CN110411391B - Pipeline axial displacement detection device and method - Google Patents
Pipeline axial displacement detection device and method Download PDFInfo
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- CN110411391B CN110411391B CN201910603220.6A CN201910603220A CN110411391B CN 110411391 B CN110411391 B CN 110411391B CN 201910603220 A CN201910603220 A CN 201910603220A CN 110411391 B CN110411391 B CN 110411391B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
Abstract
The invention discloses a pipeline axial displacement detection device and a method, belonging to the technical field of detection, wherein the pipeline axial displacement detection device comprises: an annular sleeve, a length sensor and a displacement determining assembly; the annular sleeve is sleeved on the pipeline to be detected, and soil is filled between the annular sleeve and the pipeline to be detected; the length sensor comprises a first end and a second end, the first end is connected with a first designated position of the outer wall of the pipeline to be detected, the second end is connected with a second designated position of the annular sleeve, and the length sensor is used for measuring the distance between the first end and the second end; and the displacement determining component is connected with the length sensor and is used for determining the axial displacement of the pipeline to be detected according to the change of the distance between the first end and the second end. The problem of unable axial displacement who detects oil gas pipeline among the correlation technique is solved, axial displacement's effect has been reached to the detection.
Description
Technical Field
The invention relates to the technical field of detection, in particular to a device and a method for detecting axial displacement of a pipeline.
Background
The geological disaster refers to abnormal energy release, material movement, deformation and displacement of rock-soil body, abnormal change of environment and the like of earth under the action of internal power, external power or artificial geological power of the earth, wherein the deformation and displacement of the rock-soil body can cause soil to generate thrust so as to cause displacement of oil-gas pipelines buried in the soil.
In the prior art, an automatic displacement detection method based on static level is used for detecting the displacement of an oil and gas pipeline. The method comprises the steps of arranging a reference water tank at a reference point, arranging a water tank at each monitoring point, communicating the monitoring point water tank with the reference point water tank, and calculating the settlement of the monitoring points by measuring the liquid level change so as to obtain the displacement condition of the oil-gas pipeline.
In the process of implementing the invention, the inventor finds that the above mode has at least the following defects: the displacement detection technology can only detect the vertical displacement (radial displacement) of the oil and gas pipeline, and cannot detect the axial displacement of the oil and gas pipeline.
Disclosure of Invention
In order to solve the problem that the vertical displacement (radial displacement) of an oil and gas pipeline can only be detected and the axial displacement of the oil and gas pipeline cannot be detected in the related art, the embodiment of the invention provides a pipeline axial displacement detection device and method. The technical scheme is as follows:
according to a first aspect of the present invention, there is provided a pipe axial displacement detection apparatus comprising:
an annular sleeve, a length sensor and a displacement determining assembly;
the annular sleeve is sleeved on the pipeline to be detected, and soil is filled between the annular sleeve and the pipeline to be detected;
the length sensor comprises a first end and a second end, the first end is connected with a first designated position of the outer wall of the pipeline to be detected, the second end is connected with a second designated position of the annular sleeve, and the length sensor is used for measuring the distance between the first end and the second end;
the displacement determining assembly is connected with the length sensor and used for determining the axial displacement of the pipeline to be detected according to the change of the distance between the first end and the second end.
Optionally, the displacement determining component is configured to determine an axial displacement of the pipe to be detected according to a displacement determining formula, where the displacement determining formula is:
wherein L isA'BIs the distance, L, between the second end and the first end of the length sensor after displacementABIs the distance between the second end of the length sensor and the first end before displacement, LOBThe relative distance L between the second specified position of the annular sleeve and the pipeline to be detectedAA'And the displacement distance of the pipeline to be detected is obtained.
Optionally, the outer diameter of the annular sleeve is 20% greater than the inner diameter of the annular sleeve.
Optionally, the difference between the outer diameter and the inner diameter and the quality of the annular sleeve are inversely related to the compactness of the soil.
Optionally, the annular sleeve includes a first half ring and a second half ring, and the first half ring and the second half ring are flanged.
According to a second aspect of the present invention, there is provided a pipe axial displacement detection method, the method comprising:
sleeving an annular sleeve ring on a pipeline to be detected;
filling soil between the annular sleeve and the pipeline to be detected;
a length sensor is arranged on the pipeline to be detected,
the length sensor comprises a first end and a second end, the first end of the length sensor is connected with a first designated position of the outer wall of the pipeline to be detected, the second end of the length sensor is connected with a second designated position of the annular sleeve, and the length sensor is used for measuring the distance between the first end and the second end;
and determining the axial displacement of the pipeline to be detected according to the distance change between the first end and the second end.
Optionally, the determining the axial displacement of the pipe to be detected according to the change in the distance between the first end and the second end includes:
determining the axial displacement of the pipeline to be detected according to a displacement determination formula, wherein the displacement determination formula is as follows:
wherein L isA'BIs the distance, L, between the second end and the first end of the length sensor after displacementABIs the distance between the second end of the length sensor and the first end before displacement, LOBThe relative distance L between the second specified position of the annular sleeve and the pipeline to be detectedAA'And the displacement distance of the pipeline to be detected is obtained.
Optionally, the outer diameter of the annular sleeve is 20% greater than the inner diameter of the annular sleeve.
Optionally, the difference between the outer diameter and the inner diameter and the quality of the annular sleeve are inversely related to the compactness of the soil.
Optionally, the annular sleeve includes a first half ring and a second half ring, and the first half ring and the second half ring are fastened to the pipeline to be detected through flange connection.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
through a pipeline axial displacement detection device including annular sleeve length sensor and displacement determination subassembly, wherein the annular sleeve cover is waited to detect on the pipeline, and the annular sleeve with wait to detect to fill between the pipeline and have soil, length sensor's first end is connected with the first assigned position of waiting to detect the pipeline outer wall, length sensor's second end is connected with annular sleeve's second assigned position, length sensor is used for measuring the distance between first end and the second end, the displacement determination subassembly is connected with length sensor, be used for according to the axial displacement who waits to detect the pipeline of the distance change between first end and the second end. The problem of unable axial displacement who detects oil gas pipeline among the correlation technique is solved, axial displacement's effect has been reached to the detection.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of a pipeline axial displacement detection device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another pipeline axial displacement detection device provided by the embodiment of the invention;
FIG. 3 is a side view of the pipe axial displacement sensing device shown in FIG. 2;
fig. 4 is a flowchart of a method for detecting axial displacement of a pipeline according to an embodiment of the present invention.
With the above figures, certain embodiments of the invention have been illustrated and described in more detail below. The drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it by those skilled in the art with reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
The pipeline can produce certain deformation at the in-process of displacement, and the deformation of pipeline can cause pipeline crackle etc. to lead to the pipeline to leak, can be in order to judge whether the pipeline is in latent dangerous states such as deformation through the radial displacement who detects the pipeline among the prior art, but can only detect the radial displacement of pipeline among the prior art, thereby the axial displacement of pipeline also can produce pipeline deformation and cause the potential safety hazard.
The embodiment of the invention provides a device and a method for detecting axial displacement of a pipeline, which can solve the problem in the related art.
Fig. 1 is a schematic structural diagram of a pipeline axial displacement detection device according to an embodiment of the present invention. The pipe axial displacement detecting device 10 may include:
an annular sleeve 11, a length sensor 12 and a displacement determining assembly 13.
The annular sleeve 11 is sleeved on the pipeline 20 to be detected, and soil is filled between the annular sleeve 11 and the pipeline 20 to be detected.
The length sensor 12 comprises a first end 121 and a second end 122, the first end 121 being connected to a first designated position 21 of the outer wall of the pipe 20 to be tested, the second end 122 being connected to a second designated position 111 of the annulus 11, the length sensor 12 being adapted to measure the distance between the first end 121 and the second end 122.
And the displacement determining component 13, the displacement determining component 13 is connected with the length sensor 12, and the displacement determining component 13 is used for determining the axial displacement of the pipeline to be detected according to the distance change between the first end 121 and the second end 122.
In summary, the embodiment of the present invention provides a pipeline axial displacement detection apparatus including an annular sleeve length sensor and a displacement determining component, wherein the annular sleeve is sleeved on a pipeline to be detected, soil is filled between the annular sleeve and the pipeline to be detected, a first end of the length sensor is connected to a first designated position on an outer wall of the pipeline to be detected, a second end of the length sensor is connected to a second designated position of the annular sleeve, the length sensor is configured to measure a distance between the first end and the second end, and the displacement determining component is connected to the length sensor and is configured to determine an axial displacement of the pipeline to be detected according to a change in the distance between the first end and the second end. The problem of unable axial displacement who detects oil gas pipeline among the correlation technique is solved, axial displacement's effect has been reached to the detection.
Referring to fig. 2, a schematic structural diagram of another pipeline axial displacement detection device provided in an embodiment of the present invention is shown, where the pipeline axial displacement detection device may include:
optionally, the first end of the length sensor 12 is connected to a first designated position on the outer wall of the pipe 20 to be detected, that is, a point a in fig. 2, a point a' is a position where the first end of the displaced point a is connected to the outer wall of the pipe 20 to be detected, the second end of the length sensor is connected to a second designated position of the annular sleeve 11, that is, a point B in the drawing, and a point O is an orthographic projection of the point B on the pipe 20 to be detected. The length sensor 12 is a telescopic sensor for measuring length, and since the space between the pipe 20 to be detected and the annular sleeve 11 is filled with soil 30, when the pipe 20 to be detected undergoes radial displacement (settlement), the annular sleeve 11 and the pipe 20 to be detected form a whole, and radial displacement occurs simultaneously, that is, the relative positions of the point O and the point B in the radial direction do not change.
In the process of generating axial displacement of the pipeline 20 to be detected, the point B connected with the second designated position of the annular sleeve 11 at the second end of the length sensor 12 is fixed, the length sensor 12 is elongated, at this time, the first end of the length sensor 12, namely the point a, moves to the point a' along with the displacement of the pipeline, the sensor acquires the moved data, and the displacement distance of the pipeline to be detected can be obtained by using the displacement determining component. The displacement determining component is connected with the length sensor 12, and the displacement determining component can be arranged on the pipeline 20 to be detected, can also be arranged on the annular sleeve 11, and can also be connected with the length sensor on the ground in a wireless connection or data line connection mode. The length sensor 12 may be a vibrating wire displacement meter, or may be another length sensor, and the embodiment of the present invention is not limited herein.
Optionally, the displacement determining assembly is configured to determine an axial displacement of the pipe 20 to be detected according to a displacement determining formula, where the displacement determining formula is:
wherein L isA'BIs the distance between the second end and the first end of the displaced length sensor, LABIs the distance between the second end and the first end of the length sensor before displacement, LOBIs the relative distance L between the second specified position of the annular sleeve and the pipeline to be detectedAA'Is the displacement distance of the pipe to be detected.
Optionally, the outer diameter a of the annular sleeve 11 is 20% larger than the inner diameter b of the annular sleeve 11. Soil 30 is filled between the annular sleeve 11 and the pipeline 20 to be detected and compacted, and at the moment, the soil 30 plays a role in embedding, namely when the pipeline 20 to be detected is displaced in the radial direction, the annular sleeve 11 and the pipeline 20 to be detected move synchronously, so that the relative position between the annular sleeve 11 and the pipeline 20 to be detected in the radial direction is unchanged. The annular sleeve may be provided with a certain thickness (i.e. the difference between the outer diameter and the inner diameter) in the radial direction so that the annular sleeve has a certain weight to avoid the annular sleeve from shifting under the thrust of the soil. The outer diameter a of the annular sleeve may also be larger than the inner diameter b of the annular sleeve by 100 mm, which is not limited herein.
Alternatively, the difference between the outer diameter and the inner diameter of the annulus 11 and the quality are inversely related to the compaction of the soil. When the filling soil between the pipe 20 to be detected and the annulus 11 is soft soil, the difference between the outer diameter and the inner diameter of the annulus 11 can be increased properly, and when the difference between the outer diameter and the inner diameter of the annulus 11 is increased, the weight of the annulus 11 is increased accordingly. Illustratively, when the soil filled between the annular sleeve 11 and the pipe 20 to be detected is soft, the diameter of the pipe 20 to be detected is 529 mm, the inner diameter of the annular sleeve 11 is 1000 mm, the outer diameter is 1200 mm, and the length in the axial direction is 200 mm.
Fig. 3 is a side view of the pipe axial displacement detecting apparatus shown in fig. 2. Optionally, the annular sleeve 11 comprises a first half ring 112 and a second half ring 113, and the first half ring 112 and the second half ring 113 are flanged. The flange connection structure is simple, the connection is reliable, the dismounting and mounting are convenient, one of the first half ring 112 and the second half ring 113 is opened before the annular sleeve 11 is installed, and after the annular sleeve 11 is sleeved on the pipeline 20 to be detected, the opened connecting port is reconnected through the bolt. Other connection methods such as a snap connection may also be used, and the embodiment of the present invention is not limited herein.
Optionally, the first end of length sensor 12 and the first assigned position of waiting to detect the pipeline 20 outer wall can be the bearing connection, still probably produces deformation under waiting to detect the pipeline under the effect of soil thrust, and the bearing connection can improve the angle according to deformation, avoids waiting to detect the deformation of pipeline and leads to length sensor to damage.
Alternatively, the surface of the annular sleeve 11 in contact with the soil may be provided with protrusions. Wait to detect pipeline 20 and ring sleeve 11 and all bury in soil, the surface of ring sleeve all contacts with soil promptly, and the protrusion that the surface set up can increase the frictional force of ring sleeve 11 and soil to the position of fixed ring sleeve 11 more.
In summary, the embodiment of the present invention provides a pipeline axial displacement detection apparatus including an annular sleeve length sensor and a displacement determining component, wherein the annular sleeve is sleeved on a pipeline to be detected, soil is filled between the annular sleeve and the pipeline to be detected, a first end of the length sensor is connected to a first designated position on an outer wall of the pipeline to be detected, a second end of the length sensor is connected to a second designated position of the annular sleeve, the length sensor is configured to measure a distance between the first end and the second end, and the displacement determining component is connected to the length sensor and is configured to determine an axial displacement of the pipeline to be detected according to a change in the distance between the first end and the second end. The problem of unable axial displacement who detects oil gas pipeline among the correlation technique is solved, axial displacement's effect has been reached to the detection.
Fig. 4 is a flowchart of a method for detecting axial displacement of a pipeline according to an embodiment of the present invention, where the method includes the following steps:
And 403, installing a length sensor on the pipeline to be detected.
The length sensor comprises a first end and a second end, the first end of the length sensor is connected with a first designated position of the outer wall of the pipeline to be detected, the second end of the length sensor is connected with a second designated position of the annular sleeve, and the length sensor is used for measuring the distance between the first end and the second end.
And step 404, determining the axial displacement of the pipeline to be detected according to the distance change between the first end and the second end.
Determining the axial displacement of the pipeline to be detected according to a displacement determination formula, wherein the displacement determination formula is as follows:
wherein L isA'BIs the distance between the second end and the first end of the displaced length sensor, LABIs the distance between the second end and the first end of the length sensor before displacement, LOBIs the relative distance L between the second specified position of the annular sleeve and the pipeline to be detectedAA'Is the displacement distance of the pipe to be detected.
Optionally, the outer diameter of the annulus is 20% greater than the inner diameter of the annulus.
Optionally, the difference between the outer diameter and the inner diameter of the annular sleeve and the quality are inversely related to the compactness of the soil.
Optionally, the annular sleeve includes a first half ring and a second half ring, and the first half ring and the second half ring are buckled on the pipeline to be detected through flange connection.
In summary, in the pipe axial displacement detection method provided in the embodiments of the present invention, the annular sleeve is sleeved on the pipe to be detected, soil is filled between the annular sleeve and the pipe to be detected, the first end of the length sensor is connected to the first designated position of the outer wall of the pipe to be detected, the second end of the length sensor is connected to the second designated position of the annular sleeve, the length sensor is configured to measure the distance between the first end and the second end, and the displacement determining component is connected to the length sensor and configured to determine the axial displacement of the pipe to be detected according to the change in the distance between the first end and the second end. The problem of unable axial displacement who detects oil gas pipeline among the correlation technique is solved, axial displacement's effect has been reached to the detection.
The above description is only exemplary of the present invention and should not be taken as limiting, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A pipeline axial displacement detection device for detecting a pipeline buried in soil, the pipeline axial displacement detection device comprising:
an annular sleeve, a length sensor and a displacement determining assembly;
the annular sleeve is sleeved on the pipeline to be detected, soil is filled between the annular sleeve and the pipeline to be detected, and bulges are arranged on the surfaces of the annular sleeve, which are in contact with the soil;
the length sensor is a telescopic sensor for measuring length, and comprises a first end and a second end, the first end is in bearing connection with a first designated position of the outer wall of the pipeline to be detected, the second end is connected with a second designated position of the annular sleeve, and the length sensor is used for measuring the distance between the first end and the second end;
the displacement determining component is mounted on the pipeline to be detected, the displacement determining component is connected with the length sensor, the displacement determining component is used for determining the axial displacement of the pipeline to be detected according to a displacement determining formula, and the displacement determining formula is as follows:
wherein L isA'BIs the distance, L, between the second end and the first end of the length sensor after displacementABIs the distance between the second end of the length sensor and the first end before displacement, LOBThe relative distance L between the second specified position of the annular sleeve and the pipeline to be detectedAA'The displacement distance of the pipeline to be detected is obtained;
the outer diameter of the annular sleeve is 20% greater than the inner diameter of the annular sleeve;
the difference between the outer diameter and the inner diameter and the quality of the annular sleeve are inversely related to the compactness of the soil.
2. The pipe axial displacement detection device of claim 1, wherein the annular sleeve comprises a first half ring and a second half ring, the first half ring and the second half ring being flanged.
3. A method for detecting axial displacement of a pipe, the method being used for detecting a pipe buried in soil, the method comprising:
sleeving an annular sleeve ring on a pipeline to be detected;
filling soil between the annular sleeve and the pipeline to be detected;
the surface of the annular sleeve, which is in contact with the soil, is provided with a bulge;
a length sensor is arranged on the pipeline to be detected, and the length sensor is a telescopic sensor for measuring length;
the length sensor comprises a first end and a second end, the first end of the length sensor is connected with a first appointed position bearing of the outer wall of the pipeline to be detected, the second end of the length sensor is connected with a second appointed position of the annular sleeve, and the length sensor is used for measuring the distance between the first end and the second end;
installing a displacement determining component on the pipeline to be detected, wherein the displacement determining component is used for determining the axial displacement of the pipeline to be detected according to a displacement determining formula, and the displacement determining formula is as follows:
wherein L isA'BIs the distance, L, between the second end and the first end of the length sensor after displacementABIs the distance between the second end of the length sensor and the first end before displacement, LOBThe relative distance L between the second specified position of the annular sleeve and the pipeline to be detectedAA'The displacement distance of the pipeline to be detected is obtained;
the outer diameter of the annular sleeve is 20% larger than the inner diameter of the annular sleeve, and the difference between the outer diameter and the inner diameter and the quality of the annular sleeve are inversely related to the compactness of the soil.
4. The method according to claim 3, wherein the annular sleeve comprises a first half ring and a second half ring, and the first half ring and the second half ring are fastened on the pipeline to be detected through flange connection.
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