CN214663764U

CN214663764U - Back-attached buried fluid leak detection pipeline

Info

Publication number: CN214663764U
Application number: CN202120459950.6U
Authority: CN
Inventors: 赵辉才
Original assignee: Chongqing Yuhai Property Management Co ltd
Current assignee: Chongqing Yuhai Property Management Co ltd
Priority date: 2021-03-03
Filing date: 2021-03-03
Publication date: 2021-11-09
Anticipated expiration: 2031-03-03
Also published as: CN214663764U8

Abstract

The utility model discloses a back-attached buried fluid leakage detecting pipeline, which comprises a main fluid pipeline, wherein the outer wall of the main fluid pipeline is provided with a leakage detecting pipe in a back-attached mode along the main fluid pipeline in the same direction, the leakage detecting pipe is provided with a leakage detecting opening, and the leakage detecting opening is provided with an end cap; the leakage detecting pipe is positioned below the side wall of the main fluid pipeline, and the angle alpha formed by the connecting line of the center of the leakage detecting pipe and the center of the main fluid pipeline and the horizontal line is 30-45 degrees; the utility model discloses it is high to detect the leak source accuracy, and the interference factor that detects and receive is little, does not have the detection limitation.

Description

Back-attached buried fluid leak detection pipeline

Technical Field

The utility model relates to a buried pipeline leak hunting field especially relates to a bury fluid leak hunting pipeline with attaching formula on back.

Background

The underground pressure fluid pipeline is mainly used for conveying liquid or gas, and the underground pressure fluid pipeline is used for a long time after being embedded and installed. With the loss of the underground pressure fluid pipeline after long-term use, the change of the underground geological structure around the underground pressure fluid pipeline, and the like, the situation of penetrating or joint cracking can occur to cause the leakage of liquid or gas. On one hand, the leaked liquid generally permeates downwards due to the earth attraction, and a small amount of liquid is absorbed by the peripheral backfill medium and diffuses towards the periphery; on the other hand, the buried pressure fluid pipeline is buried deeply, so that liquid is difficult to permeate to the ground surface; according to statistics, the probability of finding on the earth surface is only 3% after liquid leakage occurs in the underground pressure fluid pipeline; other leakage conditions need professional detection to find leakage points.

For searching for leakage points in the underground pressure fluid pipeline, the current searching method comprises two methods.

The first method is that the approximate position of the leakage point of the pipeline is determined in sections, then the rough analysis is carried out by constructors through combining experience, then the excavation is carried out in a groping type according to the analysis result, the probability of finding the leakage point is extremely low, the labor and the time are consumed, and the leakage point cannot be found in most of the time;

the second is to detect the leak source by other detection devices, such as ground audio detection device and thermal imaging device commonly used in the market at present, but adopt this kind of detection device to detect, detect with high costs, and detect the limitation big. For example: a thermal imaging device is selected for leak point detection, and due to the limitation of a thermal imaging principle, the detection device can only detect the depth of 10cm to 20cm below the ground surface, has the liquid flowing or leaking condition of more than 30 ℃, and has narrow application range and no universality. The ground audio detection device is also influenced by the depth of the buried pipe and the surrounding medium, the detection principle is sound detection, so that the propagation of the jet sound of the liquid at the leakage point of the pipeline to the ground is necessarily influenced by the buried depth of the pipeline, the size of the leakage point of the pipeline, the water pressure, the friction of the surrounding buried medium and the absorption coefficient under the limitation of the principle. The specific requirements according to relevant specifications are that the depth of an outdoor buried liquid pipeline is generally required to be below 700cm of a frozen soil layer, a special environment is buried below 900cm or 1m, and the deeper the pipeline is, the harder the pipeline is to be buried, the harder the pipeline is to be detected; the smaller the leakage point of the pipeline is, the larger the water pressure is, the louder the sound is; the larger the friction coefficient of the peripheral embedded medium is, the larger the noise is, the larger the interference sound is, and the more difficult the detection is; the larger the sound absorption coefficient of the peripheral embedded medium is, the more difficult the detection is; therefore, the ground audio detection device has more interference factors, and the ground audio detection device may not detect the situations of large burying depth, small leakage point and small water pressure.

Therefore, even with other detectors, it is often difficult to detect the leakage point of the pipeline. If the leakage point of the pipeline cannot be detected, the overhaul and the reconstruction are generally started, namely the whole pipeline is replaced, and the manufacturing cost is extremely high.

In order to solve the problems, CN207405659U discloses a tracing leakage detection well of a buried water supply pipeline, which comprises a well body and the water supply pipeline, wherein the well body comprises a well wall, the well wall is formed by stacking a plurality of bricks, two opposite positions at the bottom of the well wall are provided with openings, the water supply pipeline sequentially penetrates through the openings, the upper part of the well body is provided with a well body port, the well body port is provided with a movably sealed well cover, and the bottom surface of the well cover is provided with a tracing device; this patent utilizes the water supply pipe who exposes in the well to carry out the audion leak hunting, reaches the purpose of convenient, timely and accurate leak hunting, nevertheless seeks the restriction that the leak source still received adjacent well lid interval.

Those skilled in the art have sought to develop a back-attached buried fluid leak detection conduit that is capable of accurately detecting a leak without limitation.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defects in the prior art, the technical problem to be solved in the utility model is to provide a back of body formula buries fluid leak hunting pipeline that can not receive the limitation, and can accurately detect the leak source.

In order to achieve the purpose, the utility model provides a back-attached buried fluid leak detection pipeline, which comprises a main fluid pipeline, wherein the outer wall of the main fluid pipeline is provided with a leak detection pipe in a back-attached mode along the main fluid pipeline in the same direction, the leak detection pipe is provided with a leak detection port, and the leak detection port is provided with an end cap;

the leakage detecting pipe is positioned below the side wall of the main fluid pipeline, and an angle alpha formed by a connecting line of the center of the leakage detecting pipe and the center of the main fluid pipeline and a horizontal line is 25-60 degrees.

In order to improve the firmness and flexibility of the connection between the leakage detecting pipe and the main fluid pipeline, the main fluid pipeline and the leakage detecting pipe are fixed in a spot welding connection mode and/or a hoop connection mode.

Specifically, in order to ensure the firmness of connection and the flexibility of connection, the hoop comprises two hoop halves with the same structure;

the hoop half piece comprises a first connecting part, a second connecting part and a third connecting part, a main pipe hoop part is connected between the first connecting part and the second connecting part, and a leakage detecting pipe hoop part is connected between the second connecting part and the third connecting part;

threaded connection holes are formed in the first connecting portion, the second connecting portion and the third connecting portion.

Specifically, in order to ensure the firmness of spot welding connection, the leakage detecting pipe is fixed on the main fluid pipeline in a spot welding connection mode, the length of spot welding points of the spot welding connection mode is more than or equal to 50mm, and the distance between the spot welding points is less than or equal to 3000 mm.

In order to further improve the commonality of leak hunting pipe for the leak hunting mouth is located service valve below downhole department as far as possible, on the leak hunting pipe equidistant a plurality of leak hunting mouths of having seted up, and all set the end cap on every leak hunting mouth.

In order to facilitate finding a leakage detection pipe and a leakage detection port at the position of the service valve well and improve the detection efficiency, a branch pipe is arranged on the leakage detection port at the position of the service valve well, and the branch pipe is arranged vertically upwards;

the upper end of the branch pipe is provided with the leakage detecting opening, and the leakage detecting opening is provided with a plug.

In order to increase the detection range, the end part of the main fluid pipeline is provided with a connecting flange plate, and the outward-turning connecting part of the connecting flange plate is provided with a leakage detecting pipe through hole.

In order to ensure that the leakage detecting pipe can be laid along the side edge of the main fluid pipeline all the time, the detection range of the leakage detecting pipe is further enlarged, and the leakage detecting pipe is an aluminum-plastic composite pipe.

In order to reduce the cost, improve the utility model discloses a suitability, the leak detection pipe is the small-bore pipeline.

The utility model keeps the smoothness inside the leakage detecting pipe by arranging the leakage detecting pipe on the main fluid pipeline, and can insert the detecting pipe into the leakage detecting pipe and arrange a high-sensitivity audio acquisition sensor on the detecting pipe when the buried liquid pipeline leaks; when a leakage point is detected, firstly, opening a maintenance valve well, then inserting a detection tube with a high-sensitivity audio acquisition sensor into the leakage detection tube, and when the detection tube reaches the leakage point, the sensor transmits a signal back to the surface to further detect the leakage point because the detection tube and the main fluid pipeline are integrally laid; the utility model discloses it is high to detect the leak source accuracy, and the interference factor that detects and receive is little, does not have the detection limitation.

Drawings

FIG. 1 is a reference diagram of the use state of the invention in detecting a leak;

FIG. 2 is a cross-sectional view of the present invention as laid;

FIG. 3 is a cross-sectional view of the utility model when fixed by hoop;

FIG. 4 is a schematic structural view of the hoop shown in FIG. 3;

FIG. 5 is a cross-sectional view of the present invention when fixed by spot welding;

FIG. 6 is a schematic view showing a three-dimensional structure of the present invention when spot welding is adopted;

FIG. 7 is a schematic view of a second three-dimensional structure of the present invention when spot welding is adopted;

in the figure: 1-a main fluid conduit; 2-a leakage detecting pipe; 21-leakage detection port; 22-plug; 23-branch pipes;

3-hoop holding; 31-anchor ear half-piece; 31 a-a first connection; 31 b-main pipe hoop part; 31 c-a second connecting portion; 31 d-a leakage detecting pipe hoop part; 31 e-a third connecting portion;

4-a flange plate; 41-perforating a leakage detecting pipe; 5-flexible snake-shaped detection tubes; 6-high sensitivity audio acquisition sensor; 7-pipeline leakage points; 8-a computer; 9-water supply valve;

in the figure: the angle formed by the connecting line of the center of the alpha-leakage detecting pipe and the center of the main fluid pipeline and the horizontal line;

i1-fine sand bedding; i2-gravel soil backfill layer; i3-original soil layered backfill layer; l1-spot weld length; l2-adjacent dot pad spacing;

description of the drawings: FIG. 6 is a schematic perspective view of a water supply valve with a single flange; FIG. 7 is a schematic perspective view of a water supply valve with double flanges.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, wherein it is noted that, in the description of the invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular manner, and therefore should not be construed as limiting the present invention. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example 1

As shown in fig. 1 to 7, a back-attached type buried fluid leak detection pipeline includes a main fluid pipe 1, a leak detection pipe 2 is arranged on an outer wall of the main fluid pipe 1 in a back-attached manner along the main fluid pipe in the same direction, a leak detection opening 21 is formed in the leak detection pipe 2, and a plug 22 is arranged on the leak detection opening 21. When the leakage detecting device is used, the plug 22 is opened, and the detecting instrument is inserted into the leakage detecting pipe 2, so that detection can be carried out.

As shown in fig. 2, the construction layer of the general buried fluid main pipeline comprises three layers, wherein the first layer is marked as I1 in fig. 2, the layer is a fine sand cushion layer, the soil-stone ratio is 5:5, and the backfill compactness is more than 92%; the second layer is marked by I2 in figure 2 and is a gravel soil backfill layer, the soil-stone ratio is 5:5, and the backfill compactness is more than 87%; the third layer is marked by I3 in figure 2, which is an original soil layered backfill layer with the backfill compactness of more than 95 percent;

in order to protect the leakage detecting pipe 2, the leakage detecting pipe 2 is positioned below the side wall of the main fluid pipeline 1, so that the leakage detecting pipe is buried in a fine sand cushion layer, the layer has a stable structure, and the leakage detecting pipe 2 is favorably prevented from falling off from the main fluid pipeline 1; meanwhile, the structure is also beneficial to mounting the water supply valve 9 on the main fluid pipeline, so that the leakage detecting pipe 2 bypasses the periphery of the outer side of the water supply valve 9;

in addition, in order to avoid burying soil, soil is direct to be pressed on the leak detection pipe, after long-time pressurized, causes the leak detection pipe to drop from the fluid trunk line, the utility model discloses the angle alpha that forms with the horizontal line with the line at leak detection pipe 2 center and fluid trunk line 1 center is 25 degrees-60 degrees, and alpha is for can be 25 °, 30 °, 35 °, 40 °, 45 °, 50 °, 55 °, 60 in the actual implementation process, and the concrete 25 that adopts in this embodiment can alleviate soil pressure through the slope setting, increases the life of pipeline.

In order to improve the connection firmness and flexibility of the leakage detecting pipe and the main fluid pipeline, the main fluid pipeline 1 and the leakage detecting pipe 2 are connected in a spot welding mode, and/or a hoop connecting mode is fixed.

In the embodiment, the hoop connecting mode is selected for fixing the leakage detecting pipe and the main fluid pipeline, and specifically, the hoop 3 comprises two hoop halves 31 with the same structure;

the hoop half-piece 31 comprises a first connecting part 31a, a second connecting part 31c and a third connecting part 31e, and threaded connecting holes are formed in the first connecting part 31a, the second connecting part 31c and the third connecting part 31 e; more preferably, the hoop in this embodiment is made of galvanized flat iron. A main pipe hoop part 31b is connected between the first connecting part 31a and the second connecting part 31c, and a leakage detecting pipe hoop part 31d is connected between the second connecting part 31c and the third connecting part 31 e; the main pipe hoop part 31b is used for wrapping the main fluid pipe, and the leakage detecting pipe hoop part 31d is used for wrapping the leakage detecting pipe 2. During the use, cover two staple bolt half 31 respectively on being responsible for the staple bolt portion of embracing and leak detection pipe staple bolt portion, then connect first connecting portion 31a, second connecting portion 31c and third connecting portion 31e on two staple bolt half 31 respectively through the bolt, lock the staple bolt through three connecting portion, can be in the same place the firm fixing of leak detection pipe and fluid trunk line, guaranteed the fastness that fluid trunk line and leak detection pipe are connected.

In other embodiments, the fixing mode of the leakage detecting pipe and the main fluid pipeline can also select a spot welding connection mode, if the leakage detecting pipe 2 is fixed on the main fluid pipeline 1 through the spot welding connection mode, the length of a spot welding point is required to be larger than 50mm, specifically 50mm, 60mm, 70mm, 80mm, 100mm, 200mm and the like, and the distance between welding points of adjacent points is smaller than 3000mm, specifically 1000mm, 2000mm, 3000mm and the like. In this embodiment, the length of the point welding point is 200mm (shown as L1 in fig. 7), and the distance between adjacent point welding points is 3000mm (shown as L2 in fig. 7), so as to ensure the connection firmness of the leakage detecting pipe and the main fluid pipeline.

In other embodiments, can also choose for use spot welding connected mode and staple bolt connected mode simultaneously and fix leakage detecting pipe and fluid trunk line, can consolidate the fastness of leakage detecting pipe and fluid trunk line connection, be favorable to improving the utility model discloses a life.

In order to further improve the commonality of examining the leak hunting pipe, examine the leak hunting pipe 2 and go up equidistant a plurality of leak hunting mouths 21 of having seted up, all set the end cap 22 on every leak hunting mouth 21, guaranteed that there is the leak hunting mouth maintenance valve well below, when increasing the maintenance, the inlet port of maintenance instrument improves the convenience of overhauing.

More preferably, be located and be equipped with branch pipe 23 on the leak hunting mouth 21 of service valve well department, the vertical upwards setting of branch pipe 23, the upper end of branch pipe 23 for examining leak hunting mouth 21, examine and set end cap 22 on the leak hunting mouth 21, be convenient for find at service valve well department and examine the leak hunting and manage and examine the leak hunting, improve detection efficiency.

More preferably, in this embodiment, 1 tip of main fluid pipeline is equipped with connecting flange 4, is equipped with on the connecting portion of turning up of connecting flange 4 and examines the perforated pipe 41 of leak hunting pipe for installation and fixed leak hunting pipe 2 make a leak hunting pipe 2 lay along main fluid pipeline 1 always, prolonged the distance of laying of leak hunting pipe 2 greatly, improved the scope that detects, be favorable to reducing the detection cost.

More preferably, in the embodiment, the leak detection pipe 2 is an aluminum-plastic composite pipe. Because of the inside smoothness of plastic-aluminum composite tube, reduced the resistance that moves including detecting instrument (the detecting tube that is equipped with high sensitive audio acquisition sensor promptly), in addition because it has certain deformability, when meetting the valve between fluid trunk line and the fluid trunk line, the appropriate bending of accessible continues to be fixed with the fluid trunk line along the valve shape, further guarantees to examine the side that the leak hunting was managed can be laid along the fluid trunk line always, great increase the detection range who examines the leak hunting.

Leak detection pipe 2 reduces for the small-bore pipeline the utility model discloses a cost and use cost improve the utility model discloses an adaptability.

The utility model discloses mainly used feedwater earlier with the back of the body attaches formula and buries fluid leak hunting pipeline and lay in after the underground. If a flowmeter or a mechanical water replenishing device in the water delivery system is frequently started in the using process, monitoring personnel of the water supply system can presume that the buried drain pipeline has leakage; then, water supply system maintainers find valve maintenance wells according to the design of water supply pipelines, close the valves in sections and judge the approximate range of leakage points of the water supply pipelines; and then finding the service valve well in the range, opening the service valve well, and inserting a flexible snake-shaped detection tube 5 with a high-sensitivity audio acquisition sensor 6 at the front end into the leakage detection port of the branch tube. Specifically, the utility model discloses the model of chooseing for use is RS485/4-20mA 0-10v TTL noise transmitter as high sensitive audio acquisition sensor, pass through the audio signal line with the detected signal of sensor and introduce audio amplifier, reentry computer 8 passes through audio frequency processing software comparison background noise and on-the-spot collection audio frequency, when on-the-spot collection audio frequency is great with background noise difference, can confirm the leak source, then again according to the length of flexible snakelike search tube, combine original completion map or the distance of overhaul well, confirm pipeline leak source 7's accurate position, the process of whole detection leak source is simple, it is swift, and do not receive the soil of burying underground, bury the external factors influence such as the depth underground, the testing result is accurate.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A back-attached type buried fluid leakage detection pipeline is characterized in that: the leakage detection device comprises a main fluid pipeline (1), wherein a leakage detection pipe (2) is arranged on the outer wall of the main fluid pipeline (1) in a back attachment mode along the main fluid pipeline in the same direction; a leakage detection opening (21) is formed in the leakage detection pipe (2); a plug (22) is arranged on the leakage detecting opening (21);

the leakage detecting pipe (2) is positioned below the side wall of the main fluid pipeline (1); and the angle alpha formed by the connecting line of the center of the leakage detecting pipe (2) and the center of the main fluid pipeline (1) and the horizontal line is 25-60 degrees.

2. The back-attached buried fluid leak detection conduit as set forth in claim 1, wherein: the main fluid pipeline (1) and the leakage detecting pipe (2) are fixed in a spot welding connection mode and/or a hoop connection mode.

3. The back-attached buried fluid leak detection conduit as set forth in claim 2, wherein: the hoop (3) comprises two hoop halves (31) with the same structure;

the hoop half-piece (31) comprises a first connecting part (31 a), a second connecting part (31 c) and a third connecting part (31 e); a main pipe hoop part (31 b) is connected between the first connecting part (31 a) and the second connecting part (31 c), and a leakage detecting pipe hoop part (31 d) is connected between the second connecting part (31 c) and the third connecting part (31 e);

threaded connection holes are formed in the first connection portion (31 a), the second connection portion (31 c) and the third connection portion (31 e).

4. The back-attached buried fluid leak detection conduit as set forth in claim 2, wherein: the leakage detecting pipe (2) is fixed on the main fluid pipeline (1) in a spot welding connection mode; the length of the spot welding points of the spot welding connection mode is more than or equal to 50mm, and the distance between the spot welding points is less than or equal to 3000 mm.

5. The back-attached buried fluid leak detection conduit as set forth in claim 1, wherein: a plurality of leakage detecting openings (21) are formed in the leakage detecting pipe (2) at equal intervals, and plugs (22) are arranged on each leakage detecting opening (21).

6. The back-attached buried fluid leak detection conduit as set forth in claim 5, wherein: a branch pipe (23) is arranged on a leakage detection port (21) positioned at the position of the service valve well, and the branch pipe (23) is arranged vertically upwards;

the upper end part of the branch pipe (23) is the leakage detecting opening (21), and a plug (22) is arranged on the leakage detecting opening (21).

7. A back-attached buried fluid leak detection conduit as claimed in any one of claims 1 to 6, wherein: the end part of the main fluid pipeline (1) is provided with a connecting flange plate (4), and the eversion connecting part of the connecting flange plate (4) is provided with a leakage detecting pipe through hole (41).

8. The back-attached buried fluid leak detection conduit as set forth in claim 7, wherein: the leakage detecting pipe (2) is an aluminum-plastic composite pipe.

9. A back-attached buried fluid leak detection conduit as claimed in any one of claims 1 to 6, wherein: the leakage detecting pipe (2) is a small-caliber pipeline.