CN221222411U - In-service natural gas pipeline tiny leakage drainage and monitoring temporary disposal device - Google Patents

Abstract

The utility model discloses an in-service natural gas pipeline tiny leakage drainage and monitoring temporary treatment device which comprises a drainage shell and a drainage pipeline, wherein an adhesive structure is arranged on the lower side of the periphery of the drainage shell, a sealed drainage cavity is formed between the middle part of the drainage shell and a pipeline to be tested, one end of the drainage pipeline is communicated with the drainage cavity, and a flow monitoring structure is arranged on the other end of the drainage pipeline. The novel device has the characteristics of quick and safe disposal and simple installation, avoids disturbance caused by pipeline bodies and defect welding seams, also effectively prevents the accumulation of explosive gas in a limited space, and is an effective early-stage disposal measure for tiny leakage of a natural gas pipeline.

Description

In-service natural gas pipeline tiny leakage drainage and monitoring temporary disposal device

Technical Field

The utility model relates to the technical field of leakage monitoring of gas pipelines, in particular to a temporary disposal device for micro leakage drainage and monitoring of an in-service natural gas pipeline.

Background

During the operation of natural gas pipelines, welds are prone to failure and leakage events, particularly pipeline girth welds, due to the superposition of various factors. According to the technical specification of the failure emergency repair of the steel oil and gas pipeline-SY/T7033-2016 and the technical specification of the repair of the pipe body defect of the oil and gas pipeline-SY/T6499-2018, the common repair modes of the failure of the oil and gas pipeline are repair of a patch, repair of a sleeve (comprising A type, B type, epoxy sleeve and drainage sleeve), repair of a mechanical clamp, repair of a flexible plugging clamp, repair of a pipe replacement and the like. However, when the pipeline leaks due to crack defects of the girth weld, the above treatment measures have a number of disadvantages. If the flexible plugging fixture is generally suitable for the leakage treatment of point defects, the leakage effect caused by cracks is limited, and particularly when the weld seam surplus height exists or the surface of a pipeline is uneven and difficult to polish; the mechanical clamp is generally applicable to temporary treatment of pipeline leakage, is a shaped product, cannot cover all types of pipelines, has a longer manufacturing period if customized, and cannot meet the requirement of early treatment; and the repair of the patch and the repair of the sleeve are carried out under pressure, the stress state of the welding line is changed, and the welding environment has hidden danger of explosion and high risk coefficient.

Because of the pipeline leakage caused by the weld cracks, the existing pipeline leakage treatment mode cannot be used for effectively and temporarily treating the pipeline leakage, the subsequent permanent treatment cannot be carried out for a long time, and the risk cannot be controlled.

In summary, the non-welded drainage and periodic monitoring mode of the scheme is adopted as temporary treatment measures for leakage caused by weld crack defects.

Disclosure of utility model

The utility model aims to solve the technical problem of providing the temporary disposal device for the tiny leakage drainage and monitoring of the in-service natural gas pipeline, which has the characteristics of quick and safe disposal and simple installation, avoids disturbance caused by pipeline bodies and defective welding seams, effectively prevents the accumulation of explosive gas in a limited space, and is an effective early disposal measure for the tiny leakage of the natural gas pipeline.

The technical scheme for solving the technical problems is as follows: including drainage casing and drainage pipeline, drainage casing four sides downside is provided with bonding structure, the middle part of drainage casing forms inclosed drainage chamber with the pipeline that awaits measuring, drainage pipeline's one end with the drainage chamber intercommunication, install flow monitoring structure on its other end.

The beneficial effects of adopting above-mentioned technical scheme are:

The method has the characteristics of quick and safe disposal and simple installation, avoids disturbance caused by pipeline bodies and defective welding seams, effectively prevents explosive gas from gathering in a limited space, and is an effective early-stage disposal measure for tiny leakage of the natural gas pipeline.

On the basis of the technical scheme, the utility model can be improved as follows.

Further, the bonding structure is a viscoelastic body anti-corrosion tape.

The adoption of the further scheme has the beneficial effects of simple and convenient construction, good sealing effect, long corrosion resistance life and environmental protection.

Further, reinforcing structures used for being intertwined with the pipeline to be tested are arranged on the upper sides of the periphery of the drainage shell.

The beneficial effect of adopting above-mentioned further scheme is that can further strengthen drainage casing and the steadiness of being connected of pipeline that awaits measuring, reinforcing sealed effect.

Further, the reinforcing structure is a viscoelastic body anti-corrosion belt.

The beneficial effect of adopting above-mentioned further scheme is that the winding of viscoelastic body corrosion protection area is at drainage casing and pipeline that awaits measuring, and fixed effect is good.

Further, the drainage pipeline is made of flexible materials.

The further scheme has the beneficial effects of light weight and convenience for operators to work.

Further, the drainage device further comprises a conversion nipple, a threaded connector communicated with the drainage cavity is embedded in the middle of the drainage shell, and two ends of the conversion nipple are connected with one end of the drainage pipeline through threads.

The technical scheme has the beneficial effects that the drainage shell and the drainage pipeline are convenient to connect quickly, the working efficiency is improved, and the tightness of the threaded connection mode is good.

Further, the flow monitoring structure is a flow meter.

The further scheme has the beneficial effects that the gas quantity leaked by the pipeline can be accurately detected, and the operation personnel can observe the gas quantity and then carry out the next operation conveniently.

Further, the liquid inlet of the flowmeter is detachably connected with the other end of the drainage pipeline through the mounting head.

The beneficial effect of adopting above-mentioned further scheme is the connection of the part of being convenient for, and the practicality is strong.

Further, the liquid outlet of the flowmeter is also communicated with an extension pipeline.

The beneficial effect of adopting above-mentioned further scheme is through the setting of extension pipeline, can discharge the gas in the safety zone, improves the security.

Further, the drainage shell is made of nitrile rubber.

The further scheme has the advantages of low cost, durability and light weight.

Drawings

FIG. 1 is a schematic view of the structure of the present invention;

FIG. 2 is a schematic illustration of the connection of the drainage housing to the drainage tube;

fig. 3 is a schematic diagram of the overlap of the bonding structure and the reinforcing structure.

In the drawings, the list of components represented by the various numbers is as follows:

1. A drainage shell; 2. a drainage tube; 3. an adhesive structure; 4. a threaded connector; 5. a flow meter; 6. extending the pipeline; 7. a conversion nipple; 8. a mounting head; 9. and (5) reinforcing the structure.

Detailed Description

The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.

Example 1:

As shown in fig. 1-3, in this embodiment, an in-service natural gas pipeline tiny leakage drainage and monitoring temporary treatment device comprises a drainage shell 1 and a drainage pipeline 2, wherein an adhesive structure 3 is arranged on the lower side of the periphery of the drainage shell 1, a sealed drainage cavity is formed between the middle part of the drainage shell 1 and a pipeline to be tested, a leakage port of the pipeline to be tested is positioned in the drainage cavity, one end of the drainage pipeline 2 is communicated with the drainage cavity, and a flow monitoring structure is arranged on the other end of the drainage pipeline 2.

The beneficial effects of this embodiment are: the drainage cavity of the drainage shell 1 is used for collecting leakage gas, the drainage pipeline 2 is used for gas drainage to a safety area, and the device discharges leakage media of the natural gas pipeline to the safety area in a non-welding drainage mode, so that tiny leakage of the natural gas pipeline can be effectively treated.

On the basis of the above embodiment, as shown in fig. 1, the main body of the drainage casing 1 is cylindrical, and extension mounting plates extend out from two sides of the drainage casing 1, and the extension mounting plates are used for being connected with a pipeline to be tested through an adhesive structure 3.

Further, the thickness of the extension mounting plate is sequentially reduced from the direction close to the center line of the drainage shell 1 to the direction far away from the center line of the drainage shell 1, so that the subsequent stable adhesion of the adhesion structure 3 is facilitated.

Example 2

Preferably, on the basis of embodiment 1, the adhesive structure 3 is a viscoelastic body anti-corrosion tape, and mainly forms a sealed space with the drainage cavity.

The beneficial effects of this embodiment are: the construction is simple and convenient, the sealing effect is good, the corrosion-resistant service life is long, and the environment is protected.

It should be noted that the viscoelastic body anti-corrosion tape is a new anti-corrosion product specially designed for buried pipelines and other different equipment needing anti-corrosion, such as flanges, valves, pumps and the like, and mainly comprises materials such as rubber, elastomer, high molecular polymer, additives and the like.

Example 3

Preferably, on the basis of the embodiment 1-2, a reinforcing structure 9 for intertwining with the pipeline to be tested is arranged on the upper side of the periphery of the drainage shell 1.

The beneficial effects of this embodiment are: the stability of the connection between the drainage shell 1 and the pipeline to be tested can be further enhanced, and the sealing effect is enhanced.

Example 4

Preferably, on the basis of embodiment 3, the reinforcing structure 9 is a viscoelastic anti-corrosive tape.

The beneficial effects of this embodiment are: the viscoelastic body anti-corrosion belt is wound on the drainage shell 1 and the pipeline to be tested, and the fixing effect is good.

Example 5

Preferably, in the embodiment 1-4, the material of the drainage tube 2 is a flexible material.

The beneficial effects of this embodiment are: the weight is light, and the work of operators is convenient.

Further, the drainage pipe 2 is made of flexible rubber material or a metal hose.

Example 6

Preferably, on the basis of embodiments 1-5, the drainage device further comprises a conversion nipple 7, wherein the middle part of the drainage shell 1 is embedded with a threaded connector 4 communicated with the drainage cavity, and two ends of the conversion nipple 7 are connected with the threaded connector 4 and one end of the drainage pipeline 2 through threads.

The beneficial effects of this embodiment are: the drainage shell 1 and the drainage pipeline 2 are convenient to connect quickly, the working efficiency is improved, and the tightness of the threaded connection mode is good.

Further, the bottom and the drainage casing 1 upper end integrated into one piece of threaded connection head 4 are equipped with first internal thread in the threaded connection head 4 top, and the one end of conversion nipple joint 7 is equipped with the first external screw thread with first internal screw thread complex, and the other end of conversion nipple joint 7 is equipped with the second external screw thread, is equipped with on the drainage pipeline 2 with second external screw thread complex second internal screw thread.

Further, in order to further enhance the sealing effect, a sealing ring may be provided at the threaded connection.

The scheme of alternative above-mentioned embodiment is, the both ends of conversion nipple joint 7 with threaded connection head 4 with the one end of drainage pipeline 2 is all through the buckle connection, and the installation of being convenient for saves time.

Example 7

Preferably, on the basis of examples 1-6, the flow monitoring structure is a flow meter 5.

The beneficial effects of this embodiment are: the gas quantity leaked by the pipeline can be accurately detected, so that the operator can observe the gas quantity and then operate the gas in the next step.

Based on the above embodiment, the flow monitoring structure may be a similar optical fiber hydrogen sensor in the leakage monitoring device of the hydrogen-doped natural gas pipeline in the prior patent CN202121271138.7, the optical signal of the reaction hydrogen concentration detected by the optical fiber hydrogen sensor is converted into an electrical signal, the electrical signal is converted into a digital signal on the singlechip, and the data is wirelessly transmitted to the upper computer, and when the hydrogen concentration reaches a preset alarm value, the audible and visual alarm device is automatically started.

Example 8

Preferably, on the basis of embodiment 7, the liquid inlet of the flowmeter 5 is detachably connected to the other end of the drainage pipe 2 through a mounting head 8.

The beneficial effects of this embodiment are: the connection of the parts is convenient, and the practicability is strong.

Further, the liquid inlet of the flowmeter 5 is in threaded connection with the other end of the drainage pipeline 2 through the mounting head 8.

Example 9

Preferably, on the basis of embodiment 8, the liquid outlet of the flowmeter 5 is further communicated with an extension pipe 6.

The beneficial effects of this embodiment are: the arrangement of the extension pipeline 6 can discharge gas in a safety area, so that the safety is improved.

Preferably, the extension pipe 6 is L-shaped, further improving safety.

Example 10

Preferably, on the basis of embodiments 1 to 9, the drainage casing 1 is made of nitrile rubber.

The beneficial effects of this embodiment are: low cost, durability and light weight.

The following are in-situ test experiments

In the routine investigation process of the outbound insulating joint, a certain natural gas receiving station maintainer finds that leakage occurs from the 3 point to the 5 point of the circumferential weld of the insulating joint body, visually detects that the 9 leakage points are positioned at weld toes of the welding bead, and forms discontinuous lines along the length direction of the welding bead, and the total length is about 65mm.

The pipeline where the leakage insulation joint is located formally enters into the production operation stage in 2017 and 4 months. The pipeline material X70, the pipe diameter and the wall thickness phi 813mm, the wall thickness 17.5mm, the design pressure 10MPa and the operating pressure 6.19MPa.

In view of the fact that the leakage point is located at the weld toe of the girth weld bead, the device is applied to treatment, and the specific implementation mode is as follows:

① Before the drainage shell 1 is installed, coating and dirt at the positions about 100mm away from the two sides of the defective weld joint are cleaned, and the defective area of the girth weld joint is marked;

② Winding the viscoelastic body anti-corrosion tape according to a specified winding and lapping mode;

③ And exposing the defective weld joint, and installing other parts such as the drainage shell 1, the drainage pipeline 2 and the like.

The working principle of the utility model is as follows:

The drainage cavity of the drainage shell 1 forms a sealing space with the pipeline to be measured through the viscoelastic body anti-corrosion belt, and is drained to the open place through drainage of the drainage pipeline 2, and meanwhile, the flow monitoring structure is used for monitoring the leakage quantity of gas.

The application scene of the utility model is as follows:

The device is mainly applied to the early treatment of the tiny leakage of the natural gas pipeline, in particular to the treatment of the leakage caused by the crack defect of the girth weld. Through the monitoring of the leakage quantity of the medium, the drainage of the leakage medium and the periodical detection of the defect welding line, the risk is ensured to be in a controllable state until the pipeline defect is permanently repaired.

The utility model has the beneficial effects that:

The utility model adopts a temporary disposal mode aiming at tiny leakage caused by the crack defect of the girth weld of the natural gas pipeline, and leads explosive gas to be discharged to the open place by adopting non-welding drainage, thereby avoiding the aggregation of explosive gas, especially in relatively closed spaces such as factory buildings, operation pits and the like, and simultaneously the device can also monitor the gas leakage quantity in real time and make a basis for the next disposal; in addition, the non-welding mode is adopted, so that nondestructive detection can be carried out on the defective welding line regularly, the running pressure of the pipeline can be regulated timely, and the malignant development of the defective welding line can be controlled as much as possible.

In the description of the present utility model, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the system or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims (10)

1. An in-service natural gas pipeline tiny leakage drainage and monitoring temporary disposal device which is characterized in that: including drainage casing (1) and drainage pipeline (2), drainage casing (1) downside all around is provided with bonding structure (3), the middle part of drainage casing (1) forms inclosed drainage chamber with the pipeline that awaits measuring, the one end of drainage pipeline (2) with drainage chamber intercommunication is installed flow monitoring structure on its other end.

2. The in-service natural gas pipeline tiny leakage drainage and monitoring temporary disposal device according to claim 1, wherein: the bonding structure (3) is a viscoelastic body anti-corrosion belt.

3. The in-service natural gas pipeline tiny leakage drainage and monitoring temporary disposal device according to claim 1, wherein: the upper side around drainage casing (1) is equipped with and is used for with the pipeline intertwine's that awaits measuring reinforced structure (9).

4. The in-service natural gas pipeline tiny leakage drainage and monitoring temporary disposal device according to claim 3, wherein: the reinforcing structure (9) is a viscoelastic body anti-corrosion belt.

5. The in-service natural gas pipeline tiny leakage drainage and monitoring temporary disposal device according to claim 1, wherein: the drainage pipeline (2) is made of flexible materials.

6. The in-service natural gas pipeline tiny leakage drainage and monitoring temporary disposal device according to claim 1, wherein: still including converting nipple joint (7), inlay on the middle part of drainage casing (1) with screwed joint (4) of drainage chamber intercommunication, the both ends of converting nipple joint (7) with screwed joint (4) with the one end of drainage pipeline (2) is all through threaded connection.

7. The in-service natural gas pipeline tiny leakage drainage and monitoring temporary disposal device according to claim 1, wherein: the flow monitoring structure is a flowmeter (5).

8. The in-service natural gas pipeline micro-leakage drainage and monitoring temporary disposal device according to claim 7, wherein: the liquid inlet of the flowmeter (5) is detachably connected with the other end of the drainage pipeline (2) through the mounting head (8).

9. The in-service natural gas pipeline micro-leakage drainage and monitoring temporary disposal device according to claim 8, wherein: the liquid outlet of the flowmeter (5) is also communicated with an extension pipeline (6).

10. An in-service natural gas pipeline micro-leakage drainage and monitoring temporary disposal device according to any one of claims 1-9, wherein: the drainage shell (1) is made of nitrile rubber.