CN117346716B - Method and device for measuring size of soil vacuum extraction pipeline - Google Patents
Method and device for measuring size of soil vacuum extraction pipeline Download PDFInfo
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- CN117346716B CN117346716B CN202311648770.2A CN202311648770A CN117346716B CN 117346716 B CN117346716 B CN 117346716B CN 202311648770 A CN202311648770 A CN 202311648770A CN 117346716 B CN117346716 B CN 117346716B
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- 238000000605 extraction Methods 0.000 title claims abstract description 87
- 239000002689 soil Substances 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000000523 sample Substances 0.000 claims abstract description 83
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 238000000691 measurement method Methods 0.000 claims abstract description 7
- 230000007704 transition Effects 0.000 claims description 95
- 238000004513 sizing Methods 0.000 claims 2
- 239000007789 gas Substances 0.000 description 15
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 239000002680 soil gas Substances 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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 provides a size measurement method and a device for a soil vacuum extraction pipeline, wherein the measurement method comprises the steps of device positioning, data acquisition, first end data judgment, second extension part data judgment and radial data judgment, the measurement device comprises a horizontal pushing rod, a probe support, a measurement probe, a travel recorder and a data processor, the measurement method is based on the shape characteristics of the soil vacuum extraction pipeline, the size measurement method for the soil vacuum extraction pipeline is set, the size of the soil vacuum extraction pipeline is ensured to meet the requirement, the measurement device takes the data inflection point of the measurement probe as the calibration point of the travel of a travel recorder, the measurement probe is linked with the travel record, the travel stage is fed back without an additional measurement device or an observation device, and the data acquisition process is simple.
Description
Technical Field
The invention relates to the field of length measurement, in particular to a method and a device for measuring the size of a soil vacuum extraction pipeline.
Background
Soil vacuum extraction is a method for in-situ remediation of soil volatile organic pollution, and is used for solving the pollution problem of stratum medium in a gas-covered zone. The basic principle of the vacuum extraction of the soil is that a vacuum pump is used for extracting and generating negative pressure, when air flows through a pollution area, volatile and semi-volatile organic pollutants in soil pores are desorbed and entrained, the volatile and semi-volatile organic pollutants are taken away by air flow and are collected by an extraction well and finally treated, so that the aim of purifying the soil with the air-covered zone is fulfilled. The extracted gas is discharged into the atmosphere after being treated by removing water vapor, absorbing and the like, or a corresponding gas treatment technology is adopted according to different pollutants.
The soil vacuum extraction system is generally realized by arranging a gas well in a gas-wrapping belt, arranging a vacuum extraction pipeline with holes in the gas well, enabling the vacuum extraction pipeline to generate negative pressure through the operation of a vacuum pump, enabling soil gas to enter the gas well, and extracting the soil gas in the gas well outwards by the vacuum extraction pipeline, thereby realizing the soil vacuum extraction.
Based on different geological conditions, the laying mode of the vacuum extraction pipeline comprises two modes of vertical laying and horizontal laying, the pipeline laid horizontally can form multidirectional airflow during operation, the vacuum extraction pipeline laid horizontally in the prior art is a cylindrical pipeline with holes in the circumferential direction, and the problems of poor gas flowability and low extraction efficiency exist for the pipeline of the type.
Disclosure of Invention
The invention provides a size measurement method of a soil vacuum extraction pipeline, aiming at the problems, comprising the following steps of:
s1: positioning the device: positioning a soil vacuum extraction pipeline size measuring device, and ensuring that a path of a horizontal pushing rod driving the probe bracket to move coincides with the central axis of the soil vacuum extraction pipeline;
s2: and (3) data acquisition: the end part of the first end of the soil vacuum extraction pipeline is used as a starting point to drive the probe support to advance at a constant speed, and the following data are recorded by the travel recorder: travel S of the probe holder at the first end and in the first extension 1 The probe passes through the stroke S of the truncated cone-shaped second extension part 5-1 The travel S of the probe support passing through the truncated cone-shaped second transition part 5 The following data were recorded by the measurement probe: radius R of cross-section of cylindrical first end and first extension 1 Radius R of cross-section of cylindrical expanded portion 3 Radius of cross-section R of truncated cone-shaped second extension 5-1 Radius of cross-section R of truncated cone-shaped second transition portion 5 Radius R of the cross-section of the cylindrical second end 2 ；
S3: and (3) data judgment: the data processor processes the data acquired by the travel recorder and the measuring probe 6-3 and judges whether the size of the soil vacuum extraction pipeline is qualified or not based on the processed data.
Preferably, the data determining step specifically includes the steps of:
s3-1: first end data judgment: measuring the generatrix length L of a truncated cone-shaped first transition 4 OA Measuring the distance L between the center point of the air hole closest to the expanded portion 3 and the intersection position of the first transition portion 4 and the first extension portion 1-1 in the direction of the bus bar OC Measuring the length L of the first end 1 1 Determination S 1 If the following formula is satisfied, the step S3-2 is entered, if not, the first end size is judged to be unqualified,
；
s3-2: second extension data determination: judging the radius R of the section circle 5-1 If the second extending part is linearly increased, if not, the second extending part is judged to be in wrong offset direction, if so, the radius R of the cross section of the second extending part 5-1 is further judged 5-1 Radius R of the cross-section of the second transition 5 5 The probe holder 6-2 passes through the stroke S of the truncated cone-shaped second extension 5-1 5-1 The travel S of the probe holder 6-2 through the truncated cone-shaped second transition part 5 5 If the following formula is satisfied, the process proceeds to step S3-3, if not, the second extension portion is determined to be unqualified,
；
wherein R is 5-1max Is the maximum value in the radius of the cross-section of the second extension 5-1, R 5-1min Is the minimum value in the radius of the cross-section of the second extension 5-1, R 5max Is the maximum value in the radius of the cross-section of the second transition 5, R 5min Is the minimum value of the radii of the cross-section of the second transition 5;
s3-3: radial data judgment: determining the radius R of the cross-section of the cylindrical first end 1 and the first extension 1-1 1 Minimum value R of radius of cross-section of the second extension 5-1 5-1min Radius R of the cross-section of the cylindrical second end 2 2 Whether the following formula is satisfied or not, if so, judging that the size of the soil vacuum extraction pipeline is qualified, and if not, judging that the radial size of the soil vacuum extraction pipeline is unqualified.
Preferably, the soil vacuum extraction conduit being measured has the following structure: the soil vacuum extraction pipeline comprises a first end, a second end and an expanded diameter part, wherein the first end is far away from the vacuum pump, the second end is close to the vacuum pump, the expanded diameter part is positioned between the first end and the second end, air holes are formed in the first end, the second end 2 and the expanded diameter part, the air hole direction is perpendicular to the surface of the soil vacuum extraction pipeline, the first end, the second end 2 and the expanded diameter part are cylindrical, and the diameter D of the first end 1 Diameter D of the second end 2 Diameter D of the expanded portion 3 The dimensional relationship is D 1 <D 2 <D 3 。
Preferably, a first truncated cone-shaped transition part is arranged between the first end and the diameter-expanding part of the measured soil vacuum extraction pipeline, and the truncated cone diameter of the first transition part increases from the first end to the diameter-expanding part; a second transition part with a truncated cone shape is arranged between the second end and the diameter-expanding part, the diameter of the truncated cone of the second transition part is reduced from the diameter-expanding part to the second end, and air holes perpendicular to the side surfaces of the first transition part and the second transition part are arranged on the first transition part and the second transition part. Preferably, the soil vacuum extraction conduit being measured has at a first end a cylindrical first extension extending radially inwardly of the enlarged diameter portion from its circular cross-section intersecting the first transition portion as an origin; a truncated cone-shaped second extension part extending obliquely to the inside of the expanded diameter part is arranged at the intersecting circular section of the second transition part and the expanded diameter part, wherein no air hole is arranged on the first extension part and the second extension part.
Defining the intersection point of the first transition part and the first extension part as a point O, the end point of the first extension part in the diameter expanding part as a point B, the intersection point of the first transition part and the diameter expanding part as a point A, the point C which is positioned on the first transition part and is closest to the center point of the air hole of the diameter expanding part, and defining the included angle between the line segment OA and the OB as theta AOB The length requirement of the first extension satisfies the following relationship: l (L) OC /COSθ AOB ≤L 1-1 ≤L OA /COSθ AOB Wherein L is OC Is the distance between the intersection point O of the first transition part and the first extension part and the center point C of the air hole which is positioned on the first transition part and is closest to the diameter expanding part, L OA Is the distance L between the intersection point O of the first transition part and the first extension part and the intersection point A of the first transition part and the diameter-expanding part 1-1 Is the length of the first extension.
Preferably, the soil vacuum extraction conduits being measured have the following dimensional relationships:
defining the point P of intersection of the second transition part, the expanded diameter part and the second extension part, the point Q of intersection of the second transition part and the second end, the point E of end point of the second extension part in the expanded diameter part and the point EThe sense line segment PD is a line segment perpendicular to the expanded diameter portion, wherein the length requirement of the second extension portion is satisfied such that the projection of the second extension portion in the direction perpendicular to the expanded diameter portion does not intersect with the extension surface of the second end portion in the expanded diameter portion, and the included angle theta between the second extension portion and the second transition portion QPE The following relationship is satisfied:
θ QPD ≤θ QPE ≤90°
wherein θ QPD Is an included angle between the second transition part and the diameter expanding part in the vertical direction.
Preferably, the soil vacuum extraction conduits being measured have the following dimensional relationships: θ AOB The value of (2) is 45 deg..
The invention also provides a size measuring device of the soil vacuum extraction pipeline, which comprises a horizontal pushing rod, a probe support, a measuring probe, a stroke recorder and a data processor, wherein one end of the horizontal pushing rod is connected with the probe support and is driven to move along the central axis direction of the soil vacuum extraction pipeline, the number of the probe supports is not less than two, the endpoints of the horizontal pushing rod are uniformly distributed in the circumferential direction, the measuring probe is positioned at the tail end of the probe support, the probe support is connected with the stroke recorder and is used for recording the movement stroke of the probe support, the measuring probe is used for measuring the radial size of each component of the soil vacuum extraction pipeline, and data acquired by the stroke recorder and the measuring probe are fed back to the data processor for processing.
Preferably, the probe holder will start moving inside the soil vacuum extraction conduit from the end of the first end.
The beneficial effects are that: 1) Based on the shape characteristics of the soil vacuum extraction pipeline, a size measurement method aiming at the soil vacuum extraction pipeline is set, so that the size of the soil vacuum extraction pipeline is ensured to meet the requirements.
2) The soil vacuum extraction pipeline is designed through the structures and the dimensions of the first end, the second end, the diameter expanding part, the first transition part, the second transition part, the first extension part and the second extension part, so that the gas circulation rate of the soil vacuum extraction pipeline is improved, the opposite flushing of air flow is avoided, the air flow direction is close to the main suction direction of the vacuum pump, and the gas extraction efficiency is improved.
3) The measuring device takes the data inflection point of the measuring probe as the calibration point of the travel recorder, and the measuring probe is linked with the travel record, so that an additional measuring device or an observation device is not needed to feed back the travel stage, and the data acquisition process is simple.
Drawings
FIG. 1 is a schematic view of a soil vacuum extractor tube of the present invention in a gas well;
FIG. 2 is a schematic view of a soil vacuum extraction pipeline according to the present invention;
FIG. 3 is an enlarged view of a portion of a first end of the soil vacuum extraction conduit of the present invention;
FIG. 4 is a partial enlarged view of the second end of the soil vacuum extraction conduit of the present invention;
FIG. 5 is a schematic view of a first end dimension measurement of a soil vacuum extraction conduit according to the present invention;
FIG. 6 is a schematic view of the measurement of the second end of the soil vacuum extraction pipeline of the present invention.
Detailed Description
Referring to fig. 1 of the drawings, the soil vacuum extractor pipeline of the present invention is horizontally disposed in a gas well (not shown), and the arrows in the drawing show the main flow direction of the gas during the operation of the vacuum pump. The soil vacuum extraction pipeline comprises a first end 1, a second end 2 and an expanded diameter part 3, wherein the first end 1 is far away from the vacuum pump, the second end 2 is close to the vacuum pump, the expanded diameter part 3 is positioned between the first end 1 and the second end 2, air holes are formed in the first end 1, the second end 2 and the expanded diameter part 3, the air hole direction is perpendicular to the surface of the soil vacuum extraction pipeline, the first end 1, the second end 2 and the expanded diameter part 3 are cylindrical, and the diameter D of the first end 1 Diameter D of the second end 2 Diameter D of the expanded portion 3 The dimensional relationship is D 1 <D 2 <D 3 . On the premise of satisfying the above dimensional relationship, specific values of the diameters and lengths of the first end 1, the second end 2, and the expanded diameter portion 3 may be set according to specific working conditions.
A diameter-enlarging part 3 with larger diameter is arranged between the first end 1 and the second end 2, thereby increasing the contact area between the soil vacuum extraction pipeline and the gas, and the side wall area of the diameter-enlarging part 3The device can be used for increasing the number of air holes and improving the gas flow quantity in the extraction process. Diameter D of first end 1 Smaller than the second end diameter D 2 The air flow in the direction parallel to the axis of the pipeline can be prevented from being blocked by the pipe wall when flowing from the first end 1 to the second end 2, so that backflow is caused, and the air flow rate is influenced.
Referring to fig. 2 of the specification, a first transition part 4 in the shape of a truncated cone is arranged between a first end 1 and an expanded diameter part 3 of the soil vacuum extraction pipeline, and the diameter of the truncated cone of the first transition part 4 increases from the first end 1 to the expanded diameter part 3; a second truncated cone-shaped transition part 5 is arranged between the second end 2 and the expanded diameter part 3, the truncated cone diameter of the second transition part 5 is reduced from the expanded diameter part 3 to the second end 2, and air holes perpendicular to the side surfaces of the first transition part 4 and the second transition part 5 are arranged on the first transition part 4 and the second transition part 5. The first end 1 has a cylindrical first extension portion 1-1 extending radially inward of the expanded diameter portion 3 from a circular cross section thereof intersecting the first transition portion 4 as a starting point; at the circular cross section of the intersection of the second transition portion 5 and the expanded diameter portion 3, there is a truncated cone-shaped second extension portion 5-1 extending obliquely to the inside of the expanded diameter portion 3, wherein no air hole is provided on both the first extension portion 1-1 and the second extension portion 5-1.
Referring to fig. 3 of the specification, for the cross-sectional view of the first end partial enlarged view, the intersection point of the first transition portion 4 and the first extension portion 1-1 is defined as a point O, the end point of the first extension portion 1-1 located in the expanded diameter portion 3 is defined as a point B, the intersection point of the first transition portion 4 and the expanded diameter portion 3 is defined as a point a, the point located on the first transition portion 4 and the center point of the air hole closest to the expanded diameter portion 3 is defined as a point C, and the included angle between the line segment OA and OB is defined as θ AOB The length requirement of the first extension 1-1 satisfies the following relationship:
L OC /COSθ AOB ≤L 1-1 ≤L OA /COSθ AOB wherein L is OC Is the distance L between the intersection point O of the first transition part 4 and the first extension part 1-1 and the center point C of the air hole which is positioned on the first transition part 4 and is closest to the expanding part 3 OA The distance L between the intersection point O of the first transition part 4 and the first extension part 1-1 and the intersection point A of the first transition part 4 and the diameter-expanding part 3 1-1 Is the length of the first extension partDegree.
Based on different specific working conditions, theta AOB The value of (2) can be customized and is preferably 45 degrees.
Through the size setting, after the air flow vertical to the first transition part 4 enters the soil vacuum extraction pipeline, the air flow impacts the first extension part 1-1, so that the air flow direction is converged with the air flow vertical to the diameter expanding part 3 after being deflected, and the converged air flow direction is closer to the direction parallel to the pipeline axis and is closer to the main suction direction of the vacuum pump, thereby being beneficial to the suction rate improvement. At the same time, the above-mentioned dimensions are set so as to avoid that the first extension is too long to disturb the air flow perpendicular to the direction of the enlarged diameter portion 3, and that the first extension is too short to deflect the air flow perpendicular to the first transition portion 4.
Referring to fig. 4 of the specification, for the sectional view of the second end partial enlarged view, an intersection point where the second transition portion 5, the expanded diameter portion 3, and the second extension portion 5-1 converge is defined as a point P, an intersection point where the second transition portion 5 and the second end 2 are defined as a point Q, an end point where the second extension portion 5-1 is located in the expanded diameter portion 3 is defined as a point E, and a line segment PD is defined as a line segment perpendicular to the expanded diameter portion 3. Wherein the length of the second extension part 5-1 is required to meet the requirement that the projection of the second extension part 5-1 in the direction perpendicular to the diameter-expanding part 3 does not intersect with the extension surface of the second end 2 into the diameter-expanding part 3, and the included angle theta between the second extension part 5-1 and the second transition part 5 QPE The following relationship is satisfied:
θ QPD ≤θ QPE ≤90°
wherein θ QPD Is the included angle between the second transition part 5 and the expanding part 3 in the vertical direction.
The length of the second extension 5-1 is such that the projection of the second extension 5-1 in a direction perpendicular to the enlarged diameter portion 3 does not intersect the extension of the second end 2 into the enlarged diameter portion 3, i.e. the smallest diameter of the frustoconical second extension 5-1 is larger than the diameter of the second end 2, thereby avoiding interference in the main gas flow direction into the second end 2 in a direction parallel to the pipe axis. θ QPE The air flow perpendicular to the second transition part 5 can be deflected at an angle of less than or equal to 90 DEG, so that the air flow direction of the air flow is more nearly parallel to the axis of the pipeline, the air suction efficiency is improved, and the air suction efficiency is improved QPD ≤θ QPE The excessive deflection angle of the air flow can be avoided, and the air flow can be in opposite impact with the air flow vertically entering the second transition part 5.
Referring to fig. 5-6 of the specification, the soil vacuum extraction pipeline size measuring device 6 of the invention is shown in the drawing, and comprises a horizontal pushing rod 6-1, a probe support 6-2, a measuring probe 6-3, a travel recorder and a data processor, wherein one end of the horizontal pushing rod 6-1 is connected with the probe support 6-2 and is driven to move along the central axis direction of the soil vacuum extraction pipeline, the number of the probe supports 6-2 is not less than two, the endpoints of the horizontal pushing rod 6-1 are uniformly distributed in the circular circumference, the measuring probe 6-3 is positioned at the tail end of the probe support 6-2, the horizontal pushing rod 6-1 can drive the probe support 6-2 to horizontally move in the form of a hydraulic cylinder, a gear rack, a screw nut and the like, and the probe support 6-2 is connected with the travel recorder (not shown) for recording the movement travel of the probe support 6-2. The measuring probe 6-3 is used for measuring the radial dimension of each component of the soil vacuum extraction pipeline. The data acquired by the travel recorder and the measuring probe 6-3 are fed back to the data processor for processing.
Since the second end 2 is connected to the vacuum pump and the bent portion of the pipe, the probe holder 6-2 will start to move inside the soil vacuum extraction pipe with the end of the first end 1 as the starting point for measurement.
The invention relates to a method for measuring the size of a soil vacuum extraction pipeline, which comprises the following steps:
s1: positioning the device: the size measuring device of the soil vacuum extraction pipeline is positioned, and the path of the horizontal pushing rod 6-1 driving the probe bracket 6-2 to move is ensured to coincide with the central axis of the soil vacuum extraction pipeline.
S2: and (3) data acquisition: the end part of the first end 1 of the soil vacuum extraction pipeline is used as a starting point to drive the probe support 6-2 to advance at a constant speed, and the following data are recorded by a travel recorder: travel S of the probe holder 6-2 in the first end 1 and the first extension 1-1 1 The probe holder 6-2 passes through the stroke S of the truncated cone-shaped second extension 5-1 5-1 The probe support 6-2 passes through the stroke S of the truncated cone-shaped second transition part 5 5 The following data are recorded by the measurement probe 6-3: cylindrical first end 1 and first extensionRadius R of cross-section of extension 1-1 1 Radius R of cross-section of cylindrical expanded portion 3 3 Radius of cross-section R of truncated cone-shaped second extension 5-1 5-1 Radius of cross-section R of truncated cone-shaped second transition 5 5 Radius R of the cross-section of the cylindrical second end 2 2 。
During the movement of the probe holder 6-2, the data measured by the measurement probe 6-3 will go through the following five phases:
the first stage: the measuring probe 6-3 is located in the cylindrical first end 1 and the first extension 1-1, and the radius R of the cross-section is measured 1 Is a fixed value.
And a second stage: the measuring probe 6-3 enters the diameter-expanding part 3, and the data measured by the measuring probe 6-3 are the same fixed value, but the value is obviously larger than R 1 The travel recorder can judge that the measuring probe 6-3 finishes the travel of the cylindrical first end 1 and the first extension part 1-1 through the obvious increase of the numerical value of the measuring probe 6-3, and the travel recorder performs calibration at the moment when the numerical value of the measuring probe 6-3 is obviously increased, so that the travel S of the probe bracket 6-2 in the first end 1 and the first extension part 1-1 can be obtained 1 。
And a third stage: the measuring probe 6-3 enters the truncated cone-shaped second extension 5-1, at which time the radius R of the truncated circle is measured 5-1 A plurality of data points that increase linearly.
Fourth stage: the measuring probe 6-3 enters the truncated cone-shaped second transition part 5, and the radius R of the truncated cone is measured 5 Is a plurality of data points that decrease linearly.
Fifth stage: the measuring probe 6-3 enters the cylindrical second end 2, at which time the radius R of the cross-section is measured 2 Is a fixed value.
In the third to fifth stages, the travel recorder performs calibration by using the inflection point of the measured data of the measuring probe 6-3 as a time point, so as to obtain the travel S of the probe support 6-2 passing through the truncated cone-shaped second extension part 5-1 5-1 The probe support 6-2 passes through the stroke S of the truncated cone-shaped second transition part 5 5 . By the data acquisition method, the data inflection point of the measuring probe is used as the calibration point of the travel recorder, and an additional measuring device or an observation device is not needed for feedbackAnd in the journey stage, the data acquisition process is simple.
S3: and (3) data judgment: the data processor processes the data acquired by the travel recorder and the measuring probe 6-3 and judges whether the size of the soil vacuum extraction pipeline is qualified or not based on the processed data.
Wherein, S3: the data determination includes the steps of:
s3-1: first end data judgment: measuring the generatrix length L of a truncated cone-shaped first transition 4 OA Measuring the distance L between the center point of the air hole closest to the expanded portion 3 and the intersection position of the first transition portion 4 and the first extension portion 1-1 in the direction of the bus bar OC Measuring the length L of the first end 1 1 Determination S 1 If the following formula is satisfied, the step S3-2 is entered, if not, the first end size is judged to be unqualified,
。
s3-2: second extension data determination: judging the radius R of the section circle 5-1 If the second extending part is linearly increased, if not, the second extending part is judged to be in wrong offset direction, if so, the radius R of the cross section of the second extending part 5-1 is further judged 5-1 Radius R of the cross-section of the second transition 5 5 The probe holder 6-2 passes through the stroke S of the truncated cone-shaped second extension 5-1 5-1 The travel S of the probe holder 6-2 through the truncated cone-shaped second transition part 5 5 If the following formula is satisfied, the process proceeds to step S3-3, if not, the second extension portion is determined to be unqualified,
；
wherein R is 5-1max Is the maximum value in the radius of the cross-section of the second extension 5-1, R 5-1min Is the minimum value in the radius of the cross-section of the second extension 5-1, R 5max Is the maximum value in the radius of the cross-section of the second transition 5, R 5min Is the minimum value of the radii of the cross-section of the second transition 5.
S3-3: radial data judgment: determining the radius R of the cross-section of the cylindrical first end 1 and the first extension 1-1 1 Minimum value R of radius of cross-section of the second extension 5-1 5-1min Radius R of the cross-section of the cylindrical second end 2 2 Whether the following formula is satisfied or not, if so, judging that the size of the soil vacuum extraction pipeline is qualified, and if not, judging that the radial size of the soil vacuum extraction pipeline is unqualified.
The foregoing is merely exemplary of the present invention and is not intended to limit the scope of the present invention; all equivalent methods or structures that may be made using the teachings of this invention are included within the scope of this invention.
Claims (5)
1. A method for measuring the size of a soil vacuum extraction pipeline, the method comprising the steps of:
s1: positioning the device: positioning a soil vacuum extraction pipeline size measuring device, and ensuring that a path of a horizontal pushing rod driving the probe bracket to move coincides with the central axis of the soil vacuum extraction pipeline;
s2: and (3) data acquisition: the end part of the first end of the soil vacuum extraction pipeline is used as a starting point to drive the probe support to advance at a constant speed, and the following data are recorded by the travel recorder: travel S of the probe holder at the first end and in the first extension 1 The probe passes through the stroke S of the truncated cone-shaped second extension part 5-1 The travel S of the probe support passing through the truncated cone-shaped second transition part 5 The following data were recorded by the measurement probe: radius R of cross-section of cylindrical first end and first extension 1 Radius R of cross-section of cylindrical expanded portion 3 Radius of cross-section R of truncated cone-shaped second extension 5-1 Radius of cross-section R of truncated cone-shaped second transition portion 5 Radius R of the cross-section of the cylindrical second end 2 ；
S3: and (3) data judgment: the data processor processes the data acquired by the travel recorder and the measuring probe and judges whether the size of the soil vacuum extraction pipeline is qualified or not based on the processed data;
the data judging step specifically comprises the following steps:
s3-1: first end data judgment: measuring the generatrix length L of a truncated cone-shaped first transition part OA Measuring the distance L between the center point of the air hole closest to the diameter-expanding part and the intersection position of the first transition part and the first extension part in the direction of the bus OC Measuring the length L of the first end 1 Determination S 1 If the following formula is satisfied, the step S3-2 is entered, if not, the first end size is judged to be unqualified,
；
s3-2: second extension data determination: judging the radius R of the section circle 5-1 If the deviation direction of the second extending part is not wrong, further judging the radius R of the cross section of the second extending part 5-1 Radius R of cross-section of second transition 5 The travel S of the probe support passing through the truncated cone-shaped second extension part 5-1 The travel S of the probe support passing through the truncated cone-shaped second transition part 5 If the following formula is satisfied, the process proceeds to step S3-3, if not, the second extension portion is determined to be unqualified,
；
wherein R is 5-1max Is the maximum value in the radius of the cross-section of the second extension, R 5-1min Is the minimum value in the radius of the cross-section of the second extension, R 5max Is the maximum value in the radius of the cross-section of the second transition 5, R 5min Is the minimum value in the radius of the cross-section of the second transition part;
s3-3: radial data judgment: judging the radius R of the cross-section of the cylindrical first end and the first extension part 1 Minimum value R of radius of cross-section of the second extension part 5-1min Radius R of the cross-section of the cylindrical second end 2 Whether the following formula is satisfied, if so, judging that the size of the soil vacuum extraction pipeline is qualified, and if not, judging thatThe radial size of the broken soil vacuum extraction pipeline is unqualified;
the soil vacuum extraction pipeline to be measured has the following structure: the soil vacuum extraction pipeline comprises a first end, a second end and an expanded diameter part, wherein the first end is far away from the vacuum pump, the second end is close to the vacuum pump, the expanded diameter part is positioned between the first end and the second end, air holes are formed in the first end, the second end and the expanded diameter part, the air hole direction is perpendicular to the surface of the soil vacuum extraction pipeline, the first end, the second end and the expanded diameter part are cylindrical, and the diameter D of the first end is equal to that of the expanded diameter part 1 Diameter D of the second end 2 Diameter D of the expanded portion 3 Is D in the dimensional relationship 1 <D 2 <D 3 ；
The measured soil vacuum extraction pipeline is provided with a truncated cone-shaped first transition part between the first end and the diameter-expanding part, and the truncated cone diameter of the first transition part is increased from the first end to the diameter-expanding part; a truncated cone-shaped second transition part is arranged between the second end and the diameter-expanding part, the truncated cone diameter of the second transition part is reduced from the diameter-expanding part to the second end, and air holes perpendicular to the side surfaces of the first transition part and the second transition part are arranged on the first transition part and the second transition part;
the measured soil vacuum extraction pipeline is provided with a cylindrical first extension part which takes a circular cross section intersecting with the first transition part as a starting point and radially extends to the inside of the expanding part at the first end; a truncated cone-shaped second extension part extending obliquely to the inside of the expanded diameter part is arranged at the intersecting circular section of the second transition part and the expanded diameter part, wherein no air hole is arranged on the first extension part and the second extension part;
the measured soil vacuum extraction conduits have the following dimensional relationships:
defining the intersection point of the first transition part and the first extension part as a point O, the end point of the first extension part in the diameter expanding part as a point B, the intersection point of the first transition part and the diameter expanding part as a point A, the point C which is positioned on the first transition part and is closest to the center point of the air hole of the diameter expanding part, and defining the included angle between the line segment OA and the OB as theta AOB The length requirement of the first extension satisfies the following relationship: l (L) OC /COSθ AOB ≤L 1-1 ≤L OA /COSθ AOB Wherein L is OC Is the distance between the intersection point O of the first transition part and the first extension part and the center point C of the air hole which is positioned on the first transition part and is closest to the diameter expanding part, L OA Is the distance L between the intersection point O of the first transition part and the first extension part and the intersection point A of the first transition part and the diameter-expanding part 1-1 Is the length of the first extension.
2. A method for sizing a soil vacuum extraction conduit as claimed in claim 1 wherein the soil vacuum extraction conduit being measured has the following dimensional relationship:
defining a point P which is an intersection point converged by the second transition part, the expanding part and the second extending part, a point Q which is an intersection point between the second transition part and the second end, a point E which is an end point of the second extending part in the expanding part and a line segment PD which is a line segment perpendicular to the expanding part, wherein the length requirement of the second extending part is satisfied that the projection of the second extending part in the perpendicular direction of the expanding part is not intersected with an extending surface in the expanding part from the second end, and an included angle theta between the second extending part and the second transition part QPE The following relationship is satisfied:
θ QPD ≤θ QPE ≤90°
wherein θ QPD Is an included angle between the second transition part and the diameter expanding part in the vertical direction.
3. A method for measuring the dimensions of a soil vacuum extraction conduit as claimed in claim 2 wherein the soil vacuum extraction conduit being measured has the following dimensional relationship: θ AOB The value of (2) is 45 deg..
4. The size measurement device of the soil vacuum extraction pipeline, the device is used for realizing the size measurement method of the soil vacuum extraction pipeline according to any one of claims 1-3, and the device is characterized by comprising a horizontal pushing rod, a probe support, a measurement probe, a travel recorder and a data processor, wherein one end of the horizontal pushing rod is connected with the probe support and is driven to move along the central axis direction of the soil vacuum extraction pipeline, the number of the probe supports is not less than two, endpoints of the horizontal pushing rod are uniformly distributed in the circular circumferential direction, the measurement probe is positioned at the tail end of the probe support, the probe support is connected with the travel recorder and is used for recording the movement travel of the probe support, the measurement probe is used for measuring the radial size of each component of the soil vacuum extraction pipeline, and data acquired by the travel recorder and the measurement probe are fed back to the data processor for processing.
5. A sizing device for a soil vacuum extraction pipe as claimed in claim 4 wherein the probe support is arranged to begin moving inwardly of the soil vacuum extraction pipe from the end of the first end.
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