CN215445557U - PE pipeline postweld strength retaining device - Google Patents

Abstract

The utility model discloses a PE pipeline post-welding strength maintaining device which comprises a gas pipeline and a plugging tee structure, wherein the plugging tee structure is arranged on the outer wall of the gas pipeline and comprises an upper clamp and a lower clamp, the lower clamp comprises a lower semicircle, lower mounting plates are arranged on two sides of the lower semicircle, lower through holes are arrayed on the lower mounting plates, the upper clamp is provided with an upper semicircle, upper mounting plates matched with the lower mounting plates are arranged on two sides of the upper semicircle, upper through holes corresponding to the lower through holes are arranged on the upper mounting plates, and the upper through holes and the lower through holes are connected through bolts. Go up the mounting panel and be equipped with the clearance down between the mounting panel, can reduce the installation accuracy, even also can be suitable for on the gas pipeline of different diameter specifications, can guarantee installation intensity with the inseparable outer wall of installing at gas pipeline of last clip and lower clip through the bolt. In addition, a plurality of slotted holes are formed, so that the material cost is effectively reduced on the basis of ensuring the installation stability.

Description

PE pipeline postweld strength retaining device

Technical Field

The utility model relates to the technical field of fuel gas conveying, in particular to a device for maintaining the strength of a PE pipeline after welding.

Background

During the gas pipeline rerouting construction, before the old pipe is broken, the by-pass pipes are connected to the two ends of the construction area to ensure the normal operation of the gas pipe network, and then the shutoff of the blocker at the two ends of the construction area, the pipe breaking and other constructions are performed to realize the non-stop rerouting construction of the gas pipeline.

The principle of the construction technology that pipelines in various forms do not stop conveying is the same, the operation of gas in the pipelines in a construction area is blocked by the blocker in various forms, and the normal conveying of the gas in the pipelines is realized by the bypass pipe, and the different points are that the blocker and equipment are different in form.

Current shutoff tee bend structure generally sets up the melting piece through intrados and the PE gas pipeline surface at tee bend structure, the mode that adopts the high frequency coil heating in tee bend structure's the outside adds the heat welding with the extrados melting of tee bend structure intrados and gas pipeline, however its welded reliability can not guarantee, receive external environment's temperature easily and influence its welding effect, and do not have relevant detection and ensure the inside welded fastness of its cambered surface, and PE gas pipeline's life will guarantee 50 years at least, it is very high to the reliability requirement. Such an intensity that cannot be detected cannot be satisfied for practical use. In addition, the plugging tee joint structure can be kept on the pipeline after maintenance, any reinforcing and maintaining tool is not provided, and the plugging tee joint structure becomes an uncontrollable potential safety hazard in the gas pipeline.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model provides a PE pipeline post-welding strength maintaining device which is convenient to install, wide in application range and low in cost.

The technical scheme of the utility model is realized as follows:

the utility model provides a PE pipeline postweld intensity retention device, its includes gas pipeline and shutoff tee bend structure, shutoff tee bend structrual installation is in gas pipeline's outer wall, a serial communication port, shutoff tee bend structure includes clip and lower clip, lower clip includes semicircle down, semicircular both sides are equipped with down the mounting panel down, the array has down the through-hole down on the mounting panel down, it is equipped with the semicircle to go up the clip, the both sides of last semicircle be equipped with the last mounting panel that the mounting panel matches down, go up be equipped with on the mounting panel with the last through-hole that the through-hole corresponds down, go up through-hole and pass through bolted connection down between the through-hole.

In the post-welding strength maintaining device for the PE pipeline, the arc length of the upper semicircle and the arc length of the lower semicircle are smaller than the diameter arc length of the gas pipeline.

In the post-welding strength maintaining device for the PE pipeline, a plurality of slotted holes are arrayed on the lower semicircle.

In the device for maintaining the strength of the PE pipeline after welding, the upper clamp comprises an upper channel, the upper channel is provided with a sealing device, the sealing device comprises a trapezoidal boss, a cylindrical sealing element, an annular sealing ring and an end cover, the trapezoidal boss is arranged on the inner wall of the upper channel, the inner wall of the upper channel is also provided with a semicircular groove, the annular sealing ring is arranged in the semicircular groove, one end face of the cylindrical sealing element abuts against the trapezoidal boss, the other end face of the cylindrical sealing element extends out of the top surface of the upper channel, and the end cover is connected with the upper channel through threads.

In the post-weld strength maintaining device for the PE pipe, the height of the cylindrical sealing element is larger than the distance from the trapezoid boss to the upper end face of the upper channel.

In the special three-way plugging structure for the PE gas pipeline, the inner wall of the upper channel is also provided with a semicircular groove, and the semicircular groove is matched with the annular sealing ring.

The device for maintaining the strength of the PE pipeline after welding has the following beneficial effects: go up the mounting panel and be equipped with the clearance down between the mounting panel, can reduce the installation accuracy, even also can be suitable for on the gas pipeline of different diameter specifications, can guarantee installation intensity with the inseparable outer wall of installing at gas pipeline of last clip and lower clip through the bolt. In addition, a plurality of slotted holes are formed, so that the material cost is effectively reduced on the basis of ensuring the installation stability.

Drawings

FIG. 1 is a schematic structural diagram of a post-weld strength maintaining device for PE pipes according to the present invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a bottom view of FIG. 1;

FIG. 5 is a perspective view of FIG. 1;

FIG. 6 is a sectional view taken along line B-B of FIG. 4;

FIG. 7 is a sectional view taken along line A-A of FIG. 2;

FIG. 8 is an exploded view of FIG. 7;

fig. 9 is an enlarged view of the portion C in fig. 7.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The device for maintaining the strength of the PE pipeline after welding, as shown in fig. 1 to 9, comprises a gas pipeline 10 and two blocking tee structures 20, wherein the blocking tee structures 20 are installed on the outer wall of the gas pipeline 10, preferably, two blocking tee structures 20 are installed on two sides of a maintenance section 11 of the gas pipeline 10, respectively, and after maintenance is completed, the blocking tee structures 20 need to be continuously maintained on the gas pipeline 10 to ensure the sealing performance of an open hole section 12. The metal strips 13 are uniformly arrayed on one surface, close to the gas pipeline 10, inside the upper clamp, the upper clamp 21 and the PE gas pipeline 10 are fused in a mode of heating the metal strips 13 through coils, and the upper clamp and the PE gas pipeline are welded and fixed after being cooled.

The three-way plugging structure 20 comprises a lower clamp 25, the lower clamp 25 comprises a lower semicircle 251, lower mounting plates 252 are arranged on two sides of the lower semicircle 251, lower through holes are arrayed on the lower mounting plates 252, upper mounting plates 221 matched with the lower mounting plates 252 are arranged on two sides of the upper semicircle 22, upper through holes corresponding to the lower through holes are arranged on the upper mounting plates 221, and the upper through holes are connected with the lower through holes through bolts 26.

The arc length of the upper semicircle 22 and the lower semicircle 251 is smaller than the diameter arc length of the gas pipe 10. That is, a certain gap is provided between the upper clip 21 and the lower clip 25, so that the mounting accuracy can be reduced, the gas pipe 10 can be applied to gas pipes 10 having different diameters, the upper clip 21 and the lower clip 25 can be tightly mounted on the outer wall of the gas pipe by the bolts 26, and the mounting strength can be improved.

The lower half circle 251 has a plurality of slots 253 arranged therein. Lower clip 25 mainly plays the reinforcement and the maintenance effect to last clip 22, guarantees to go up clip 22 and firmly installs on gas pipeline 10, sets up a plurality of slotted holes 253, on the basis of guaranteeing the installation steadiness, effectively reduces material cost.

Shutoff three way construction 20 includes clip 21, it includes semicircle 22 and last passageway 23 to go up clip 21, it is equipped with sealing device to go up the passageway, sealing device includes trapezoidal boss 241, cylinder sealing member 242, ring type sealing washer 243 and end cover 244, trapezoidal boss 241 sets up the inner wall at last passageway 23, the inner wall of going up passageway 23 still is equipped with half slot 231, ring type sealing washer 243 is installed in half slot 231, a terminal surface of cylinder sealing member 242 supports on trapezoidal boss 241, the top surface of passageway 23 is stretched out to another terminal surface, pass through threaded connection between end cover 244 and the last passageway 23, high durability and convenient installation.

The height of the cylindrical seal 242 is greater than the distance from the trapezoidal boss 241 to the upper end surface of the upper channel 23. When screwing end cover 244, cylindrical seal 242 receives the extrusion, be interference fit between cylindrical seal 242 and end cover 244 and trapezoidal boss 241, cylindrical seal 242 receives many-sided extrusion, forms inseparable laminating with last passageway 23, and is sealed effectual, especially terminal surface and the inclined plane contact of trapezoidal boss 241 under cylindrical seal 242, the terminal surface becomes to form the inclined plane under the cylindrical seal 242 after receiving the extrusion, can obviously improve sealed effect, avoids rubber seal to age the phenomenon that the shrink in appearance for a long time simultaneously.

Preferably, semi-circular groove 231 mates with annular sealing ring 243. The fixing function is realized during the installation, so that the sealing ring is firmly locked between the cylindrical sealing element 242 and the upper channel 23, and the sealing effect is further ensured.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (3)

1. The utility model provides a PE pipeline postweld intensity retention device, its includes gas pipeline and shutoff tee bend structure, shutoff tee bend structrual installation is in gas pipeline's outer wall, a serial communication port, shutoff tee bend structure includes clip and lower clip, lower clip includes semicircle down, semicircular both sides are equipped with down the mounting panel down, the array has down the through-hole down on the mounting panel down, it is equipped with the semicircle to go up the clip, the both sides of last semicircle be equipped with the last mounting panel that the mounting panel matches down, go up be equipped with on the mounting panel with the last through-hole that the through-hole corresponds down, go up through-hole and pass through bolted connection down between the through-hole.

2. The PE pipe post weld strength retention device of claim 1, wherein the arc length of the upper and lower semi-circles is less than the diameter arc length of the gas pipe.

3. The PE pipe post-weld strength maintaining device according to claim 1, wherein the lower semicircle has a plurality of slots arrayed thereon.

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