-shearing 3PE anti-corrosion steel-plastic conversion joint 100, the reinforcing ribs 14 are arranged at the joint of the first end 11 of the PE part 1 and the conical surface 13, so that the problems of stress concentration and weak points at the transition position are solved. The PE anti-shearing sleeve 5 avoids the problem that the PE part 1 at the steel-plastic transition part is broken due to impact or scratch, reduces the later maintenance cost of a gas pipe network and reduces the potential safety hazard.

In particular, the PE shear sleeve 5 is lathed from SDR11 or SDR9 series PE tubing. Wherein SDR represents the ratio of pipe diameter to wall thickness. The PE shear sleeve 5 is about 200mm in length. The PE anti-shearing sleeve 5 is simple in shape and convenient to install, made of polyethylene, good in corrosion resistance, capable of well bearing external force impact due to a certain gap with the 3PE heat-shrinkable sleeve 4, free of impact transmission to the PE part 1 at the weak position of the steel-plastic adapter and capable of well protecting the PE part 1 body from impact and scratch. The problem of PE (polyethylene) part 1 fracture caused by scratch and stress concentration at a steel-plastic transition structure is avoided after installation, the later maintenance of a gas pipe network is reduced, and the potential safety hazard is reduced.

Preferably, in this embodiment, an R-angle is provided at the intersection of the first end 11 of the PE member 1 and the tapered surface 13.

More specifically, the reinforcing ribs 14 are plural in number and are uniformly distributed in the circumferential direction of the first end 11. Preferably, in the present embodiment, each reinforcing rib 14 is rectangular, and four reinforcing ribs are circumferentially arranged along the outer diameter of the first end 11 in the length direction of the first end 11 of the PE member 1, so as to solve the problem of stress concentration therein.

In the process of implementing the present application, the inventors found that: in the prior art, filling materials such as viscoelastic bodies, putty and PE rings need to be filled in gaps at the joint of the steel pipe 2 and the PE part 1 in the baking process of the heat shrinkable sleeve, so that more labor cost is wasted, and the 3PE heat shrinkable sleeve 4 is poor in stripping effect at the position due to the fact that the filling materials cannot be fixed, so that a certain influence is caused on an anti-corrosion effect. The problem that the clamping ring 3 cannot be accurately positioned in the press fitting process in the prior art or the problem that metal materials and labor cost are increased due to the fact that the clamping ring needs to be welded to the steel pipe fitting 2 in a metal stop ring mode is solved.

In order to solve the above problem, in this embodiment, the mouth of the second end 12 of the PE member 1 forms a bevel 15, the end of the bevel 15 forms a boss 16, the clamping ring 3 abuts against the boss 16, and the 3PE heat shrinkable sleeve 4 is further disposed along the outer surface of the bevel 15.

By forming the bevel 15 at the mouth of the second end 12 of the PE piece 1, the end of the bevel 15 forms a boss 16, i.e. the PE piece 1 is formed with a self-filling gasket. The problem of among the prior art, need fill filling material such as viscoelastic body, putty, PE circle in steel pipe fitting 2 and the 1 joint gap of PE piece in 3PE pyrocondensation cover 4 baking process needs be solved. The 3PE thermal shrinkable sleeve 4 baked in the application can be well bonded with the bevel 15 in the PE part 1, the problem of weak point of peeling strength in the past is avoided, the corrosion resistance is enhanced, the potential safety hazard is reduced for the operation of a gas pipe network, and the labor cost is saved. Furthermore, the projection 16 of the PE element 1 can function as a stop ring, which makes it easier to position the clamping ring 3 during assembly. The problem of among the prior art clamping ring 3 pressure equipment in-process unable accurate positioning is solved, perhaps, adopt the mode of metal stop ring, need weld to steel pipe fitting 2 on, increased metal material and cost of labor's problem.

More specifically, the bevel 15 is deflected from the outer wall to the inner wall of the PE element 1.

More specifically, the height of the boss 16 corresponds to the outer diameter of the clamping ring 3.

More specifically, the anti-pulling-out structure 23 is an annular barb arranged on the steel-plastic connecting part 21. Of course, other structures capable of preventing the pulling-out can be adopted.

More specifically, the 3PE anti-corrosive steel-plastic crossover sub further comprises a sealing structure 24, which is arranged at the steel-plastic connecting portion 21 and is used for sealing the connecting portion of the steel pipe 2 and the PE part 1 and preventing the leakage of the internally conveyed fluid.

Specifically, the seal structure 24 includes: a groove and an O-shaped sealing ring. A groove is formed at the front end of the steel-plastic connecting portion 21 and provided with an annular groove in the circumferential direction thereof. An O-shaped sealing ring is arranged in the groove.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which this application belongs.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second", etc. 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. In the description of the present application, "a plurality" means two or more unless specifically defined otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a crossover sub is moulded to anticorrosive steel of 3PE of anti-shear, its characterized in that includes:

the clamping ring is sleeved at the second end of the PE part;

2. The 3PE anticorrosive steel-plastic crossover joint of claim 1, wherein the PE shear-resistant sleeve is lathed from PE tubing of SDR11 or SDR9 series.

3. The 3PE anti-corrosive steel-plastic conversion joint according to claim 1, wherein the number of the reinforcing ribs is multiple and is uniformly distributed along the circumferential direction of the first end.

4. The 3PE anti-corrosion steel-plastic adapter according to claim 1, wherein a mouth of the second end of the PE part forms an oblique angle, a boss is formed at the tail end of the oblique angle, the clamping ring abuts against the boss, and the 3PE heat-shrinkable sleeve is further arranged along the outer surface of the oblique angle.

5. The 3PE antiseptic steel-plastic conversion joint according to claim 4 wherein the bevel is skewed from an outer wall to an inner wall of the PE member.

6. The 3PE anti-corrosion steel-plastic conversion joint according to claim 4, wherein the height of the boss is consistent with the outer diameter of the clamping ring.

7. The 3PE antiseptic steel-plastic adapter according to claim 1, wherein the pull-out prevention structure is an annular barb disposed on the steel-plastic connection portion.

8. The 3PE anti-corrosion steel-plastic adapter according to any one of claims 1-7, further comprising a sealing structure arranged at the steel-plastic connecting part for sealing the connecting part of the steel pipe fitting and the PE fitting.

9. The 3PE antiseptic steel-plastic crossover joint of claim 8, wherein the sealing structure comprises:

and the O-shaped sealing ring is arranged in the groove.