CN211344464U

CN211344464U - Direct-buried heat-insulation steam pipe with pipeline leakage monitoring function

Info

Publication number: CN211344464U
Application number: CN201922195086.9U
Authority: CN
Inventors: 张声振
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-08-25
Anticipated expiration: 2029-12-10

Abstract

The utility model relates to a possess direct-burried heat preservation steam pipe that monitors pipeline leakage function, including the working pipe, one section distance of every on the working pipe axis direction is equipped with the guide bracket that is connected with the outer tube, be equipped with the heat preservation outside the working pipe between two adjacent guide bracket, the heat preservation is equipped with the water conservancy diversion hole along pipeline axis direction, the downward vertical direction in water conservancy diversion hole has preset the temperature measurement region bottom the outer tube, temperature measurement region from interior to exterior is temperature measurement optic fibre, threading sheath pipe and moisture absorption protective layer, be provided with on the guide bracket on the flexible wall fender layer laminating outer tube inner wall, between heat preservation outer fringe and the adjacent guide bracket and the outer tube inner wall is formed with airtight cavity. Has the advantages that: the utility model provides a in the past this type product seepage monitoring reliability, sensitivity, positioning accuracy homodyne reach not reach the difficult problem of in-service use, avoid from this bringing can not only the time maintenance loss stopping and probably lead to the emergence of serious incident.

Description

Direct-buried heat-insulation steam pipe with pipeline leakage monitoring function

Technical Field

The utility model relates to a steam pipe device technical field, concretely relates to possess direct-burried heat preservation steam pipe of monitoring pipeline leakage function.

Background

The effective leakage monitoring of municipal heating steam pipe network by direct burial laying is a difficult problem to be solved urgently for years in the industry, and the effective solution has important significance for the safety and the economical efficiency of the pipe network. The current direct-buried heat-insulating steam pipe mainly adopts a steel sleeve steel double-layer composite pipe structure (steel trench), and the pipeline leakage can be caused by the damage of an inner steel pipe and an outer steel pipe, so the monitoring and the judgment of the leakage (seepage) condition are more complex. According to our side a large amount of destructive experiments have been done and have been known, when steam leakage took place for inner tube some point, because what the heat preservation adopted is the layering, the connection was wrapped to the multistage and the many gaps that lead to are loose structure, steam breaks through resistance weak point in the heat preservation rapidly under the effect of internal pressure and gets into in the cavity between inner tube and outer sleeve and axial diffusion, has very big randomness, constantly touch resistance point many times partial backward flow again along the way, cause to use the leakage point very disorderly as original point cavity temperature field both ends axial distribution. When a small amount of groundwater initially permeates into a cavity gap between the inner pipe and the outer pipe through the outer sleeve pipe due to corrosion, the groundwater is gradually gasified at high temperature and is slowly discharged from the moisture discharge pipe, along with the gradual expansion of the corrosion surface of the outer sleeve pipe, the permeation water amount is gradually increased, and the inner wall of the outer sleeve pipe is secondarily corroded from inside to outside to cause the integral corrosion degree of the pipeline to be intensified.

The pipeline leakage monitoring that current steam pipe net direct-burried mode was laid generally realizes through the method that sets up the hydrofuge hole on the pipeline, but its real-time nature, reliability, sensitivity and positioning accuracy all can not reach the degree that the in-service use required to bring great potential safety hazard, this technique can effectively solve this problem, avoids the emergence that can not in time discover, the maintenance loss stopping and probably lead to serious incident from this bringing.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a monitoring sensitivity and positioning accuracy are high, the security performance is good, be convenient for install maintenance work's the formula of burying directly that possesses monitoring pipeline leakage function steam pipe, realize through following scheme.

In order to realize the above purpose, the utility model discloses a technical scheme be: a direct-buried heat-insulating steam pipe combined with a DTS system and having a function of monitoring leakage of a pipeline comprises a working pipe, wherein the edge of the outer wall of the working pipe is connected with an outer sleeve through a guide support (the non-support part is a heat-insulating layer), the direct-buried heat-insulating steam pipe is characterized in that the guide support connected with the outer sleeve is arranged at intervals in the axial direction of the working pipe, the heat-insulating layer is arranged outside the working pipe between two adjacent guide supports, the heat-insulating layer is provided with a flow guide hole in the axial direction of the pipeline, the flow guide hole is downwards vertical (in the gravity direction) to a preset temperature measurement area at the bottom (in the gravity direction) of the outer sleeve, the temperature measurement area comprises a temperature measurement optical fiber, a threading protective pipe and a moisture absorption protective layer from inside to outside, the guide support is provided with a flexible partition barrier layer attached to the inner wall of the outer sleeve, a closed cavity is, and the temperature measuring optical fiber in the temperature measuring (optical fiber) area is connected to the DTS system host.

Furthermore, the DTS system host comprises an optical fiber sensing analyzer connected with a temperature measuring optical fiber, wherein the output end of the optical fiber sensing analyzer is respectively connected with a liquid crystal display screen, a remote control end, a short message alarm and an audible and visual alarm, and the optical fiber sensing analyzer is used for collecting optical signals and converting the optical signals into temperature signals.

Furthermore, one end of the optical fiber sensing analyzer is provided with a pipeline channel connected with the temperature measuring optical fiber.

Furthermore, a threading protective sleeve is arranged outside the temperature measuring optical fiber and is embedded in the moisture absorption protective layer.

Furthermore, the guide supports are axially arranged in the outer sleeve according to a certain distance requirement, annular flexible partition layers are arranged on the guide supports and connected with the inner wall of the outer sleeve, and a closed cavity is formed between every two adjacent guide supports.

The technical effects of the utility model reside in that:

the pipeline is combined with a DTS monitoring system through structure optimization design, the functions of simultaneously monitoring leakage of an inner pipe and leakage of an outer pipe of the pipeline in real time and positioning leakage points are realized, the problem that the reliability, sensitivity and positioning precision are poor and cannot meet the actual requirements due to the fact that the leakage monitoring of the pipeline is realized by arranging a wet discharging hole method in the prior art is solved, and the problems that time-out maintenance and loss stopping are impossible and serious safety accidents are possibly caused are avoided.

Secondly, the DTS system host can accommodate 8 channels at most, can monitor 8 pipelines in real time simultaneously, has the longest monitoring distance of about 10km for a single pipeline, can expand networking, and realizes the integral real-time monitoring of the buried steam pipeline network.

Drawings

FIG. 1 is a schematic view of a cross-section of a direct-buried thermal insulation steam pipe with a function of monitoring pipeline leakage according to the present invention;

FIG. 2 is a schematic right-view sectional view of the directly-buried thermal insulation steam pipe with the function of monitoring pipeline leakage according to the present invention;

fig. 3 is a schematic diagram of the DTS system host connection of the present invention.

Reference numerals: 1-a working pipe; 2-insulating layer; 3-outer sleeve; 4-a guide bracket; 5-diversion holes; 6-heat preservation gap; 7-moisture absorption protective layer; 8-sealing the cavity; 9, a flexible partition barrier layer; 10-temperature measuring optical fiber; 11-DTS system host; 12-threading sheath pipe.

Detailed Description

Referring to the attached drawings 1-3, a direct-buried heat preservation steam pipe with a function of monitoring pipeline leakage comprises a working pipe 1, wherein the edge of the outer wall of the working pipe 1 is connected with an outer sleeve 3 through a guide support 4, a heat preservation layer 2 is arranged outside the working pipe between two adjacent guide supports, a flow guide hole 5 is arranged on the heat preservation layer 2 along the axis direction of a pipeline, the flow guide hole 5 points to a temperature (optical fiber) region 6 preset at the bottom (gravity direction) of the outer sleeve 3 downwards and vertically (gravity direction), the temperature (optical fiber) region 6 is internally and externally provided with a temperature measurement optical fiber 10, a threading sheath pipe 12 and a moisture absorption protective layer 7, a flexible partition baffle layer 9 is arranged on the guide support 4 and is attached to the inner wall of the outer sleeve 3, a closed cavity 8 is formed among the outer sleeve 3, the heat preservation layer 2 and the flexible partition baffle layer 9 arranged on the adjacent guide support 4, and the temperature measurement optical fiber 10 in the temperature (optical, the DTS system host 11 comprises an optical fiber sensing analyzer connected with the temperature measuring optical fiber 10, the output end of the optical fiber sensing analyzer is respectively connected with a liquid crystal display screen, a remote control end, a short message alarm and an audible and visual alarm, the optical fiber sensing analyzer is used for collecting optical signals and converting the optical signals into temperature signals, and one end of the optical fiber sensing analyzer is provided with a pipeline channel connected with the temperature measuring optical fiber 10.

The specific embodiment of the scheme is that when the working pipe 1 is damaged to cause steam leakage, the steam flows out along the flow guide holes 5 in the heat preservation layer 2 (downwards and vertically points to the temperature measurement optical fiber area preset at the bottom of the outer protection pipe), and is collected and fixed in the closed cavity 8 formed by the partition between the two guide supports 4 and the flexible partition blocking layer 9 and the outer sleeve 3 arranged on the two guide supports in a short time, so that the temperature of the section of the pipe cavity is rapidly increased. The temperature abrupt rise is measured by the temperature measuring optical fiber 10 in the area, and a signal is transmitted to the DTS system host 11, and the system sends out an alarm prompt and positions (axial) leakage points. When underground water leakage occurs at any point of the outer protective steel sleeve (cross section), water leaks into the pipe cavity under the action of gravity, then gathers at the bottom of the outer protective sleeve 3 and is adsorbed on a moisture absorption protective layer 7 (the protective layer is also segmented and separated (about 1 m/segment)) covering the outer surface of the temperature measurement optical fiber 10, the temperature mutation of the temperature measurement optical fiber 10 in the region is reduced, a signal is transmitted to a DTS system host 11, and the system sends an alarm prompt and positions (axial) leakage points.

The specific embodiment of the scheme is that an optical fiber sensing analyzer in the host 11 of the DTS system is used for collecting optical signals, converting the optical signals into temperature signals, processing the data and displaying the temperature signals through a display screen, and when the data or the change rate of the data exceeds a certain threshold value, such as temperature, an alarm function can be timely realized through short messages or sound and light.

Preferably, the guide supports 4 and the flexible partition blocking layer 9 arranged on the guide supports are attached to the inner portion of the outer sleeve 3, the axial distance between every two adjacent guide supports 4 meets the relevant design requirements, and the temperature measuring optical fiber 10 is provided with an optical fiber threading protective sleeve 12 and an external application moisture absorption protective layer 7.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A direct-buried heat-insulating steam pipe with a pipeline leakage monitoring function comprises a working pipe (1), wherein the outer wall edge of the working pipe (1) is connected with an outer sleeve (3) through a guide support (4), and the direct-buried heat-insulating steam pipe is characterized in that the guide support (4) connected with the outer sleeve (3) is arranged on the working pipe (1) at intervals in the axial direction of the working pipe (1), a heat-insulating layer (2) is arranged outside the working pipe (1) between every two adjacent guide supports (4), the heat-insulating layer (2) is provided with a flow guide hole (5) in the axial direction of a pipeline, the flow guide hole (5) vertically points downwards and presets a temperature measuring area (6) at the bottom of the outer sleeve (3), the temperature measuring area (6) is provided with a temperature measuring optical fiber (10), a threading protective sleeve (12) and a moisture absorption protective layer (7) from inside to outside, a flexible partition layer (9) is, and a closed cavity (8) is formed between the outer edge of the heat-insulating layer (2) and the adjacent guide support (4) and on the inner wall of the outer sleeve (3), and a temperature measuring optical fiber (10) in the temperature measuring area (6) is connected to a DTS system host (11).

2. The direct-buried heat-preservation steam pipe with the function of monitoring the pipeline leakage according to claim 1, wherein the DTS system host (11) comprises an optical fiber sensing analyzer connected with the temperature measuring optical fiber (10), the output end of the optical fiber sensing analyzer is respectively connected with a liquid crystal display screen, a remote control end, a fire controller, a short message alarm and an audible and visual alarm, and the optical fiber sensing analyzer is used for collecting optical signals and converting the optical signals into temperature signals.

3. The direct-buried thermal insulation steam pipe with the function of monitoring the pipeline leakage as claimed in claim 2, wherein a pipeline channel connected with the temperature measuring optical fiber (10) is arranged at one end of the optical fiber sensing analyzer.

4. The direct-buried heat preservation steam pipe with the function of monitoring the pipeline leakage as claimed in claim 1, characterized in that the guide supports (4) are annularly arranged inside the outer casing (3), and the distance between adjacent guide supports (4) is equal.

5. The direct-buried heat-preservation steam pipe with the function of monitoring the pipeline leakage as claimed in claim 1, characterized in that a threading sheath pipe (12) is arranged outside the temperature measuring optical fiber (10) and is buried in the moisture absorption protective layer (7).