CN216520292U - Steel epoxy sleeve for improving axial constraint force of pipeline - Google Patents

Abstract

The utility model discloses a steel epoxy sleeve for improving the axial restraint force of a pipeline, which comprises a steel sleeve and a negative Poisson ratio material layer, wherein the negative Poisson ratio material layer is circumferentially coated at the repaired part of the pipeline, the steel sleeve is arranged on the outer peripheral side of the negative Poisson ratio material layer and comprises a first semi-arc plate and a second semi-arc plate, the first semi-arc plate and the second semi-arc plate are connected through a flange, the steel sleeve and the peripheral wall of the pipeline form an annular cavity, the negative Poisson ratio material layer is positioned in the annular cavity, a partition plate is arranged on the inner wall of the steel sleeve, and a filling hole and a glue outlet are formed in the steel sleeve. The utility model discloses a solve in the prior art epoxy steel sleeve and repaired the position and receive the problem of easy along axial extension damage behind the axial stress.

Description

A Steel Epoxy Sleeve for Improving Axial Constraint Force of Pipes

technical field

The utility model belongs to the technical field of pipeline repair, in particular to a steel epoxy sleeve for improving the axial restraint force of a pipeline.

Background technique

The steel epoxy sleeve repair technology is currently a widely used pipeline repair method. The epoxy steel sleeve is to wrap the defective part of the pipe body with two steel sleeves, seal the end of the steel sleeve with a sealant, and then Epoxy resin glue is injected into the annular cavity formed between the sleeve and the outer peripheral wall of the pipeline. This repair method can withstand high hoop stress and can be used for the repair of large-area damaged surfaces of various types of pipelines, including corrosion, Non-extensive cracking, various depressions or fractures in axial and circumferential directions, and various abnormal conditions associated with girth welds.

The pipeline repaired by the epoxy steel sleeve will still be subjected to dead loads such as the self-weight of the pipeline structure, covering soil load, fluid gravity and other dead loads, as well as traffic loads, ground stacking loads, temperature loads, pipeline internal pressure, floating loads, and earthquake loads during the continuous service process. When the live load is equal, the repaired part of the epoxy steel sleeve is easy to expand and damage in the axial direction after being subjected to axial stress.

Utility model content

The purpose of the utility model is: in order to solve the problem that the repaired part of the epoxy steel sleeve is easy to expand and damage in the axial direction after being subjected to axial stress, a steel epoxy sleeve that improves the axial restraint force of the pipeline is proposed.

In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

A steel epoxy sleeve for improving the axial restraint force of a pipeline, comprising a steel sleeve and a negative Poisson's ratio material layer, wherein the negative Poisson's ratio material layer is circumferentially wrapped around a pipeline repair part, and the steel sleeve is provided with On the outer peripheral side of the negative Poisson's ratio material layer, the steel sleeve includes a first half-arc plate and a second half-arc plate, and the first half-arc plate and the second half-arc plate are connected by flanges , the steel sleeve and the outer peripheral wall of the pipeline form an annular cavity, the negative Poisson's ratio material layer is located in the annular cavity, the inner wall of the steel sleeve is provided with a partition plate, and the steel sleeve is It is equipped with a perfusion hole and a glue outlet.

As a further description of the above technical solution:

The perfusion hole and the glue outlet hole are arranged on the first half-arc plate.

As a further description of the above technical solution:

The partition plate is arranged on the inner wall of the first half-arc plate, and the partition plate is also arranged on the inner wall of the second half-arc plate. The partition plate on the second half-arc plate forms a continuous spiral sheet shape, the partition plate divides the annular cavity into a continuous spiral cavity, and the perfusion hole and the glue outlet hole are provided At both ends of the continuous spiral cavity, the negative Poisson's ratio material layer is filled in the continuous spiral cavity, and the negative Poisson's ratio material layer is in the shape of a continuous spring as a whole.

As a further description of the above technical solutions:

Several baffles are arranged at the splicing seam of the first half-arc plate and the second half-arc plate, and the baffles are arranged on the inner wall of the first half-arc plate.

As a further description of the above technical solution:

It also includes a sealing assembly, the sealing assembly is arranged on the axial end faces of the steel sleeve, the sealing assembly includes a sealing rubber strip and a locking ring, the sealing rubber strip is arranged on the end surface of the steel sleeve, and the locking Rings fasten the sealing strip to both ends of the steel sleeve by means of bolts.

To sum up, due to the adoption of the above-mentioned technical solutions, the beneficial effects of the present utility model are:

(1) The negative Poisson's ratio material layer spirally arranged in the annular cavity is bonded with the outer peripheral wall of the pipeline and the steel sleeve under the bonding of epoxy resin glue, which can produce axial constraints on the pipeline as a whole, adding a negative Poisson's ratio. The steel epoxy sleeve of the material layer can effectively share the axial load borne by the pipe girth weld, and restrain the girth weld defect from expanding in the axial direction.

(2) The spiral sheet-shaped partition plate divides the annular cavity into spiral cavities. When epoxy resin glue is injected into the spiral cavity through the perfusion hole, the epoxy resin glue fills the gap along the spiral cavity spirally, and the epoxy resin The resin glue can bond the outer peripheral wall of the pipe, the negative Poisson's ratio material layer and the steel sleeve together.

(3) The baffle and the sealing strip can seal the gap between the steel sleeve and the pipe to avoid overflow when epoxy resin is injected.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present utility model;

Fig. 2 is the exploded view of the utility model;

3 is a cross-sectional view of the sealing assembly of the present invention.

Legend description: 1. Steel sleeve; 2. Negative Poisson's ratio material layer; 31. The first half-arc plate; 32. The second half-arc plate; 4. The perfusion hole; ; 8, baffle; 9, sealing strip; 10, locking ring.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to Figures 1-3, the utility model provides a technical solution:

A steel epoxy sleeve for improving the axial restraint force of a pipeline, comprising a steel sleeve 1, a negative Poisson's ratio material layer 2, and the negative Poisson's ratio material layer 2 is glued on the outer periphery of the pipeline to be repaired by epoxy resin Wall, the steel sleeve 1 includes a first half arc plate 31 and a second half arc plate 32, the first half arc plate 31 and the second half arc plate 32 are fixed at the repaired part of the pipeline by flanges, and the first half arc plate 31 After being installed with the second half arc plate, an annular cavity is formed with the outer peripheral wall of the pipeline. The inner peripheral wall of the first half arc plate 31 is welded and fixed with the partition plate 7, and the inner peripheral wall of the second half arc plate 32 is also welded and fixed with a partition plate 7. The plate 7, the partition plate 7 of the first half arc plate 31 and the partition plate 7 on the second half arc plate 32 form a continuous spiral sheet shape, thus dividing the annular cavity into a continuous spiral cavity, negative Poisson The ratio material layer 2 is located in the spiral cavity, and the negative Poisson's ratio material layer 2 is formed into a continuous spring shape as a whole. The plate 8 is arranged on the inner wall of the first half arc plate 31, and the baffle plate 8 is welded and fixed on the inner wall of the first half arc plate 31. When the first half arc plate 31 and the second half arc plate 32 are spliced together, the back plate 8 blocks The steel sleeve 1 is also provided with a perfusion hole 4 and a glue outlet hole 5, the perfusion hole 4 and the glue outlet hole 5 are both arranged on the first half arc plate 31, and the perfusion hole 4 and the glue outlet hole 5 are arranged on the first half arc plate 31. At both ends of the continuous spiral cavity, epoxy resin glue is injected from the pouring hole 4, and the epoxy resin glue further fills the gap between the negative Poisson's ratio material layer 2 and the steel sleeve 1, and the epoxy resin follows the continuous spiral. The cavity is injected and finally overflows from the glue outlet.

It also includes a sealing component. The sealing component includes a sealing rubber strip 9 and a locking ring 10. The cross-section of the sealing rubber strip 9 is L-shaped. The end face of the pipe, the locking ring 10 is a stainless steel ring, the cross-section of the locking ring 10 is L-shaped, the locking ring 10 is adapted to the sealing rubber strip 9, when the steel sleeve 1 is installed on the pipeline, use the sealing rubber strip 9 along the edge The pipe is wound around the two ends of the steel sleeve 1 for a circle, and then the sealing rubber strip 9 is fixed and locked by the locking ring 10, and the locking ring 10 is fixed by bolts.

Working principle: first determine the position where the pipe needs to strengthen the axial restraint force, then apply a layer of epoxy resin glue to the position, then stick the negative Poisson's ratio material layer 2 to the peripheral wall of the pipe, and then install the steel sleeve 1 on the pipe. On the pipeline, the negative Poisson's ratio material layer 2 is adapted to the spiral cavity of the steel sleeve 1. After the steel sleeve 1 is installed, the two ends of the steel sleeve 1 are sealed with the sealing strip 9 and the locking ring 10. The glue outlet vacuumizes the annular cavity, and then pours epoxy resin glue into the annular cavity from the filling hole 4, and injects glue while vacuuming. When the glue flow is the same, stop injecting epoxy resin glue. The epoxy resin glue is used to fill the gap between the negative Poisson's ratio material layer 2 and the steel sleeve 1, and the installation is completed after a certain period of curing. The negative Poisson's ratio material layer 2 is bonded together with the outer peripheral wall of the pipe and the inner side wall of the steel sleeve 1 by epoxy resin glue. When the pipe is subjected to axial tension, the negative Poisson's ratio material layer 2 shrinks in the axial direction. In order to increase the axial binding force of the pipeline, a larger binding force can prevent the expansion and damage of the repaired part of the pipeline.

The layer structure of the negative Poisson's ratio material and the negative Poisson's ratio material are all in the prior art, and details are not described herein again.

The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Equivalent replacement or modification of the new technical solution and its utility model concept shall be included within the protection scope of the present utility model.

Claims (5)

1. The utility model provides an improve steel epoxy sleeve of pipeline axial confining force, its characterized in that includes steel sleeve (1), negative poisson ratio material layer (2) circumference cladding is at the pipeline repair position, steel sleeve (1) sets up the periphery side of negative poisson ratio material layer (2), steel sleeve (1) includes first half arc board (31) and second half arc board (32), first half arc board (31) with second half arc board (32) pass through flange joint, steel sleeve (1) and pipeline periphery wall form toroidal cavity, negative poisson ratio material layer (2) are located the toroidal cavity, the inner wall of steel sleeve (1) is provided with division board (7), be equipped with on steel sleeve (1) and pour into hole (4) and go out jiao kou (5).

2. The steel epoxy sleeve for increasing axial restraint of a pipe of claim 1, wherein: the pouring hole (4) and the glue outlet hole (5) are formed in the first semi-arc plate (31).

3. The steel epoxy sleeve for increasing axial restraint of a pipe of claim 2, wherein: the inner wall of first half arc board (31) is provided with division board (7), the inner wall of second half arc board (32) also is provided with division board (7), first half arc board (31) division board (7) with on second half arc board (32) division board (7) form continuous spiral slice, division board (7) will annular cavity separates into continuous spiral cavity, fill hole (4) with it sets up to go out jiao kou (5) continuous spiral cavity's both ends, negative poisson ratio material layer (2) are filled in the continuous spiral cavity, negative poisson ratio material layer (2) wholly is continuous spring form.

4. The steel epoxy sleeve for increasing axial restraint of a pipe of claim 3, wherein: the splicing seam of the first half-arc plate (31) and the second half-arc plate (32) is provided with a plurality of baffles (8), and the baffles (8) are arranged on the inner wall of the first half-arc plate (31).

5. The steel epoxy sleeve for increasing axial restraint of a pipe of claim 1, wherein: the sealing device is characterized by further comprising a sealing assembly, wherein the sealing assembly is arranged on two axial end faces of the steel sleeve (1), the sealing assembly comprises a sealing rubber strip (9) and a locking ring (10), the sealing rubber strip (9) is arranged on the end face of the steel sleeve (1), and the locking ring (10) fixes the sealing rubber strip (9) at two ends of the steel sleeve (1) through bolts.

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