CN212839846U

CN212839846U - Long-life pipe fitting for gas

Info

Publication number: CN212839846U
Application number: CN202021682729.9U
Authority: CN
Inventors: 孟庆宇
Original assignee: Hebei Zhongran Pipeline Co ltd
Current assignee: Hebei Zhongran Pipeline Co ltd
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2021-03-30
Anticipated expiration: 2030-08-13

Abstract

The utility model discloses a long-life pipe fitting for gas, which comprises a pipe body and a protection joint, wherein the pipe body comprises a seamless steel pipe and a PE pipe coated outside the seamless steel pipe, two ends of the seamless steel pipe extend out of the PE pipe, and fireproof heat insulation layers in contact with the seamless steel pipe are respectively arranged on the inner walls of two sides of the PE pipe; the protection connects hoop to establish on two adjacent PE pipes, and is concrete, the protection connect include two with PE manages matched with semicircle lamella, link to each other through the bolt between two semicircle lamellas, the utility model discloses in compound through seamless steel pipe and PE pipe use has realized that gas pipeline high pressure is carried and corrosion-resistant dual purpose, and the protection of cooperation protection joint has made things convenient for the connection of pipeline body and the protection of seam crossing in addition.

Description

Long-life pipe fitting for gas

Technical Field

The utility model relates to a pipe fitting field for the gas, concretely relates to long-life pipe fitting for gas.

Background

The existing gas pipe is roughly divided into a seamless steel pipe and a PE pipe, the seamless steel pipe has high pressure bearing capacity, both high-pressure and low-pressure pipelines can be used, but the seamless steel pipe is easy to corrode, the service life of the seamless steel pipe cannot be guaranteed, and the PE pipe has corrosion resistance, long service life but low pressure bearing capacity, so that the gas pipe can only be used as a medium-low pressure pipeline, and therefore, the gas pipe is required to be a gas pipe fitting which has long service life and can meet the use requirement of the high-pressure pipeline.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the background art, the utility model aims to provide a long-life pipe fitting is used in gas, it has effectively solved the problem that exists among the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the long-life gas pipe fitting comprises a pipe body and a protection joint, wherein the pipe body comprises a seamless steel pipe and a PE pipe coated on the outer side of the seamless steel pipe, two ends of the seamless steel pipe extend out of the PE pipe, and fireproof heat insulation layers in contact with the seamless steel pipe are respectively arranged on the inner walls of two sides of the PE pipe; the protection connects hoop to establish on two adjacent PE pipes, specifically, the protection connect include two with PE pipe matched with semicircle lamella links to each other through the bolt between the semicircle lamella.

Furthermore, the material of fire prevention insulating layer is aerogel felt layer.

Furthermore, the fireproof heat insulation layer is annular, and the axial length of the fireproof heat insulation layer is not less than 40 cm.

Further, still cooperate respectively between protection joint and each PE pipe and be provided with seal structure, seal structure sets up including the symmetry annular on the PE pipe is protruding and set up on the protection joint inner wall and with annular protruding matched with annular, the annular fit in is provided with the rubber packing ring.

Furthermore, two sides of the PE pipe are respectively provided with two annular bulges.

Furthermore, the front side and the rear side of the semicircular valve are respectively provided with a connecting lug, and the bolt is positioned on the connecting lugs.

Furthermore, the inner wall of the semicircular flap is also provided with a supporting piece matched with the seamless steel pipe, and the supporting piece comprises a semicircular annular plate contacted with the seamless steel pipe and a rib plate fixedly arranged between the semicircular annular plate and the semicircular flap.

The utility model discloses following beneficial technological effect has:

the utility model discloses in use through seamless steel pipe and PE pipe's complex has realized that gas pipeline high pressure is carried and corrosion-resistant dual purpose, and the cooperation protection connects in addition, has made things convenient for the connection of pipeline body and the protection of seam crossing, has very strong practicality.

Drawings

Fig. 1 is a right side view of a pipe body according to an embodiment of the present invention;

FIG. 2 is a sectional view taken along line A-A in FIG. 1;

FIG. 3 is a top view of an embodiment of the present invention;

fig. 4 is a right side view of a protective structure according to an embodiment of the present invention;

FIG. 5 is a sectional view taken along line B-B of FIG. 4;

fig. 6 is a schematic view of an assembly structure of an embodiment of the present invention;

fig. 7 is a partial enlarged view at C in fig. 6.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 7, the long-life pipe fitting for gas in this embodiment includes a pipe body 1 and a protection joint 2, the pipe body 1 includes a seamless steel pipe 3 and a PE pipe 4 coated outside the seamless steel pipe 3, two ends of the seamless steel pipe 3 extend out of the PE pipe 4, which facilitates welding of adjacent seamless steel pipes 3, and the inner walls of two sides of the PE pipe 4 are respectively provided with a fireproof heat insulation layer 5 contacting with the seamless steel pipe 3, so that adverse effects on the PE pipe 4 caused by temperature rise of the seamless steel pipe 3 when welding the adjacent seamless steel pipes 3 are greatly weakened, and thermal deformation and damage of the PE pipe 4 are avoided; protection connects 2 hoops and establishes on two adjacent PE pipe 4, and is concrete, protection connects 2 include two with PE4 pipe matched with semicircle lamella 6, link to each other through bolt 7 between two semicircle lamella 6, bolt 7 is the PEEK material bolt, and its mechanical strength is high and corrosion-resistant, is fit for burying the ground and uses.

The fireproof heat-insulating layer 5 is made of an aerogel felt layer, the aerogel felt layer is a solid heat-insulating material with the lowest heat conductivity coefficient in the current 400 ℃ temperature region, and has the characteristics of softness, easiness in cutting, low density, inorganic fire resistance, overall hydrophobicity, environmental friendliness and the like, the fireproof heat-insulating layer 5 is in a circular ring shape, the axial length of the fireproof heat-insulating layer is not less than 40cm, when the seamless steel pipes 3 are welded, the joint positions of the adjacent seamless steel pipes 3 are heated and transmitted to other parts of the seamless steel pipes 3, the heat transmission rule is that the temperature is gradually reduced along the axial direction of the seamless steel pipes 3, the fireproof heat-insulating layer 5 protects the PE pipes 4 close to the joint positions of the adjacent seamless steel pipes 3, and the parts of the PE pipes 4 which are prone to heat loss are.

The protective joint 2 is the PE material, it is provided with seal structure still to cooperate respectively between protective joint 2 and each PE pipe 4, prevent to bury ground in the stratum moisture enter protective joint 2 in with the contact of seamless steel pipe 3, seal structure sets up annular protrusion 8 on PE pipe 4 and set up on protective joint 2 inner wall and with annular protrusion 8 matched with annular 9 including the symmetry, the annular 9 fit in is provided with rubber packing ring 10, both sides have twice annular protrusion 8 respectively about PE pipe 4, the protective joint 2 back of finishing of installation, annular protrusion 8 on PE pipe 4 inserts in annular 9 and the outer peripheral face of annular protrusion 8 supports tight rubber packing ring 10.

The front side and the rear side of the semicircular valve 6 are respectively provided with a connecting lug 11, the bolts 7 are positioned on the connecting lugs 11, the connecting lugs 11 on the front side and the rear side are respectively provided with three bolts 7, the bolts 7 penetrate through the two connecting lugs 11 on the same side and are fixed through locking nuts 12, rubber pads are arranged on the preferred connecting lugs 11, and the sealing performance of the protection joint 2 is further improved.

Still have on the inner wall of semicircle lamella 6 with seamless steel pipe 3 matched with support piece, support piece can strengthen the structural strength who connects 2 middle parts, supplementary protection when burying underground the gas pipeline connects 2 supports soil layer weight, support piece includes the semicircle annular plate 13 that contacts with seamless steel pipe 3 and sets firmly gusset 14 between semicircle annular plate 13 and semicircle lamella 6, support piece's material is PE.

The working principle of the embodiment is as follows:

during assembly, two adjacent pipeline bodies 1 are aligned, the seamless steel pipes 3 in the two adjacent pipeline bodies 1 are aligned and contacted, the two adjacent seamless steel pipes 3 are welded, then two semicircular flaps 6 of the protective joint 2 are respectively buckled on the upper side and the lower side of the joint of the two adjacent pipeline bodies 1, the annular bulge 8 is ensured to enter the annular groove 9, a bolt 7 is arranged in a penetrating manner, a locking nut 12 is screwed tightly, the periphery of the annular bulge 8 abuts against the rubber gasket 10, the support piece abuts against the seamless steel pipes 3 to complete the connection of the adjacent pipeline bodies 1, and the pipeline bodies 1 are covered with soil and buried after the connection is completed;

because pipeline body 1 includes seamless steel pipe 3 and the cladding PE pipe 4 outside seamless steel pipe 3, the seam crossing between the adjacent pipeline body 1 also has the protection of joint 2 moreover, and whole gas pipeline has had high pressure concurrently and has carried and anticorrosive function, job stabilization, long service life.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The long-life gas pipe fitting is characterized by comprising a pipeline body and a protection joint, wherein the pipeline body comprises a seamless steel pipe and a PE pipe coated on the outer side of the seamless steel pipe, two ends of the seamless steel pipe extend out of the PE pipe, and fireproof heat insulation layers in contact with the seamless steel pipe are respectively arranged on the inner walls of two sides of the PE pipe; the protection connects hoop to establish on two adjacent PE pipes, specifically, the protection connect include two with PE pipe matched with semicircle lamella links to each other through the bolt between the semicircle lamella.

2. The long-life pipe fitting for gas as claimed in claim 1, wherein the material of said fire-proof and thermal-insulation layer is aerogel felt layer.

3. The long-life gas pipe as claimed in claim 1, wherein said fire-proof and heat-insulating layer is circular and has an axial length of not less than 40 cm.

4. The long-life pipe fitting for gas as claimed in claim 1, wherein a sealing structure is further disposed between the protection joint and each PE pipe in a matching manner, the sealing structure includes an annular protrusion symmetrically disposed on the PE pipe and an annular groove opened on an inner wall of the protection joint and matched with the annular protrusion, and a rubber gasket is disposed in the annular groove in a matching manner.

5. The long life pipe for gas as claimed in claim 4, wherein said PE pipe has two annular protrusions on both sides.

6. The long life pipe fitting for gas as claimed in claim 1, wherein said semicircular valve has engaging lugs at its front and rear sides, respectively, and said bolt is located on said engaging lugs.

7. The long-life pipe fitting for gas as claimed in claim 1, wherein the inner wall of the semi-circular valve is further provided with a supporting member matched with the seamless steel pipe, and the supporting member comprises a semi-circular ring plate contacted with the seamless steel pipe and a rib plate fixedly arranged between the semi-circular ring plate and the semi-circular valve.